Danfoss AK-CC25 Fixed Industrial Refrigeration Controller User Manual

User Guide

Case/room controller (TXV)

AK-CC25 Pro and

AK-CC25 Pro BT

SW Ver. 1.3x

For refrigeration appliances and cold storage rooms

Contents

Introduction ...................................................................................... 3

Application ...................................................................................... 3

Hardware features......................................................................... 3

Features and functions................................................................ 3

Principle ...................................................................................... 4

Application coverage ................................................................... 4

Operation ...................................................................................... 8

User interface ...................................................................................... 8

Display ...................................................................................... 8

Display modes ................................................................................ 8

Display operation and related settings ................................. 9

Operation via AK-CC Connect App .......................................15

Commissioning .................................................................................17

Protection of conguration ..................................................... 17

Quick setup ...................................................................................17

Functions and features ..............................................................19

Applications ....................................................................................19

Wiring diagrams ..........................................................................23

Special wiring details ................................................................. 24

Technical data...............................................................................26

Functions ....................................................................................28

Main switch ...................................................................................28

Temperature control ..................................................................28

Thermostat temperature ...............................................28

Thermostat control ..........................................................29

Emergency control ..........................................................30

Night setback ....................................................................30

Frost protection ................................................................31

Temperature pulldown – quick freeze .....................31

Heating thermostat ......................................................... 32

Melt function ..................................................................... 33

Food temperature and product sensor ...............................33

Temperature alarm monitoring .............................................33

Switch operation mode – Plugin for MT and LT ...............33

Compressor control .................................................................... 34

ON/OFF control of a single compressor...................34

ON/OFF control of two compressors -

single refrigeration circuit .............................................34

ON/OFF control of two compressors –

Independent refrigeration circuits ............................35

Variable speed compressor ..........................................36

Compressor anti cycle timers ......................................38

Compressor safety monitoring ...................................38

Defrost control .............................................................................40

Defrost start .......................................................................40

Defrost sequence .............................................................41

Defrost method ................................................................42

Defrost stop........................................................................44

Co-ordinated defrost ......................................................45

Fan control during defrost ............................................ 46

Rail heat control during defrost .................................. 47

Drain heater control ........................................................ 47

Fan control ....................................................................................48

Rail heat control ...........................................................................48

Timer controlled ...............................................................48

Dew point controlled .....................................................49

Light control..................................................................................50

Condenser ....................................................................................50

Safety monitoring ............................................................ 50

Condenser fan control....................................................51

Door function ...............................................................................51

Leak detection ..............................................................................52

Case cleaning ................................................................................52

Case shutdown ............................................................................52

Power up delay ............................................................................53

Display control .............................................................................53

Real-time clock .............................................................................53

Master control overrides ..........................................................53

Performance monitoring ..........................................................54

Number of high temp. alarms .....................................54

Temperature quality........................................................54

Average compressor capacity .....................................55

Door openings and door open time ......................... 55

Defrost duration ...............................................................55

Network integration ...................................................................55

Parameters ....................................................................................56

Parameter grouping at display operation .......................... 56

Display menu ................................................................................ 56

Thermostat .........................................................................56

Alarm settings ...................................................................57

Compressor ........................................................................57

Defrost .................................................................................58

Fan control ..........................................................................58

Defrost schedule ..............................................................59

Miscellaneous ....................................................................60

Control .................................................................................61

DO cong and manual ................................................... 62

Service ..................................................................................63

Parameters ..........................................................................65

Connect menu .............................................................................65

Start / Stop ..........................................................................65

Conguration ....................................................................65

Thermostat control ..........................................................68

Day/Night schedule ........................................................69

Alarm limits and delays ..................................................70

Defrost control ..................................................................70

Defrost schedules ............................................................72

Compressor ........................................................................73

Condenser control ........................................................... 74

Fan control ..........................................................................74

Railheat control.................................................................75

Light/Cleaning/Leak .......................................................75

Display control ..................................................................76

Alarm relay priority ..........................................................76

Miscellaneous ....................................................................78

Advanced ............................................................................79

Alarms and fault message .............................................80

Alarm routing ....................................................................81

Operating status ...............................................................82

Appendix ....................................................................................83

Appendix A ....................................................................................83

Appendix B ....................................................................................83

Ordering ....................................................................................84

Certicates, declarations, and approvals .............................85

User Guide | Case/room controller (TXV), AK-CC25 Pro and AK-CC25 Pro BT

Application

The main applications for the AK-CC25 Pro controller are refrigerated cabinets and cold rooms with integrated compressor

and condenser. The controller can also be used for remote cabinets controlling a liquid line solenoid valve instead of a

compressor.

Hardware features

The AK-CC25 controller is a compact front panel mount controller with new innovative features like

• Backlit display with capacitive touch buttons

• Built-in Bluetooth (variant specic) for easy commissioning and service via “AK-CC Connect APP” running on mobile

device

• Built-in Modbus RS-485 communication for easy integration in network solutions

• Switch Mode Power Supply for wide voltage supply range

• Multi-purpose input and output signals for easy adaptation to a wide range of applications

Features and functions

• An intuitive display operation with large digits, icons for status read-out and 10 buttons for easy start/stop of direct

actions and navigation in menu structure.

• Broad application coverage as AK-CC25 Pro supports multiple compressor applications like: Single compressor, variable

speed compressor, dual circuit cabinets with individual compressor per circuit and single circuit cabinets with dual

compressor.

• Quick and easy selection of 8 predened applications or alternatively a fully exible programming of all controller in- and

outputs.

• Easy start-up via a quick set-up of the main application settings.

• Easy conguration and service using a mobile app with Bluetooth.

• Safety monitoring of high condenser temperature and compressor safety chain with option for lock out of compressor

operation at repeated safety stops.

• Dynamic switch between two individual controller setups supporting specic controller congurations for MT and LT

operation, respectively.

Introduction

Touch buttons

Responsive action

IP65 protection

Safe cleaning

Large digits

Easy to see from long distance

Switch mode power supply

One code number of the world

Wireless Bluetooth

Making service easy

User Guide | Case/room controller (TXV), AK-CC25 Pro and AK-CC25 Pro BT

Principle

The temperature in the appliance is registered by one or two temperature sensors located in the air ow before the

evaporator (S3) or after the evaporator (S4) respectively. A setting for thermostat, alarm thermostat and display reading

determines the inuence the two sensor values should have for each individual function.

Application coverage

The controller has 4 digital outputs, 2 digital inputs and 3 analogue inputs. However, the digital input DI1 can also be used

as an extra analogue input and the digital input DI2 can be used as an analogue frequency output for speed control of a

compressor, please refer to the gure below.

The temperature of the evaporator is registered with the S5 sensor which can be used as a Defrost stop sensor.

On the condenser side, an Sc sensor can be mounted for monitoring of the condenser temperature.

A product temperature sensor (S6) can also be mounted at the load line of the refrigerated cabinet thus representing the

food storage temperature.

The outputs will be congured based on the selected application and for the exible application all in- and outputs can be

user dened.

AK-CC25 Pro supports 9 application modes. When selecting an application mode, the inputs and outputs of the controller

will automatically be congured. However, for the exible application mode 9, the user has the option for freely selecting

the required in- and output functions and thereby adapt the controller to any application needed. Table: Overview of

application mode versus conguration of inputs and outputs shows the relation between the selected application mode and

the denition of inputs and outputs.

Figure: Hardware layout of AK-CC25 Pro

1 2 3 4

DO1 DO2

Option

card

18 19 20

DI2

AO1

DI1

AI4

DI1 DI2

21 22 23 24

A+ B-

Modbus

0 – 200 Hz

Danfoss

80G8707

15 16 17

AI2 AI3

S4 S5

120 – 230 V AC

5 6 7

DO4

10 11 128 9

DO3

13 14

AI1

Ther

. air

Cap.

Circuit 1

Normal

0.7 °C

-5.3 °C

46.7 °C

4.3 °C

2.1 °C

30%

Danfoss

80G8726

User Guide | Case/room controller (TXV), AK-CC25 Pro and AK-CC25 Pro BT

Table: Overview of application mode versus conguration of inputs and outputs

Note: In application 9 the user has the option of free conguration of all inputs and outputs.

• The Input /Output function can be freely congured.

AI4/DI1 can be used for sensor signals or digital input signals

AO1/DI2 can be used for compressor speed signal (Hz) or digital input signals

The AK-CC25 controller covers multiple plug-in applications with dierent compressor congurations.

Figure: Single circuit with two on/o compressorsFigure: Single circuit with on/o or variable speed compressor

Figure: Remote cabinet with liquid line solenoid valve

M M

Frequency

0 – 200 Hz

Danfoss

80G8703

LLSV

M M

Danfoss

80G8705

M M

Danfoss

80G870

Figure: Dual circuits with separate on/o compressors

M M

Danfoss

80G870

M M

Application

DO1

SPST

DO2

SPDT

DO4

SPDT

AI1 AI2 AI3

AI4

DI1

AO1

DI2

Modbus

S3 S4 S5 Built-in

S3 S4 S5 Sc Built-in

S3 S4 S5 Built-in

Built-in

DO3

SPST

1 Standard case MT/LT (Alarm)

2 Standard case MT/LT (Light)

3 Standard case MT/LT (Rail heat)

4 Case with condenser fan ctrl

5 Dual comp. with alarm

6 Dual comp. with light

7 Dual comp. with rail heat

8 Dual comp. with fan

9 Flexible case

cond

User Guide | Case/room controller (TXV), AK-CC25 Pro and AK-CC25 Pro BT

Wired eldbus

The AK-CC25 controller has a built-in RS-485 Modbus communication and features plug and play integration with the

Danfoss AK-SM 800A front end.

For integration with third party front ends, required documentation can be found on Danfoss product store.

Bluetooth

Some models of AK-CC25 have a built in Bluetooth interface for wireless communication with the mobile application “AK-

CC Connect”, which can be downloaded at the Google Play store (Android) or App Store (iOS).

KoolProg

KoolProg is an OEM tool for oine and on-line programming of the AK-CC25 controller as well as for production line

programming of multiple controllers. The KoolKey can be used as a USB / RS-485 converter eliminating the need to

connect AC power to the controller while programming. A standard USB/RS-485 converter can also be used, but this will

require AC power to operate the controller while performing the programming.

KoolKey 2

Besides working as a USB / RS-485 converter for KoolProg, KoolKey can also be used as a copy key for the AK-CC25

controller. KoolKey just must be connected to the RS-485 port of the controller and then the setting le placed on the

KoolKey by KoolProg, is transferred to the controller via a push on the transfer button.

Figure: ECO system

Figure: KoolKey as USB/RS-485 gateway Figure: Controller without main power

Danfoss

80G8757

Standard

USB-C cable

Interface cable

Danfoss

80G8758

KoolKey

Controller

To PC / Power bank /

5 V power supply

Interface cable

System Manager

Modbus RS-485

Modbus

RS-485

Modbus RS-485

Modbus TCP/IP*

Modbus RS-485

Modbus TCP/IP*

*Connectivity requires DHCP router/switch

AK-UI55 Bluetooth

USB

RS-485

AK-CC Connect App

AK-CC55 Single Coil UI

AK-CC55 Multi Coil

AK-CC25 family

AK-CC55 Compact

KoolKey 2.1

KoolProg

Danfoss

80G8746

nage

odb

us RS-485

odb

RS-4

odbu

s RS-4

odbus TCP

IP*

odbu

s RS-4

odbus TCP/IP*

UI55 B

RS-48

onne

55 Mu

amil

ompa

2.1

Pro

Dan

oss

874

User Guide | Case/room controller (TXV), AK-CC25 Pro and AK-CC25 Pro BT

6.2

Danfoss

80G8717

Dimensions (in mm)

Panel mounting

To guarantee IP65 protection, the controller must be xated with

the mounting brackets pushed tight on to the mounting plate

(Force: min. 245 N per bracket).

Maximum deviation between the edges of the rectangular

mounting hole from at surface: ≤ 0.5 mm (0.02 in)

Maximum roughness of the surface where the gasket is applied:

≤ 120 μm.

The allowed thickness of the mounting plate are min. 0.8 mm (0.03 inch) and max. 18 mm (0.70 inch).

Danfoss

80G8765

User Guide | Case/room controller (TXV), AK-CC25 Pro and AK-CC25 Pro BT

User interface

Display

The front display features 2 large digits, a smaller decimal digit, and a sign for negative values. It has 3 status icons and 10

capacitive touch buttons that are backlit when active in a given context.

Display modes

The display can be in 3 dierent operation modes.

Sleep mode

Whenever the display buttons have not been operated for a period of 1 min, the display will return to the sleep mode,

where only the temperature is read-out. If a defrost is on-going or an alarm is raised, the respective button will be lit up to

make the user aware of the condition.

Direct action mode

If one of the touch buttons are activated, the display changes to direct action mode. In direct action mode all valid buttons

become active, and the status icons will show the actual control status.

Operation

Figure: AK-CC25 front display

Figure: Display in sleep mode

Figure: Display in direct action mode

Icons Name Description

ECO mode Lights up when in night/ECO mode.

Cooling Lights up when cooling

Fan Lights when evaporator fans are running

Navigation buttons

Back

Navigates back to previous menu. Long press

while in direct action mode will logout user.

Navigates up in menu structure

Increase value when in setting mode

Down

Navigates down in menu structure

Increase value when in setting mode

Info menu Navigates to the controller info menu

Icons Name Description

Direct action buttons

SET

Short press: Change thermostat setpoint

Long press: Navigate to parameter menu

Alarm

Short press: Navigates to list of active alarms

Long press while in menu: Reset of alarms

Light Long press: Switches light status

Defrost Long press: Start/stop of a defrost cycles

Bluetooth

Long press: Initiate/Terminate Bluetooth

connection

Star Function can be congured (Not supported yet)

User Guide | Case/room controller (TXV), AK-CC25 Pro and AK-CC25 Pro BT

When a direct-action button is not active, the backlight will increase and decrease in intensity.

When a direct-action button is active, the backlight will be constantly ON.

Conguration mode

When pressing the “SET” button for 1 second, the display will enter the advanced parameter menu, where all parameters

are accessible.

Figure: Display in conguration/parameter mode

Display operation and related settings

The AK-CC25 controller has an authorization system complying with the cybersecurity requirements of the European

Union Radio Equipment Directive (RED 2014/53/EU).

To enforce the highest security level, the controller will prompt the user to set an access code at the rst power up.

Secondly the values of the access codes are protected and the values cannot be readout from any interface once they

have been set - so, remember to note them down and keep them in a safe place. Finally, the controller prevents brute force

attacks by blocking authentication when multiple failed login attempts have been performed.

The required access level for the Bluetooth button as well as the light and defrost buttons can be congured by the

following parameters:

Access levels

AK-CC25 has four access levels, allowing the user to perform dierent actions as shown in the table below:

Access level Authentication Display actions SET Menu – Read

(1)

SET Menu – Write

(1)

L0 - Walk up user No See info-menu

See alarm list

See setpoint

None None

L1 - Store manager Yes Change setpoint

Start temp. pulldown

Switch operation mode

See limited number of

parameters

Start a case cleaning

Set clock

L2 - Service engineer Yes All (except factory reset) See all Change all except

conguration parameters

L3 - Commissioning engineer Yes All See all Change all

Parameter Value Description

q81 BLE Access level 0: Always access

1: Access level 1 required

2: Access level 2 required

3: Access level 3 required

4: Never access / disabled

Access level for start of Bluetooth advertising

q82 Function keys access level 0: Always access

1: Access level 1 required

2: Access level 2 required

3: Access level 3 required

4: Never access / disabled

Common access level for light switch button and defrost start button

(1)

The required read and write level for parameters in the display menu is shown in the display parameter list.

User Guide | Case/room controller (TXV), AK-CC25 Pro and AK-CC25 Pro BT

Access codes

For each access level requiring authentication, a corresponding access code can be congured via the following parameters:

(1)

Note: When an access code is set, the set value will only be read-out for 1 minute, where-after the value is hidden and

the access code will read-out the value 1 to indicate that it has been set. Once the access codes are set, the values cannot

be readout from any interface - so, remember to note them down and place them in a safe place.

The value of the access code set by the user will initially be the access code for all access levels. The user can subsequently

change the individual access codes as mentioned in the paragraph above.

Set access codes at rst power up

At rst power up, the user will be prompted to set an access code, please refer to the screen ow below:

Authentication

The user will always be prompted for selecting a user level (L1/L2/L3) and the corresponding access code, when

performing an action that requires a certain access level - please refer to the example below.

The exception is the AK-CC25 Pro without Bluetooth if the access code for the selected access level is set at 0 – then login

does not require an access code.

Access level Parameter Value

(1)

Description

L1 P88 Access code 1 -1: Has not been set yet

0: No access code required

1: Access code has been set to a

value in the range 1 – 999

Access to daily operational parameters

The option of setting the access code to 0 and thereby removing the

need to login to obtain this user level is only available in the AK-CC25

Pro variant without Bluetooth. For the Bluetooth variant 0 is an access

code and login is required.

L2 o64 Access code 2 -1: Has not been set yet

0: No access code required

1: Access code has been set to a

value in the range 1 – 999

Access to service parameters

The option of setting the access code to 0 and thereby removing the

need to login to obtain this user level is only available in the AK-CC25

Pro variant without Bluetooth. For the Bluetooth variant 0 is an access

code and login is required.

L3 o05 Access code 3 -1: Has not been set yet

0: No access code required

1: Access code has been set to a

value in the range 1 – 999

Full access to all parameters

The option of setting the access code to 0 and thereby removing the

need to login to obtain this user level is only available in the AK-CC25

Pro variant without Bluetooth. For the Bluetooth variant 0 is an access

code and login is required.

Value Description

-1 Access codes have not been set yet. The controller will prompt for setting the access codes again at next power up.

0 For the AK-CC25 Pro without Bluetooth, access code value 0 means the user level can be accessed without having to provide the

access code. For the Bluetooth variant the access code value 0 a normal access code value and login will be required.

1 – 990 All access codes will initially be set at this value and can be changed later

If access codes have not been set, the display will ash between the two rst screens “SEt” and “PS” to indicate that the access codes must

be set. By pressing the “SET” key, the access code values can be set in screen 3. Be aware, all access codes will be set at this value. Once

the access codes are set, the display returns to the normal temperature read out.

User performs a long press on SET to

enter parameter menu.

The user set the value of the

corresponding access code and

presses SET.

The display indicates that

authentication is required by showing

“PS” for 2 sec.

If the provided access code is

correct the action that initiated the

authentication is carried out.

The user selects the access level and

presses SET.

User Guide | Case/room controller (TXV), AK-CC25 Pro and AK-CC25 Pro BT

Failed authentication

If the user enters an invalid access code for a selected user level, the display will show an error code, and the user can retry

entering a new access code, please refer to the screen ow below:

Session logout

An authorization session will be terminated if the display buttons have not been operated for 30 minutes. When a user is

logged in the “Back” button will light up in the direct action mode and a long press on the “Back” button will logout the

user and terminate the authorization session – please refer to the gure below:

However, if three invalid login attempts have been performed, the controller will lock out the user for a period of 1 min. For

every subsequent invalid attempt, the time out period will be extended exponentially to 2 min, 4 min, 8 min and then 8 min

at every next invalid attempt.

If the user tries to perform an action that requires authentication while in lockout, the display will indicate that the

authentication is locked by showing the code “Loc” alternating with a screen showing remaining lockout time in seconds.

After a short time, the display will return to the original screen.

While in lockout period, the user will not be able to perform a new login, and the user will not be able to initiate a new

Bluetooth advertising.

Be aware that the error counter and the time out counter cannot be reset by a power cycle of the controller. Furthermore,

the error counter will only be reset if a user makes a successful login at access level 3 or if a period of 24 hours has elapsed

without any new login sessions.

The user will be prompted to

select user level

While in direct action mode a

long press on “Back” button will

terminate the authorization

session

User provides access code

Display will conrm termination of authorization session by

showing the codes “Log” – “Out”

If the provided access code is

invalid, an error code is shown

After 2 sec the display allows

user to provide a new access

code

If the user performs an action that requires

authentication while in lockout, the display will

indicate this by showing the code “Loc”.

The screen will alternate with a screen

showing the remaining time of the

lockout period

User Guide | Case/room controller (TXV), AK-CC25 Pro and AK-CC25 Pro BT

If the buttons are locked locally, the user can unlock the buttons by “swiping” from left to right on the mid-positioned

buttons, please refer to example below.

The button lock will be re-activated once the user has not operated the buttons for 1 min and the display has returned

to sleep mode. The user can also lock the buttons again manually by “swiping” from right to left on the mid-positioned

buttons.

Figure: Unlock display by swipe from left to right

If a function is protected by keyboard lock

Keyboard is locked

Display will display code “Loc” for 2 sec

While “Loc” code is shown, peforming a

swipe from left to right across the mid-

positioned buttons on the right side of the

display shall unlock the keyboard lock.

If no unlock, then return to previous

display mode

Transition text showing the display

has been unlocked and then return

to the previous display mode in

unlocked condition.

Lock / Unlock of display buttons

The operation of the display buttons can be locked to eliminate the risk that walk-up users interact with the display. The

display lock functionality is selected via the parameter:

If a user presses a button while the keyboard is in locked mode, the display will indicate that it is locked by showing the

code “Loc” in the display.

Parameter Values Description

P89 Display

keyboard lock

0: None The display buttons are not locked

1: Local lock The display buttons will be locked, but can be unlocked locally at the display

2: Network The display buttons will be locked and can only be unlocked via the network system manager

User Guide | Case/room controller (TXV), AK-CC25 Pro and AK-CC25 Pro BT

If the buttons are locked by the network, then the buttons can only be unlocked at the system manager.

Engineering units

The engineering unit of all temperature readouts °C or °F and settings can be selected via the parameter:

Display temperature readout

The main temperature readout can be selected via the parameter:

Figure: Lock display by swipe from right to left

Parameter Value Description

r05 Temperature unit

0: Celcius Temperature values are shown in °C

1: Fahrenheit Temperature values are shown in °F

Parameter Value Description

o97 Display readout

1: Display air A display specic weighted value between S3 and S4 sensors

2: S6 The food product temperature sensor

3: Ther. air The thermostat air temperature

Keyboard is unlocked

While the display is unlocked, performing

a swipe across the touch eld areas on the

middle bottoms of the display from right to

left, shall lock the keyboard lock.

Display will display code “Loc” for

2 sec before returning to previous

display mode in locked mode.

Reset to OEM factory settings

All parameter values can be brought back to the OEM saved values, by performing the following procedure:

Once a reset to factory has been performed, the controller will restart with the OEM factory values.

Figure: Power up controller, and within 1 min, hold the “Up” and “Down” buttons pressed for 5 sec. The display will conrm that the

reset procedure has been recognized by showing the code “FAc” and subsequently the user must select “YEs” or “No”

Factory reset

While in direct action mode, pressing and

holding the Up and Down buttons for 5 sec

shall initiate OEM factory reset procedure.

The display will conrm the factory reset

procedure initiation by showing the text

“Fac” for 1 second and then go to user

conrmation.

Via up and down button select either

“yEs” or “no” and conrm via “SET”

button.

When yes is selected, the controller

reverts to OEM factory settings.

User Guide | Case/room controller (TXV), AK-CC25 Pro and AK-CC25 Pro BT

Figure: Power up sequence of controller

1. All icons and buttons are lit up (2 sec) 2. SW version is read out (1 sec) 3. Display enters direct action mode

All display segments are lit up for sometime

as to be able to check that they all work.

Firmware version is readout, making it

easy to check the rmware version when

needing support.

The power up sequence end in

the display showing the running

temperature read-out in direct action

mode.

List of possible display codes during operation:

Display code Description

Err The temperature cannot be displayed due to a sensor error.

--- Three dashes shown in top – max. value range has been reached.

---

Three dashes shown in middle – Parameter is protected by main switch and cannot be changed until “r12 Main switch” is set in

OFF position.

--- Three dashes shown in bottom - Min. value range has been reached.

Loc The button operation is locked. Unlock by swiping from left to right across the mid-positioned buttons.

UnL The button operation is unlocked

PS A higher-level access code is required for performing action.

Fan A case cleaning procedure is ongoing. The fans are running.

OFF

r12 Main switch has been set in OFF position.

A case cleaning procedure is ongoing – all outputs are in standby mode

SEr r12 Main switch has been set in service mode position for override of outputs

d Defrost is in progress – the code will be shown a set time after the defrost has ended.

FAC The reset to OEM factory procedure has been initiated – select Yes to conrm or No to abort.

OP1 Operation mode 1 has been selected

OP2 Operation mode 2 has been selected

Power up sequence

User Guide | Case/room controller (TXV), AK-CC25 Pro and AK-CC25 Pro BT

Operation via AK-CC Connect App

For AK-CC25 Pro BT with wireless Bluetooth, the controller can be operated via the AK-CC Connect App.

The app can be downloaded from Google Play Store or Apple App Store.

Once the app is installed, initiate the Bluetooth connection by a long press on the Bluetooth button. The display will ash

between the code “Adr” and the network address of the controller.

Google Play Store Apple App store

In the connect screen of the app, press ‘Connect to controller’ and the controller will show up with the network address.

Select the controller from

the list.

Check that the code shown

on display complies with code

in app.

On controller, press SET

button if OK and press Back

button if not. In app, press Pair

if OK and cancel if not.

Select access level and give

in the corresponding access

code and press Done.

If access code is correct, then

the connection is established,

and the dashboard is shown.

If not, the Bluetooth

connection will be

disconnected.

User Guide | Case/room controller (TXV), AK-CC25 Pro and AK-CC25 Pro BT

Figure: AK-CC Connect App screens

Connect screen MenuDashboard Parameter screen

If the access code 3 is set in the controller, the app will prompt for a user level and the corresponding access code to

authenticate the user. If access code 3 is set at the value 0, authentication is disabled and the app will connect without

prompting for access code.

If the provided access code is incorrect the connection will not be established and the Bluetooth advertising from the

controller will stop. The user will need to initiate a new pairing process via the Bluetooth button. Please refer to the

paragraph “Authentication” of how brute force attacks are prevented by locking users out at three failed login attempts.

When selecting the controller, the mobile phone will show a pairing code and the same code is displayed on the controller

via a sequence of three screens, please refer to gure below:

The display indicates that it will show the

pairing code

After 1 sec, the rst three digits of the

pairing code are shown

After 1 sec, the last three digits of the

pairing code are shown

• If the pairing codes do not comply, press the “Back” button to abort connection.

• If the pairing codes do comply with each other, press the SET key on the display and press connect in the app to conrm

the connection

User Guide | Case/room controller (TXV), AK-CC25 Pro and AK-CC25 Pro BT

Label Name Description

r12 Main switch Select the main control mode:

1: Control is started. Critical conguration parameters cannot be changed

0: Control is stopped. Critical conguration parameters can be changed

-1: Control is stopped. Outputs can be controlled manually

o61 Application mode Select one of the 8 pre-congured applications or select the exible application 9, where all IO can be congured

manually

c08 Step control mode Select how two compressors shall be controlled:

1: Sequential control of two compressors on a s single circuit

2: Cyclic control of two compressors on a s single circuit

3: Two individual compressors running on two separate circuits

o03 Network address Modbus network address

Protection of conguration

To start the commissioning of the controller, the main switch parameter “r12 Main switch” must be set in OFF position

(Factory setting).

The main switch parameter “r12 Main switch” is used to start/stop control and put the controller into service mode allowing

for manual override of all outputs. Furthermore, some critical conguration parameters are protected from being changed

while Main switch is in start position.

Quick setup

To get a good start it is recommended to use the quick setup for a fast and easy commissioning of the most essential

conguration parameters. The quick setup is available on the display interface and the Connect APP interface.

On the display, enter the conguration mode by a long press on the “SET” button and the display will show the code “cFg”

for the quick setup menu in the parameter list. Enter the quick setup menu by pressing “SET”.

On the Connect APP the quick setup can be accessed through the burger menu entry on the top right side.

For both interfaces the quick setup contains the following parameters:

Commissioning

User Guide | Case/room controller (TXV), AK-CC25 Pro and AK-CC25 Pro BT

Label Name Description

r05 Temperature unit Engineering unit for temperature values

0: °C, Celsius

1: °F, Fahrenheit

o06 Sensor types Select the type of temperature sensors used:

0: Pt1000

1: PTC1000

2: NTC 5k

3: NTC 10k

4: User dened

r89 Food type Select the food type of the refrigerated produce. When selected, some parameter values will be preset accordingly,

please refer to the table below. After selection, food type will revert to “None”

r00 Cut-out Thermostat cut-out limit

r15 Ther. S4% Weighted value of the S4 sensor for the thermostat air temperature at day operation i.e. 50% means 50% of the S4

sensor and 50% of the S3 sensor

r61 Ther.S4% Ngt Weighted value of the S4 sensor for the thermostat air temperature at night operation i.e. 50% means 50% of the S4

sensor and 50% of the S3 sensor

A36 Alarm S4% Weighted value of the S4 sensor for the temperature alarm monitoring i.e. 50% means 50% of the S4 sensor and 50%

of the S3 sensor

o17 Display air S4% Weighted value of the S4 sensor for the display temperature read-out i.e. 50% means 50% of the S4 sensor and 50%

of the S3 sensor

d01 Def. method Select the defrost method:

0: None, no defrost cycles will be performed

1: Electrical defrost

2: Hot gas defrost

4: Natural defrost – only fans will run to defrost evaporator

5: Pulsing electrical defrost

d03 Def.Interval Maximum time that can pass before a defrost is initiated

d10 DefStopSens. Select the defrost stop method:

0: Time, defrost is terminated when the max defrost time has expired

1: S5, defrost is stopped when S5 sensor reaches the stop limit

2: S4, defrost is stopped when S4 sensor reaches the stop limit

3: S5A and S5B, defrost is stopped when both S5 sensors have reached the stop limit. For a dual circuit application,

the defrost is stopped individually for each circuit

d04 Max Def.time The maximum time a defrost cycle can run before it will be terminated

d02 Def.StopTemp The defrost stop limit – when the selected defrost stop sensor reaches this limit, the defrost is stopped

Setting of presettings (r89).

After setting 1-5, setting is returned to 0.

1 2 3 4 5

Food type Vegetables Milk Meat/sh Frozen food Ice cream

Temperature (r00) 8 °C 0 °C -2 °C -20 °C -24 °C

Max. temp. setting (r02) 10 °C 4 °C 2 °C -16 °C -20 °C

Min. temp. setting (r03) 4 °C -4 °C -6 °C -24 °C -28 °C

Upper alarm limit (A13) 14 °C 8 °C 8 °C -15 °C -15 °C

Lower alarm limit (A14) 0 °C -5 °C -5 °C -30 °C -30 °C

Upper alarm limit for S6 (A22) 14 °C 8 °C 8 °C -15 °C -15 °C

Lower alarm limit for S6 (A23) 0 °C -5 °C -5 °C -30 °C -30 °C

Once the elementary quick settings have been provided, the unit can be started by setting r12 Main switch in ON position,

however it is recommended to check the rest of the settings before doing so.

Table: Food type setting and related preset values

User Guide | Case/room controller (TXV), AK-CC25 Pro and AK-CC25 Pro BT

Functions summary

• Single refrigeration circuit with single or dual compressor

• Dual refrigeration circuits with individual compressors

• Modulating temperature control via capacity control of variable speed compressor

• Variable speed control via frequency signal

• Oil return management for extended lifetime of VSC compressor

• Resonance avoidance range for eliminating mechanical noise from unit

• Temperature and operational performance monitoring

• Safety monitoring of condenser temperature and compressor safety chain with option of lock-out if safety limits are

violated repeatedly

• Switch between MT and LT operation modes via digital input or display

• Start of defrost via schedule, runtime, digital input, network or setting display

• Natural, electrical, hot gas or pulsing electrical defrost

• Stop of defrost on time and/or temperature

• Coordination of defrosting among several controllers in a line-up

• Pulsing control of fans when thermostat is satised

• Appliance cleaning function for documentation of HACCP procedure

• Rail heat control via day/night load or dew point

• Door function and alarm monitoring

• Light control according to schedule, door signal or network signal

• Heating thermostat

• High accuracy inputs guaranteeing a better measuring accuracy than stated in the standard EN ISO 23953-2 without

subsequent calibration (Pt1000 ohm sensor)

• Integrated MODBUS communication

Functions and features

Applications

The general wiring diagram of the AK-CC25 controller is shown below:

Overall, the hardware features the following IO:

• 4 digital outputs

• 2 digital inputs

• 4 analogue inputs (AI4 is mutual exclusive with DI1)

• 1 Analogue output (AO1 is mutual exclusive with DI2)

A+

B-

A+

B-

Modbus

1 2 3 4

DO1 DO2

Option

card

18 19 20

DI2

AO1

DI1

AI4

DI1 DI2

21 22 23 24

A+ B-

Danfoss

80G8707

15 16 17

AI2 AI3

S4 S5

120 – 230 V AC

5 6 7

DO4

10 11 128 9

DO3

13 14

AI1

User Guide | Case/room controller (TXV), AK-CC25 Pro and AK-CC25 Pro BT

The AK-CC25 controller has 9 application modes. For the application modes 1-8, most of the input and output functions

are pre-dened making it fast and foolproof to congure the controller. However, application 9 oers a fully exible IO

conguration where all input and output functions can be dened by the user, please refer to the table below for further

details.

The application mode is set via the parameter:

The selection gives the following IO congurations:

Table: Overview of application modes and IO conguration

Applications 1-4

These are typical applications for a single refrigeration circuit with on/o or variable speed compressor. To use a variable

speed compressor the analogue output AO1 must be set for compressor speed control.

Applications 5-8

These are applications for either a single refrigeration circuit with dual on/o compressors or for a cabinet with two individual

refrigeration circuits each having an on/o compressor. Which of the applications is decided by the parameter c08:

Application 9

For this exible application mode, the function of all inputs and outputs can be dened individually.

Digital outputs:

For the four digital outputs the function is selected via the parameters:

• The Input /Output function can be freely congured.

AI4/DI1 can be used for sensor signals or digital input signals

AO1/DI2 can be used for compressor speed signal (Hz) or digital input signals

Parameter Description

o61 Application mode Selection of application mode as per table above

Parameter Description

c08 Step control mode

1: Single refrigeration circuit with sequential control of two compressors (FILO)

2: Single refrigeration circuit with cyclic control of two compressors (FIFO)

3: Dual refrigeration circuits, each having an on/o compressor

Parameter Description

q01 DO1 Conguration

Select function for DO1 output

q02 DO2 Conguration

Select function for DO2 output

q03 DO3 Conguration

Select function for DO3 output

q04 DO4 Conguration

Select function for DO4 output

Application

DO1

SPST

DO2

SPDT

DO4

SPDT

AI1 AI2 AI3

AI4

DI1

AO1

DI2

Modbus

S3 S4 S5 Built-in

S3 S4 S5 Sc Built-in

S3 S4 S5 Built-in

Built-in

DO3

SPST

1 Standard case MT/LT (Alarm)

2 Standard case MT/LT (Light)

3 Standard case MT/LT (Rail heat)

4 Case with condenser fan ctrl

5 Dual comp. with alarm

6 Dual comp. with light

7 Dual comp. with rail heat

8 Dual comp. with fan

9 Flexible case

cond

User Guide | Case/room controller (TXV), AK-CC25 Pro and AK-CC25 Pro BT

Table: Selectable digital output functions

If the analogue input AI4 is congured for a function, DI1 will not be available.

If the analogue output AO1 is congured for a function, then DI2 will not be available.

Parameter Description

o02 DI1 Conguration

Select function for DI1 input

o37 DI2 Conguration

Select function for DI2 input

Value Function

0 None

1 Fan

3 Defrost A

4 Rail heat

5 Alarm

6 Light

8 Compressor/LLSV

9 Compressor 2

10 Air heater

12 Condenser fan

13 Drain heater

14 Defrost B

Value Function DI1

DI2

0 None x x

1 DI status only x x

2 Door function (stop of refrigeration and fans) x x

3 Door alarm x x

4 Defrost start x x

5 Main switch x x

6 Night setback x x

8 Alarm at closed x x

9 Alarm at open x x

10 Case cleaning x x

11 Forced cooling x x

13 Co-ordinated defrost x

15 Shutdown x x

16 Light control x x

20 Leak detection x x

24 Compressor 1 safety x x

29 Door fans stop x x

31 Compressor 2 safety (only used at dual circuits) x x

32 Temperature pulldown – quick freeze x x

33 Operation mode (MT/LT) x x

Hints:

It is recommended to use DO1 for compressor start/stop as

this relay has the highest current ratings.

If AO1 is used for a variable speed compressor and it

supports stopping the compressor via the frequency signal,

then a digital output can be left out for start and stop of the

compressor.

It is recommended to congure the alarm and light

functions on the digital outputs with double contact set

(DO2 or DO4) as they must be connected to the NO contact,

so that the light will be switched ON and an alarm will be

raised if the power to the controller should fail.

Digital inputs:

For the two DI inputs DI1 and DI2, the function is selected via the parameters:

User Guide | Case/room controller (TXV), AK-CC25 Pro and AK-CC25 Pro BT

Analogue output

For the single AO output, the function is selected via the parameter:

A variable speed compressor can only be dened for a single compressor application. If two compressors have dened the

analogue output cannot be congured for variable speed control.

Analogue inputs

For the four analogue inputs, the functions are selected via the parameters:

Handling of illegal IO congurations

If an illegal IO conguration has been made, a “Wrong IO cong” alarm will be raised, and the control cannot be started.

If the controller has been set up for using a specic sensor and the sensor has not been congured, a “Wrong IO cong”

alarm will be raised and a sensor alarm will be raised for the missing sensor.

Please refer to Appendix A for further details on illegal IO congurations.

Table: Selectable analogue output functions

Table: Selectable analogue input functions

If the analogue output AO1 is congured for a function, then DI2 will not be available.

If the analogue input AI4 is congured for a function, DI1 will not be available.

Parameter Description

q09 AO1 Conguration

Select function for AO1 output

Parameter Description

q60 AI1 Conguration Select function for AI1 input

q61 AI2 Conguration Select function for AI2 input

q62 AI3 Conguration Select function for AI3 input

q63 AI4 Conguration

Select function for AI4 input

Value Function

0 None

3 Variable speed compressor

Value Function

0 None

3 S3 Air ON evap. (before evaporator)

4 S4 Air OFF evap. (after evaporator)

5 S5A Evaporator sensor

6 S6 Product sensor

10 S5B Evaporator sensor

15 Sc Condenser sensor

User Guide | Case/room controller (TXV), AK-CC25 Pro and AK-CC25 Pro BT

Wiring diagrams for the 8 pre-dened congurations is provided here:

Wiring diagrams

Application 1 Application 2

1 2 3 4

DO1 DO2

Option

card

18 19 20

DI2

AO1

DI1

AI4

DI1 DI2

21 22 23 24

A+ B-

Modbus

0 – 200 Hz

Danfoss

80G8707

15 16 17

AI2 AI3

S4 S5

120 – 230 V AC

5 6 7

DO4

10 11 128 9

DO3

13 14

AI1

1 2 3 4

DO1 DO2

Option

card

18 19 20

DI2

AO1

DI1

AI4

DI1 DI2

21 22 23 24

A+ B-

Modbus

0 – 200 Hz

Danfoss

80G8708

15 16 17

AI2 AI3

S4 S5

120 – 230 V AC

5 6 7

DO4

10 11 128 9

DO3

13 14

AI1

Application 3 Application 4

1 2 3 4

DO1 DO2

Option

card

18 19 20

DI2

AO1

DI1

AI4

DI1 DI2

21 22 23 24

A+ B-

Modbus

0 – 200 Hz

Danfoss

80G8709

15 16 17

AI2 AI3

S4 S5

120 – 230 V AC

5 6 7

DO4

10 11 128 9

DO3

13 14

AI1

1 2 3 4

DO1 DO2

Option

card

18 19 20

DI2

AO1

DI1

AI4

DI1 DI2

21 22 23 24

A+ B-

Modbus

0 – 200 Hz

Danfoss

80G8710

15 16 17

AI2 AI3

S4 S5

120 – 230 V AC

5 6 7

DO4

10 11 128 9

DO3

13 14

AI1

Application 5 Application 6

1 2 3 4

DO1 DO2

Option

card

18 19 20

DI2

AO1

DI1

AI4

DI1 DI2

21 22 23 24

A+ B-

Modbus

Danfoss

80G8711

15 16 17

AI2 AI3

S4 S5

120 – 230 V AC

5 6 7

DO4

10 11 128 9

DO3

13 14

AI1

1 2 3 4

DO1 DO2

Option

card

18 19 20

DI2

AO1

DI1

AI4

DI1 DI2

21 22 23 24

A+ B-

Modbus

Danfoss

80G8712

15 16 17

AI2 AI3

S4 S5

120 – 230 V AC

5 6 7

DO4

10 11 128 9

DO3

13 14

AI1

*Note: Each AI/DI/AO signal must have a separate ground wire.

User Guide | Case/room controller (TXV), AK-CC25 Pro and AK-CC25 Pro BT

Application 7 Application 8

1 2 3 4

DO1 DO2

Option

card

18 19 20

DI2

AO1

DI1

AI4

DI1 DI2

21 22 23 24

A+ B-

Modbus

Danfoss

80G8713

15 16 17

AI2 AI3

S4 S5

120 – 230 V AC

5 6 7

DO4

10 11 128 9

DO3

13 14

AI1

2 1

1 2 3 4

DO1 DO2

Option

card

18 19 20

DI2

AO1

DI1

AI4

DI1 DI2

21 22 23 24

A+ B-

Modbus

Danfoss

80G8714

15 16 17

AI2 AI3

S4 S5

120 – 230 V AC

5 6 7

DO4

10 11 128 9

DO3

13 14

AI1

Application 9

1 2 3 4

DO1 DO2

Option

card

18 19 20

DI2

AO1

DI1

AI4

21 22 23 24

A+ B-

Modbus

Danfoss

80G8715

15 16 17

AI2 AI3

120 – 230 V AC

5 6 7

DO4

10 11 128 9

DO3

13 14

AI1

Special wiring details

Variable speed compressor

In applications 1-4 and 9., the analogue output AO1 can be set up for a variable speed compressor. The analogue output

will provide a frequency signal for control of the VSC on terminals 18 – 20.

Warning: The ground wire of frequency signal shall be separate from the ground wire of DI1/AI4 signal.

1 2 3 4

DO1 DO2

Option

card

18 19 20

DI2

AO1

DI1

AI4

21 22 23 24

A+ B-

Frequency

0 – 200 Hz

Danfoss

80G8724

15 16 17

AI2 AI3

S4 S5

120 - 230 V AC

5 6 7

DO4

10 11 128 9

DO3

13 14

AI1

User Guide | Case/room controller (TXV), AK-CC25 Pro and AK-CC25 Pro BT

Installation considerations

Accidental damage, poor installation, or site conditions can give rise to malfunctions of the control system, and ultimately

lead to a plant breakdown.

Every possible safeguard is incorporated into our products to prevent this. However, a wrong installation could still present

problems. Electronic controls are no substitute for normal, good engineering practice.

Danfoss will not be responsible for any goods, or plant components, damaged as a result of the above defects. It is the

installer’s responsibility to check the installation thoroughly, and to t the necessary safety devices.

Your local Danfoss agent will be pleased to assist with further advice, etc.

For security reasons the connection terminals and cable runs of the Modbus data communication cable shall be placed in

physical restricted area, where only authorized personnel has access.

Electric noise

Cables for sensors, low voltage DI inputs and data communication must be kept separate from other electric cables:

• Use separate cable trays

• Keep a distance between cables of at least 10 cm

• Long cables at the low voltage DI input should be avoided

Max. 10

The following controllers can be connected in this way:

EKC 204A, AK-CC 210, AK-CC 250,

AK-CC 450, AK-CC 550 and AK-CC55.

Refrigeration is resumed at the same time when all controllers have terminated

defrost.

Coordinated defrost via cable connections

Data communication

It is important that the installation of data

Communication cable is performed correctly

With sucient distance to high voltage cables.

For more information, refer the Communications Design Guide.

A+

B-

A+

B-

Danfoss

80G8716

Option

card

Modbus

21 22 23 24

A+ B-

18 19 2015 16 1713 14

User Guide | Case/room controller (TXV), AK-CC25 Pro and AK-CC25 Pro BT

Technical data

Mechanical

Enclosure Self-extinguishing polycarbonate

Environmental conditions

Ingress protection Panel mounting with xing mounting brackets

EN: Front IP65, Back IPX0

UL: Type 1

Operating temperature -20 – 55 °C; 20 – 80 rH% (non-condensing humidity)

Storage temperature -40 – 70 °C; 20 – 80 rH% (non-condensing humidity)

Electrical specications

Purpose of control Operating refrigeration controller

Power supply 100 – 240 V AC

Power consumption 3 V A

Frequency 50/60 Hz

Terminal blocks L, N, DO1, DO2, DO3, DO4

Removable male-female 12 – 24 AWG / 0.34 – 2.5 mm

AI1-AI3, DI1-DI2

Removable male-female 16 – 28 AWG / 0.081 – 1.5mm

Modbus:

Removable male-female 16 – 28 AWG / 0.081 – 1.5 mm

Rated impulse voltage 2500 V

Overvoltage category II

Construction of control Incorporated control

Environmental pollution

class

User interface

Display 3 digits, decimal point and multifunction icons

Keypad 10 backlit capacitive touch buttons

Status icons 3 backlit icons

Connectivity

Bluetooth Bluetooth Low Energy ver. 5.1, Max distance 10 m, variable according to the mobile device used

Fieldbus RS-485 Transceiver octal load. (allows up to 256 units), Non isolated

Speed: up to 115.2 kbps, Fail safe: means accept 0 V on bus line, Cable length: ≤1200 m

Analogue inputs (AI1-AI4)

Sensor types Pt1000, (AKS 11, AKS 12, AKS 21)

PTC 990 Ohm at 25 °C

NTC 5K Ohm at 25 °C, (EKS 211)

NTC 10K Ohm at 25 °C, (EKS 221)

User dened type

Measuring range Pt1000: -60 – 120 °C

PTC1000: -60 – 80 °C

NTC 5K: -40 – 80 °C

NTC 10K: -40 – 120 °C

User dened type: 400 – 200k ohm

Note: Each AI/DI/AO signal must have a separate ground wire.

Accuracy Pt1000: ±0.5 K

PTC 1000: ±0.5 K

NTC 5K: ±0.5 K

NTC 10K: ±0.5 K

Digital inputs (DI1-DI2)

DI1 Dry contact, Open loop. 3.3 V DC, Contact current. 2.2 mA

DI2 Dry contact, Open loop. 12 V DC, Contact current. 3.5 mA

OBS: Defrost co-ordination: Max 5 Controllers in parallel, Max 100 m cable total.

User Guide | Case/room controller (TXV), AK-CC25 Pro and AK-CC25 Pro BT

Analogue output (AO1)

AO1 Frequency: 0 – 200 Hz (Min. 0 V and Max. 12 V), Source: 20 mA, Sink: -25 mA, cable length < 30 m

Digital outputs (DO1-DO4)

Terminals / Action type Load type EN Ratings UL ratings

DO1, 3-4 (NO)

DO2, 5-6-7 (NO/NC)

Type 1.B

Resistive

NC/NO: 10 A, 240 V AC NC/NO: 10 A Resistive 240 V AC

Motor compressor DO1: 10A (cos ф= 0.6), 240 V AC

DO1/DO2: 3.5A (cos ф = 0.4), 240 V AC

NO: 1 1/2 HP or 10FLA/60LRA 240 V AC

NC/NO: 1/2 HP 125 V AC

NC/NO: 1HP 240 V AC

Inductive

Not rated for this load type NO: Pilot duty: B300

Incandescent lamp Not rated for this load type DO1: NO: TV-5, 125 V AC

DO2: NO: TV-5, 240 V AC

DO3, 8-9 (NO)

DO4, 10-11-12 (NC/NO)

Type 1.B

Resistive

NC/NO: 6A Resistive, 240 V AC NC/NO: 6A Resistive, 240 V AC

Motor compressor

NC/NO: 3A (Cos ф 0.4), 240 V AC 1/4 HP 125/240 V AC

Inductive

NC/NO: 6(4), 240 V AC NC/NO: Pilot duty: B300

Incandescent lamp

Not rated for this load type NO: TV-4, 120/240 V AC

Others

5 V DC Supply

Supply for external

accessories

Total load from all external accessory: max 50 mA, Cable length: ≤3 m

Real time clock Accuracy. typ. 20 ppm, 10 min/year, Back-up time 4 days

Conformity

LVD directive and UL

certication

2014/35/EU - IEC/EN 60730-1, IEC/EN 60730-2-9, IEC/EN 60335-1, IEC/EN 60335-2-89, IEC/EN 60335-2-24,

IEC/EN 60335-2-40

UL/CSA 60730-1, UL/CSA 60730-2-9, UL/CSA C22.2 60335-2-89, UL/CSA C22.2 60335-2-24, UL/CSA C22.2

60335-2-40

EMC directive 2014/30/EU - EN 61000-6-2, EN 61000-6-3, ETSI EN 301 489-1, ETSI EN 301 489-17

Flammable refrigerants

Approved for use in

Zone 2 (gases 2one) as

per20l4/34/EU ATEX direc-

tive

Compliance with the following requirements of the IEC/EN/UL/ CSA 22.2 No. 60335-2-xx standards:

• Components that produce sparks during normal operation have been tested for enclosed break “dC”

device as per IEC/EN 60079-1 :2014 and for seal tight “nC” device tested according to IEC/EN 60079-

15:2019, which meets requirement of Annex BB of IEC/EN 60335-2-89, Annex CC of IEC/EN 60335-2-24

and Annex JJ of 60335-2-40

• Hot spots measured as per Clause 22.114DV D2 of UL / CSA 22.2 No. 60335-2-89, clause 22.110 of UL /

CSA 22.2 No. 60335-2-24, Clause 22.117 of UL / CSA 22.2 No. 60335-2-40

• IEC/EN 60335-2-89 clauses 8, 11, 13, 15, 16, 17, 19, 21, 22, 24, 29, 30 and Annex BB for commercial

refrigeration appliances.

• IEC/EN 60335-2-24 clauses 8, 11, 13, 15, 16, 17, 19, 21, 22, 24, 29, 30 and Annex CC for household

refrigerator appliance.

• IEC/EN 60335-2-40 clauses 8, 11, 13, 15, 16, 17, 19, 21, 22, 24, 29, 30 and Annex JJ for Electrical Heat

Pumps, Air-Conditioners.

• Complementary le LZGH2/8 (Flame Arrest-protected Components for Use in Refrigeration and Air-

Conditioning Equipment Employing A2L Refrigerants).

Wireless - RED Directive

and FCC/ISED approval

2014/53/EU – ETSI EN 300 328, EN 50663:2017.

FCC 47 CFR Part 15 Sub-part C & B, FCC CFR 47 Pt 1.1307 and ISED RSS-247 and ISED RSS-GEN, ICES-003,

ISED RSS-102

User Guide | Case/room controller (TXV), AK-CC25 Pro and AK-CC25 Pro BT

To start the commissioning of the controller, the main switch parameter “r12 Main switch” must be set in OFF position

(Factory setting).

The main switch parameter “r12 Main switch” is used to start/stop control and put the controller into service mode allowing

for manual override of all outputs. Furthermore, some critical conguration parameters are protected from being changed

while Main switch is in start position.

Temperature control

Thermostat temperature

The temperature in the appliance is registered by one or two temperature sensors located in the return air before the

evaporator (S3) or after the evaporator (S4) respectively.

The thermostat air temperature is based on a weighted percentage value between the S3 sensor and S4 sensor. A setting

determines how much the S4 sensor shall weigh in the thermostat air temperature e.g. if the S4 weight is set to 30%, then

the S3 weight is 70%.

If a night cover or night curtains are used, then a separate weighted percentage value can be set for night operation.

A digital input can also be set up for main switch function and thereby start/stop of control.

Main switch

Functions

Parameter Value Description

r12 Main switch -1:

Manual control of outputs can be performed

Stop of control

Start of control

Parameter Value Description

r15 Thermostat sensor S4% 0 – 100%

Weight of S4 sensor in thermostat air temp. during day

r61 Thermostat sensor S4% night 0 – 100%

Weight of S4 sensor in thermostat air temp. during night

u17 Ther. air

Actual thermostat air temperature

Sensor Description

Return air temperature

Supply air temperature

Danfoss

80G8727

Virtual

thermostat

Air

User Guide | Case/room controller (TXV), AK-CC25 Pro and AK-CC25 Pro BT

Thermostat control

The temperature control is based on a thermostat cut-out setpoint and a dierential.

When using on/o compressors, the compressor is cut-out when the thermostat air temperature reaches the set cut-out

limit and will be started again when the thermostat air temperature has increased with the set dierential, please refer to

the gure below.

When using a variable speed compressor, the capacity of the compressor is adapted to keep the temperature at the mid-

point between the cut-in and cut-out limits.

The actual cut-in time of the thermostat and the actual working cut-in and cut-out temperature limits of the thermostat

can be read-out.

To prevent that the thermostat setpoint is adjusted too much, the setting range of the cut-out limit can be limited via the

parameters:

Figure: Temperature control with on/o compressors

Figure: Temperature control with variable speed compressor

Parameter Value Description

r00 Cut-out 1 -60 – +50 °C

Set point for thermostat cut-out

r01 Dierential 0.1 – 20 K

Temperature dierential for thermostat

r14 Thermostat mode Read-out

1: ON/OFF control

2: Modulating control with variable speed compressor

u90 Ther. cut-in temp. °C

Actual cut-in limit for thermostat

u91 Ther. cut-out temp. °C

Actual cut-out limit for thermostat

u18 Ther. run time A min

Actual/last runtime of thermostat

Parameter Value Description

r02 Max cut-out limit -60 – +50 °C

Maximum setting range for cut-out temperature

r03 Min cut-out limit -60 – +50 °C

Minimum setting range for cut-out temperature

Di

erential

Cut-in

Cut-out

Ref

Temp °C

Danfoss

80G8743

Danfoss

80G8747

Cut-in

Ther. air

Cut-out

hermostat

state

Dierential

User Guide | Case/room controller (TXV), AK-CC25 Pro and AK-CC25 Pro BT

Emergency control

In case the thermostat control sensor becomes defective, the temperature control will go into an emergency control state,

where the temperature is controlled based on a control pattern learned during normal control.

For on/o compressors, the thermostat will operate with the registered ON/OFF duty cycle during day and night operation.

For a variable speed compressor, the compressor will run with a capacity registered during day and night operation.

Night setback

In refrigeration appliances there may be big load dierences between the shop’s opening and closing hours, especially

if night lids/blinds are used. The thermostat reference may be raised here without it having any eect on the product

temperature.

Change-over between day and night operation can take place as follows:

• Via an internal night event schedule

• Via an external switch connected to a digital input.

• Via a network signal from the system manager

Night event schedule

Two daily scheduled events can be dened and associated to dierent weekdays. For each event, the user shall be able

to dene a time for opening of the store (daytime) and a time for closing of the store (Nighttime). Besides these two

scheduled events, the user can select pre-dened events for a full day closed and a full day open.

For each weekday, the user shall be able to dene which event that applies to the weekday in question - either “Open all

day”, “Closed all day”, “Event 1” or “Event 2”.

Figure: Night oset via a digital input signal

Parameter Value Description

r13 Night oset -50 – +50 °C

Thermostat night oset

u13 Night condition Read-out

State of night operation

Parameter Value Description

t58 Event 1 Day 0 – 23 Hours

Event 1 - Start of daytime - Hours

t59 Event 1 Day 0 – 59 min

Event 1 - Start of daytime - Min

t60 Event 1 Day 0 – 23 Hours

Event 1 - Start of night-time - Hours

t61 Event 1 Day 0 – 59 min

Event 1 - Start of night-time - Min

t62 Event 2 Day 0 – 23 Hours

Event 2 - Start of daytime - Hours

t63 Event 2 Day 0 – 59 min

Event 2 - Start of daytime - Min

t64 Event 2 Day 0 – 23 Hours

Event 2 - Start of night-time - Hours

t65 Event 2 Day 0 – 59 min

Event 2 - Start of night-time - Min

t66 Monday event 0: Open all day

1: Closed all day

2: Event 1

3: Event 2

Select event for Monday

t67 => t72 As above

Select daily events for Tuesday to Sunday

User Guide | Case/room controller (TXV), AK-CC25 Pro and AK-CC25 Pro BT

Example:

Event 1

Daytime 08:00

Night-time 16:00

Event 2

Daytime 09:00

Night-time 20:00

Monday to Friday: Event 1

Saturday: Event 2

Sunday: Night all day

Based on the above, the weekly night schedule will be as shown in the gure below.

Figure: Weekly night schedule based on dened events

Frost protection

In some type of cabinets, there is a risk of freezing up food stu stored at the back of the shelfs and the frost protection

feature eliminates this risk.

If the measured S4 air o evap. temperature decreases below the set frost limit, refrigeration is stopped immediately and

the S4 air o evap. temperature must increase with 2K above the set frost limit for refrigeration to be resumed, please refer

to the gure below.

Temperature pulldown – quick freeze

When loading a cabinet with warm goods, the air temperature in the cabinet/Cold room will increase and it will take some

time for the goods to reach the ideal storage temperature. To minimize the time for the goods to reach the ideal storage

temperature, the user shall be able to initiate a temperature pulldown cycle where the air temperature for a period is

cooled to a lower level than during normal thermostat control

The frost protection function is enabled by setting the frost protection limit to a value higher than the default value of -60 °C.

Figure: Frost protection eliminates the risk of freezing up stored

food as cooling is stopped at frost protection limit

Parameter Value Description

r98 S4 frost protection -60 – 50 °C

Frost protection limit where cooling is stopped

Danfoss

80G8748

S4 Air o temp.

S4 frost limi

Temp. ˚C

Thermostat

state

2 K

Danfoss

80G8749

MonTue WedThu FriSat Sun

8 16 24 8 16 24 8 16 24 8 16 24 8 16 24 8 16 24 8 16 24

Night Day

User Guide | Case/room controller (TXV), AK-CC25 Pro and AK-CC25 Pro BT

Heating thermostat

The heating thermostat is enabled by dening one of the digital outputs for air heater control. The heating function is used

to prevent the temperature from becoming too low, e.g. in a cold room, etc. The limit for when the heating function cuts o

is set as an oset value below the current cut-out limit for the refrigeration thermostat. This ensures that refrigeration and

heating do not occur simultaneously. The dierence for the heating thermostat has the same value as for the refrigeration

thermostat. To prevent that the heating thermostat cuts in during short-term drops in air temperature, a time delay can be

set for when to change from refrigeration to heating.

A temperature pulldown cycle can be initiated via:

• A toggle switch signal on a digital input

• A direct-action function (“Pdt”) in the info menu of the display

• After a defrost cycle to bring down the goods temperature quickly

When a pulldown cycle is initiated the thermostat cut-out value will be oset with set pulldown temperature dierential

compared to the actual thermostat cut-out value. So, during a pulldown cycle the thermostat will run with a lower setpoint

for a set pulldown time. When the set pulldown time expires, the pulldown cycle is terminated even if the pulldown

temperature has not been reached and the thermostat will revert to the normal cut-out value for temperature control,

please refer to gure below.

Parameter Value Description

ra1 Temp. pulldown di -50 – 0 °C

Temperature dierential for pulldown

ra2 Temp. pulldown time 0 – 300 min

Duration of temperature pulldown

d44 Pulldown after defrost No/Yes

Perform pulldown after a defrost cycle

Parameter Value Description

r62 Air heater neutral zone 0 – 50 °C

Neutral zone between cooling and heating zones

r63 Air heater start delay 0 – 240 min

Delay for start of rst heating cycle

u84 Air heater OFF/ON

Readout of air heater status

Figure: Temperature pulldown cycle

Figure: Heating is started when the temperature has dropped the set neutral zone and dierential below the cooling thermostat

cut-out limit

Danfoss

80G8750

Time

Cut-in

t-out

Temp ˚C

Pulldown

terminated

Pulldown

initiated

Pulldown

time

Pulldown

dierential

Danfoss

80G8751

Cooling

Heating

Cut-in

Cut-out

Cut-in

Dierential

Neutral zone

User Guide | Case/room controller (TXV), AK-CC25 Pro and AK-CC25 Pro BT

Melt function

This function will prevent the air ow in the evaporator from being reduced by large ice crystals created on the evaporator

ns by uninterrupted operation for a long time e.g. at variable speed compressor. The function is activated if the

thermostat air temperature has remained in the range between -5 °C and +10 °C for a longer period than the set melting

interval. The refrigeration will then be stopped during the set melting period. The frost will be melted so that the air ow

and hence the evaporator’s capacity will be greatly improved. This also allows for longer intervals between required defrost

cycles.

Food temperature and product sensor

Several sensors can be selected to represent the temperature of the refrigerated goods.

A separate optional product sensor S6, which can be congured on one of the analogue inputs, can also be used and can

Temperature alarm monitoring

Just as is possible for the thermostat, the alarm monitoring can be set with a weighting between S3 and S4 so that you can

decide how much the two sensor values should inuence the alarm monitoring. Minimum and maximum limits can be set

for alarm temperature and time delays. A longer time delay can be set for high temperature alarm at pulldown conditions

like after defrosting, after appliance cleaning and after start-up.

Switch operation mode – Plugin for MT and LT

Some refrigerated plug-in cabinets are designed so that they can switch between operation modes for respectively

medium temperature food and low temperature food. These types of cabinets can usually be moved around in the store

and placed at the most convenient place to present food for sale. When loading the cabinet with a food type category, the

user will set the operation mode of the cabinet via a key switch placed on the cabinet. When switching operation mode,

the controller will adapt the controller conguration accordingly to tune the control to the two dierent operation modes

e.g. temperature set point, alarm limits, compressor operation modes, variable compressor PI control, defrost schedules

etc.

The controller oers the option to store two OEM operating sets of parameters for respectively MT and LT operation. The

operating sets can be programmed via the desktop application “KoolProg” and can be adapted in the eld by copying the

actual working set of parameters to one of the two OEM operating sets.

Parameter Value Description

r16 Melt interval 0 – 10 hours

Interval between melt periods if cooling is running constantly

r17 Melt period 0 – 30 min

Duration of melt period

Parameter Value Description

q39 Food temp. sensor 1: Thermostat air

2: Alarm air

3: S3 Air ON sensor

4: S6 Product sensor

Interval between melt periods if cooling is running constantly.

Select temperature sensor/value representing the food temperature.

U72 Food temperature °C

Readout of selected sensor value

u36 S6 product temp. °C

Readout of product sensor value

Parameter Value Description

A36 Alarm sensor S4% 0 – 100%

Weight of S4 sensor in alarm air temp.

A13 High alarm limit -60 – 50 °C

High alarm limit

A14 Low alarm limit -60 – 50 °C

Low alarm limit

A03 Alarm delay 0 – 240 min

Alarm delay at normal control

A12 Alarm delay pull down 0 – 240 min

Alarm delay at pulldown conditions

u57 Alarm air temp. °C

Readout of weighted alarm temperature

y10 High alarm limit °C

Readout of actual high alarm limit

Y11 Low alarm limit °C

Readout of actual low alarm limit

User Guide | Case/room controller (TXV), AK-CC25 Pro and AK-CC25 Pro BT

The OEM operating set can be selected via the following options:

• Selecting the OEM operating set via the function “oPS” in the direct-action menu of the display (placed in info menu)

• Switching OEM operating set via a digital input signal

If a digital input is used for changing OEM operating set, the direct-action function cannot be used.

Be aware, when an OEM operating set is selected, the parameter values of this OEM operating set will be transferred to the

actual working set of the controller and thereby overwrite the values in the working set.

The parameter values of the actual working set can be transferred back to one of the OEM operating sets via a parameter,

allowing to adapt the OEM operating set values in the eld.

Compressor control

ON/OFF control of a single compressor

When only one compressor relay is congured, the compressor is started when the thermostat air temperature reaches the

thermostat cut-in value and stopped when the temperature reaches the cut-out value.

ON/OFF control of two compressors - single refrigeration circuit

Two compressors can be controlled cyclic or sequentially. At cyclic control, the two compressors must be of the same size,

while in sequential control compressor 1 can be larger than compressor 2.

Parameter Value Description

OPS - Switch operation mode 0: None

1: OEM set 1

2: OEM set 2

Direct action function in display “Info” menu

q58 Manage operation modes 0: None

1: Copy to OEM set 1

2: Copy to OEM set 2

3: Erase OEM sets

Copy actual working set to an OEM set

ua1 Operation mode 0: None

1: OEM set 1

2: OEM set 2

Readout of OEM set in use

Figure: When an OEM working set is selected by a digital input, the OEM parameter values will be transferred to the actual working

set, adapting the control to respectively LT and MT operation

Danfoss

80G8752

Working set

current values

OEM Set 1OEM Set 2

DI Closed DI Open

User Guide | Case/room controller (TXV), AK-CC25 Pro and AK-CC25 Pro BT

Cyclic control

When the controller demands refrigeration, it will rst cut in the compressor with the shortest operating time. After the

time delay, the second compressor will be cut in. When the temperature has dropped to ”the middle of the dierential”, the

compressor with the longest operation time will be cut out. The running compressor will continue until the temperature

has reached the cut-out value. Then it will cut out. When the temperature again reaches the middle of the dierential, a

compressor will again be started. If one compressor cannot maintain the temperature within the dierential, the second

compressor will also be started. If one of the compressors has run on its own for two hours, the compressors will be

changed over so that operational time is balanced. The two compressors must be of a type that can start up against a high

pressure.

Sequential control

Compressor steps are controlled in the same manner as described for cyclic control, but compressor step 1 will always be

started rst and cut out as the last one. No time equalization is available in sequential control mode.

ON/OFF control of two compressors – Independent refrigeration circuits

When a case has two independent refrigeration circuits, each having a single on/o compressor, both compressors will be

started at the same time, with a short time delay between them and they will stop at the same time.

Parameter Value Description

c08 Step control mode 1: Sequential

2: Cyclic

3: Dual circuits

For one refrigeration circuit, select either cyclic (FIFO) or sequential (FILO) control

When having two independent refrigeration circuits, select dual circuits.

Figure: Control of two on/o compressors in two independent refrigeration circuits

Figure: Capacity control of two compressors on same refrigeration circuit

Danfoss

80G8753

Temp. ˚C

Di

erential

Cut-out

Cut-in

Step

delay

Danfoss

80G8754

Temp. ˚C

Step

delay

Step

delay

Di

erential

Cut-out

Cut-in

User Guide | Case/room controller (TXV), AK-CC25 Pro and AK-CC25 Pro BT

Variable speed compressor

Speed control

Variable speed control is enabled when the analogue output AO1 is congured for a variable speed compressor. The speed

of the VSC will be controlled via a frequency signal on AO1. The speed of the VSC compressor will be controlled, so that the

air temperature is kept at the mid-point between the cut-out and cut-in value.

Variable speed control can only be used for a single compressor application.

The gure below shows a typical relation between the frequency control signal and the number of revolutions per min for

a VSC.

In this example, the compressor operating range can be dened as:

• Start speed: 66 Hz

• Minimum speed: 50 Hz

• Maximum speed: 150 Hz

• Stop speed: < 50 Hz

Please notice: In the example above, the VSC compressor can be stopped by giving a low frequency control signal in the

range below 50 Hz and this means that a digital output for start/stop of the compressor can be saved and thereby used for

another function.

The capacity control will run as follows: When the thermostat air temperature increases above the thermostat cut-in limit,

the frequency signal will jump to 66 Hz and the compressor will run at this speed for 10 sec, before the variable speed

control takes over. From here on, the frequency will vary with the requested capacity of the compressor and ensure a

precise temperature control in the cabinet. If the requested capacity reaches the dened minimum speed limit of 50%,

the compressor will continue to run at this speed until the air temperature decreases below the cut-out limit for a set time

delay. At this point, the frequency signal will drop to the dened stop frequency and the compressor will be cut-out via the

relay signal (if congured).

Di

erential

Cut-in

Cut-out

Ref

Temp °C

Danfoss

80G8743

Figure: Temperature control with VSC

Speed [RPM]

Compressor speed versus Frequency signal

Frequency (Hz)

020406080 100 120 140 160

4,500

4,000

3,500

3,000

2,500

2,000

1,500

1,000

500

50 Hz

2,000 RPM

66 Hz

2,000 RPM

150 Hz

4,500 RPM

60 Hz

1,800 RPM

50 Hz

1,800 RPM

Danfoss

80G8755

User Guide | Case/room controller (TXV), AK-CC25 Pro and AK-CC25 Pro BT

Parameter Value Description

c49 Stop speed 0 – c46 Hz

Frequency signal for switching OFF compressor

c46 Minimum speed c49 – c47 Hz

Minimum compressor speed

c47 Start speed c46 – c48 Hz

Start speed of compressor

c48 Max speed c47 – 200 Hz

Maximum compressor speed

c82 Speed Kp 3.0 – 30.0

Amplication factor for PI control when close to setpoint

c98 Max. Kp factor 5.0 – 50.0

Amplication factor for PI control when far from setpoint

c83 Speed Tn 30 – 900 s

Integration time for PI controller

c96 Max. speed slope 0.1 – 5 (%/s)

Maximum allowed change in speed per second (%/s)

c97 Comp. defrost speed 0 – 100%

The compressor will run with the dened speed during the hot gas defrost

Parameter Value Description

P79 Oil return speed P77 – 100%

Speed at oil return cycle – in percentage of max speed

P80 Oil return time period 10 – 600 s

Duration of oil return cycle

P77 Oil return speed limit 0-100%

When the speed is below, the oil return counter increases

When the speed is above, the oil return counter decreases

P78 Oil return interval 5 – 720 min

When oil return counter reaches this value, an oil return cycle is initiated

Oil return management

If the variable speed compressor is running with a low speed for a long period, there is a risk that oil will be trapped in

the system and will not return to the compressor. The oil return management feature will prevent this from happening. If

the variable speed compressor has been running below a set oil return speed for a set period of time, the compressor will

increase the speed for a dened period of time and thereby ensure that oil is returned to the compressor due to the higher

refrigerant velocity in the pipes.

Figure: Oil return management for variable speed compressor

Danfoss

80G8756

Oil return

speed

Comp. speed %

Minimum

oil return

speed limi

Oil return

interval

Decreasing

counter

Increasing

counter

Oil return period

Oil return

sequence initiated

Counter

ime

Time

User Guide | Case/room controller (TXV), AK-CC25 Pro and AK-CC25 Pro BT

Parameter Value Description

P39 Resonance band start 0 – 100%

Speed at start of resonance band - set in percentage of max speed

P40 Resonance band 0 – 15%

Width of resonance band

Parameter Value Description

c01 Min ON time 0 – 30 min

Minimum time a compressor shall run once started

c02 Min OFF time 0 – 30 min

Minimum time a compressor shall stand still once stopped

Compressor anti cycle timers

The compressor anti cycle timer function applies to each compressor in a given compressor conguration.

If a compressor is started, it has to run for a set Minimum ON time.

If a compressor is stopped, it has to be at standstill for a set Minimum OFF time.

Compressor safety monitoring

The safety chain of the compressor can be monitored via a digital input signal. If the safety chain is broken e.g. HP switch

open, a compressor safety alarm will be generated, and the compressor will be stopped. Once the problem has been

remedied, the compressor will be started, provided that the min. OFF timer for the compressor has expired. For the dual

compressor application, only one alarm will be generated as it is not possible to identify which compressor that has been

cut-out on safety. For the dual circuit application, a digital input can be dened for each compressor circuit.

Resonance band

Speed control can cause mechanical resonance vibrations to occur in the system and thereby create irritating noise. To

prevent this, the speed control features an option of eliminating the speed range where the mechanical vibrations are

present. The speed resonance range is dened as a minimum resonance limit and a resonance zone. Within the dened

resonance range, the speed will be kept constant, please refer to the curve below.

X Requested capacity

Y AO1 voltage

A P40 Resonance band

B P39 Resonance band start

Figure: Safety monitoring of compressor via digital input

Figure: Resonance curve

DI safety

Danfoss

80G8741

M M

Danfoss

84B8306

User Guide | Case/room controller (TXV), AK-CC25 Pro and AK-CC25 Pro BT

Semi-automatic safety protection and lockout of compressor

Normally alarms are reset automatically when an alarm condition is cleared. However, if the semi-automatic reset option

is enabled for the compressor safety monitoring via DI or the condenser block monitoring, then the associated alarm will

be reset automatic when the alarm condition is “False” (DI input is closed or condenser temp dropped) unless it is raised

more than a max dened number of times within a dened period of time, whereby the compressors are locked out and

prevented from starting. At this point in time, also a “Compressor lockout” alarm is generated, and a clearance of the safety

alarm and the lockout alarm shall require a manual reset action.

The maximum no. of alarms that are allowed to be raised before a manual reset is required can be dened. Please refer to

example below where the max no. of compressor safety alarms is dened as 2 within a set alarm reset period. When the

alarm is raised the third time a compressor lockout alarm is generated, and a manual reset is required to reset the safety

alarm and the lockout alarm and release the compressor for a new start up.

The safety lockout alarm can be reset in one of the following ways:

• Putting main switch in OFF position

• Powering down the controller

• Via network parameter

• By a long press on display alarm button while in alarm menu

Parameter Value Description

P92 Safety action 0: None

1: Lights o

Select the action taken if repeated condenser block alarms result in lockout of

compressors

P93 Safety event period 0 – 120 min

Time period for counting maximum number of allowed safety events for compressor

safety and condenser block safety

P94 Max safety events 0 – 20

The maximum of repeated compressor safety and condenser block safety events before

the compressors are lockout

--- Alarm reset ON/OFF

Network parameter for resetting safety lockout alarm

Figure: Semi-automatic reset and lockout of compressor operation

Danfoss

80G8742

omp.

fety (DI)

omp.

fety alarm

omp.

lockout alar

Compressor

safety alarm

Auto resetAuto resetCompressor

safety alarm +

Compressor lockout

Manual reset

of alarms +

Compressor released

Compressor

safety alarm

Alarm reset period

123

User Guide | Case/room controller (TXV), AK-CC25 Pro and AK-CC25 Pro BT

Defrost control

Defrost start

All the mentioned defrost start methods can be used in parallel – if just one of them is activated, a defrost will be started.

Manual start

An extra defrost can be activated from the defrost button on the display via the app, or via a parameter setting.

Network

The defrost start signal is received from a system manager via data communication.

Display button

A long press on defrost button will initiate a defrost or stop an on-going defrost.

Interval

Defrost is started at xed time intervals like e.g. every eighth hour. An interval must ALWAYS be set to a “higher” value than

the period set between two defrost cycles when a schedule or network signal is used.

Week schedule

Here defrost can be started at xed times of the day and night. However, max. 6 defrosts per day.

Digital input

Defrost is started with a contact signal on a digital input.

Max. thermostat runtime

When the aggregate thermostat runtime has passed a preset value, a defrost will be initiated.

We need to add one more defrost start method - I will provide text and drawing in separate document. The start method is

called: Defrost on demand - S5 Evap. temp. drop at icing up of evaporator.

Parameter Value Description

Start defrost ON/OFF

Command for starting a defrost

Stop defrost ON/OFF

Command for stopping a defrost

Parameter Value Description

d03 Defrost start interval 0 – 240 hours

Max time interval between two defrost start

d05 Time staggering power-up 0 – 240 min

Time delay added to interval time for start of rst defrost at power up

Parameter Value Description

d18 Max. thermostat run time 0 – 240 hours

Accumulated compressor runtime before start of defrost

Parameter Value Description

t00 Defrost schedule No/Yes

Enable defrost schedule

t01 Def. start 1 - Hours 0 – 23 hours

Time for start of rst defrost - hours

t11 Def. start 1 - Min 0 – 59 min

Time for start of rst defrost - min

----

t06 Def. start 6 - Hours 0 – 23 hours

Time for start of sixth defrost - hours

t16 Def. start 6 - Min 0 – 59 min

Time for start of sixth defrost - min

User Guide | Case/room controller (TXV), AK-CC25 Pro and AK-CC25 Pro BT

Defrost on demand

The feature is based on the fact that the suction pressure will decrease if the evaporator is icing up. After a defrost the

controller will register the temperature level of the S5 evaporating temp. each time the thermostat makes a cut-out, please

refer to the drawing below.

Over time the evaporator is icing up and the S5 evaporating temperature will drop compared to when the evaporator was

clean. The user shall dene how much the S5 sensor value is allowed to drop during operation, compared to the baseline

value obtained just after a defrost cycle where the evaporator is clean.

If the S5 evaporating temp. is below the set limit 3 times in a row, a defrost is initiated.

Parameter Value Description

d19 DOD S5 dierential 0 – 20 K

Maximum allowed drop in S5 Evaporating temperature for starting a defrost sequence

Defrost sequence

When a defrost is initiated, the controller will run through the following sequence:

1. Pump down state, where the compressor is run to build up hot gas (plugin case) if a hot gas defrost cycle is to be run.

For other defrost methods the compressor is not run during pump down state.

2. Equalization state only used for hot gas defrost, where the hot gas valve is opened while the compressor is stopped

3. Defrost state, where the ice is melted. The duration of an on-going or the last defrost can be read out as well as the

average duration of the last 10 defrost states

4. Hold after defrost state, where multiple controllers wait for each other (only used at coordinated defrost)

5. Drip o state, where remaining water is dripping o evaporator

6. Fan delay state, where the fans are stopped and when the remaining water has turned into ice, the fans are restarted.

The duration of the defrost states are set via the following parameters:

Parameter Value Description

d01 Defrost method 0: None

1: Air

2: Electrical

3: Hot gas

4: El. pulsing

Select method of defrost

d10 Defrost stop method 0: Time

1: S5

2: S4

3: S5A + S5B

Here you dene whether a defrost cycle is to be stopped by time or by a temperature

sensor

d02 Defrost stop limit 0 – 50 °C

When the selected defrost stop sensor reaches the set limit, the defrost cycle is

terminated

d04 Max. defrost time 0 – 45 min

Max. duration of a defrost cycle

d24 Min. defrost time 0 – 60 min

Min. duration of defrost state

d16 Pump down delay 0 – 60 min

Duration of pump down state

d42 Pressure equalization delay 0 – 30 min

Pressure equalization delay for hot gas. During pressure equalization state the hot gas

valve is open to equalize pressure levels in the system

o16 Max. hold time 0 – 360 min

Max. duration of hold state at co-ordinated defrost

d06 Drip o time 0 – 60 min

Here you set the time that is to elapse from a defrost state is terminated and until the

compressor is to start again. (The time when water drips o the evaporator).

d07 Fan start delay 0 - 60 min

Here you set the time that is to elapse from compressor start after a defrost and until

the fan may start again. (The time when remaining water is transformed into ice on the

evaporator).

Danfoss

80G8740

Thermostat air

S5 Evaporator temp

Cut-in

Cut-out

ed baseline

DOD S5 Di

erential

User Guide | Case/room controller (TXV), AK-CC25 Pro and AK-CC25 Pro BT

Defrost method

The following defrost methods can be selected:

• None

• Air cycle defrost

• Electrical defrost

• Simple hot gas defrost

• Electrical defrost – pulsing heaters

The duration of the defrost states are set via the following parameters:

When the defrost method has been selected for “None” the whole defrost control is disabled and it will not be possible to

start a defrost sequence.

Parameter Value Description

d01 Defrost method 0: None

1: Air

2: Electrical

3: Hot gas

4: El. pulsing

Select method of defrost

Air cycle defrost:

At air cycle defrost the evaporator is defrosted by stopping the compressor and recycling the cabinet air through the

evaporator. The defrost heater output is not used.

(1)

The fan status depends upon selected fan control during defrost (Here fan control = ON).

Figure: Air cycle or natural defrost by circulating air

Output Pump down state Defrost state Hold after defrost

state

Drip delay state Fan delay state

Compressor 1 OFF OFF OFF OFF

Compressor 2 OFF OFF OFF OFF

Comp. speed OFF OFF OFF OFF

Defrost OFF OFF OFF OFF

OFF

Fan

(1)

ON ON ON ON

OFF

M M

Danfoss

80G8738

User Guide | Case/room controller (TXV), AK-CC25 Pro and AK-CC25 Pro BT

Electrical defrost

At electrical defrost, heaters are placed in front of the evaporator to increase the air temperature and thereby defrost the

evaporator. The fans need to run during the defrost state to force the air through the heaters and subsequently through

the evaporator.

The defrost sequence will be as shown in the table below:

(1)

The fan status depends upon selected fan control during defrost (Here fan control = OFF at drip.

Figure: Electrical defrost with heaters in front of evaporator

Output Pump down state Defrost state Hold after defrost

state

Drip delay state Fan delay state

Compressor 1 OFF OFF OFF OFF

Compressor 2 OFF OFF OFF OFF

Comp. speed OFF OFF OFF OFF

Defrost OFF ON OFF OFF

OFF

Fan

(1)

ON ON OFF OFF

OFF

Electrical defrost with pulsing heaters

During the defrost state, the electrical heaters will be kept ON, until the defrost stop sensor reaches the set defrost stop

limit. At this point in time the defrost heaters will be switched OFF. If the temperature of the selected defrost stop sensor

decreases 1K below the set defrost stop limit, the defrost heaters will be switched ON again and kept ON until the defrost

stop sensor reaches the defrost stop limit once again whereby the heaters are switched OFF. This pattern is repeated until

the max defrost time has expired whereby the active defrost state is terminated and the defrost sequence continues with

the next defrost state, please refer to the gure below.

Figure: Defrost state with pulsing of electrical heaters

M M

Danfoss

80G8737

Danfoss

80G8739

Temp °C

S5A Evap. temp

Defrost stop limit

1 K

Max. defrost time

Defrost

stop

Defrost

heater

Time

User Guide | Case/room controller (TXV), AK-CC25 Pro and AK-CC25 Pro BT

Simple hot gas defrost

Simple hot gas defrost is used in plug in units, where the compressor must run during the defrost state to produce hot

gas for the defrosting of the evaporator. The defrost output is used to control a hot gas by-pass valve. As the evaporator is

defrosted from within the refrigerant circuit, the fans are usually not used during the defrosting.

The defrost sequence will be as shown in the table below:

Figure: Simple hot gas defrost with bypass valve

Output Pump down state Pressure equaliza-

tion state

Defrost state Hold after defrost

state

Drip delay state Fan delay state

Compressor 1 ON OFF ON OFF OFF

Compressor 2 ON OFF ON OFF OFF

Comp. speed Defrost speed OFF Defrost speed OFF OFF

HG valve OFF ON ON ON/OFF*1 ON/OFF

(1)

OFF

Fan

(2)

ON/OFF

(2)

OFF OFF OFF OFF

OFF

Cond. fan Normal/OFF

(3)

Normal/OFF Normal/OFF Normal Normal

Normal

(1)

State of HG valve can be selected, so that a drip tray heater can be used on the same output.

(2)

The fan status depends upon selected fan control during defrost (Here fan control = OFF).

(3)

State of condenser fan can be dened – Either normal control or OFF to build up more hot gas pressure.

Defrost stop

The defrost state in the defrost sequence can be stopped by one of the following ways:

• Defrost stop on time

• Defrost stop on S5A temp.

• Defrost stop on S4 temp.

• Defrost stop on S5A temp and S5B temp

When the selected defrost stop sensor reaches the set defrost stop limit, the defrost is terminated. If the defrost stop sensor

does not reach the set defrost stop limit within the set max. defrost time, the defrost will be terminated on time.

Parameter Value Description

d43 Hot gas valve at drip ON/OFF

Select whether hot gas valve shall be ON or OFF during drip state. This provides the

option of having a drain heater connected to the hot gas valve output.

d45 Cond. fan at defrost OFF/Normal control

Select whether the condenser fan shall run normal control or stop during a hot gas

defrost

Parameter Value Description

d10 Defrost stop method 0: Time

1: S5

2: S4

3: S5A + S5B

Here you dene whether a defrost cycle is to be stopped by time or by a temperature

sensor

d02 Defrost stop limit 0 – 50 °C

When the selected defrost stop sensor reaches the set limit, the defrost cycle is

terminated

M M

HGV

Danfoss

80G8736

User Guide | Case/room controller (TXV), AK-CC25 Pro and AK-CC25 Pro BT

Co-ordinated defrost

Co-ordinated defrost can be arranged in two ways

Wired co-ordinated defrost

The digital input DI2 must be congured for coordinated defrost and wiring must be connected between the relevant

controllers.

When using S5A and S5B sensors for defrost stop, the control logic depends upon the number of dened defrost outputs

and whether it is a single circuit or dual circuit application. The logic is as follows:

No output dened

Defrost state is terminated when S5A and S5B both have reached the set defrost stop limit.

One defrost output

Defrost output goes OFF, when S5A and S5B both have reached the defrost stop limit.

At hot gas defrost with two refrigeration circuits, the compressors are stopped individually when the associated S5 sensor

reaches the defrost stop limit.

Two defrost outputs

The individual defrost output goes OFF, when the associated S5 sensor reaches the defrost stop limit.

At hot gas defrost with two refrigeration circuits, the compressors are stopped individually when the associated S5 sensor

reaches the defrost stop limit.

When one controller starts a defrost, all the other controllers will follow suit and likewise start a defrost. After the defrost,

the individual controllers will move into waiting position. When the last controller ends defrosting, the defrost sequence

will continue with drip delay.

Figure: Defrost co-ordination via DI2 inputs

Figure: Timing diagram for co-ordinated defrost

Danfoss

80G8734

Hold stateDefrost state

DI signal

1234

Drip state

Hold stateDefrost stat

rip state

Defrost stat

rip state

Danf

oss

80G8735

DI DI DI

User Guide | Case/room controller (TXV), AK-CC25 Pro and AK-CC25 Pro BT

Co-ordinated defrost via network

Here the network system manager handles the coordination. The controllers are gathered in defrosting groups and the

system manager ensures that defrosting is started in the group according to a weekly schedule.

When a controller has completed defrosting, it sends a message to the system manager and then goes into a waiting

position. When the last controller ends defrosting the defrost sequence will continue with drip delay.

Parameter Value Description

o16 Max. hold time 0 – 360 min

Max. waiting time at coordinated defrost.

Parameter Value Description

d09 Fan control during defrost 0: OFF

1: ON

2: OFF at drip

3: OFF at temp.

Here you can set how the fan is to operate during defrost.

Fan control during defrost

During the defrost sequence, the evaporator fans can be controlled in one of the following ways:

• The fan is OFF during the entire defrost sequence

• The fan is ON during the entire defrost sequence except during fan delay state

• The fan is ON during defrost state and is OFF during the rest of the defrost sequence

• Like fan is ON during defrost sequence, however the fans are stopped if the selected defrost stop sensor exceeds a set

fan stop limit

Fan delay state

When entering the fan delay state cooling is resumed and the fans are stopped (if not already OFF), so that the remaining

water on the evaporator surface can be transformed into ice.

The fans will be started based on either of the two conditions:

1. If the S5 evaporator sensor temperature has decreased below a set temperature limit. If two defrost stop sensors are

used, the highest value of the two S5 sensors shall be below the set temperature limit.

2. If the maximum fan delay time expires, the fans will be started irrespectively whether the S5 sensor has reached the set

minimum temperature limit for starting the fans.

Figure: Fan control options during defrost

Danfoss

80G8733

Pump

down

state

Fans ON

Stop on temp

Electrical

Fans ON

Electrical

Fans ON

Air cycle

Fans OFF

Hot gas

Defrosting

state

Hold

state

Drip

state

Fan

delay

state

Time

User Guide | Case/room controller (TXV), AK-CC25 Pro and AK-CC25 Pro BT

Parameter Value Description

d27 Rail heat during defrost 0: OFF

1: ON

2: Normal ctrl

Here you can set how the rail heat is to operate during defrost.

Parameter Value Description

d20 Drip tray heater delay 0 – 240 min

Set the post delay time for stop of drain heater

Rail heat control during defrost

During the defrost sequence, the rail heat control can be managed in the following ways:

• Rail heat is stopped to minimize power consumption during defrost sequence

• Rail heat goes to 100% power to eliminate water to condense on glass parts

• Rail heat continue normal control

Drain heater control

The drain heater is used to ensure that the water drainage system is kept ice free while defrosting the evaporator. The

function is enabled if one of the DO outputs is congured for the Drain heater function.

When a defrost sequence is started, the Drain heater output is set ON. The drain heater output will stay ON during the

whole defrost sequence plus for a set post delay counted from the ending of the drip state.

Figure: Control of drain heater during a defrost sequence

Danfoss

80G8732

Drain

heate

Defrost

start

Post-delay

Normal

control

state

Pump

down

state

Defrost

state

Hold

state

Drip

state

Fan

delay

state

User Guide | Case/room controller (TXV), AK-CC25 Pro and AK-CC25 Pro BT

Fan control

Fan pulsing

Whenever cooling is performed the evaporator fans will have to run to ensure a good heat exchange between the

refrigerant in the evaporator and the cabinet air. However, if the refrigerated cabinet is covered by a night curtain

eliminating intake of fresh air, the fans can be pulsed in the thermostat cut-out periods where no cooling takes place. As

cold rooms by denition is closed spaces, then the fans can be pulsed during the thermostat cut-out periods around the

clock.

The reason for pulsing the fans and not stopping them completely, is that the air has to be circulated in the cabinet from

time to time in order for the air temperature sensors to represent the temperature of the refrigerated produce inside the

cabinet/cold room.

The user shall have the following options for pulsing the evaporator fans:

• At nighttime at thermostat cut-out on refrigerated cabinets with night covers/curtains

• At thermostat cut-out around the clock on refrigerated cabinets with permanent night covers and for cold rooms

The user shall be able to dene the period time of a pulse cycle and the percentage of ON time of the fan within the

dened pulse cycle, please refer to drawing below.

Fan stop at loss of refrigeration

If the refrigeration in a breakdown situation stops, the temperature in the cold room may rise quickly because of the

emission of heat from large fans. To prevent this situation, the controller can stop the fans if the evaporator temperature

S5 exceeds a set limit value. The fans will start running again when the S5 temperature has dropped 2K below the set

limit. (The function can also be used as a type of MOP function. Here the load on the compressors is limited until the S5

temperature has fallen below the congured value).

Rail heat control

Rail heaters are used on refrigerated cabinets to prevent moisture condensation on glass and rails. It is possible to pulse-

control the power to the rail heat to save energy. Pulse control can either be timer controlled according to variations in

day/night loads or due to the actual dew point.

Timer controlled

Here the rail heater is controlled according to a duty cycle pattern, where the heaters are set ON for a set percentage of the

period time for respectively day and night operation. In this way the user can adapt the rail heaters power consumption to

the actual load for day and night operation. The principle of the duty cycle control is shown in the gure below.

Figure: Pulsing control of fans

Parameter Value Description

F05 Fan pulsing mode 0: Nu pulsing

1: Always pulsing

2: Pulsing night

Select when to pulse the fans at thermostat cut-out

F06 Fan period time 1 – 120 min

Period time for pulsing of fan

F07 Fan ON cycle 0 – 100%

The ON time is set as a percentage of the period time

Parameter Value Description

F04 Fan stop high S5 temp. -60 – 50 °C

If the evaporator sensor S5 registers a higher temperature than the one set here, the

fans will be stopped. Function is enabled by setting the value above the minimum

setting range.

Danfoss

80G8731

Period time

On time %

User Guide | Case/room controller (TXV), AK-CC25 Pro and AK-CC25 Pro BT

Dew point controlled

In order to use this function, a system manager of the type AK-SM is required which can measure ambient temperature and

humidity to calculate dew point and distribute to the appliance controllers.

For this the rail heat’s ON period is controlled according to the distributed dewpoint. Two dew point values must be set in

the rail heat control:

• The maximum dew point at which the power must be max. i.e. 100% (o87)

• The minimum dew point at which the power must be at the set minimum value (o86)

At a dewpoint which is equal to or lower than the value in o86, the eect will be the value indicated in o88. In the area

between the two dew point values, the controller will manage the power to be supplied to the rail heat.

Parameter Value Description

o88 Rail heat min. ON cycle 0 – 100%

The minimum power to the rail heaters

o86 Dewpoint min. limit -10 – o87 °C

Minimum dew point, where power is at minimum level

o87 Dewpoint max. limit o86 – 50 °C

Maximum dew point, where power is at 100%

Parameter Value Description

o85 Rail heat control mode 0: Always ON

1: Time control

2: Dew point

Select how the rail heaters are to be controlled

o43 Rail heat period time 6 – 60 min

Period time for pulsing of fan

o41 Rail heat ON cycle day 0 – 100%

ON time at day operation as a percentage of the period time

O42 Rail heat ON cycle night 0 – 100%

ON time at night operation as a percentage of the period time

Figure: Time controlled pulsing of rail heat for day respectively night operation

Figure: Rail heat control according to measured dew point

Minimum

dew point

Rail heat power

inimum

power

100%

Maximum

dew point

Danfoss

80G8729

Period time

On-Day %

On-Night %

Danfoss

80G8730

User Guide | Case/room controller (TXV), AK-CC25 Pro and AK-CC25 Pro BT

Light control

The function can be used for controlling the light in a refrigeration appliance or in a cold room. It can also be used for

controlling a motorized night blind. The light function can be dened in several ways.

1. The light is controlled via the day/night function. A digital input setup for light control can switch light ON, if the light is

switched o during night

2. The light is controlled by a system manager via the parameter o39. A digital input setup for light control can switch light

ON, if the light is switched o by the system manager.

3. Light is controlled via the door switch. Light is switched ON when door is opened and switched OFF 2 min after the door

has been closed.

4. Like option 2, but here the light is switched ON automatically if the communication to the system manager has been

lost for 15 min

5. Light is only controlled via a digital input setup for light control

The light load must be connected to the NC terminals on the relay. This ensures that the light remains ON in the appliance

if power to the controller should fail. A setting denes how light is controlled when regulation is stopped via r12 Main

switch = OFF (see o98). The light is switched o when the appliance cleaning function is activated.

Condenser

Safety monitoring

The feature is enabled when a condensing temperature sensor Sc has been congured.

If the condenser temperature is exceeding the set condenser alarm limit a “Condenser high temp” alarm is generated and if

possible, the running compressor capacity is reduced to limit the heat load on the condenser and thereby keep the cabinet

running. The action taken depend upon the compressor conguration:

• For a single ON/OFF compressor, the compressor will be allowed to run (Capacity cannot be reduced)

• For a single circuit with 2 compressors, the second compressor is stopped

• For a variable speed compressor, the compressor max capacity will be limited to the 0,75 x calculated emergency speed

• For a dual circuit, no action is taken as we do not know which circuit the condenser belongs to

If the condenser temperature is continuing to raise and exceeds the set condenser block limit for a set time delay, a

“Condenser block” alarm is generated and for single circuit any running compressor(s) is stopped and is not allowed to start

again. For dual circuit, the compressors are not stopped.

The alarm shall be reset, and the compressor(s) is allowed to start again when the condenser temperature Sc has dropped

with 2 times the set temperature alarm dierential, please refer to the drawing above.

Parameter Value Description

u63 Light ON/OFF

Status of Light

o38 Light control mode 1: Day/night

2: Network

3: Door

4: Network fallback

5: DI input

Select source for light control

o98 Light at Main switch OFF ON/OFF

Set status of light when main switch is set OFF

Figure: Condenser safety monitoring

Temperature

t1 t2 t3 t4 t5 t6 time

Condenser temp. Sc

Alarm

delay

Alarm

di.

2 x Alarm di

Condenser block limit

ondenser alarm limit

Danfoss

80G8728

STOP

User Guide | Case/room controller (TXV), AK-CC25 Pro and AK-CC25 Pro BT

Condenser fan control

This feature is enabled if a digital output has been congured for condenser fan control and an analogue input has been

congured for condenser sensor Sc.

If the measured Sc condenser temperature increases above the set cut in limit, the condenser fan is started, and if the

temperature decreases with a set dierential, the condenser fan is stopped again.

Door function

The door contact function can via the digital inputs be dened for two dierent applications:

Alarm monitoring only:

A digital input must be congured for Door alarm (value 3).

The controller monitors the door contact and delivers an alarm message if the door has been opened for a longer period

than the set alarm delay.

Alarm monitoring and stop of refrigeration:

A DI input must be congured for Door function (value 2).

When the door is opened, the refrigeration is stopped, i.e. the injection, the compressor and the fan are stopped and light

switches on. If the door remains open for a longer time than the set restart time, refrigeration will be resumed. This will

ensure that refrigeration is maintained even if the door is left open or if the door contact should be defective. If the door

remains open for a longer period than the set alarm delay, an alarm will also be triggered.

Alarm monitoring and stop of fans:

A DI input must be congured for Door fan stop (value 29).

When the door is opened, only the fans are stopped. If the door remains open for a longer time than the set alarm delay, an

alarm is triggered, and the fans will start running again.

The condenser block alarm has the same semi-automatic reset option and the same optional alarm action for switching o

the light as the compressor safety monitoring (see paragraph regarding compressor safety monitoring).

If the max number of “Condenser block alarms” is exceeding the set max number of alarms limit within the set alarm

period, then the condenser block alarm shall result in a full stop of the compressors and a manual alarm reset will be

required to enable the compressors to start.

Parameter Value Description

U09 Sc Condenser temp. °C

Temperature at Sc condenser sensor

A37 Cond. alarm limit 20 – 120 °C

Alarm limit for Sc condenser temperature

A54 Cond. block limit 20 – 140 °C

Stop limit for Sc condenser temperature

A55 Cond. alarm delay 0 – 60 min

Alarm delay for condenser block alarm

A78 Cond. alarm dierential 1 – 30 °C

Temperature dierential for condenser alarms

Parameter Value Description

U15 Condenser fan ON/OFF

Status of condenser fan

F24 Cond. fan cut-in 10 – 110 °C

Temperature limit for start of condenser fan

F25 Cond. fan di. 1 – 20 K

Temperature dierential for stopping condenser fan

Parameter Value Description

o02 DI1 Cong 2: Door function

3: Door alarm

29: Door fan stop

Select function of DI1

o37 DI2 Cong 2: Door function

3: Door alarm

29: Door fan stop

Select function of DI2

A04 Door open alarm delay 0 – 240 min

If the door has been opened for a longer time than the set delay, a door open alarm is

raised.

o89 Door restart inj. delay 0 – 240 min

If the door has been opened for a longer time than the set delay, refrigeration is re-

sumed (if door function is used).

User Guide | Case/room controller (TXV), AK-CC25 Pro and AK-CC25 Pro BT

Leak detection

An external leak detection alarm signal can be monitored via a digital input and an alarm action can be dened if a leak is

detected.

Case cleaning

This function makes it easy for the shop’s sta to carry out a cleaning of the appliance according to a standard procedure.

Appliance cleaning is activated via a pulse signal – as a rule via a key switch placed on the appliance or via the AK-CC55

Connect mobile app.

Appliance cleaning is carried out via three phases:

1. At the rst activation, the refrigeration is stopped, but the fans keep on operating to defrost the evaporators. ”Fan” is

shown on the display.

2. At the second activation, the fans are also stopped, and the appliance can now be cleaned. ”OFF” is shown on the

display.

3. At the third activation, refrigeration is recommenced. The display will show the actual appliance temperature, o97

setting.

When appliance cleaning is activated, a cleaning alarm is transmitted to the normal alarm recipient. A later processing of

these alarms will document that the appliance has been cleaned as often as planned. There are no temperature alarms

during appliance cleaning.

Case shutdown

A digital input can be dened for case shutdown, which can be used to put a unit out of service when not in use. The

function stops control and sets all outputs in standby position. The cooling appliance is stopped like when using the “Main

switch”, however this happens without an “A45 standby alarm”. The function can be enabled by a switch on the DI input or

via a setting through data communication.

Parameter Value Description

o02 DI1 Cong 20: Leak alarm

Select function of DI1

o37 DI2 Cong 20: Leak alarm

Select function of DI2

o59 Leak alarm action 0: No action

1: Compressor OFF

2: Comp. OFF and all fans run

3: Unit is shut down

Select the alarm action at leak detection

Parameter Value Description

o02 DI1 Cong 10: Case clean

Select function of DI1

o37 DI2 Cong 10: Case clean

Select function of DI2

o46 Case cleaning mode 0: OFF

1: Fans run

2: Cleaning

Select the case cleaning mode

Danfoss

80G8744

- + +

°C

1 ÷ +

Fan

2 ÷ ÷

O

3 + +

°C

Parameter Value Description

o02 DI1 Cong 15: Shutdown

Select function of DI1

o37 DI2 Cong 15: Shutdown

Select function of DI2

MC Case shutdown ON/OFF

Master control parameter for shutdown via system manager

Table: Appliance cleaning function

User Guide | Case/room controller (TXV), AK-CC25 Pro and AK-CC25 Pro BT

Power up delay

To prevent having a too high power consumption at power up, it is possible to dene a power up delay which will delay

the cut-in of relay loads. By setting dierent power up delays in multiple controllers, the total start-up power consumption

can be distributed over a longer time span.

Display control

The temperature read-out in the display can be selected and a lter time can be applied to the temperature read-out to

prevent too high temperature changes due to door openings. The temperature readout can also be adjusted by an oset.

Real-time clock

The controller has a built-in real-time clock which can be used to start defrosts. This clock has a power reserve of four days.

If the controller is equipped with data communication, the clock will automatically be updated from a Danfoss system

manager.

Master control overrides

The controller contains a number of override functions which can be used together with Master Control functions in the

Danfoss gateway/system manager:

Parameter Value Description

u56 Display readout °C

Display temperature readout

o97 Display readout 1: Weighted S3/S4

2: S6 Product temp.

3: Thermostat air

Select sensor for display readout

o17 Display air S4% 0-100%

Weight of S4 sensor for display readout

r04 Display readout adjustment -10 – 10 °C

Oset adjustment of temperature readout

q80 Display lter time 0 – 600 sec

Filter time for display readout. The lter time represents the time it takes for the

display readout to reach 66% of its nal value

Parameter Value Description

t07 Time hours 0 – 23 Hours

Clock hours

t08 Time min 0 – 59 min

Clock min

t45 Time date 1 – 31

Clock date

t46 Time month 1 - 12

Clock month

t47 Time year 0 - 100

Clock year – 25 means 2025

Parameter Description

MC Ther. toggle

Master control signal used for switching case load ON/OFF depending on the load condition

MC Night setback

Master control signal for changing between day and night time operation

MC Case shutdown

Master control signal used to shut down a case for a time period. During shutdown there will be no alarm monitoring

MC Forced cooling

Master control signal that will provide forced cooling

MC Defrost start

Master control signal for starting a defrost

MC Defrost state

Read out the actual state of the defrost

MC Hold after defrost

Master control signal used for co-ordinated defrost control to hold cabinets from returning to normal refrigeration after a

defrost until all cabinets have terminated defrost

MC Stop defrost

Master control signal used to prevent a defrost start in a controller.

MC Light signal

Master control signal for control of light via a data communication signal from the system manager

MC Actual dewpoint

Master control signal sending the actual measured dewpoint from the system manager to the controller over the network.

MC Po load factor

Calculated load factor for the refrigerated appliance. Used for suction pressure optimization

MC Key/Bluetooth lock

Master control signal that will lock down all Bluetooth data communication and optionally also the operation of the display

keys (depend upon selection in P89 Display keyboard lock)

MC Load request

Master control signal used to control the load balance between multiple case controllers on the same suction line

Parameter Value Description

o01 Delay of outputs at power-

0 – 600 sec

Set delay for activation of relay loads at power up

User Guide | Case/room controller (TXV), AK-CC25 Pro and AK-CC25 Pro BT

Performance monitoring

The controller can monitor certain key performance indicators, telling something about how well the unit is operating.

These key performance indicators are available in the AK-CC Connect App.

Number of high temp. alarms

The controller keeps track of the number of high temperature alarm for the last 7 days.

Temperature quality

The temperature quality tells how well the unit is performing temperature wise over a time window of 24 hours.

The temperature quality read-out is a weighted value taking the temperature deviation and time into account. If the

thermostat air temperature is within the band of “thermostat cutin + a set oset” and “Thermostat cutout – a set oset”

the temperature quality will be 100%. The further away the thermostat air temperature is from this band, the lower the

temperature quality will be. If the thermostat air temperature reaches the high or low alarm limit, the air quality will be 0%.

Note: the temperature quality will never be 100% as defrost cycles and other interruptions will be counted into the

performance. But the value can be used to optimize control.

Figure: Performance dashboard in AK-CC Connect App

Figure: Temperature quality as function of deviation from thermostat cut-in and cut-out limits

Parameter Value Description

X31 Air temp. performance 0 – 100%

Readout of actual thermostat air quality for the last 24 hours

X32 Temp. oset 0 – 10 K

Oset to thermostat cut-in and cut-out limits, where air quality is 100%

Danfoss

80G8725

Rolling window of 24 hours

High alarm limit

Quality level

100%

Time

Temp.

Cut-in + 1K

Cut-in

Cut-out

Cut-out – 1K

Low alarm limit

User Guide | Case/room controller (TXV), AK-CC25 Pro and AK-CC25 Pro BT

Average compressor capacity

Readout of the average compressor capacity for the last 24 hours. If the average compressor capacity is increasing over

time or if it is close to 100%, it should be checked that the case is not overloaded. If not, a service call might be required to

optimize the operation of the unit.

Door openings and door open time

Readout of the actual number and accumulated opening time of the door for the last 24 hours.

Defrost duration

Readout of the duration of the last defrost cycle as well as the average duration of the last 10 defrost cycles. These values

can be used to evaluate whether the defrost cycles are running at optimal conditions and with a correct stop limit.

Network integration

AK-CC25 is supported by the following Danfoss system managers:

• AK-SM 720/350

• AK-SM 800/800A

When installing the controller into a Danfoss network system, follow the following procedure:

1. Select the application mode (o61)

2. Set the unit address (o03)

3. Perform a network scan from the system manager

AK-CC25 can also be integrated into third party Modbus network systems and then the following network parameters

might need to be set:

Cyber security best practices:

• When installing the Modbus network cable, the terminals shall be placed at a physical restricted area only accessible by

authorized personnel.

• The access level codes o05, o64 and P88 shall be set once the controller is installed.

Note: Once the access codes are set, they cannot be retrieved from any interface. Therefore, ensure you record the values

and store them safely for future reference.

• It is recommended to set an access level for the Bluetooth advertising button via parameter q81.

• It is recommended to set an access level for the function display keys (light switch, defrost start and alarm reset) via the

parameter q82.

• It is recommended to lock the display keys, either via the system manager AK-SM 800A (best security) or locally via the

parameter P89.

A list of Modbus register numbers can be found at Danfoss.com

Parameter Value Value Description

o03 Network address 1 – 240

Network address

When used in a network system with a Danfoss system manager AK-SM 800A,

the address has to be set in the range 1 – 199.

The Modbus interface can be disabled by setting the network address to -1

oa1 Baudrate 1: Auto

2: 9600 baud

3: 19200 baud

4: 38400 baud

5: 115200 baud

Baudrate of data communication.

When installed in a Danfoss network system, leave the setting at “Auto”

oa2 Parity and stop bit 0: None

1: Even

2: Odd

None: No parity bit and two stop bits

Even: Even parity bit and one stop bit

Odd: Odd parity bit and one stop bit

User Guide | Case/room controller (TXV), AK-CC25 Pro and AK-CC25 Pro BT

R-W

If the operation is protected by one or more passwords, reading and setting the parameter will be limited to: R or W

This setting can be seen with password no. _ or higher (3 is the highest level).

This setting can be performed with password no. _ or higher (3 is the highest level).

The asterisk indicates in which application from 1-9 the parameter is applicable.

Display menu

Parameters

Parameter grouping at display operation

(PS)

r12

o61

r--

o03

r05

o06

c08

A--

r89

c--

r00

r15

r61

A36

d--

F--

t--

d01

d03

o--

d10

p--

d04

q--

d02

u--

SET

cFg

Set

Danfoss

80G8718

SET button,

3 s: Conguration settings

PS: Password (if any)

Main switch

Menu groups

See also the following pages.

Application

MODBUS address

Temperature unit

Sensor types

Step control mode

Food type

Cut-out temperature

Ther. sensor S4 %

Ther. sensor S4% night

Alarm sensor S4%

Defrost method

Defrost interval

Defrost sensor

Max. defrost time

Defrost stop temperature

(Return)

Thermostat

Code Function Values R-W 1 2 3 4 5 6 7 8 9 Min. Max. Fact.

r00 Cut-out 1 0-0 * * * * * * * * * r03 r02 2.0 °C

r01 Dierential 1-2 * * * * * * * * * 0.1 °C 20.0 °C 2.0 °C

r02 Max cut-out limit 0-2 * * * * * * * * * r03 50.0 °C 50.0 °C

r03 Min cut-out limit 0-2 * * * * * * * * * -60.0 °C r02 -60.0 °C

r04 Display readout adjustment 1-2 * * * * * * * * * -10.0 °C 10.0 °C 0.0 °C

r05 Temperature unit 0=Celsius, 1=Fahrenheit 1-2 * * * * * * * * * 0 1 0

r09 S4 Air OFF evap. - Adjustment 1-2 * * * * * * * * * -10.0 °C 10.0 °C 0.0 °C

r10 S3 Air ON evap. - Adjustment 1-2 * * * * * * * * * -10.0 °C 10.0 °C 0.0 °C

r11 S5 Evaporator A -

Adjustment

1-2 * * * * * * * * * -10.0 °C 10.0 °C 0.0 °C

r12 Main switch -1=Manual, 0=Stop, 1=Start 0-2 * * * * * * * * * -1 1 0

r13 Night oset 1-2 * * * * * * * * * -50.0 °C 50.0 °C 0.0 °C

r14 Thermostat mode 2=Modulating, 1=ON/OFF 0-X * * * * * * * * * 1 2 1

r15 Thermostat sensor S4% 1-2 * * * * * * * * * 0% 100% 100%

r16 Melt interval 1-2 * * * * * * * * * 0 h 10 h 1 h

r17 Melt period 1-2 * * * * * * * * * 0 min 30 min 5 min

User Guide | Case/room controller (TXV), AK-CC25 Pro and AK-CC25 Pro BT

Alarm settings

(1)

In order to change this parameter the regulation must be stopped via the parameter r12 Main switch = OFF.

Code Function Values R-W 1 2 3 4 5 6 7 8 9 Min. Max. Fact.

A03 Alarm delay 1-2 * * * * * * * * * 0 min 240 min 30 min

A04 Door open alarm delay 1-2 * * * * * * * * * 0 min 240 min 60 min

A12 Alarm delay pull down 1-2 * * * * * * * * * 0 min 240 min 90 min

A13 High alarm limit 1 1-2 * * * * * * * * * -60.0 °C 50.0 °C 8.0 °C

A14 Low alarm limit 1 1-2 * * * * * * * * * -60.0 °C 50.0 °C -30.0 °C

A27 Alarm delay DI 1 1-2 * * * * * * * * * 0 min 240 min 30 min

A28 Alarm delay DI 2 1-2 * * * * * * * * * 0 min 240 min 30 min

A36 Alarm sensor S4% 1-2 * * * * * * * * * 0% 100% 100%

A37 Cond. alarm limit 1-2 * * 20.0 °C 120.0 °C 100.0 °C

A54 Cond. block limit 1-2 * * 20.0 °C 140.0 °C 120.0 °C

A55 Cond. alarm delay 1-2 * * 0 min 60 min 5 min

A78 Cond. alarm dierential 1-2 * * 1.0 °C 30.0 °C 10.0 °C

Compressor

Code Function Values R-W 1 2 3 4 5 6 7 8 9 Min. Max. Fact.

c01 Min ON time 1-2 * * * * * * * * * 0 min 30 min 0 min

c02 Min OFF time 1-2 * * * * * * * * * 0 min 30 min 0 min

c05 Delay between comp. 1-2 * * * * * 0 s 999 s 5 s

c08 Step control mode 1=Sequential, 2=Cyclic,

3=Dual circuits

1-2

(1)

* * * * * 1 3 2

c46 Minimum speed 1-2

(1)

* * * * * c49 c47 50 Hz

c47 Start speed 1-2 * * * * * c46 c48 60 Hz

c48 Max speed 1-2

(1)

* * * * * c47 200 Hz 150 Hz

c49 Stop speed 1-2 * * * * * 0 Hz c46 20 Hz

c82 Speed Kp 1-2 * * * * * 3,0 30,0 20,0

c83 Speed Tn 1-2 * * * * * 30 s 900 s 60 s

c96 Max. speed slope 1-2 * * * * * 0.1 5,0 1,0

c97 Comp. defrost speed 1-2 * * * * * 0% 100% 100%

c98 Max. Kp factor 1-2 * * * * * 5,0 50,0 20,0

c99 Comp cut-out delay 1-2 * * * * * 0 s 600 s 0 s

(1)

In order to change this parameter the regulation must be stopped via the parameter r12 Main switch = OFF.

Code Function Values R-W 1 2 3 4 5 6 7 8 9 Min. Max. Fact.

r59 S6 product temp. -

Adjustment

1-2 * -10.0 °C 10.0 °C 0.0 °C

r61 Thermostat sensor S4% night 1-2 * * * * * * * * * 0% 100% 100%

r62 Air heater neutral zone 1-2 * 0.0 °C 50.0 °C 5.0 °C

r63 Air heater start delay 1-2 * 0 min 240 min 3 min

r89 Food type 0=None, 1=Vegetables,

2=Dairy, 3=Meat and sh,

4=Frozen food, 5=Ice cream

1-2

(1)

* * * * * * * * * 0 5 0

r98 S4 frost protection 1-2 * * * * * * * * * -60.0 °C 50.0 °C -60.0 °C

ra1 Temp. pulldown di 1-2 * * * * * * * * * -50.0 °C 0.0 °C 0.0 °C

ra2 Temp. pulldown time 1-2 * * * * * * * * * 0 min 300 min 0 min

User Guide | Case/room controller (TXV), AK-CC25 Pro and AK-CC25 Pro BT

Defrost

Code Function Values R-W 1 2 3 4 5 6 7 8 9 Min. Max. Fact.

d01 Defrost method 0=None, 1=Electrical, 2=Hot

gas, 4=Air/Ocycle, 5=Electrical

pulsing

1-3

(1)

* * * * * * * * * 0 5 1

d02 Defrost stop limit 1-2 * * * * * * * * * 0.0 °C 50.0 °C 6.0 °C

d03 Defrost start interval 1-2 * * * * * * * * * 0 h 240 h 8 h

d04 Max. defrost time 1-2 * * * * * * * * * d24 360 min 45 min

d05 Time staggering power-up 1-2 * * * * * * * * * 0 min 240 min 0 min

d06 Drip o time 1-2 * * * * * * * * * 0 min 60 min 0 min

d07 Fan start delay 1-2 * * * * * * 0 min 60 min 0 min

d08 Fan start temperature 1-2 * * * * * * -60.0 °C 10.0 °C -5.0 °C

d09 Fan control during defrost 0=OFF, 1=ON, 2=OFF at drip,

3=OFF at high temp

1-2 * * * * * * 0 3 1

d10 Defrost stop method 0=Time, 1=S5 sensor, 2=S4

sensor, 3=S5A and S5B

1-2 * * * * * * * * * 0 3 0

d16 Pump down delay 1-2 * * * * * * * * * 0 min 60 min 0 min

d18 Max. thermostat run time 1-2 * * * * * * * * * 0 h 240 h 0 h

d19 DOD S5 dierential 1-2 * * * * * * * * * 0 K 20 K 20 K

d20 Drip tray heater delay 1-2 * 0 min 240 min 0 min

d24 Min. defrost time 1-2 * * * * * * * * * 0 min d04 0 min

d27 Rail heat during defrost

0=OFF, 1=ON, 2=Normal control

1-2 * * * 0 2 1

d40 Display delay after defrost 1-2 * * * * * * * * * 5 min 240 min 30 min

d41 Fan stop temperature 1-2 * * * * * * -20.0 °C 20.0 °C 0.0 °C

d42 Pressure equalization delay 1-2 * * * * * * * * * 0 min 30 min 0 min

d43 Hot gas valve at drip 0=OFF, 1=ON 1-2 * * * * * * * * * 0 1 0

d44 Temp. pulldown after defrost 0=No, 1=Yes 1-2 * * * * * * * * * 0 1 0

d45 Cond. fan at defrost 0=OFF, 1=Normal ctrl. 1-2 * * 0 1 1

(1)

In order to change this parameter the regulation must be stopped via the parameter r12 Main switch = OFF.

Fan control

Code Function Values R-W 1 2 3 4 5 6 7 8 9 Min. Max. Fact.

F04 Fan stop high S5 temp. 1-2 * * * * * * -60.0 °C 50.0 °C 50.0 °C

F05 Fan pulsing mode 0=No pulsing, 1=Pulsing cut-

out, 2=Pulsing cut-out night

1-2 * * * * * * 0 2 0

F06 Fan period time 1-2 * * * * * * 1 min 120 min 5 min

F07 Fan ON cycle 1-2 * * * * * * 0% 100% 100%

F24 Cond. fan cut-in 1-2 * * 10.0 °C 110.0 °C 60.0 °C

F25 Cond. fan di. 1-2 * * 1.0 °C 20.0 °C 5.0 °C

User Guide | Case/room controller (TXV), AK-CC25 Pro and AK-CC25 Pro BT

Defrost schedule

Code Function Values R-W 1 2 3 4 5 6 7 8 9 Min. Max. Fact.

t00 Defrost schedule 0=No, 1=Yes 1-2 * * * * * * * * * 0 1 0

t01 Def. start 1 - Hours 1-2 * * * * * * * * * 0 h 23 h 0 h

t11 Def. start 1 - Min 1-2 * * * * * * * * * 0 min 59 min 0 min

t02 Def. start 2 - Hours 1-2 * * * * * * * * * 0 h 23 h 0 h

t12 Def. start 2 - Min 1-2 * * * * * * * * * 0 min 59 min 0 min

t03 Def. start 3 - Hours 1-2 * * * * * * * * * 0 h 23 h 0 h

t13 Def. start 3 - Min 1-2 * * * * * * * * * 0 min 59 min 0 min

t04 Def. start 4 - Hours 1-2 * * * * * * * * * 0 h 23 h 0 h

t14 Def. start 4 - Min 1-2 * * * * * * * * * 0 min 59 min 0 min

t05 Def. start 5 - Hours 1-2 * * * * * * * * * 0 h 23 h 0 h

t15 Def. start 5 - Min 1-2 * * * * * * * * * 0 min 59 min 0 min

t06 Def. start 6 - Hours 1-2 * * * * * * * * * 0 h 23 h 0 h

t16 Def. start 6 - Min 1-2 * * * * * * * * * 0 min 59 min 0 min

t07 Time hours 0-1 * * * * * * * * * 0 h 23 h 0 h

t08 Time min 0-1 * * * * * * * * * 0 min 59 min 0 min

t45 Time date 0-1 * * * * * * * * * 1 31 1

t46 Time month 0-1 * * * * * * * * * 1 12 1

t47 Time year 0-1 * * * * * * * * * 0 100 0

t51 Monday - Follow schedule 0=No, 1=Yes 1-2 * * * * * * * * * 0 1 1

t52 Tuesday - Follow schedule 0=No, 1=Yes 1-2 * * * * * * * * * 0 1 1

t53 Wednesday - Follow

schedule

0=No, 1=Yes 1-2 * * * * * * * * * 0 1 1

t54 Thursday - Follow schedule 0=No, 1=Yes 1-2 * * * * * * * * * 0 1 1

t55 Friday - Follow schedule 0=No, 1=Yes 1-2 * * * * * * * * * 0 1 1

t56 Saturday - Follow schedule 0=No, 1=Yes 1-2 * * * * * * * * * 0 1 1

t57 Sunday - Follow schedule 0=No, 1=Yes 1-2 * * * * * * * * * 0 1 1

t58 Event 1 Open 1-2 * * * * * * * * * 0 h 23 h 0 h

t59 Event 1 Open 1-2 * * * * * * * * * 0 min 59 min 0 min

t60 Event 1 Close 1-2 * * * * * * * * * 0 h 23 h 0 h

t61 Event 1 Close 1-2 * * * * * * * * * 0 min 59 min 0 min

t62 Event 2 Open 1-2 * * * * * * * * * 0 h 23 h 0 h

t63 Event 2 Open 1-2 * * * * * * * * * 0 min 59 min 0 min

t64 Event 2 Close 1-2 * * * * * * * * * 0 h 23 h 0 h

t65 Event 2 Close 1-2 * * * * * * * * * 0 min 59 min 0 min

t66 Monday event 0=Open all day, 1=Close all day,

2=Event 1, 3=Event 2

1-2 * * * * * * * * * 0 3 0

t67 Tuesday event As above 1-2 * * * * * * * * * 0 3 0

t68 Wednesday event As above 1-2 * * * * * * * * * 0 3 0

t69 Thursday event As above 1-2 * * * * * * * * * 0 3 0

t70 Friday event As above 1-2 * * * * * * * * * 0 3 0

t71 Saturday event As above 1-2 * * * * * * * * * 0 3 0

t72 Sunday event As above 1-2 * * * * * * * * * 0 3 0

User Guide | Case/room controller (TXV), AK-CC25 Pro and AK-CC25 Pro BT

Miscellaneous

Code Function Values R-W 1 2 3 4 5 6 7 8 9 Min. Max. Fact.

o01 Delay of outputs at

power-up

1-2 * * * * * * * * * 0 s 600 s 5 s

o02 DI1 Conguration 0=None, 1=DI status, 2=Door

function, 3=Door alarm, 4=Defrost

start, 5=Main switch, 6=Night

setback, 8=Alarm at closed,

9=Alarm at open, 10=Case

cleaning, 11=Forced cooling,

15=Shutdown, 16=Light control,

20=Leak detection, 24=Comp.

safety, 29=Door fan stop,

31=Comp. safety 2, 32=Temp.

pulldown, 33=Operation mode

1-3

(1)

* * * * * * * * 0 33 0

o03 Network address -1 – 240

Note: when used in a network

system with a Danfoss system

manager AK-SM 800A, the address

has to be set in the range 1 – 199.

The Modbus interface can be

disabled by setting the Network

address to -1

1-3

(1)

* * * * * * * * * 0 240 0

o05 Access code 3 -1: Has not been set yet

0: No access code required

1: Access code has been set to a

value in the range 1 – 999

Note: The option of setting the

value to 0 to give access to this

user level without using the access

code is only available in AK-CC25

Pro without Bluetooth.

When set, the access code value

will only be shown for 1 minute

where-after the value is hidden

and cannot be read out by any

interface. Remember to note down

the set access code value.

3-3 * * * * * * * * * 0 999 0

o06 Temperature sensor type 0=Pt 1000, 1=PTC 1000, 2=NTC 5k,

3=NTC 10k, 4=User-dened

1-3

(1)

* * * * * * * * * 0 4 0

o16 Max. hold time 1-2 * * * * * * * * * 0 min 360 min 20 min

o17 Display air S4% 1-2 * * * * * * * * * 0% 100% 100%

o37 DI2 Conguration 0=None, 1=DI status, 2=Door

function, 3=Door alarm,

4=Defrost start, 5=Main switch,

6=Night setback, 8=Alarm

at closed, 9=Alarm at open,

10=Case cleaning, 11=Forced

cooling, 13=Coordinated defrost,

15=Shutdown, 16=Light control,

20=Leak detection, 24=Comp.

safety, 29=Door fan stop,

31=Comp. safety 2, 32=Temp.

pulldown, 33=Operation mode

1-3

(1)

* * * * * * * * * 0 33 0

o38 Light control mode 1=Day and night, 2=Network,

3=Door switch, 4=Network

(Fallback), 5=Digital input

1-2 * * * 1 5 1

o39 MC Light signal 0=OFF, 1=ON 1-2 * * * * * * * * * 0 1 0

o41 Rail heat ON cycle day 1-2 * * * 0% 100% 100%

o42 Rail heat ON cycle night 1-2 * * * 0% 100% 100%

o43 Rail heat period time 1-2 * * * 6 min 60 min 6 min

o46 Case cleaning mode 0=OFF, 1=Fans run, 2=Cleaning 0-1 * * * * * * * * * 0 2 0

User Guide | Case/room controller (TXV), AK-CC25 Pro and AK-CC25 Pro BT

Code Function Values R-W 1 2 3 4 5 6 7 8 9 Min. Max. Fact.

o61 Application mode 1=Comp/def/fan/alarm,

2=Comp/def/fan/light,

3=Comp/def/fan/rail,

4=Comp/def/fan/cond,

5=Two comp/def/alarm,

6=Two comp/def/light,

7=7: Two comp/def/rail,

8=8: Two comp/def/fan,

9=9: Flexible

1-3

(1)

* * * * * * * * * 1 9 1

o64 Access code 2 -1: Has not been set yet

0: No access code required

1: Access code has been set to a

value in the range 1 – 999

Note: The option of setting the

value to 0 to give access to this

user level without using the access

code is only available in AK-CC25

Pro without Bluetooth.

When set, the access code value

will only be shown for 1 minute

where-after the value is hidden

and cannot be read out by any

interface. Remember to note down

the set access code value.

2-2 * * * * * * * * * 0 999 0

o85 Rail heat control mode 0=ON, 1=Day/Night timer,

2=Dewpoint ctrl.

1-2 * * * 0 2 0

o86 Dewpoint min. limit 1-2 * * * -10.0 °C o87 2.0 °C

o87 Dewpoint max. limit 1-2 * * * o86 50.0 °C 12.0 °C

o88 Rail heat min. ON cycle 1-2 * * * 0% 100% 30%

o89 Door restart inj. delay 1-2 * * * * * * * * * 0 min 240 min 30 min

o97 Display readout 1=Display air, 2=S6 Product temp.,

3=Ther. air

1-2 * * * * * * * * * 1 3 1

o98 Light at Main switch OFF 0=OFF, 1=Normal ctrl. 1-2 * * * 0 1 0

oa1 Baudrate 1=Auto, 2=9600 Baud, 3=19200

Baud, 4=38400 Baud, 5=115200

baud

1-3

(1)

* * * * * * * * * 1 5 1

oa2 Parity and stop bit 0=None, 1=Even, 2=Odd 1-3

(1)

* * * * * * * * * 0 2 1

(1)

In order to change this parameter the regulation must be stopped via the parameter r12 Main switch = OFF.

Control

Code Function Values R-W 1 2 3 4 5 6 7 8 9 Min. Max. Fact.

P39 Resonance band start 1-2 * * * * * 0% 100% 100%

P40 Resonance band 1-2 * * * * * 0% 15% 0%

P41 Alarm relay priority 0=Not used, 1=High Priority,

2=Medium priority, 3=All

1-2 * * * 0 3 2

P65 Fan stop at blinds closing 1-2 * * 0 s 300 s 0 s

P77 Oil return speed limit 1-2 * * * * * 0% 100% 40%

P78 Oil return interval 1-2 * * * * * 5 min 720 min 20 min

P79 Oil return speed 1-2 * * * * * P77 100% 50%

P80 Oil return time period 1-2 * * * * * 10 s 600 s 60 s

User Guide | Case/room controller (TXV), AK-CC25 Pro and AK-CC25 Pro BT

Code Function Values R-W 1 2 3 4 5 6 7 8 9 Min. Max. Fact.

P88 Access code 1 -1: Has not been set yet

0: No access code required

1: Access code has been set to

a value in the range 1 – 999

Note: The option of setting

the value to 0 to give access to

this user level without using

the access code is only avail-

able in AK-CC25 Pro without

Bluetooth.

When set, the access code

value will only be shown for 1

minute where-after the value is

hidden and cannot be read out

by any interface. Remember to

note down the set access code

value.

1-1 * * * * * * * * * 0 999 0

P89 Display keyboard lock 0=None, 1=Local, 2=Network 1-2 * * * * * * * * * 0 2 0

P92 Safety action 0=None, 1=Lights o 1-2 * * * 0 1 0

P93 Safety event period 1-2

(1)

* * * * * * * * * 0 h 120 h 0 h

P94 Max safety events 1-2

(1)

* * * * * * * * * 0 20 0

(1)

In order to change this parameter the regulation must be stopped via the parameter r12 Main switch = OFF.

DO cong and manual

Code Function Values R-W 1 2 3 4 5 6 7 8 9 Min. Max. Fact.

q01 DO1 Conguration 0=None, 1=Fans, 3=Defrost,

4=Rail heat, 5=Alarm,

6=Light, 8=Compressor/LLSV,

9=Compressor 2, 10=Air heater,

12=Condenser fan, 13=Drain

heater, 14=Defrost B

1-3

(1)

* 0 14 0

q02 DO2 Conguration As above 1-3

(1)

* 0 14 0

q03 DO3 Conguration As above 1-3

(1)

* 0 14 0

q04 DO4 Conguration As above 1-3

(1)

* 0 14 0

q09 AO1 Conguration 0=None, 3=Comp. speed 1-3

(1)

* * * * * 0 3 0

q12 Compressor 1 - override 0=MAN OFF,

1=MAN ON

1-2

(2)

* * * * * * * * * 0 1 0

q13 Fan - override As above 1-2

(2)

* * * * * * 0 1 0

q14 Defrost A - override As above 1-2

(2)

* * * * * * * * * 0 1 0

q15 Rail heat - override As above 1-2

(2)

* * * 0 1 0

q16 Alarm relay - override As above 1-2

(2)

* * * 0 1 0

q17 Light - override As above 1-2

(2)

* * * 0 1 0

q19 Compressor 2 - override As above 1-2

(2)

* * * * * 0 1 0

q22 Defrost B - override As above 1-2

(2)

* 0 1 0

q23 Air heater - override As above 1-2

(2)

* 0 1 0

q28 High temperature - Priority 0=Disabled, 3=Low,

2=Medium, 1=High

1-2 * * * * * * * * * 0 3 1

q29 Low temperature - Priority As above 1-2 * * * * * * * * * 0 3 1

q30 Sensor errors - Priority As above 1-2 * * * * * * * * * 0 3 1

q31 DI alarms - Priority As above 1-2 * * * * * * * * * 0 3 2

q32 Defrost - Priority As above 1-2 * * * * * * * * * 0 3 3

q33 Miscellaneous - Priority As above 1-2 * * * * * * * * * 0 3 2

q35 Control stopped - Priority As above 1-2 * * * * * * * * * 0 3 3

q36 Leak detection - Priority As above 1-2 * * * * * * * * * 0 3 2

q39 Food temp. sensor 1=Thermostat air, 2=Alarm

air, 3=S3 Air ON evap., 4=S6

Product temp.

1-2

(1)

* * * * * * * * * 1 4 1

User Guide | Case/room controller (TXV), AK-CC25 Pro and AK-CC25 Pro BT

Code Function Values R-W 1 2 3 4 5 6 7 8 9 Min. Max. Fact.

q48 Condenser fan - override 0=MAN OFF, 1=MAN ON 1-2

(2)

* * 0 1 0

q49 Compressor speed - override 1-2

(2)

* * * * * 0% 100% 0%

q52 Drip tray heater override 0=MAN OFF, 1=MAN ON 1-2

(2)

* 0 1 0

q53 Compressor - Priority 0=Disabled, 3=Low,

2=Medium, 1=High

1-2 * * * * * * * * * 0 3 2

q54 Condenser - Priority As above 1-2 * * * * * * * * * 0 3 2

q58 Manage operation modes 0=None, 1=Copy to mode 1,

2=Copy to mode 2, 3=Clear

modes

3-3 * * * * * * * * * 0 3 0

q59 Leak alarm action 0=None, 1=Comp. OFF,

2=Comp OFF/All fans ON,

3=Shutdown

1-2 * * * * * * * * * 0 3 0

q60 AI1 Congration 0=None, 3=S3 Air ON evap.,

4=S4 Air OFF evap., 5=S5 Evap.

temp, 6=S6 Product, 10=S5B

Evap. temp, 15=Sc Condenser

1-3

(1)

* 0 15 0

q61 AI2 Congration As above 1-3

(1)

* 0 15 0

q62 AI3 Congration As above 1-3

(1)

* 0 15 0

q63 AI4 Congration As above 1-3

(1)

* 0 15 0

q80 Display lter time 1-2 * * * * * * * * * 0 s 600 s 0 s

q81 BLE Access level 0=Always access, 1=Level 1,

2=Level 2, 3=Level 3,

4=No access

1-3 * * * * * * * * * 0 4 1

q82 Function keys access level 0=Always access, 1=Level 1,

2=Level 2, 3=Level 3,

4=No access

1-3 * * * * * * * * * 0 4 1

(1)

In order to change this parameter the regulation must be stopped via the parameter r12 Main switch = OFF.

(2)

In order to change this parameter the parameter r12 Main switch must be set in position “SEr” allowing manual control of outputs.

Service

Code Function Values R-W 1 2 3 4 5 6 7 8 9 Min. Max. Fact.

u00 Control state 0=Normal ctrl., 1=Hold after

defrost, 2=Min ON timer, 3=Min

OFF timer, 4=Drip o, 10=Main

switch OFF, 11=Thermostat

cut-out, 12=Frost protection

S4, 14=Defrost, 15=Fan delay,

17=Door open, 18=Melt

period, 19=Modulating temp.

control, 20=Emergency control,

25=Manual control, 29=Case

cleaning, 30=Forced cooling,

32=Power-up delay, 33=Air

heating, 34=Comp. safety

cut-out, 41=High Sc temp.,

45=Shut down controller,

50=High S7 Brine inlet, 51=Oil

recovery, 52=Temp. pulldown,

53=Comp. Lockout, 54=Leak

action, 55=Wrong IO cong

0-X * * * * * * * * * 0 55 0

u09 S5 Evaporator A 0-X * * * * * * * * * -200 °C 200 °C 0 °C

u10 DI1 Status 0=OFF, 1=ON 0-X * * * * * * * * * 0 1 0

u11 Defrost time 0-X * * * * * * * * * 0 min 900 min 0 min

u12 S3 Air ON evap. 0-X * * * * * * * * * -200 °C 200 °C 0 °C

u13 Night condition 0=OFF, 1=ON 0-X * * * * * * * * * 0 1 0

u16 S4 Air OFF evap. 0-X * * * * * * * * * -200 °C 200 °C 0 °C

u17 Thermostat air temp. 0-X * * * * * * * * * -200 °C 200 °C 0 °C

u18 Thermostat run time 0-X * * * * * * * * * 0 min 999 min 0 min

u36 S6 product temp. 0-X * -200 °C 200 °C 0 °C

u37 DI2 Status 0=OFF, 1=ON 0-X * * * * * * * * * 0 1 0

User Guide | Case/room controller (TXV), AK-CC25 Pro and AK-CC25 Pro BT

Code Function Values R-W 1 2 3 4 5 6 7 8 9 Min. Max. Fact.

u52 Compressor speed 0-X * * * * * 0% 100% 0%

u56 Display readout 0-X * * * * * * * * * -200 °C 200 °C 0 °C

u57 Alarm air temp. 0-X * * * * * * * * * -200 °C 200 °C 0 °C

u58 Compressor 1 0=OFF, 1=ON 0-X * * * * * * * * * 0 1 0

u59 Fan 0=OFF, 1=ON 0-X * * * * * * 0 1 0

u60 Defrost A 0=OFF, 1=ON 0-X * * * * * * * * * 0 1 0

u61 Rail heat 0=OFF, 1=ON 0-X * * * 0 1 0

u62 Alarm relay 0=OFF, 1=ON 0-X * * * 0 1 0

u63 Light 0=OFF, 1=ON 0-X * * * 0 1 0

u67 Compressor 2 0=OFF, 1=ON 0-X * * * * * 0 1 0

u75 S5 Evaporator B 0-X * -200 °C 200 °C 0 °C

u81 Drip tray heater 0=OFF, 1=ON 0-X * 0 1 0

u83 Defrost B 0=OFF, 1=ON 0-X * 0 1 0

u84 Air heater 0=OFF, 1=ON 0-X * 0 1 0

u85 Rail heat power 0-X * * * 0% 100% 0%

u90 Thermostat cut-in temp. 0-X * * * * * * * * * -200 °C 200 °C 4.0 °C

u91 Thermostat cut-out temp. 0-X * * * * * * * * * -200 °C 200 °C 2.0 °C

U09 Sc Condenser temp. 0-X * * -200 °C 200 °C 0.0 °C

U16 Condenser fan 0=OFF, 1=ON 0-X * * 0 1 0

U45 Network status 0-X * * * * * * * * * 0% 100% 0%

U72 Food temperature 0-X * * * * * * * * * -200 °C 200 °C 0 °C

U73

Defrost sensor temperature A

0-X * * * * * * * * * -200 °C 200 °C 0 °C

U93 Defrost sensor temperature B 0-X * -200 °C 200 °C 0 °C

ua1 Operation mode 0=None, 1=Mode 1, 2=Mode 2 0-X * * * * * * * * * 0 2 0

ua2 Average defrost time 0-X * * * * * * * * * 0 min 600 min 0 min

User Guide | Case/room controller (TXV), AK-CC25 Pro and AK-CC25 Pro BT

Start / Stop

Conguration

AK-CC Connect App menu

Parameters

Code Function Description Values Short name

r12 Main switch Start / stop of refrigeration. With this setting refrigeration can

be started, stopped or a manual override of the outputs can

be allowed. (For manual control the value is set at -1). Then the

outputs can be force controlled. Start / stop of refrigeration

can also be accomplished with the external switch function

connected to a DI input.Stopped control will give a ”Main switch

OFF" alarm.

Be aware, Some conguration parameters requires that Main

switch is set in OFF position in order to be changed.

-1=Manual,

0=Stop,

1=Start

r12 Main switch

o01 Delay of outputs at

power-up

Delay of output signal after start-up After start-up or a power

failure the controller’s functions can be delayed so that

overloading of the electricity supply network is avoided. Here you

can set the time delay.

o01 DelayOfOutp.

Code Function Description Values Short name

r12 Main switch Start / stop of refrigeration. With this setting refrigeration can

be started, stopped or a manual override of the outputs can

be allowed. (For manual control the value is set at -1). Then the

outputs can be force controlled. Start / stop of refrigeration

can also be accomplished with the external switch function

connected to a DI input.Stopped control will give a ”Main switch

OFF" alarm.

Be aware, Some conguration parameters requires that Main

switch is set in OFF position in order to be changed.

-1=Manual,

0=Stop,

1=Start

r12 Main switch

o61 Application mode Selection of application

The controller covers several applications for control of a

refrigerated case. Here you set which of the possible applications

is required.This menu can only be set when regulation is stopped,

i.e. “r12 Main Switch” is set to 0.

1=1: Comp/def/fan/alarm,

2=2: Comp/def/fan/light,

3=3: Comp/def/fan/rail,

4=4: Comp/def/fan/cond,

5=5: Two comp/def/alarm,

6=6: Two comp/def/light,

7=7: Two comp/def/rail,

8=8: Two comp/def/fan,

9=9: Flexible

o61 Appl. mode

q01 DO1 Conguration Select the function of the digital output

It is recommended to use this output for the compressor

The relay rating for this output is:

DO1 SPST (1-NO)

DO1 CE 10(10)A, UL 10A/10FLA/60LRA

0=None, 1=Fans,

3=Defrost, 4=Rail heat,

5=Alarm, 6=Light,

8=Compressor/LLSV,

9=Compressor 2,

10=Air heater,

12=Condenser fan,

13=Drain heater,

14=Defrost B

q01 DO1 Cong.

q02 DO2 Conguration Select the function of the digital output

It is recommended to use this output for defrost heaters, hot gas

valve, light/night cutains.When used for light control, the light

shall be connected to the NC terminal no. 7 ensuring that light is

turned on in case of power failure to the controller

The relay rating for this output is:

DO2 SPDT (1-C/O)

DO2 CE 10(10)A, UL 10A/10FLA/60LRA

As DO1 Conguration q02 DO2 Cong.

q03 DO3 Conguration Select the function of the digital output

It is recommended to use this output for the evaporator or

condenser fans at it is capable of handling high in-rush currents

from ECM motors

The relay rating for this output is:

DO3 SPST (1-NO)

DO3 CE 6(5)A, UL 6A/5FLA/30LRA

As DO1 Conguration q03 DO3 Cong.

User Guide | Case/room controller (TXV), AK-CC25 Pro and AK-CC25 Pro BT

Code Function Description Values Short name

q04 DO4 Conguration Select the function of the digital output

This output has a higher insulation degree, so that low voltage

systems can be connected to this output.It is recommended to

use this output for especially alarm circuit and light circuit, as the

ralay have double contacts. When used for alarm/light control,

the alarm/light shall be connected to the NC terminal no. 12

ensuring that alarm/light is turned on in case of power failure to

the controller

The relay rating for this output is:

DO4 SPDT (1-C/O)

DO3 CE 6(5)A, UL 6A/5FLA/30LRA

As DO1 Conguration q04 DO4 Cong.

q09 AO1 Conguration Select the function of the analogue output 0=None,

3=Comp. speed

q09 AO1 Cong.

q60 AI1 Congration Select the function of the analogue input 0=None,

3=S3 Air ON evap.,

4=S4 Air OFF evap.,

5=S5 Evap. temp,

6=S6 Product,

10=S5B Evap. temp,

15=Sc Condenser

q60 AI1 Cong.

q61 AI2 Congration Select the function of the analogue input As AI1 Conguration q61 AI2 Cong.

q62 AI3 Congration Select the function of the analogue input As AI1 Conguration q62 AI3 Cong.

q63 AI4 Congration Select the function of the analogue input As AI1 Conguration q63 AI4 Cong.

o02 DI1 Conguration Select the function of the digital input 0=None,

1=DI status,

2=Door function,

3=Door alarm,

4=Defrost start,

5=Main switch,

6=Night setback,

8=Alarm at closed,

9=Alarm at open,

10=Case cleaning,

11=Forced cooling,

13=Coordinated defrost,

15=Shutdown,

16=Light control,

20=Leak detection,

24=Comp. safety,

29=Door fan stop,

31=Comp. safety 2,

32=Temp. pulldown,

33=Operation mode

o02 DI1 Cong.

o37 DI2 Conguration Select the function of the digital input As DI1 Conguration o37 DI2 Cong.

o06 Temperature sensor

type

Sensor type for S3, S4 and S5. Normally a Pt 1000 sensor with

great signal accuracy is used. But you can also use a sensor with

another signal accuracy. That could e.g. be a PTC sensor (1000

ohm at 25°C) All the mounted sensors S3-S5 must be of the same

type

0=Pt 1000,

1=PTC 1000,

2=NTC 5k,

3=NTC 10k,

4=User-dened

o06 SensorCong

X20 Sensor point 1 -

Temp.

The temperature value for the user-dened temperature sensor in

the reference point

--- SP1 Temp

X21 Sensor point 1 -

kohm

The resistance value in kohm for the user-dened temperature

sensor in the reference point

--- SP1 kohm

X22 Sensor point 1 - ohm The resistance value in ohm for the user-dened temperature

sensor in the reference point

--- SP1 ohm

X23 Sensor point 2 -

Temp.

The temperature value for the user-dened temperature sensor in

the reference point

--- SP2 Temp

X24 Sensor point 2 -

kohm

The resistance value in kohm for the user-dened temperature

sensor in the reference point

--- SP2 kohm

X25 Sensor point 2 - ohm The resistance value in ohm for the user-dened temperature

sensor in the reference point

--- SP2 ohm

X26 Sensor point 3 -

Temp.

The temperature value for the user-dened temperature sensor in

the reference point

--- SP3 Temp

X27 Sensor point 3 -

kohm

The resistance value in kohm for the user-dened temperature

sensor in the reference point

--- SP3 kohm

User Guide | Case/room controller (TXV), AK-CC25 Pro and AK-CC25 Pro BT

Code Function Description Values Short name

X28 Sensor point 3 - ohm The resistance value in ohm for the user-dened temperature

sensor in the reference point

--- SP3 ohm

c08 Step control mode Selection of step control mode for compressors. Sequential and

cyclic mode are used when both compressors are on the same

refrigeration cicuit

. At sequential mode compressor 1 will always

be the rst to start and the last to stop

. In cyclic mode the run

time between the compressor will be equalized

. At dual circuit,

each compressor is working on their own individual refrigeration

circuit and both compressors are alwaysh running at the same

time and only have a step delay between them when starting

1=Sequential,

2=Cyclic,

3=Dual circuits

c08 Step mode

d01 Defrost method Select method of defrost 0=None,

1=Electrical,

2=Hot gas,

4=Air/Ocycle,

5=Electrical pulsing

d01 Def. method

d10 Defrost stop method Here you dene whether a defrost cycle is to be stopped by time

or by a temperature sensor

0=Time,

1=S5 sensor,

2=S4 sensor,

3=S5A and S5B

d10 DefStopSens.

d02 Defrost stop limit When the selected defrost stop sensor reaches the set limit, the

defrost cycle is terminated

d02 Def.StopTemp

r89 Food type When changing the food type the controller will automatically

adapt temperature setpoints and alarm limits according to the

selected food type. Please be aware that the setting will revert to

“None" after having been changed.

0=None, 1=Vegetables,

2=Dairy, 3=Meat and sh,

4=Frozen food, 5=Ice cream

r89 Food type

q39 Food temp. sensor Select the temperature to be used for the food temperature

representation

1=Thermostat air,

2=Alarm air,

3=S3 Air ON evap.,

4=S6 Product temp.

q39 Food sensor

o03 Network address Network address of the controller o03 Unit addr.

U61 DO1 Function Function on DO1 U61 DO1 Cong.

U62 DO2 Function Function on DO2 U62 DO2 Cong.

U63 DO3 Function Function on DO3 U63 DO3 Cong.

U64 DO4 Function Function on DO4 U64 DO4 Cong.

Y55 DI1 Function Function on DI1 Y55 DI1 Cong

Y56 DI2 Function Function on DI2 Y56 DI2 Cong

Y58 AI1 Function Sensor on AI1 Y58 AI1 Cong

Y59 AI2 Function Sensor on AI2 Y59 AI2 Cong

Y60 AI3 Function Sensor on AI3 Y60 AI3 Cong

Y61 AI4 Function Sensor on AI4 Y61 AI4 Cong

U69 AO1 Function Function on AO1 U69 AO1 Cong.

User Guide | Case/room controller (TXV), AK-CC25 Pro and AK-CC25 Pro BT

Thermostat control

Code Function Description Values Short name

u00 Control state Readout of the actual control state of the controller 0=Normal ctrl.,

1=Hold after defrost,

2=Min ON timer,

3=Min OFF timer,

4=Drip o,

10=Main switch OFF,

11=Thermostat cut-out,

12=Frost protection S4,

14=Defrost,

15=Fan delay,

17=Door open,

18=Melt period,

19=Modulating temp. ctrl,

20=Emergency control,

25=Manual control,

29=Case cleaning,

30=Forced cooling,

32=Power-up delay,

33=Air heating,

34=Comp. safety cut-out,

41=High Sc temp.,

45=Shut down controller,

51=Oil recovery,

52=Temp. pulldown,

53=Comp. Lockout,

54=Leak action,

55=Wrong IO cong

u00 Ctrl. state

u17 Thermostat air temp. Thermostat temperature u17 Ther. air

U72 Food temperature Readout of food temperature U72 Food temp.

u12 S3 Air ON evap. Actual temperature of S3 Air ON sensor placed in air ow before

evaporator

u12 S3 air temp.

u16 S4 Air OFF evap. Actual temperature of S4 Air OFF sensor placed in air ow after

evaporator

u16 S4 air temp.

u36 S6 product temp. Actual temperature of S6 Product sensor placed at a position to

represent temperature of stored food

u36 S6 temp.

u13 Night condition Status of the day/night operation (night operation: on/o) 0=OFF, 1=ON u13 Night Cond.

X31 Air temp.

performance

Average air temperature performance of the unit in the last 24

hours. A high value means that the average air temperature for

the majority of time has been within the thermostat operational

band

--- TQAvgTmpPerf

X30 Average air temp. Average thermostat air temperature for the last 24 hours --- TQAvgAirTemp

u84 Air heater Actual status of air heater output 0=OFF, 1=ON u84 Heat relay

ua1 Operation mode Read-out of the current operation mode 0=None,

1=Mode 1, 2=Mode 2

Ua1 Operate Mode

u90 Thermostat cut-in

temp.

Readout of the actual cut-in value for the thermostat u90 Cutin temp.

u91 Thermostat cut-out

temp.

Readout of the actual cut-out value for the thermostat u91 Cutout temp.

u18 Thermostat run time Read the ongoing cut-in time for the thermostat or the duration

of the last completed cut-in

u18 Ther runtime

X70 Door openings 24h Number of door openings for the last 24 hours --- DoorOpen24h

X71 Door open time 24h Accumulated door opening time for the last 24 hours --- DoorTime24h

r14 Thermostat mode Operation mode of the thermostat

Either as an ordinary ON/OFF thermostat or as a modulating

thermostat with variable speed compressor. The thermostat dif-

ferential (r01) shall not be set lower than 2K for a variable speed

compressor

1=ON/OFF

2=Modulating,

r14 Therm. mode

r00 Cut-out 1 Setpoint. The thermostat’s cut-out limit r00 Cutout

r01 Dierential When the temperature is higher than the set cut-out + the set dif-

ferential, the compressor relay will be cut-in. It will cut-out again

when the temperature comes down to the set cut-out limit

r01 Dierential

r02 Max cut-out limit Setpoint limitation - The controller’s setting range for the thermo-

stat setpoint may be narrowed down, so that too high or too low

values are not set accidentally - with resulting damages.

r02 Max cutout

User Guide | Case/room controller (TXV), AK-CC25 Pro and AK-CC25 Pro BT

Code Function Description Values Short name

r03 Min cut-out limit Setpoint limitation - The controller’s setting range for the thermo-

stat setpoint may be narrowed down, so that too high or too low

values are not set accidentally - with resulting damages.

r03 Min cutout

r15 Thermostat sensor

S4%

Selection of thermostat sensor. Here you dene the sensor that

the thermostat is to use for its control function. S3, S4, or a com-

bination of them. With the setting 0%, only S3 is used. With 100%,

only S4.

r15 Ther. S4%

r61 Thermostat sensor

S4% night

Selection of thermostat sensor S4% during night operation with

night blinds. Here you dene the sensor that the thermostat is to

use for its control function. S3, S4, or a combination of them. With

the setting 0%, only S3 is used. With 100%, only S4.

r61 Ther.S4% Ngt

r13 Night oset Night setback value.The thermostat’s reference will be the set-

point plus this value when the controller changes over to night

operation.

r13 Night oset

ra1 Temp. pulldown di Temperature dierential for temperature pulldown. How many

degrees shall the thermostat temperature be pulled below the

normal thermostat set point

ra1 Temp PD di

ra2 Temp. pulldown time Duration of temperature pulldown cycle ra2 Temp PD time

r98 S4 frost protection Frost protection on S4 air temperature. If the S4 temperature sen-

sor measure a temperature lower than the set limit, refrigeration

will be stopped in order to protect products from ice formation.

Refrigeration will start again when the S4 temperature has risen

2K above the set limit

r98 S4 Min Lim

r62 Air heater neutral

zone

Heat function. Set the width of the Neutral Zone for changeover

from cooling to heating

r62 Heat NZ

r63 Air heater start delay Time delay on transition from refrigeration phase to heating

phase (there is no time delay on transition from heating phase to

refrigeration)

r63 HeatStartDel

r16 Melt interval Melt function. Only for control of MT cases/rooms (-5 to +10 °C).

The function ensures that the evaporator will not be blocked by

ice crystals. Here you set how often the function is to stop the

refrigeration and hence transform the ice crystals to water.

r16 MeltInterval

r17 Melt period Melt period. Here you set how long an ongoing melt function is

to last

r17 Melt period

X32 Temp. oset Temperature oset value used to calculate temperature per-

formance. Air temperature has 100% performance within the

cutIn+Oset and cutOut-Oset band

--- TQTempOset

Day/Night schedule

Code Function Description Values Short name

t58 Event 1 Day h Start day time in hours t58 Event1 Open

t59 Event 1 Day min Start day time in min t59 Event1 Open

t60 Event 1 Night h Start night-time in hours t60 Event1 Close

t61 Event 1 Night min Start night-time in min t61 Event1 Close

t62 Event 2 Day h Start day time in hours t62 Event2 Open

t63 Event 2 Day min Start day time in min t63 Event2 Open

t64 Event 2 Night h Start night-time in hours t64 Event2 Close

t65 Event 2 Night min Start night-time in min t65 Event2 Close

t66 Monday event Select scheduled event for Mondays 0=Day,

1=Night,

2=Event 1

3=Event 2

t66 Mon Event

t67 Tuesday event Select scheduled event for Tuesdays As Monday t67 Tue Event

t68 Wednesday event Select scheduled event for Wednesdays As Monday t68 Wed Event

t69 Thursday event Select scheduled event for Thursdays As Monday t69 Thu Event

t70 Friday event Select scheduled event for Fridays As Monday t70 Fri Event

t71 Saturday event Select scheduled event for Saturdays As Monday t71 Sat Event

t72 Sunday event Select scheduled event for Sundays As Monday t72 Sun Event

User Guide | Case/room controller (TXV), AK-CC25 Pro and AK-CC25 Pro BT

Alarm limits and delays

Code Function Description Values Short name

u00 Control state Readout of the actual control state of the controller See earlier u00 Ctrl. state

x16 Alarm status Actual alarm status 0=OFF, 1=ON --- Sum alarm

u57 Alarm air temp. Measured temperature for alarm thermostat u57 Alarm air

y10 High alarm limit Readout of actual high alarm limit for the temperature monitoring --- High al. lim

y11 Low alarm limit Readout of actual low alarm limit for the temperature monitoring --- Low al. lim

u12 S3 Air ON evap. Actual temperature of S3 Air ON sensor placed in air ow before

evaporator

u12 S3 air temp.

u16 S4 Air OFF evap. Actual temperature of S4 Air OFF sensor placed in air ow after

evaporator

u16 S4 air temp.

u10 DI1 Status Actual signal status of the digital input DI1 0=OFF, 1=ON u10 DI1 status

u37 DI2 Status Actual signal status of the digital input DI2 0=OFF, 1=ON u37 DI2 status

x15 Reset alarms Command for resetting all alarms, unless they are still active.

Alarms can also be reset by a long press on the display alarm

button while being in the alarm list

0=OFF, 1=ON --- Reset alarm

A36 Alarm sensor S4% Signal to the alarm thermostat Here you have to dene the ratio

between the sensors which the alarm thermostat has to use. S3,

S4 or a combination of the two. With setting 0% only S3 is used.

With 100% only S4 is used

A36 Alarm S4%

A13 High alarm limit Upper alarm limit. The limit value is set in absolute value. The

limit value will be raised with the night oset during night

operation.

A13 HighLim Air

A14 Low alarm limit Lower alarm limit. The limit value is set in absolute value A14 LowLim Air

A03 Alarm delay Alarm delay (short alarm delay on air temperature). If the upper

or the lower alarm limit values are exceeded, a timer function will

commence. The alarm will not become active until the set time

delay has been passed. The time delay is set in min

A03 Alarm delay

A12 Alarm delay pull

down

Alarm delay at tempeature pull down conditions (long alarm

delay). This time delay is used during start-up, during defrost and

immediately after a defrost. There will be a change-over to the

normal time delay when the temperature has dropped below the

set upper alarm limit.

A12 Pulldown del

A04 Door open alarm

delay

Time delay for door alarm A04 DoorOpen del

o89 Door restart inj. delay Start of refrigeration when the door is open. If the door has been

left open, refrigeration will be started after the set time.

o89 DoorInjStart

A27 Alarm delay DI 1 Time delay for digital input alarm A27 Al.Delay DI1

A28 Alarm delay DI 2 Time delay for digital input alarm A28 Al.Delay DI2

Defrost control

Code Function Description Values Short name

u00 Control state Readout of the actual control state of the controller See earlier u00 Ctrl. state

U73 Defrost sensor

temperature A

Actual temperature of selected defrost stop sensor U73 Def.StopTemp

U93 Defrost sensor

temperature B

Actual temperature of selected defrost stop sensor S5B U93 Def.StopTemB

u09 S5 Evaporator A Actual temperature of S5A Evaporator sensor placed inside

evaporator

u09 S5 temp.

u75 S5 Evaporator B Actual temperature of S5B Evaporator sensor placed inside

evaporator

u75 S5 temp. B

u60 Defrost A Actual status of defrost heater A output 0=OFF, 1=ON u60 Def. relay

u83 Defrost B Actual status of defrost heater B output 0=OFF, 1=ON u83 Def. relay B

u81 Drip tray heater Actual status of drip tray heater output 0=OFF, 1=ON u81Drip tray

u11 Defrost time Read the duration of the ongoing defrost or the duration of the

last completed defrost.

u11 Defrost time

ua2 Average defrost time The average defrost time for the last 10 defrosts ua2 Avr Def Time

x09 Start defrost Command for starting a defrost 0=OFF, 1=ON --- Def. Start

User Guide | Case/room controller (TXV), AK-CC25 Pro and AK-CC25 Pro BT

Code Function Description Values Short name

x10 Stop defrost Command for stopping an ongoing defrost cycle 0=OFF, 1=ON --- Def. Stop

d01 Defrost method Select method of defrost 0=None,

1=Electrical,

2=Hot gas,

4=Air/Ocycle,

5=Electrical pulsing

d01 Def. method

d10 Defrost stop method Here you dene whether a defrost cycle is to be stopped by time

or by a temperature sensor

0=Time,

1=S5 sensor,

2=S4 sensor,

3=S5A and S5B

d10 DefStopSens.

d02 Defrost stop limit When the selected defrost stop sensor reaches the set limit, the

defrost cycle is terminated

d02 Def.StopTemp

d24 Min. defrost time Minimum duration of a defrost cycle. The defrost cycle will as a

minimum run for the set minimum defrost time once it is started

d24 Min Def Time

d04 Max. defrost time Max duration of a defrost cycle. The setting is also used as a safety

time if the defrost is stopped on temperature. If the selected defrost

stop sensor does not reach the set defrost stop temperature limit

within the set time, the defrost will be stopped anyway.

d04 Max Def.time

d03 Defrost start interval The function is zeroset and will start the timer function at

each defrost start. When the time has expired the function

will start a defrost. The function is used as a simple defrost

start, or it may be used as a safeguard if the normal signal fails

to appear. If master/slave defrost without clock function or

without data communication is used, the interval time will be

used as max. time between defrosts. If a defrost start via data

communcation does not take place, the interval time will be

used as max. time between defrosts.When there is defrost with

clock function or data communication, the interval time must

be set for a somewhat longer period of time than the planned

one. In connection with power failure the interval time will be

maintained, and when the power returns the interval time will

continue from the maintained value. he interval time is not active

when set to 0

d03 Def.Interval

d05 Time staggering

power-up

Time staggering for defrost cut-ins during start-up The function

is only relevant if you have several refrigeration appliances or

groups where you want the defrost to be staggered in relation to

one another. The function is furthermore only relevant if you have

chosen defrost with interval start. The function delays the interval

time by the set number of min, but it only does it once, and this

at the very rst defrost taking place when voltage is connected

to the controller. The function will be active after each and every

power failure.

d05 Time stagg.

d18 Max. thermostat run

time

Defrost on demand. Aggregate refrigeration time set here is the

refrigeration time allowed without defrosts. If the time is passed, a

defrost will be started. With setting = 0 the function is not in use.

d18 MaxTherRunT.

d19 DOD S5 dierential The controller monitor the eciency of the evaporator, and via

internal calculations and measurements of the S5 temperature,

it will start a defrost if the S5 temperature at thermostat cut-out

has dropped with the set dierential compared to when the

evaporator is clean. The feature will only perform a defrost during

daytime conditions. The feature is not enabled if a variable speed

compressor is congured. If the value is set at 20K, the feature is

disabled.

d19 CutoutS5Dif.

d16 Pump down delay When defrost mode is selected for Hotgas, the compressor

will run during the pump down delay to build up pressure and

accumulate heat

d16 Pump dwn del

d42 Pressure equalization

delay

Pressure equalization delay for hot gas defrost on plug-in

cabinets. During pressure equalization state the hot gas valve is

open in order to equalize pressure in the system.

d42 Press. Equal

d06 Drip o time Here you set the time that is to elapse from a defrost state ends

and until the compressor is to start again. (The time when water

drips o the evaporator).

d06 DripO time

d43 Hot gas valve at drip Select whether hot gas valve shall be ON or OFF during drip state.

This provides the option of having a drain heater connected to

the hot gas valve output.

0=OFF, 1=ON d43 HG ValveDrip

d20 Drip tray heater delay The drip try heater will go ON when a defrost cycle is initiated and

it will go OFF again when the set time delay has expired after the

drip state

d20 DripTray del

User Guide | Case/room controller (TXV), AK-CC25 Pro and AK-CC25 Pro BT

Defrost schedules

Code Function Description Values Short name

t00 Defrost schedule 0=No, 1=Yes t00 Def.Schedule

t01 Def. start 1 - Hours Time in hours for start of defrost t01 Def. 1 hr.

t11 Def. start 1 - Min Time in min for when defrost cycle is to be started t11 Def. 1 min.

t02 Def. start 2 - Hours Time in hours for start of defrost t02 Def. 2 hr.

t12 Def. start 2 - Min Time in min for when defrost cycle is to be started t12 Def. 2 min.

t03 Def. start 3 - Hours Time in hours for start of defrost t03 Def. 3 hr.

t13 Def. start 3 - Min Time in min for when defrost cycle is to be started t13 Def. 3 min.

t04 Def. start 4 - Hours Time in hours for start of defrost t04 Def. 4 hr.

t14 Def. start 4 - Min Time in min for when defrost cycle is to be started t14 Def. 4 min.

t05 Def. start 5 - Hours Time in hours for start of defrost t05 Def. 5 hr.

t15 Def. start 5 - Min Time in min for when defrost cycle is to be started t15 Def. 5 min.

t06 Def. start 6 - Hours Time in hours for start of defrost t06 Def. 6 hr.

t16 Def. start 6 - Min Time in min for when defrost cycle is to be started t16 Def. 6 min.

t51 Monday - Follow

schedule

Shall schedule apply for Monday 0=No, 1=Yes t51 Mon.Schedule

t52 Tuesday - Follow

schedule

Shall schedule apply for Tuesday 0=No, 1=Yes t52 Tue.Schedule

t53 Wednesday - Follow

schedule

Shall schedule apply for Wednesday 0=No, 1=Yes t53 Wed.Schedule

t54 Thursday - Follow

schedule

Shall schedule apply for Thursday 0=No, 1=Yes t54 Thu.Schedule

Code Function Description Values Short name

o16 Max. hold time Max. standby time after coordinated defrost. When a controller

has completed a defrost it will wait for a signal tellingthat the

refrigeration may be resumed. If this signal fails to appear for one

reason or another, the controller itself will start the refrigeration

when the standby time has elapsed.

o16 MaxHoldTime

d09 Fan control during

defrost

Fan operation during defrost Here you can set how the fan is to

operate during defrost.

0: Stopped (runs during pump down)

1: Running (stopped during "fan delay”)

2: Running during pump down and defrost. After that stopped

3: Running during pump down and defrost until defrost stop

sensor reaches fan stop temperature limit

0=OFF,

1=ON,

2=OFF at drip,

3=OFF at high temp

d09 FanDuringDef

d07 Fan start delay Delay of fan start after defrost. Here you set the time that is to

elapse from compressor start after a defrost and until the fan may

start again. (The time when remaining water is transformed into

ice on the evaporator).

d07 FanStartDel

d08 Fan start temperature Temperature limit for starting the fans after a defrost. When the

measured S5 evaporator temperature is getting below the set

limit, the fans are started

d08 FanStartTemp

d41 Fan stop temperature If the fan control during defrost has been set up for it, the fans can

be stopped during the defrost if the defrost sensor exceeds the

set temperature limit

d41 Def Fan Stop

d27 Rail heat during

defrost

Dene how rail heat is controlled during defrost0: Rail heat is OFF

all the time1: Rail heat is ON all the time2: Normal rail heat control

0=OFF, 1=ON, 2=Normal

control

d27 Railh.at def

d45 Cond. fan at defrost Select whether the condenser fan shall run normal control or stop

during a hot gas defrost

0=OFF, 1=Normal ctrl. d45 Cond At Def

d40 Display delay after

defrost

Set the maximum time the display should show the defrost code

"-d-" after a defrost. The normal temperature readout is normally

started when the temperature in the case is OK again or if a high

temperature alarm is raised.

d40 Disp. d del.

d44 Temp. pulldown after

defrost

Select whether a temperature pull down sequence shall be

run once the defrost sequence is terminated. By running a

temperature pulldown, the refrigerated goods will regain optimal

storage temperature in a fast manner

0=No, 1=Yes d44 PD After Def

User Guide | Case/room controller (TXV), AK-CC25 Pro and AK-CC25 Pro BT

Compressor

Code Function Description Values Short name

u00 Control state Readout of the actual control state of the controller See earlier u00 Ctrl. state

u17 Thermostat air temp. Thermostat temperature u17 Ther. air

u90 Thermostat cut-in

temp.

Readout of the actual cut-in value for the thermostat u90 Cutin temp.

u91 Thermostat cut-out

temp.

Readout of the actual cut-out value for the thermostat u91 Cutout temp.

u58 Compressor 1 Actual status of compressor 1 output 0=OFF, 1=ON u58 Comp1/LLSV

u67 Compressor 2 Actual status of compressor 2 output 0=OFF, 1=ON u67 Comp2 relay

u52 Compressor speed Actual compressor speed in percentage of max speed u52 Comp. Cap.

X35 Average comp. cap. Average compressor capacity of the unit in the last 24 hours --- CPAvgCompCap

c01 Min ON time Minimum time the compressor is to run once it has been started. c01 Min. On time

c02 Min OFF time Minimum time the compressor has to be stopped c02 Min.O time

c05 Delay between comp. Time delay for couplings of two compressors. The step delay is the

time that has to elapse from the rst compressor starts and until

the next compressor starts

c05 Step delay

c08 Step control mode Selection of step control mode for compressors. Sequential and

cyclic mode are used when both compressors are on the same

refrigeration cicuit

. At sequential mode compressor 1 will always

be the rst to start and the last to stop

. In cyclic mode the run

time between the compressor will be equalized

. At dual circuit,

each compressor is working on their own individual refrigeration

circuit and both compressors are alwaysh running at the same

time and only have a step delay between them when starting

1=Sequential,

2=Cyclic,

3=Dual circuits

c08 Step mode

c97 Comp. defrost speed The compressor will run with the dened speed during the hot

gas defrost

c97 DefrostSpeed

c99 Comp cut-out delay The time the thermostat air temperature is allowed to be

below the thermostat cut-out limit before the variable speed

compressor is stopped

c99 CmpCutOutDel

c49 Stop speed Frequency signal for stopping the compressor c49 Stop Speed

c46 Minimum speed Frequency signal at minimum allowed compressor speed c46 Min Speed

c47 Start speed Frequency signal at start speed of compressor. Once started the

compressor will run at this speed for 10 sec, before the variable

speed control starts

c47 Start Speed

c48 Max speed Frequency signal at maximum allowed compressor speed c48 Max Speed

c96 Max. speed slope Limitation on how fast the speed can ramp up/down (set in% per.

second)

c96 MaxSlopeRate

c82 Speed Kp Amplication factor Kp for PI control of speed c82 Speed Kp

c83 Speed Tn Integration factor Tn for PI control of speed c83 Speed Tn

c98 Max. Kp factor Max. Kp value at high deviation from the temperature setpoint c98 Speed Kp Max

P79 Oil return speed Set the speed at which the compressor will run during an oil

return cycle

P79 OilRtrnSpeed

P80 Oil return time period Set the time period for which the compressor will run at increased

speed during an oil return cycle

P80 OilRtPeriod

P77 Oil return speed limit If the compressor is running below the set speed limit, an oil

return counter is increased. When the counter reaches the dened

"Oil return cycle time", an oil return cycle will be initiated

P77 OilRtSpdLim

P78 Oil return interval When the counter for low speed operation reaches this value, an

oil return cycle is initiated

P78 OilRtIntrval

P39 Resonance band start Variable speed level at which the resonance band starts P39 Reson. start

Code Function Description Values Short name

t55 Friday - Follow

schedule

Shall schedule apply for Friday 0=No, 1=Yes t55 Fri.Schedule

t56 Saturday - Follow

schedule

Shall schedule apply for Saturday 0=No, 1=Yes t56 Sat.Schedule

t57 Sunday - Follow

schedule

Shall schedule apply for Sunday 0=No, 1=Yes t57 Sun.Schedule

User Guide | Case/room controller (TXV), AK-CC25 Pro and AK-CC25 Pro BT

Code Function Description Values Short name

P40 Resonance band Width of the resonance band P40 Reson. band

P94 Max safety events The maximum number of repeated compressor safety or con-

denser block safety events before the compressors are locked

out and a manual alarm reset is required to restart compressor

operation. Setting the value at 0 will disable compressor lock out

feature.

P94 SafetyEvents

P93 Safety event period Time period for counting maximum number of allowed safety

events for compressor safety and condenser block safety. Setting

the value at 0 will disable compressor lock out feature.

P93 SafetyPeriod

P92 Safety action Select the action taken if repeated condenser block alarms result

in lockout of compressors

0=None, 1=Lights o P92 SafetyAction

Condenser control

Code Function Description Values Short name

u00 Control state Readout of the actual control state of the controller See earlier u00 Ctrl. state

U09 Sc Condenser temp. Actual temperature of the Sc Codenser sensor placed on the air

cooled condenser

U09 Sc2 temp.

U16 Condenser fan Actual status of the condenser fan output 0=OFF, 1=ON U16 Cond. fan

F24 Cond. fan cut-in Temperature setting at which the condenser fan is started F24 Cond. Cutin

F25 Cond. fan di. Temperature dierential for stopping condenser fan F25 Cond. di.

A37 Cond. alarm limit Setpoint for the condenser temperature alarm, the warning level

resulting in reduction in compressor capacity (if possible). The

alarm will clear when the condenser temperature is decreased

with the set alarm dierential

A37 CondAlarmLim

A78 Cond. alarm dif-

ferential

Dierence band below the condenser alarm limit and condenser

block limit for clearing the alarms

A78 Cond Al Di

A54 Cond. block limit Setpoint for the condenser block alarm. Compressor will be

stopped when the alarm delay has expired. The alarm will clear

when the condenser temperature is decreased with 2 times the

set alarm dierential.

A54 CondBlockLim

A55 Cond. alarm delay Delay for the condenser block alarm and potential alarm action.

The delay starts when the condenser temperature exceeds the

condenser block limit

A55 CondAlarmDel

Fan control

Code Function Description Values Short name

u00 Control state Readout of the actual control state of the controller See earlier u00 Ctrl. state

u59 Fan Actual status of evaporator fan output 0=OFF, 1=ON u59 Fan relay

F05 Fan pulsing mode Pulse operation of fan 0=No pulsing,

1=Pulsing cut-out,

2=Pulsing cut-out night

F05 FanPulseMode

F06 Fan period time Period time for pulsing of fan F06 Fan cycle

F07 Fan ON cycle ON time for fan. The ON period is set as a percentage of the fan

period time

F07 Fan ON%

F04 Fan stop high S5

temp.

Fan stop temperature The function stops the fans in an error

situation, so that they will not provide power to the appliance. If

the defrost sensor registers a higher temperature than the one set

here, the fans will be stopped. There will be re-start at 2 K below

the setting. The function is not active during a defrost or start-up

after a defrost. With a value of 50 °C this function is disabled.

F04 FanStop temp

P65 Fan stop at blinds

closing

When a light output is congured, this output might also be used

to control night blinds. When light is turned OFF, the night blinds

are run down and the delay gives the option to stop the fans

while the night blinds are rolled down. If a delay is dened, the

fans are stopped in the dened time delay in order to ensure that

the blinds are closed correctly

P65 BlindFanStop

User Guide | Case/room controller (TXV), AK-CC25 Pro and AK-CC25 Pro BT

Railheat control

Light/Cleaning/Leak

Code Function Description Values Short name

u00 Control state Readout of the actual control state of the controller See earlier u00 Ctrl. state

x18 Dewpoint Actual dewpoint received from system manager via network --- Dew point

u61 Rail heat Actual status of rail heat output 0=OFF, 1=ON u61 Railh. relay

u85 Rail heat power Readout of the actual rail power in% u85 Rail DutyC%

o85 Rail heat control

mode

The rail heat can be controlled in several ways: 0: Rail heat is

running all the time 1: Pulse control is used with a timer function

following the day/night operation 2: Pulse control is used with a

dewpoint function. This function requires that a signal is received

about the dewpoint value. The value is measured by a system

manager and sent to the controller via the data communication.

0=ON,

1=Day/Night timer,

2=Dewpoint ctrl.

o85 Railh. mode

o41 Rail heat ON cycle

day

Rail heat power during day time. The ON period is set as a per-

centage of the period

o41 Railh.ONday%

o42 Rail heat ON cycle

night

Rail heat power during night time. The ON period is set as a per-

centage of the period time

o42 Railh.ONngt%

o43 Rail heat period time Period time for pulsing of rail heat o43 Railh.cycle

o88 Rail heat min. ON

cycle

Lowest permitted rail heat power. When the measured dewpoint

is below the dened minimum limit the rail heat will run with the

set minimum power

o88 Rail Min ON%

o86 Dewpoint min. limit If the measuered dewpoint is below the set value the rail heat is

running at minimum heat

o86 DewP Min lim

o87 Dewpoint max. limit If the measured dewpoint is above the set value the rail heat is

maximum

o87 DewP Max lim

Code Function Description Values Short name

u00 Control state Readout of the actual control state of the controller See earlier u00 Ctrl. state

u13 Night condition Status of the day/night operation (night operation: on/o) 0=OFF, 1=ON u13 Night Cond.

u63 Light Actual status of light output 0=OFF, 1=ON u63 Light relay

o38 Light control mode Conguration of light function

1: Light is controlled via day/night status

2: Light is controlled via data communication and master control

parameter "MC Light signal"

3: Light is controlled by door contact on DI input. When the door

is opened the relay will cut in. When the door is closed again there

will be a time delay of two min before the light is switched o.

4: As "2" but if there are any 15-min network errors, the light will

switch on and the night blind will open.

5: Light is controlled via DI input signal

1=Day and night, 2=Net-

work,

3=Door switch,

4=Network (Fallback),

5=Digital input

o38 Light cong

o98 Light at Main switch

OFF

Dene how light and blinds are to be controlled at Main switch

OFF 0: Light is switched o and night blinds are open when the

main switch is o 1: Light and night blinds are independent of

main switch.

0=OFF, 1=Normal ctrl. o98 Light MS=O

o46 Case cleaning mode The status of the function can be seen here or the function can be

started manually.0 = Normal operation (no cleaning) 1 = Only fans

are running to defrost the evaporator. All other outputs are O. 2

= Cleaning with stopped fans. All outputs are O. If the function is

controlled by a digital input signal, the relevant status can be seen

here in the menu.

0=OFF,

1=Fans run,

2=Cleaning

o46 Case clean

q59 Leak alarm action Select the alarm action at refrigerant leak detection 0=None,

1=Comp. OFF,

2=Comp OFF/All fans ON,

3=Shutdown

q59 Leak Action

User Guide | Case/room controller (TXV), AK-CC25 Pro and AK-CC25 Pro BT

Display control

Code Function Description Values Short name

u00 Control state Readout of the actual control state of the controller See earlier u00 Ctrl. state

u56 Display readout Readout of the temperature shown on the display u56 Display air

o97 Display readout Select which temperature to show in the display 1=Display air,

2=S6 Product temp.,

3=Ther. air

o97 Displ. Ctrl.

o17 Display air S4% Signal to the display sensor. Here you have to dene the ratio

between the sensors which the display has to use. S3, S4 or a

combination of the two. With setting 0% only S3 is used. With

100% only S4 is used

o17 Disp. S4%

r04 Display readout

adjustment

Correction of the display´s temperature.If the temperature at the

products and the temperature received by the controller are not

identical, an oset adjustment of the display temperature can be

carried out.

r04 Disp. Adj. K

q80 Display lter time To prevent too fast changes in the display readout, a lter time

can be set. The parameter sets the lter time constant τ (tau)

of the moving average lter for the display readout, when the

displayed temperature is moving away from the thermostat set

point. The lter time represents the time it takes for the display

readout to reach 66% of its nal value. At ve time the lter time,

the readout will have reached 99% of its nal value. When the

displayed temperature is approaching the thermostat set point,

no lter is applied.

q80 Disp. Filter

r05 Temperature unit Select whether temperatures are to be shown as °C or as °F. 0=Celsius, 1=Fahrenheit r05 Temp.unit

P89 Display keyboard

lock

With this setting it is possible to lock the keyboard operation of

the local display.

None: Display keyboard operation will never be lockedLocal:

When not used for some time, the local display will lock the

keyboard operations and a special key combination is required

in order to enable the keyboard operationsNetwork: When the

controller receives a master control signal (--- Key/BT lock) via

the network, the display keyboard operations will be locked. The

keyboard operations can only be activated again by setting the

master control signal OFF via the System Manager

0=None,

1=Local,

2=Network

P89 LockDispKey

q81 BLE Access level Here you can dene the required access level for initiation of

Bluetooth button

0=Always access,

1=Level 1,

2=Level 2,

3=Level 3,

4=No access

q81 BLE Access

q82 Function keys access

level

Here you can dene the required access level for initiation of

direct action buttons: light switch, defrost start and alarm reset

0=Always access,

1=Level 1,

2=Level 2,

3=Level 3,

4=No access

q82 FctKeyAccess

Alarm relay priority

Code Function Description Values Short name

u62 Alarm relay Actual status of alarm output 0=OFF, 1=ON u62 Alarm relay

P41 Alarm relay priority Set which alarm priorities that are to activate the alarm relay 0=Not used,

1=High Priority,

2=Medium priority,

3=All

P41 Al.Rel.Prio

q38 Mute alarm When muting alarms, the alarm relay will stop signaling the alarm

until a new alarm arises.When entering the alarm list in the AK-CC

Connect APP or the display, the alarm relay will be muted

0=OFF, 1=ON q38 Mute Alarm

q28 High temperature -

Priority

Select the priority of the alarms assigned to the alarm group. Be

aware - by selecting "Disable", the alarms will not be shown on the

display or be routed to the alarm relay or to the network.

0=Disabled,

3=Low,

2=Medium,

1=High

q28 Hi Temp Prio

q29 Low temperature -

Priority

Select the priority of the alarms assigned to the alarm group. Be

aware - by selecting "Disable", the alarms will not be shown on the

display or be routed to the alarm relay or to the network.

0=Disabled,

3=Low,

2=Medium,

1=High

q29 Lo Temp Prio

User Guide | Case/room controller (TXV), AK-CC25 Pro and AK-CC25 Pro BT

Code Function Description Values Short name

q30 Sensor errors - Prior-

ity

Select the priority of the alarms assigned to the alarm group. Be

aware - by selecting "Disable", the alarms will not be shown on the

display or be routed to the alarm relay or to the network.

0=Disabled,

3=Low,

2=Medium,

1=High

q30 Sensor Prio

q31 DI alarms - Priority Select the priority of the alarms assigned to the alarm group. Be

aware - by selecting "Disable", the alarms will not be shown on the

display or be routed to the alarm relay or to the network.

0=Disabled,

3=Low,

2=Medium,

1=High

q31 DIAlarm Prio

q32 Defrost - Priority Select the priority of the alarms assigned to the alarm group. Be

aware - by selecting "Disable", the alarms will not be shown on the

display or be routed to the alarm relay or to the network.

0=Disabled,

3=Low,

2=Medium,

1=High

q32 Defrost Prio

q33 Miscellaneous -

Priority

Select the priority of the alarms assigned to the alarm group. Be

aware - by selecting "Disable", the alarms will not be shown on the

display or be routed to the alarm relay or to the network.

0=Disabled,

3=Low,

2=Medium,

1=High

q33 Misc Prio

q35 Control stopped -

Priority

Select the priority of the alarms assigned to the alarm group. Be

aware - by selecting "Disable", the alarms will not be shown on the

display or be routed to the alarm relay or to the network.

0=Disabled,

3=Low,

2=Medium,

1=High

q35 CtrlOFF Prio

q36 Leak detection -

Priority

Select the priority of the alarms assigned to the alarm group. Be

aware - by selecting "Disable", the alarms will not be shown on the

display or be routed to the alarm relay or to the network.

0=Disabled,

3=Low,

2=Medium,

1=High

q36 Leak Prio

q53 Compressor - Priority Select the priority of the alarms assigned to the alarm group. Be

aware - by selecting "Disable", the alarms will not be shown on the

display or be routed to the alarm relay or to the network.

0=Disabled,

3=Low,

2=Medium,

1=High

q53 Comp. Prio

q54 Condenser - Priority Select the priority of the alarms assigned to the alarm group. Be

aware - by selecting "Disable", the alarms will not be shown on the

display or be routed to the alarm relay or to the network.

0=Disabled,

3=Low,

2=Medium,

1=High

q54 Cond. Prio

q82 Function keys access

level

Here you can dene the required access level for initiation of

direct action buttons: Light switch, Defrost start and alarm reset

0=Disabled,

3=Low,

2=Medium,

1=High

q82 FctKeyAccess

User Guide | Case/room controller (TXV), AK-CC25 Pro and AK-CC25 Pro BT

Miscellaneous  Access codes

Code Function Description Values Short name

o05 Access code 3 Access code for commissioning/OEM

-1: Has not been set yet

0: No access code required

1: Access code has been set to a value in the range 1 – 999

Note: The option of setting the value to 0 to give access to this

user level without using the access code is only available in AK-

CC25 Pro without Bluetooth.

When set, the access code value will only be shown for 1 minute

where-after the value is hidden and cannot be read out by any

interface. Remember to note down the set access code value.

o05 Acc. code 3

o64 Access code 2 Access code for service

-1: Has not been set yet

0: No access code required

1: Access code has been set to a value in the range 1 – 999

Note: The option of setting the value to 0 to give access to this

user level without using the access code is only available in AK-

CC25 Pro without Bluetooth.

When set, the access code value will only be shown for 1 minute

where-after the value is hidden and cannot be read out by any

interface. Remember to note down the set access code value.

o64 Acc. code 2

P88 Access code 1 Access code for daily operations

-1: Has not been set yet

0: No access code required

1: Access code has been set to a value in the range 1 – 999

Note: The option of setting the value to 0 to give access to this

user level without using the access code is only available in AK-

CC25 Pro without Bluetooth.

When set, the access code value will only be shown for 1 minute

where-after the value is hidden and cannot be read out by any

interface. Remember to note down the set access code value.

P88 Acc. code 1

Miscellaneous

Miscellaneous  Network

Miscellaneous  Time

Code Function Description Values Short name

U45 Network status Quality of the network communication U45 Comm. status

o03 Network address Network address of the controller

When used in a network system with a Danfoss system manager

AK-SM 800A, the address has to be set in the range 1 – 199. The

Modbus interface can be disabled by setting the Network address

to -1

o03 Unit addr.

oa1 Baudrate Communication speed of network 1=Auto,

2=9600 Baud,

3=19200 Baud,

4=38400 Baud,

5=115200 baud

oa1 Bus baudrate

oa2 Parity and stop bit Select parity and stop bit of Modbus messages 0=None, 1=Even, 2=Odd oa2 Parity bit

Code Function Description Values Short name

t07 Time hours Hour setting for clock t07 Clock Hour

t08 Time min Min setting for clock t08 Clock Min

t45 Time date Date setting for clock t45 Clock Date

t46 Time month Month setting for clock t46 Clock Month

t47 Time year Year setting for clock t47 Clock Year

User Guide | Case/room controller (TXV), AK-CC25 Pro and AK-CC25 Pro BT

Advanced

Advanced  Master Control

Code Function Description Values Short name

x62 Regulation condition Readout of the actual control state of the controller 0=Main switch OFF,

1=Injection start,

2=Superheat ctrl.,

3=Fill evap.,

4=Defrost,

5=Post defrost,

6=Forced closing,

7=Injection fault,

8=Emergency control,

9=Modulating ctrl.,

10=Melt period,

11=Door open,

12=Case cleaning,

13=Cutout,

14=Forced cooling,

15=Shut down

--- Reg. Cond.

x63 MC Actual cut-in

temp.

Readout of the actual cut-in value for the thermostat --- Cutin temp.

x64 MC Actual cut-out

temp.

Readout of the actual cut-out value for the thermostat --- Cutout temp.

x81 MC Ther. toggle Master control signal used for switching case load ON/OFF

depending on the load condition

0=No action, 1=Toggle ON,

2=Toggle OFF

--- TherToggle

x06 MC Night setback Master control signal for changing between day and night time

operation

0=OFF, 1=ON --- Night setbck

x17 MC Case shutdown Master control signal used to shut down a case for a time period.

During shutdown there will be no alarm monitoring

0=OFF, 1=ON --- Case shutdwn

x08 MC Forced cooling Master control signal that will provide forced cooling 0=OFF, 1=ON --- Forced cool.

x13 MC Defrost start Master control signal for starting a defrost. At adaptive defrost the

defrost might be skipped if the defrost is not needed

0=OFF, 1=ON --- MC def.start

x14 MC Defrost state Read out the actual state of the defrost 0=OFF, 1=ON --- DefrostState

x11 MC Hold after defrost Master control signal used for co-ordinated defrost control to

hold cabinets from returning to normal refrigeration after a

defrost until all cabinets have terminated defrost

0=OFF, 1=ON --- HoldAfterDef

x12 MC Stop defrost Master control signal used to prevent a defrost start in a control-

ler.

0=OFF, 1=ON --- Disable def.

o39 MC Light signal Master control signal for control of light via a data communication

signal from the system manager

0=OFF, 1=ON o39 Light remote

x03 MC Actual dewpoint Master control signal sending the actual measured dewpoint from

the system manager to the controller over the network.

--- Act.DewPoint

x83 MC Po load factor Master control signal calculating the actual load of the unit --- Load factor

aaa MC Key/Bluetooth

lock

Master control signal that will lock down all Bluetooth data com-

munication and optionally also the operation of the display keys

(depend upon selection in P89 Display keyboard lock)

0=OFF, 1=ON --- Key/BT Lock

x82 MC Load request Master control signal used to control the load balance between

multiple case controllers on the same suction line

--- LoadReq

Miscellaneous  Sensor adjustment

Code Function Description Values Short name

r10 S3 Air ON evap. -

Adjustment

Correction of sensor signal e.g. due to long sensor cable r10 Adjust S3

r09 S4 Air OFF evap. -

Adjustment

Correction of sensor signal e.g. due to long sensor cable r09 Adjust S4

r11 S5 Evaporator A -

Adjustment

Correction of sensor signal e.g. due to long sensor cable r11 Adjust S5

r59 S6 product temp. -

Adjustment

Correction of sensor signal e.g. due to long sensor cable r59 Adjust S6

User Guide | Case/room controller (TXV), AK-CC25 Pro and AK-CC25 Pro BT

Alarms and fault message

Code Function Description Short name

E01 Hardware failure The controller has a hardware failure --- Contr. error

E06 Clock lost time Clock has lost valid time --- RTC error

E25 S3 Air ON evap. A - sensor error Sensor signal is out of range. Please check the sensor for correct

operation

--- S3 error

E26 S4 Air OFF evap. A - sensor error Sensor signal is out of range. Please check the sensor for correct

operation

--- S4 error

E27 S5 Evaporator A - sensor error Sensor signal is out of range. Please check the sensor for correct

operation

--- S5 error

E28 S6 product temp. A - sensor error Sensor signal is out of range. Please check the sensor for correct

operation

--- S6 error

E37 S5 Evaporator B - sensor error Sensor signal is out of range. Please check the sensor for correct

operation

--- S5 error B

E64 Sc condenser sensor error Sensor signal is out of range. Please check the sensor for correct

operation

--- Sc error

A01 High temperature alarm A The alarm temperature has been above the max alarm limit for a longer

time period than the set alarm delay.

--- High t.alarm

A02 Low temperature alarm A The alarm temperature has been below the min alarm limit for a longer

time period than the set alarm delay.

--- Low t. alarm

A04 Door open alarm The door has been open for a too long time --- Door alarm

A05 Max defrost hold time exceeded The controller has been waiting longer time than permitted after a

coordinated defrost.

--- Max HoldTime

A15 DI alarm 1 Alarm signal from digital input signal --- DI1 alarm

A16 DI alarm 2 Alarm signal from digital input signal --- DI2 alarm

A19 Comp. safety Alarm from digital input monitoring the safety chain of compressor 1 --- Comp. fault

A45 Main switch set OFF The controller main switch has been set to either Stop or Manual control.

Alternatively, a digital input set up for “main switch" function, has

stopped control

--- Standby mode

A59 Case in cleaning mode A case cleaning operation has been started on a case --- Case clean

A61 Cond. high temperature The condenser temperature has reached the alarm limit. Check that the

air inlet of the condenser is clean, that the air ow is not blocked and that

the condenser fan is running

--- Cond Alarm

A80 Cond. block alarm The condenser temperature has reached the block limit and has stopped

the compressor. Check that the air inlet of the condenser is clean, that the

air ow is not blocked and that the condenser fan is running. If this alarm

arises again, better call a service company.

--- Cond Blocked

AA3 Refrigerant leak detected Refrigerant is leaking from the refrigeration system --- Refg.Leak

a04 Wrong IO conguration Inputs and outputs have not been congured correctly

(See appendix A for more information)

--- Wrong IO cfg

Z01 Max defrost time exceeded A The last defrost cycle has stopped on time instead of set temperature --- Max Def.Time

a12 Comp. safety 2 Alarm from digital input monitoring the safety chain of compressor 2 --- Comp.2 fault

a13 Compressor safety lockout

(1)

The compressors/condenser have violated safety limits more times than

allowed within the dened safety period and the clear ance of the alarm

will require a manual reset of the alarm, which can be done in one of the

following ways:

1. Navigate to alarm list on display and press the alarm button for 3 sec.

2. Power down the controller.

3. Set Main switch OFF and back ON again.

--- Comp LockOut

In an error situation, the alarm LED on the display will be on and the alarm relay will be activated (depending on priority).

By touching the alarm button, you can see the list of active alarms, please refer to the list of alarms below.

(1)

Alarm requires manual reset via one of the following options:

1. Power o controller

2. Long press on display alarm button while in alarm menu

3. Set the parameter “r12 Main switch” OFF and ON again

User Guide | Case/room controller (TXV), AK-CC25 Pro and AK-CC25 Pro BT

Alarm routing

Parameter Value Description

P41Alarm relay priority 0: None (no alarms are routed to relay)

1: High priority

2: High and medium priority

3: All alarms (except disabled alarms)

Select the alarm priorities that are sent to the alarm relay

If an alarm relay is dened, the priority of the alarms that are send to the alarm relay can be dened, please refer to the

table below:

The alarms are grouped, and the priorities of each alarm group can be set in accordance with the table below:

Alarm group priority Code Alarm

High temp. q28 High temperature - priority A01 High temperature alarm A

Low temp. q29 Low temperature - priority A02 Low temperature alarm A

Sensor error q30 Sensor errors - priority E25 S3 Air ON evap. A - sensor error

E26 S4 Air OFF evap. A - sensor error

E27 S5 Evaporator A - sensor error

E28 S6 Product temp. A - sensor error

E37 S5 Evaporator B - sensor error

E64 Sc condenser sensor error

DI alarms q31 DI alarms - priority A04 Door open alarm

A15 DI alarm 1

A16 DI alarm 2

AA3 Refrigerant leak detected

Defrost q32 Defrost - priority A05 Max defrost hold time exceeded

Max defrost time exceeded A

Miscellaneous q33 Miscellaneous - priority E01 Hardware failure

E06 Clock lost time

a04 Wrong IO conguration

Stop of control q35 Control stopped - priority A45 Main switch set OFF

A59 Case in cleaning mode

Condenser q54 Condenser - priority A61 Cond. high temperature

A80 Cond. block alarm

Compressor q53 Compressor - priority A19 Comp. safety 1

a12 Comp. safety 2

a13 Comp. safety lockout

User Guide | Case/room controller (TXV), AK-CC25 Pro and AK-CC25 Pro BT

Operating status

Value Comments

Not used

Wait for defrost master or slave

Wait for compressor ON time to elapse

Wait for compressor OFF time to elapse - restart time

Defrost sequence: Drip o delay state

Cooling stopped by MainSwitch = O.

Cooling stopped by thermostat

Cooling stopped by low S4 temperature

Defrost sequence: Defrosting state

Defrost sequence: Fan delay state

Door open (open DI-input)

Melt cut-out

Modulating temperature control (variable speed compressor)

Emergency cooling at sensor fault

Manual control of outputs

Case cleaning

Forced cooling

Delay of outputs at power up.

Heating active

Compressor safety (DI input function)

High condensing temp. Sc

Case shut down

Oil recovery

Temperature pulldown

Compressor lockout on safety

Compressor/Unit stopped due to leak alarm

Wrong IO Cong

Parameter Value Description

u00 Control state See list above

Readout of the actual control state

The control state shows what the controller is doing and this value can be readout as the rst parameter in the display

“Info” menu.

User Guide | Case/room controller (TXV), AK-CC25 Pro and AK-CC25 Pro BT

Parameter Setting S3 S4 S5A S5B S6 Sc

r15 Ther. S4% = 0% x

= 100% x

0% < setting <100% x x

r61 Ther.S4% Ngt = 0% x

= 100% x

0% < setting <100% x x

A36 Alarm S4% = 0% x

= 100% x

0% < setting <100% x x

r98 S4 Min Lim > -60 °C x

o97 Displ. Ctrl. = 1: Display air

o17 Disp. S4% = 0% x

= 100% x

0% < setting <100% x x

d10 DefStopSens. = 1: S5A x

= 2: S4 x

= 3: S5A + S5B x x

d19 CutoutS5Dif. < 20 °C x

F04 FanStop temp < 50 °C x

q39 Food sensor = 4: S6 Product temp. x

o97 Displ. Ctrl. = 2: S6 Product temp. x

DO1 – DO4 Cong = 12: Condenser fan

Appendix A

Handling of illegal IO conguration

At the following illegal IO combinations, the controller will raise a “Wrong IO cong” alarm and control will not be able to

start:

1. If no air temperature sensors have been congured (Either S3 or S4 must be congured)

2. If the same analogue input function is selected for several analogue hardware inputs

3. If no compressor has been congured

4. If compressor 2 has been congured without having congured a compressor 1

5. If two compressors have been congured, and the analogue output has been congured for compressor speed

6. If defrost B output has been congured without having congured a defrost A output

7. If evap. sensor S5B has been congured without having congured an evap. sensor S5A

8. If a condenser fan relay has been congured without having congured a condenser sensor Sc

If the controller application requests a specic sensor to be present and the sensor has not been congured, an “Wrong IO

cong” alarm and a sensor error alarm for the missing sensor will be raised:

1. If the application setup request S3 and S4 sensors, but only one of them has been congured

2. If the application setup requests a specic defrost sensor that has not been congured

3. If the application setup requests a S4 sensor for frost protection and it has not been congured

4. If the application setup requests a S5 sensor for fan delay and the sensor has not been congured

5. If the application setup requests a S3 or S6 sensor for food temp./display readout and the sensor has not been

congured.

Appendix B

Sensor alarms

The controller will only raise a sensor alarm if the parameter setup requires a specic sensor and this sensor is not

congured or is defective.

The table below shows when a specic sensor is requested:

Appendix

User Guide | Case/room controller (TXV), AK-CC25 Pro and AK-CC25 Pro BT

Ordering

Type Packaging format Quantity Code no.

AK-CC25 Pro Single pack 1 084B4022

AK-CC25 Pro Industrial pack 27 084B4122

AK-CC25 Pro BT Single pack 1 084B4023

AK-CC25 Pro BT Industrial pack 27 084B4123

Connectors kit for AK-CC25 Pro Industrial pack 81 084B4714

Interface cable AK-CC25 - KoolKey 2.1 Single pack 1 080N0334

KoolKey 2.1 (PV04) Single pack 1 080N0020

User Guide | Case/room controller (TXV), AK-CC25 Pro and AK-CC25 Pro BT

The list contains all certicates, declarations, and approvals for this product type. Individual code number may have some

or all of these approvals, and certain local approvals may not appear on the list.

Some approvals may change over time. You can check the most current status at danfoss.com or contact your local Danfoss

representative if you have any questions.

Statements for the AK-CC25 Pro BT

FCC COMPLIANCE STATEMENT

CAUTION: Changes or modications not expressly approved could void your authority to use this equipment.

This device complies with Part 15 of the FCC Rules. Operation to the following two conditions: (1) This device may not

cause harmful interference, and (2) this device must accept any interference received, including interference that may

cause undesired operation.

INDUSTRY CANADA STATEMENT

This device complies with Industry Canada license-exempt RSS standard(s). Operation is subject to the following two

conditions: (1) this device may not cause interference, and (2) this device must accept any interference, including

interference that may cause undesired operation of the device.

Le présent appareil est conforme aux CNR d’lndustrie Canada applicables aux appareils radio exempts de licence.

L’exploitation est autorisée aux deux conditions suivantes : (1) l’appareil ne doit pas produire de brouillage, et (2)

l’utilisateur de l’appareil doit accepter tout brouillage radioélectrique subi, même si le brouillage est susceptible d’en

compromettre le fonctionnement.

NOTICE

RED Compliance Notice

AK-CC25 Pro BT complies with EU Directive 2014/53/EU and updated 2025 cybersecurity requirements.

FCC Compliant Notice

This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of

the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential

installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used

in accordance with the instructions, may cause harmful interference to radio communications. However, there is no

guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to

radio or television reception, which can be determined by turning the equipment o and on, the user is encouraged to try

to correct the interference by one or more of the following measures:

• Reorient or relocate the receiving antenna.

• Increase the separation between the equipment and receiver.

• Connect the equipment into an outlet on a circuit dierent from that to which the receiver is connected.

• Consult the dealer or an experienced radio/TV technician for help.

Modications: Any modications made to this device that are not approved by Danfoss may void the authority granted to

the user by the FCC to operate this equipment.

Danfoss Cooling

11655 Crossroads Circle

Baltimore, Maryland 21220

United States of America

www.danfoss.com

Certicates, declarations, and approvals

Controller Certication Mark Country

AK-CC25 Pro BT EMC/LVD/RoHS CE EU

AK-CC25 Pro BT UL recognized cURus NAM (US and Canada)

AK-CC25 Pro BT RED CE EU

AK-CC25 Pro BT FCC FCC ID USA

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Danfoss AK-CC25 Fixed Industrial Refrigeration Controller with Bluetooth Low Energy

Product's Documents

User Manual

Specifications

Danfoss AK-CC25 Questions and Answers

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