Installation Manual for Outdoor Unit
MVHP036MV2AA
MVHP048MV2AA
MVHP056MV2AA
No. 0150518852 D
• Please read this manual carefully before using
• Keep this operation manual for future reference
Contents
Product Features ...............................................................................................................................................................1
Safety precautions ............................................................................................................................................................. 1
Transportation and Lifting ..................................................................................................................................................3
Outdoor unit installation ..................................................................................................................................................... 4
Electric wiring and the application ...................................................................................................................................13
Installation and debugging...............................................................................................................................................17
Failure code ..................................................................................................................................................................... 20
Trial operation and the performance ...............................................................................................................................24
User Manual
Operation condition:
To use the air conditioner normally, please perform as to the below conditions.
Operating Range of Air Conditioner
Cooling
dry
Indoor
Max. DB: 90°F(32°C) WB: 74°F(23°C)
Min. DB: 64°F(18°C) WB: 57°F(14°C)
Outdoor
Max. DB: 115°F(48°C) WB: 79°F(26°C)
Min. DB: 23°F(-15°C)
Heating
Indoor
Max. DB: 80°F(27°C)
Min. DB: 59°F(15°C)
Outdoor
Max. DB: 75°F(24°C) WB: 59°F(15°C)
Min. DB: -4°F(-20°C)
Warning
•
I
f the supply cord is damaged, it must be replaced by
the manufacturer, its service agent or similarly qualied
persons in order to avoid a hazard.
•
T
his appliance is not intended for use by persons
(including children) with reduced physical, sensory
or mental capabilities, or lack of experience and
knowledge, unless they have been given supervision or
instruction concerning use of the appliance by a person
responsible for their safety.
•
C
hildren should be supervised to ensure that they do
not play with the appliance.
•
T
his appliance can be used by children aged from 8
years and above and persons with reduced physical,
sensory or mental capabilities or lack of experience
and knowledge if they have been given supervision or
instruction concerning use of the appliance in a safe
way and understand the hazards involved. Children
shall not play with the appliance. Cleaning and user
maintenance shall not be made by children without
supervision.
•
T
he appliances are not intended to be operated by
means of an external timer or separate remote-control
system.
•
K
eep the appliance and its cord out of reach of children
less than 8 years.
Important matters
• The company does not assume any responsibility for the
accidental damage caused by the operation of the air
conditioner in a particular environment.
• The air conditioner can only be used as an ordinary air
conditioner.
• Do not use this heat pump air conditioner for dry clothing,
frozen food, cooling or heating, etc.
• No part of this manual may be copied without permission.
• Bold text (warning, prohibition, attention) used to indicate
the degree of risk. The following is a descriptionof the
text and symbols in the explanatory notes:
• If you have any questions, please contact the dealer or
the service center designated by our company.
• Please install air conditioning in accordance with local
standards.
WARNING:
Indicates a potentially hazardous situation
which, if not avoided, will result in death or
serious injury.
PROHIBIT:
Do not carry out the operation.
CAUTION:
Sometimes it can cause serious accidents.
1
WARNING
• This manual should be saved and stored close to this air conditioning equipment.
• There are two types of indications, " WARNING" and " CAUTION" The indication preventing from death or heavy
injury is lister as " WARNING".Even the indication listed as " CAUTION" may also cause serious accident. Both of
them are related to safety, and should be strictly follwed.
• After installation and start-up, please give the manual to the user. The manual should be kept in safe place and close to
the unit.
• Installation or maintenance should be performed by an authorized agency. Wrong operation of this air conditioning
equipment may cause water leakage, electric shock or re.
• Please install the unit on the top of a solid foundation or structure which is strong enough to support the unit.
• The installation of this air conditioning equipment should follow local construction codes.
• Use the right cable size, secure the terminal rmly, organize the cables neatly and make sure no tension is added on
cables. Cable insulation should not be damaged. The incorrect installation may lead to overheating or re.
• When installing or moving the unit, the refrigerant system should be vacuumed and recharged with R-410A refrigerant.
If any other gas enters the system, it may lead to abnormal high pressure which may cause damage or injury.
• Please use the proper manifolds or branches during the system installation. The wrong parts may cause refrigerant
leakage.
• Keep the drain pipe away from toxic gas vents to prevent possible pollution of indoor environment.
• During or after the installation, please check whether there is a refrigerant leakage. If any leakage, please take any
measures for ventilation. The refrigerant may be toxic at some concentration levels.
• The unit is not explosion-proof. Please keep it away from ammable gases.
• The drain pipe should be installed per this manual to ensure proper drainage. The pipe should be well insulated to avoid
condensation. Incorrect installation may lead to water leakage.
• Both liquid pipe and the gas pipe should be well insulated. Not enough insulation may lead to system performance
deterioration or humidity formation.
• This air conditioning equipment is not intended to be operated by persons with lack of experience and training, unless
they have supervision or instruction concerning use of this air condition equipment.
• Please keep children away from this air conditioning equipment.
• If the supply cord is damaged, it must be replaced by the manufacturer, its service agent orsimilarly qualied persons in
order to avoid a hazard.
• This appliance is not intended for use by persons (including children) with reduced physical, sensory or mental
capabilities, or lack of experience and knowledge, unless they have been given supervision or instruction concerning
use of the appliance by a person responsible for their safety.
• Children should be supervised to ensure that they do not play with the appliance.
Product Features
Safety precautions
• The outdoor uint adopts "simultaneous control" type, all indoors should be heating or cooling simultaneously.
• To protect compressor,before startup,the unit should be electried for 12 hours.If the unit is not used for a long time,
please cut off the power to save energy, or the unit will consume the power.
This manual describes the installation and installation of outdoor units. For the installation of the indoor machine, please
refer to the instruction manual of the indoor unit.
Please read the installation instructions carefully before installation, according to the instructions of the installation
construction.
PROHIBIT
• This system uses R410A refrigerant, do not use oxygen, acetylene or any other ammable/toxic gases near the unit.
These gases are dangerous and may cause explosion. It is recommended to use compressed air, nitrogen or refrigerant
for such tests.
• Keep water away from the indoor and outdoor units. These products are equipped with electrical components, which
may cause serious electric shock if exposed to water.
• Do not modify the safety devices in the indoor or outdoor unit. Modifying these devices can cause serious accidents.
2
CAUTION
R410A specially tool Remarks
1 gauge manifold range: HP˃652.5PSI(4.5MPa), LP˃290PSI(2MPa)
2 charge hose pressure: HP:768.5PSI(5.3MPa), LP:507.5PSI(3.5MPa)
3 electronic balance for charging R410A can not use the measurable charging tank
4 torque spanner
5 are tool
6 copper pipe gauge for adjusting projecting margin
7 vacuum pump adapter must be with reverse stop valve
8 leakage detector can not use freon leakage detector, but the He detector
• Grounding wire should be connected with the grounding bar. The grounding wire can not be connected to the gas pipe,
water pipe, lightening rod or the telephone grounding wire. Improper grounding may cause electric shock.
• Don't install the unit in a location with ammable gas or it may cause re.
• Install the water drainage pipe according to the manual, improper installation will cause water leakage and damage.
• The outdoor fan should not blow towards gardens/vegetation or the air will dry out the plants.
• Please ensure proper clearances, if not, service technicians will not have room to service.
• When installing the unit on a roof or other high places, to prevent injury to the service technician, please set a xed
ladder and railing at the installation site.
• Use a wrench and fasten the nut. Use a torque wrench to tighten at at proper torque spec. Don't over tighten the nut or
you risk damaging the are. Will cause refrigerant leaks.
• Be sure to insulate the refrigerant pipe, or there will be water leakage or water dripping causing damage.
• After installing the refrigerant pipe, test for leaks by charging with nitrogen.
• Don't use the other refrigerants except for R410A. The R410A pressure is 1.6 times higher than R22 pressure. R410A
tanks are marked with pink.
• We changed the stop valve diameter of the R410A unit to enhance the compression consistency. We also changed the
ared pipe dimension. Adjust the R410A specially tools according to the below table.
• The maintenance cover plate of the indoor or outdoor unit should not be removed when the main circuit power supply
on. Shut off power before removing.
• Refrigerant leakage can cause breathing problems. In the event of a refrigerant leak, close the main valve, extinguish
any ame and contact a local servicer immediately.
• Use the proper breaker and surge protector. If not used, an electric shock or re may cause injury or damage.
• The installation and service technician shall ensure that refrigerant leaks comply with local laws and regulations.
Safety precautions
• When charging refrigerant, the refrigerant must be taken out in liquid state from the tank.
• When installing the power cord and the connecting line must be a least 1m from the TV or radio, so as to avoid image
interference or noise.
• In the room with uorescent lamp (reverse or fast start type), remote control signal transmission distance may not reach
the predetermined value, so the indoor unit installed away from the uorescent lamp as far as possible.
• Please use the fuse to meet the capacity requirements.
• To prevent the destruction of wires, electrical components, etc. by rats or other animals.
• Recommended room ventilation every 3 to 4 hours.
Arrival inspection
• After receiving the unit, should check whether there is transport damage. If any damage is found on the surface or=
inside, it shall be reported immediately to the shipping company in writing.
3
Transportation and Lifting
Lifting
Manual handling
Please do not remove the packaging until the unit is close to
the installation location.
CAUTION
•
Do not place anything on the device
•
Use two ropes for lifting the outdoor unit
CAUTION
•
To ensure safety, slowly lift while keeping the unit level.
•
Do not use a forklift to move the unit without the unit
packaging.
•
Padding should be used to protect the unit while lifting it.
CAUTION
•
In the installation and commissioning, the outdoor machine do not put any irrelevant material, to ensure that there is
no debris inside the machine, or there may be a fire or accident.
rope
Over 60 degrees
2.3~3.3 ft
Do not remove
packing tape and
packing box.
As shown in the
rope through
the wood base
around the lifting
hole.
Hoisting method
Hoist the unit slowly and ensure that it is level.
①
Removal of the outer packing is strictly prohibited
②
Hoist outdoor unit packaging as shown using two ropes.
Follow these points when moving the unit by hand:
①
Do not destroy the wood base.
②
In order to prevent the outdoor unit from tipping note the units center of gravity as shown in the gure.
③
Use two or more people to carry and move the outdoor unit.
Center of
gravity
Wood base
Handles
Unit maximum tilt angle 20
degrees.
4
In installation, please check specially the below items:
• If the connected units quantity and the total capacity is in the allowable range?
• If the refrigerant pipe length is in the limited range?
• If the pipe size is proper? And if the pipe is installed horizontally?
• If the branch pipe is installed horinzontally or vertically?
• If the additional refrigerant is counted correctly and weighed by the standard balance?
• If there is refrigerant leakage?
• If all the indoor power supplies can be on/off simultaneously?
• If the power voltage is in compliance with the data marked on the rating label?
• If the address of indoors has been set?
(1) Before installation
1) Before installation, check if the model, power supply, pipe, wires and parts purchased respectively are correct.
2) Check if the indoors and outdoors can be combined as the following.
Notice:
Total capacities of indoor units being used ≤ 100% of
rated capacities of outdoor unit.
Notice:
The branch pipe should be installed horizontally, the
maximum error angle should not exceed 10 degrees.
Outdoor Indoor
Capacity
(1000Btu/h)
Combination
type
Indoor
qty
Total indoor capacity
(1000Btu/h)
36 Single 6 18-46
48 Single 8 24-62
56 Single 9 27-72
Indoor capacity
(1000Btu/h)
07
09
12
18
24
32
36
42
48
total indoor
capacity
(1000Btu/h)
branch pipe (optional)
less than 114 FQG-B335A
Outdoor unit installation
(2) Installation place selection
Air-conditioner can't be installed
in the place with inammable
gas. Or it will cause re hazard.
The unit should be installed at the
place with good ventilation. No
obstacle at the air inlet/outlet. And no
strong wind blows the unit.
The installation space refers to the
latter info.
The unit should be installed at the strong
enough place. Or it will cause vibration and
noise.
• The unit should not be installed at the
below places or it will cause damage.
• A place where there is corrosive gas
(spa area etc). A place blowing salty air
(seaside etc).
• A place with strong coal smoke.
• A place with high humidity.
• A place where there is device emitting
electrical interference.
• A place where voltage uctuations
• occur.
• A place where the water can drain
easily.
• A place where no other heat
sources will affect the unit.
• Consider snow depth when
installing outdoor unit.
• Install the anti-vibration rubber
between the unit and the bracket.
The unit should be installed in a
place where the cold/hot air or
noise will not interfere with the
neighbors.
5
Note:
1. In snowy areas, install the unit on a bracket or under a snow-proof cover to prevent the accumulation of
snow.
2. Do not install the unit at a place where ammable gas exists.
3. Install the unit in a sturdy location.
4. Install the unit in a level location.
5. When being installed in a location with strong winds, set the air outlet of the unit perpendicular to the
wind direction. Also secure the unit with the bolts.
6. When opening the electric box cover for maintenance, please secure the cover with screws.
(3) Installation and maintenance space
Selection of installation location of outdoor
(1) Single-unit installation (unit: in.(mm))
The top and two side surfaces must be exposed to open space, and barriers on at least one side of the front and back
shall be lower than the outdoor unit.
Installation instruction
(2) Multi-unit installation (unit: in.(mm))
6
(3) Multi-unit installation in front and back (unit: in.(mm))
The top and two side surfaces must be exposed to open
space, and barriers on at least one side of the front and back
shall be lower than the outdoor unit.
• The installation service spaces shown in the illustrations are based on an air intake temperature of 95°F(35°C)(DB)
for COOL operation. In regions where the air intake temperature regularly exceeds 95°F(35°C)(DB), or if the heat load
of outdoor units is expected to regularly exceed the maximum operating capacity, reserve a larger space than that
indicated at the air intake side of units.
• Regarding the required air outlet space, position the units with consideration to the space required for the onsite
refrigerant piping work as well. Consult your dealer if the work conditions do not match those in the drawings.
NOTICE
If drain holes of the outdoor unit are covered by a mounting base or by oor surface, raise
the unit in order to provide a free space of more than 5in.(130mm) under the outdoor unit.
Foundation work
• Check the strength and level of the installation ground so that the unit will not cause any
operating vibration or noise after installation.
• In accordance with the foundation drawing in the gure, x the unit securely by means of
the foundation bolts.
• It is best to screw in the foundation bolts until their length are 0.8in.(20mm) from the
foundation surface.
˃5in.(130mm)
• Fix the outdoor unit to the foundation bolts using nuts with resin washers(1) as shown in the gure.
(4) Precautions on installation
Installation instruction
• Avoid strong wind blowing directly to the outdoor fan and heat exchanger.If there is no need to install the outdoor
machine in the open space of the building or the enclosure, the following two ways can be used to avoid the fan reversal
or damage caused by strong wind blowing.
(1) Using the windshield
Wind
deector
Fierce wind
(2) Near wall installation
More than 80inch (2000mm)
Fierce wind
Fierce wind
Sketch of machine installation
and strong wind direction
flow out
0.8in. (20mm)
screw nut
foundation bolt M12
fill in mortar
concrete
1
Above 120(3000)
7
• To ensure correct efciency, the pipe should be as short as possible.
• Coat refrigerant oil on the connector and the are nut.
• When bending the pipe, the bend diameter should be as large as
possible to prevent the pipe from breaking or kinking.
• When connecting the pipe, center it and thread the nut by hand.
• Then tighten it with the double spanners.
• Don't let any debris such as sand, water etc into the pipe.
Pipe connection method:
When fastening and loosing the nut,
operate with double spanners, because
only one spanner cannot execute rmly.
If threading the nut as not aiming at
the center, the screw thread will be
damaged, further it will cause leakage.
Spanner
Connector
Nut
Spanner
Cautions in piping installation:
• When welding the connector use hard solder, charge nitrogen into the pipe to prevent oxidation. If not the oxygen lm in
the pipe will clog the capillary and the expansion valve. May even cause a deadly accident.
• The refrigerant pipe should be clean. If water or any other impurities enter the pipe, charge with nitrogen to clean the
pipe. The nitrogen should ow around the pressure of 72.5PSI(0.5Mpa). When charging the nitrogen, stop up the end of
the pipe by hand to enhance the pressure in the pipe, then move your hand to stop up the other end of the pipe.
• The piping installation should be done while the stop valves are closed.
• Before welding the valve and the pipes, use a wet cloth to cool down the valve and the pipes.
• When the connection pipe and branch pipe need to be shortened, please use special shears. Do not use a saw.
(5) Refrigerant pipe connection
Pipe material and specs selection
1. Please select the refrigerant pipe of the below material.
Material: the phosphoric oxidize seamless copper pipe, model: C1220T-
1/2H (diameter is over 19.05); C1220T-0 (diameter is below 15.88).
2. Thickness and specs:
Conrm the pipe thickness and specs according to the pipe selection
method(the unit is with R410A, if the pipe over 19.05 is 0-type, the
pressure preservation will be bad, thus it must be 1/2H type and over
the min. thickness.
3. The branch pipe must be from Haier.
4. When installing the stop valve, refer to the relative operation instruction.
5. The pipe installation should be in the allowable range.
6. The installation of branch pipe and gather pipe should be performed
according to the relative manual.
Drain pipe disposal
• Make sure the drain works properly.
• In regions where buildups of snow can
be expected, the accumulation and
freezing of snow in the space between
the heat exchanger and external plate
may lower operating efciency.
• After punching the knock-out hole, the
application of repair-type paint on the
surface around the edge sections is
recommended to prevent rust.
Installation instruction
If the coating on the fastening area is stripped off, the nuts rust easily.
Dimensions (bottom view) (unit of measurement: mm)
A leg pitch1
B leg pitch2
C Front grill (air outlet side)
D Drain hole
E Bottom frame
F Knock-out hole (for piping line)
8
Installation instruction
3. Pipe "c" diameter ( outdoor pipe diameter)
Note:
• When the distance from outdoor to the longest indoor is
over 98ft, the main pipe should be the enlarged diameter.
• If pipe b diameter is larger than main pipe c,enlarge main
pipe c diameter to be the same as pipe b.
Outdoor capacity
(x1000Btu/h)
Gas pipe (in) Liquid pipe (in)
36 Ø5/8 Ø3/8
48 Ø5/8 Ø3/8
56 Ø5/8 Ø3/8
Copper pipe selection:
Note: If the copper pipe with outer diameter 19.05 is coil
pipe, the thickness should be over 1.1.
hardness softness
Outer diameter (in) Ø1/4 Ø3/8 Ø1/2 Ø5/8
Min. thickness (in) 0.031 0.031 0.039 0.039
hardness Half-hardness
Outer diameter (in) Ø3/4 Ø7/8 Ø1 Ø1 1/8
Min. thickness (in) 0.039 0.043 0.047 0.055
Pipe specication:
a
a
a
a
b
b
c
1. Pipe "a" diameter (between indoor and branch pipe) (depends on indoor pipe)
Please refer to the indoor air conditioner manual.
2. Pipe "b" diameter (between branch pipes)
Total indoor capacity after the branch pipe (x1000Btu/h) Gas pipe (in) Liquid pipe (in)
X<38 Ø5/8 Ø3/8
38≤X< 80 Ø3/4 Ø3/8
Piping connection method:
Pipes can be connected in four directions
A, B, C, D:Copper pipe hole
E:Power cord hole (with its own cable sheath)
F:Communication line hole
A
B
C
D
E
F
Enlarged diagram
As shown in the gure, the piping can be connected from four directions. Through the front / rear hole piping piping on
the cover hole or crack directly across the oor.
From the outdoor machine unloading piping cover with a screwdriver and hammer knock off holes along the guide wire
break. Then, trim the edges of the holes, and mounted on the insulating sleeve (site) to protect the piping and wiring.
charging valve
liquid pipe
gas pipe
9
Installation instruction
Long pipe and high drop
1. Allowable pipe length and height difference
Permissible value Piping part
Piping
length
Total length of piping (actual length) 492ft.(150m) L1+L2+L3+L4+a+b+c+d+e
Longest piping L Actual length 230ft.(70m) L1+L2+L3+L4+e
Piping length of indoor unit which is furthest to the rst branch
piping L (*)
131ft.(40m) L2+L3+L4+e
Drop
height
Drop height between indoor and outdoor unit
H
Up outdoor 98ft.(30m) ——
Under outdoor 66ft.(20m) ——
Drop height between indoor units h 49ft.(15m) ——
Maximal length and drop height permissible of refrigerant piping
Drop height between indoor and outdoor units
Drop height between
indoor units
h≤49ft.(15m)
Length of the longest piping after the
rst branch piping L
First branch piping
Outdoor unit
Indoor unit
Length of the longest piping L
A. Outdoor unit
Unit pipe spec and connection method (unit: in.(mm))
Model
Gas pipe side Liquid pipe side
Diameter Connecting method Diameter Connecting method
MVHP036MV2AA Ø5/8"15.88
Flared joint
Ø3/8"9.52
Flared jointMVHP048MV2AA Ø5/8"15.88 Ø3/8"9.52
MVHP056MV2AA Ø5/8"15.88 Ø3/8"9.52
B. Indoor unit
Please refer to the indoor air conditioner manul.
Connecting method: Flared joint
C. Pipe spec and the torque
Diameter Thickness Torque
Ø1/4(6.35) 3/95"(0.8) 126~152Ib.in(14.2~17.2N.m)
Ø3/8"(9.52) 3/95"(0.8) 289~353Ib.in(32.7~39.9N.m)
Ø1/2"(12.7) 1/25"(1.0) 438~534Ib.in(49.5~60.3N.m)
Ø5/8"(15.88) 1/25"(1.0) 547~667Ib.in(61.8~75.4N.m)
Branch pipe
Outdoor unit type
Branch pipe selection:
total indoor capacity(1000Btu) Model (optional)
less than 114.3 FQG-B335A
10
Installation instruction
Note:
1. When connecting the pipe to the outdoor unit, please pay attention to the outdoor pipe dimension.
2. When changing the diameter between pipes and between the units, please change on the branch pipe side.
3. Be sure to blow nitrogen when welding. If not, oxides will be produced and cause heavy damage. Take precautions to
prevent water and dust from getting into the pipe.
Adhesive side
Prepare on eld
Seal the connection and wrap the
heat insulator with adhesive tape
Cut off pipe with the cutter
Cut off at the middle
• Gas pipe and liquid pipe should be insulated separately.
• The insulation material for gas pipe should be rated for temperatures over
248°F (120°C). The liquid pipe should be for over 158°F (70°C).
• The insulation should be over 0.39in.(10mm) thick, when the ambient
temp. is 86°F (30°C)When the relative humidity is over Liquid pipe 80%,
the insulation thickness should be over 0.59in. (15mm).
• The material should be snug against the pipe without a gap,
then be wrapped with adhesive tape. The connection wire can
not be wrapped with the insulation material and should be at
least 7.87in.(20cm) from the insulation.
Insulation:
• During operation, the pipe will vibrate, expand or shrink. If not being secured, the refrigerant will focus on one part and
cause the pipe to break.
• To prevent stressing the pipe, secure the pipe every 6.56-9.84ft.(2-3m).
Secure refrigerant piping
Connection wire
over 7.87in.(20cm)
Adhesive tape
Gas pipe
Heat insulator
Liquid pipe
Pipe installation
When doing the piping connection, please do the following:
• Be careful not to damage any parts or pipes while connecting to the unit.
• Close the valves fully when connecting the pipes
• Protect the pipe from getting water or other impurities in them (welding after being laid down, or being sealed with
adhesive tape).
• Use large diameter bends when possible(over 4 times of the pipe diameter).
• The connection between outdoor liquid pipe and the distributing pipe is ared type. Please are the pipe with a tool used
with R410A after installing the are nut. If the pipe length has been adjusted with the copper pipe gauge, you can use
the original tool to are the pipe.
• The oil is ester oil, not the mineral oil, since the unit uses R410A.
• When connecting the pipe, fasten the pipes using a spanner. The torque refers to the former info.
• The outdoor gas pipe and the refrigerant distributing pipe, as well the refrigerant distributing pipe and the branch pipe
should be welded with hard solder.
Pipe outer
diameter
A
Ø1/4(6.35) 0.36(9.1)
Ø3/8"(9.52) 0.52(13.2)
Ø1/2"(12.7) 0.65(16.6)
Ø5/8"(15.88) 0.78(19.7)
Expanding pipe: A(in.(mm))
Pipe outer diameter
When it is hard pipe
Special tool
for R410A
The former
tool
Ø1/4(6.35)
0-1/51"
(0-0.5)
1/25"-1/17"
(1.0-1.5)
Ø3/8"(9.52)
Ø1/2"(12.7)
Ø5/8"(15.88)
Projecting length of pipe to be expanded: B(mm)
11
Installation instruction
• Protect the pipe ends from getting water and other impurities into
the pipes (from welding, led or being sealed with adhesive tape).
• The refrigerant pipe should be clean. The nitrogen should ow at
pressure around 29PSI(0.2Mpa) and when charging the nitrogen,
stop up the end of the pipe by hand to increase the pressure in the
pipe, then move your hand and stop up the other end.
• Close the valves fully when connecting the pipes.
• When welding the valve and pipes, use a wet cloth to cool down the valve and
pipes.
Seal the pipe end with
adhesive tape or the stopper
to increase the resistance, ll
up the pipe with nitrogen.
Only nitrogen gas
can be used
Brazing
<N2>
Taping
Adhesive tape
Flat
Brazing
1st side
Hand
2nd side
Source valve
29PSI
(0.2MPa)
• Weld the pipe while charging with nitrogen or it will cause impurities (including
a lm of oxidation) to clog the capillary and the expansion valve which may lead
to deadly accidents.
1. The outdoor unit has been tested for leakages from the factory. After connecting the distributing pipe, test for leakages
from the outdoor check valve and the indoor pipe. While testing, the valves should be close.
2. Refer to the below gure to charge nitrogen into the unit to test. Never use chlorine, oxygen, ammable gas for the
leakage test. Apply pressure on both the gas pipe and the liquid pipe.
3. Apply the pressure step by step to the target pressure.
a. Pressurize to 72.5PSI(0.5MPa) for more than 5 minutes, check if pressure goes down.
b. Pressurize to 217.5PSI(1.5MPa) for more than 5 minutes, check if pressure goes down.
c. Pressurize to the target pressure 580PSI(4.0MPa), record the temp. and the pressure.
d. Leave it at 4.0MPa for 1 day or more, if the pressure does not go down, the test is complete.
Note that when the temp. changes
by 1degree, pressure will change
1.45PSI(0.01MPa). Correct
the pressure as needed.
e. After performing a~d, if the pressure
goes down, there is leakage. Check
any brazed and ared connections
using soapy water. Fix the leakage and
perform test again.
4. After the leakage test evacuate the
system.
Nitrogen
Hi handle
Gauge manifold
Hi
To indoor
Check valve
Gas pipe
Gas pipe
Check hole
Outdoor
Lo
Lo handle
(6) Leakage test
Leakage test passed
leave it for over 1
hour, vacuum
gauge does not arise.
after reaching -14.645PSI
(101KPa) or less (below
-755mmHg), let the vacuum
pump run continuously for 1
hour or more.
Charge refrigerant
Evacuation begins
Check vacuum
Evacuation ends
if vacuum needle rises, it shows there is water or leakage in the
system, please correct the problem and then evacuate again.
Evacute at the liquid service valve and both sides of the gas service valve.
Operation procedure:
(7) Evacuation
12
Installation instruction
Add additional refrigerant under the liquid state with the gauge.
If the additional refrigerant can not all be added, when the outdoor stops, charge it using trial mode.
If the unit runs for a long period undercharged, the compressor will eventually fail.(charging must
be nished within 30 minutes especially when the unit is running while charging).
A. Charge amounts from the factory exclude the refrigerant in the pipes.
B. The unit is charged with a standard amount of refrigerant (distributing pipe length is 0).
Additional charge amount=actual length of liquid pipe x additional amount per meter liquid pipe
Additional charge amount=L1×0.113+L2×0.073+L3×0.037+L4×0.015
L1: total length of 5/8"(15.88) liquid pipe L2: total length of 1/2"(12.7) liquid pipe
L3: total length of 3/8"(9.52) liquid pipe L4:total length of 1/4"(6.35) liquid pipe
C. Refrigerant charging and additional charge
Note:
• To prevent adding different oils into the pipe, please only use a gauge manifold and charging hose for R410A.
• Tank color for R410A is pink.
• Do not use a charging cylinder because R410A will change when transferring to the cylinder.
• When charging refrigerant, the refrigerant should be taken out from the tank as liquid state. Mark the refrigerant amount
added that was calculated by the pipe length on the unit label.
Secure refrigerant piping
• During operation, the pipe will vibrate, expand or shrink. If not being secured, the refrigerant will focus on one part and
cause the pipe to break.
• To prevent stressing the pipe, secure the pipe every 6.56-9.84ft.(2-3m).
Tighten as per the torque table below:
Tighten torque Ib.in(N.m)
Shaft (valve body) Cap (cover) T-shape nut (check joint)
For gas pipe less than 61.9(7) less than 265.2(30) 114.9(13)
For liquid pipe 69.4(7.85) (MAX138.8(15.7)) 260(29.4)(MAX346.5(39.2)) 77.8(8.8) (MAX130(14.7))
Additonal refrigerant charging per Ib (Ib/ft.)
Charge when out of factory
Ø5/8" Ø1/2" Ø15.88 Ø3/8" Ø1/4" Ø6.35
0.113 0.073 0.037 0.11 0.015 0.022 Refer to label
GWP: 2088
The product contains uorinated greenhouse gases and its functioning relies upon such gases.
(9) Additional refrigerant charging
• Start: press Start and Stop keys on the main control board at the same time for 5 seconds. The unit will start automatic
recovery mode. The compressor starts, the right side of the unit C0 and Ps LEDs start ashing, runs for around 3
minutes.
• Operation: when the LEDs C1 and Ps alternately ash, manually shut off the liquid pipe valve
• Off valve: when Ps < 1kg, LED displays C2, quickly close the shut-off valve, after 5 seconds the system will shut down.
• End: manually power down the system to reset the program.
• Note: in heating, standby or while shutdown: the outdoor unit is forced into refrigeration operation.
(10) Refrigerant recovery
• Remove the valve cap.
• Turn the liquid stop valve and the gas stop valve with hexangular spanner until it stops. If the valve is opened with too
much force the valve will be damaged.
• Tighten the valve cap.
(8) Check vale operation
The unit is charged with R410A refrigerant. The details below should be paid attention to:
• To prevent different oils from getting into the pipe, please use the specic tool for R410A, especially for manifold gauge
and charging hose.
• To prevent the compressor oil from getting into the refrigerant cycle, please use the anti-counter-ow adapter.
13
Electric wiring and the application
WARNING
• Turn off the main power switch of the indoor
and outdoor unit for 1 minute or more before
wiring or servicing.
• To prevent damaging the wires and electrical
components, avoid installing around animals. It
may lead to the occurrence of re.
• To prevent damaging the wires, avoid contact
with refrigerant pipes, steel edges and electrical
components. It may lead to the occurrence of
re.
CAUTION
• Secure the power cord with a wire tie in the
unit.
CAUTION
• When using 3 phase 5 wire power, the
power supply of the indoor machine must be
connected using L1 and N. Do not use L1-L2,
L1-L3, otherwise the unit electrical components
will be damaged.
Note:
when the outdoor unit is not using a circuit, it
should be sealed with a rubber blocker.
Inspect
• Conrm that the electrical equipment used on the installation site
• (main power switch, circuit breaker, wire, conduit and wiring
terminals, etc.) have been selected according to current data, to
ensure that the device in line with national standards.
• Conrm that the power supply voltage is within +/-10% of the
rated voltage and that the unit is properly grounded to prevent
damage to the electrical components.
• Check for correct voltage. Otherwise, the compressor will not start
if the voltage is too low.
• Measure the resistance between the ground and the electrical
terminals and ensure that there is more than 1MΩ. Otherwise, the
system will not start. Fix the issue prior to operating the system.
Connection
• Connect the power cord to the terminal of the indoor unit and the
outdoor electrical box, connect the ground wire to the grounding
bolt of the outdoor unit and the indoor electrical box.
• Connect the outdoor and indoor communication wire to the 1 and
2 terminals on the terminal block. If the power cord is connected
to the communication terminals, the circuit board will be damaged.
• Use shielded twisted pair wire.
• Do not screw to the front of the cover.
• The power wire must be made of copper wire, and the power
supply must conform with IEC 60245 requirements. If the power
cord length exceeds 20m
• use a larger gauge wire.
• Use a round terminal connection on the wire with an insulating
protective sleeve.
• Secure the wire away from any sharp edges and materials that
may damage the wire to prevent damage and causing a re or
damage.
Signal wiring:
The outdoor unit and all the indoor units are
connected in parallel through with shielded two
wire cord.
Communication wiring gure
Outdoor
Indoor 1
Indoor 3 Indoor 4 Indoor 5 Indoor 6
Indoor 2
Communication wire with polarity
wired
controller
P Q A B C
P Q A B C
P Q A B C P Q A B C P Q A B C
P Q A B C
A B C
A B C
A B C
A B C
A B C
A B C
P Q
wired
controller
wired
controller
wired
controller
wired
controller
wired
controller
14
The outdoor and all indoor units are connected in parallel through 2 non-polar wires. Three wiring options between the
wired controller and indoor unit:
A. One wired control to control multiple units, i.e. 2-6 indoor units, as shown in the above gure, (1-2 indoor units). The
indoor unit 2 is the wire controlled main unit and others are the wired controlled sub units. The remote control and the
main unit (directly connected to the indoor unit of wired control) are connected via three wires with polarity.
B. One wired control controls one indoor unit, as shown in the above gure (indoor unit 3-5). The indoor units and the
wired control are connected via three lines with polarity.
C. Two wired controls control one indoor unit, as shown in the gure (indoor unit 6). Either of the wired controls can be set
to be the master wired control while the other is set to be the auxiliary wired control. The master wired control and
indoor units, and the master and auxiliary line controls are connected via three lines with polarity.
Electric wiring and the application
Outdoor power source and power cable
Item
Model
Power
source
Power cable
section
Circuit
breaker
(A)
Rated current of residual
circuit breaker (A)
Ground fault interruptor (mA)
response time (S)
Ground wire
Section
(mm
2
)
Screw
Individual
power
MVHP036MV2AA
MVHP048MV2AA
MVHP056MV2AA
208/230V~, 60Hz 7AWG 50 50A 30mA below 0.1S 7AWG
3/16”
(M5)
• Power cable must be xed rmly.
• To avide electrical shock, make sure to disconnect the power supply 1 minute or more before servicing the electrical
parts.Even after 1 minute,always measure the voltage at the terminals of main circuit capacitors or electrical parts and
before touching, make sure that those voltages are 50VDC or less.
• To persons in charge of electrical wiring work: Do not oerate the unit until the refrigerant piping is complete.(Running it
before the piping is ready will break the compressor)
• Each outdoor must be earthed well.
• When power cable exceeds the range, thichen it appropriately.
• The appliance shall be installed in accordance with national wiring regulations.
• All wiring must be performed by an authorized electrician.
• Be sure to install an earth leakage circuit breaker in accordance with applicable legislation.Failure to do so many
cause electrical shock.
Power wiring gure
Indoor and outdoor use their individual power source. All indoors use one power source. Must install the leakage breaker
and the over current breaker, or electric shock will occur.
power source: 208/230V~, 60Hz
indoor 1
(wall mounted unit)
power source: 208/230V~, 60Hz
indoor 2
(wall mounted unit)
power source: 208/230V~, 60Hz
indoor 3
(non wall mounted unit)
power source: 208/230V~, 60Hz
outdoor
L1(L) L2(N)
L1(L) L2(N)
L1(L) L2(N)
L1(L) L2(N)
15
Electric wiring and the application
Indoor power source and communication wiring
Item
Indoor
total
current (A)
Power cable
section
Wire length
ft.(m)
Rated current
of overcurrent
breaker
(A)
Rated current of residual
circuit breaker(A)
Ground fault interruptor(mA)
response time(S)
Communication wire section
Outdoor/indoor Indoor/indoor
<10 14AWG 75.5(23) 20 20A, 30mA, below 0.1s
2-core × (18-14AWG)
shielded wire
≥10 and <15 11AWG 78.7(24) 30 30A, 30mA, below 0.1s
≥15 and <22 9AWG 88.6(27) 40 40A, 30mA, below 0.1s
≥22 and <27 7AWG 137.8(42) 50 50A, 30mA, below 0.1s
• Power cable and communication wire must be rmly connected.
• Each indoor unit must be properly grounded.
• When power cable exceeds the range, use a larger gauge as required.
• The Shielded layer of the communication wires must be connected together and be grounded at at each point.
• Communication wire total length cannot exceed 1000m.
WARNING
• Power lines must be copper wire.
• All indoor and outdoor units must be grounded properly. The ground wire must not be grounded using a gas pipe,
water pipe, lightning rod or telephone wire. If the grounding is correct it may cause electric shock or re.
• Power supply must be installed with an earth leakage circuit breaker, otherwise it may cause electrical shock or re.
• The operation and maintenance of the electrical equipment shall be carried out with the power supply off.
• The indoor and outdoor units each get their own independent power supply.
• The communication line and the power line must be separate.
Communication wire for wired controller
Wire length (ft.(m)) Wire spec Wire length(m) Wire spec
<328(100) 22AWG ×(3-core) shielded wire ≥984(300)and <1312(400) 16AWG ×(3-core) shielded wire
≥328(100) and <656(200) 19AWG×(3-core) shielded wire ≥1312(400) and <1968(600) 14AWG ×(3-core) shielded wire
≥656(200) and <984(300) 18AWG ×(3-core) shielded wire
• Shielded layer of communication wire must be grounded at one end.
• The total length cannot exceed 600m.
16
Electric wiring and the application
When using a single terminal without a terminal connector, the wire
can not be directly connected without ux. It will cause abnormal
heating of the terminal connector. If a single core wire is used for the
wiring, it can be connected directly as shown in the diagram.
ErrorCorrect
Outdoor unit electrical wiring diagram
Ground wire
Power cord
Communication line
Secure the power line and communication
line with a wire clip on the terminal block
Power lines and communication
lines need to be ame retardant
and use high temperature
resistant insulation
Use plastic pipe insulation
on the refrigerant pipe
Protect the power line and
communication line hole with
a wire sheath
Power line and piping need to be
wrapped with ame retardant tape
Cable sheath
Communication
line
Power cord
17
Installation and debugging
1. Installation and debugging method of outdoor machine
SW01 SW02 Seven segment digital tube display content
0
0
Outdoor machine fault code
The machine units are not locked and no fault, in turn cycle "in the machine number, machine
capacity, power supply type".
(1) The connection machine number: display "U" + machine units.
Such as "U08" means that the machine is connected to the 8 internal machine .
(2) Outdoor mechanism cold capacity: such as 48 machine display 48(uint:KBtu/h).
(3) Power supply type: 1PH represents a single phase, and the 3PH represents a three-phase).
1 Outdoor operation mode (stop: OFF, refrigeration: CCC, heating: HHH)
2 Program version
3 E2 Edition
4
Compressor target frequency.(according to Start 5 seconds, into the manual frequency control, Up/
Down adjustment frequency, according to Stop for 5 seconds, exit the manual frequency control.
Manual control, the frequency of ashing display, non manual control, the frequency of normal
display.
5 Actual frequency of compressor
6 In machine units
7 The machine units
8 Outdoor machine capacity (unit:KBtu/h)
9 External fan 1 (FAN1) speed (unit: RPM, maximum display of 999)
A External fan 2 (FAN2) speed (unit: RPM, maximum display of 999)
B The average Tc2 temperature of the internal machine (unit: Fahrenheit)
C The actual average Tc2 temperature of the unit (unit: Fahrenheit)
D Superheat of heating target (unit: Fahrenheit)
E
Special running state of the mach:
First bit: power supply type (0- single phase 1- three-phase);
Second place: Mute (0- off, 1- open);Third place: the air to run (0- off, 1- open)
(101: three phase power supply, mute off, open the gas)
F
Forced fan running, no mandatory display "FAN" (according to Start 5 seconds into the fan manual
control, Up/ Down adjust the fan gear, according to the Stop 5 seconds, exit fan manual control),
mandatory display "0-15", this function is not affected by external fault inuence
1
0 Td: exhaust gas sensor (unit: Fahrenheit)
1 Ta: ring temperature sensor (unit: Fahrenheit)
2 Ts: suction sensor (unit: Fahrenheit)
3 Te: defrost sensor (unit: Fahrenheit)
5 Pd: High pressure pressure (unit: psi)
6 Ps: Low pressure (unit: psi)
7 Outdoor machine PMV opening (unit: pls, maximum display 999)
8
Valve state First bit: 4WV (0- closed, 1- open); Second bit: SV1 (0- closed, 1- open); the third bit:
SV2 (0- off, 1- open) (example 101 indicates that the 4WV is turned on, the SV1 is turned off, the
SV2 is turned on)
9
First:high voltage switch HPS (0-disconnect,1-closed); second:low voltage switch LPS
(0-disconnect,1-closed);third:heating belt(0-closed,1-open)(101:HPS LPS closed off, open the heating
zone)
A Tn: module temperature (unit: Fahrenheit)
B Press current (unit: A, 1 decimal)
D Module DC voltage (unit: V)
E
CT current (unit: A, 1 decimal)
Forced refrigeration alternately display "CCC" (press Start 5 seconds to enter, all internal cooling
operation, according to Stop 5 seconds exit).
18
SW01 SW02 Seven segment digital tube display content
1 F
Forced heat alternating display "HHH" (according to Start 5 seconds to enter, all the internal
mechanism of hot running, press Stop to exit for 5 seconds).
2 0-F Communication shows the program version (1 decimal), or "---"
3 0-F
The machine type: (0:common indoor machine; 1:wall hanging; 2:Fresh air machine ; 3:heat
exchanger, 4/5/6/7:common indoor machine).
4 0-F If there is a failure to show the internal fault code, otherwise, "---"
5 0-F Indoor machine capability (unit:KBtu/h)
6 0-F
First and the second: indoor machine current mode of operation,
(00: off, 01: air supply, 02: cooling, 03: dehumidication, 04: heating) , the third: external machine
capacity requirements (0: No, 1: Yes)
7 0-F Indoor machine PMV opening (unit: pls, maximum display 999)
8 0-F
Indoor unit of air conditioner:
First: oat switch (0- disconnect, 1- closed)
Second place: water pump (0- closed, 1- open)
Third place: electric heating (0- closed, 1- open)
(110 oat switch is closed, the water pump is opened, the electric heating off)
9 0-F Indoor machine TA: ambient temperature value (unit: Fahrenheit)
A 0-F Indoor TC1: air temperature value (unit: Fahrenheit)
B 0-F Indoor machine TC2: liquid pipe temperature (unit: Fahrenheit)
C 0-F Indoor machine motor: room running wind speed (0- stop, 1- low wind, 2- stroke, 3- high wind)
2. Supercooling valve plate module parameter display
SW01 SW02 Seven segment digital tube display content
D
0 Over cooling valve plate failure code (cold plate module sent)
1 Super cooled valve plate program version (1 decimal)
2 Target opening of the expansion valve of the supercooling valve plate(unit: pls, max: 999)
3 The current opening of the expansion valve of the cold valve plate (unit: pls, max: 999)
4 Tc1 temperature of supercooling valve plate (unit: Celsius)
5 Tc2 temperature of supercooling valve plate (unit: Celsius)
6 Set aside (display "---")
7 Set aside (display "---")
8 Set aside (display "---")
9 Set aside (display "---")
Installation and debugging
19
BM1_1 Indoor searching after startup
0 Begin to search indoor
1 Stop searching indoor and lock the quantity
BM1_2 Celsius/Fahrenheit area selection
0 Celsius area
1 Fahrenheit area
BM1_3 External static pressure
0 High
1 Low
BM1_4 Energy saving or refrigeration effect priority
0 Energy saving priority
1 Refrigeration effect priority
BM1_5 Indoor simultaneous control
0 No
1 Yes
BM1_6 Defrosting condition selection
0 Not easy to frost area
1 Easy to frost area
BM1_7 Defrosting level
0 Ordinary
1 Strengthen
BM1_8 Silent operation selection
0 Forbidden(without silent operation)
1 Allow (with silent operation)
3. Outdoor unit PCB dipswitch setting(Pay attention to the identication of the computer board).
In the following table, 1 is ON, 0 is OFF.
4. bridge instruction
CJ1:
Short it before power ON-- PCB check its function (used for factory production).
Short it after power ON-- time short function, 60 seconds become to 1 second.
CJ2: Reserved
BM1 introduction
BM2 introduction
BM2_1 Cold only or heat pump
[1] Cold only or heat pump
0 Heat pump(default)
1 Cold only
BM2_2
BM2_3
BM2_4
Outdoor horse power selection
[2] [3] [4] Outdoor horse power selection
1 0 0 36
1 0 1 48
1 1 0 56
BM2_5 Power source selected
[5] Power source selected
0 Single-phase
1 Three-phase
BM2_7
BM2_8
Running mode preference
[7] [8] Running mode preference
0 0 Start rst(default)
0 1 Later start rst
1 0 Cooling rst
1 1 Heating rst
Note: Either indoor unit unlocked or the locked quantity different with actual connecting number, it cannot run.
Installation and debugging
20
Failure code
Inverter outdoor unit failure code
Digital tube
indication
on master
unit
Indication
on wired
controller
(hex)
Failure code
denition
Failure description Remarks
20 20-0
Defrosting temp
sensor Te1 failure
AD value is below 11(open circuit) or over 1012(short circuit)
for 60seconds, in cooling mode, if the sensor is abnormal,
the unit operate in defrosting and within 3 minutes after
defrosting, no alarm
Resumable
21 21
Ambient temp.
sensor Ta failure
AD value is below 11(open circuit) or over 1012(short
circuit) for 60seconds, in defrosting and within 3 minutes
after defrosting, no alarm
Resumable
22 22
Suction temp.
sensor Ts failure
AD value is below 11(open circuit) or over 1012(short
circuit) for 60seconds, in defrosting and within 3 minutes
after defrosting, no alarm
Resumable
23 23
Discharging temp.
sensor Td failure
After compressor is running for 5 minutes, AD value is below
11(open circuit) or over 1012(short circuit) for 60seconds,
in course of startup, defrosting and within 3 minutes after
defrosting, no alarm
Resumable
26 26-0
Indoor
communication
failure
For continuous 200 cycles, can not nd connected indoors
Resumable
26-1 26-1
For continuous 300seconds, the searched indoor quantity is
less than the set quantity.
26-2 26-2
For continuous 300seconds, the searched indoor quantity is
more than the set quantity.
28 28
High pressure
sensor Pd failure
AD value is below 11(open circuit) or over 1012(short
circuit) for 30seconds, in defrosting and within 3 minutes
after defrosting, no alarm
Resumable
29 1D
Low pressure
sensor Ps failure
AD value is below 11(open circuit) or over 1012(short
circuit) for 30seconds, in defrosting and within 3 minutes
after defrosting, no alarm
Resumable
30 30
High pressure
switch HPS failure
If disconnect for 50ms continuously, alarm. If alarm 3 times
in an hour, conrm the failure
Once
conrmation,
un-resumable
33 33 EEPROM failure EEPROM failure
Once
conrmation,
un-resumable
34 34
Discharging temp.
too high protection
(Td)
Td≥239°F(115°C) at interval of 25msec for twice
continuously, and over the set value, then stop and alarm;
3 minutes later, resume automatically. If it occurs 3 times in
an hour, conrm the failure.
Once
conrmation,
un-resumable
35 35
4-way valve
reversing failure
After 4-way valve is electried for 3 minutes, if the below
conditions can be met for continous 10 seconds, that is
conversing successfully:
1. this outdoor compressor is running normally
2. Pd-Ps≥87PSI(0.6MPa), Otherwise, the system alarms
reversing failure.
Once
conrmation,
un-resumable
39-0 39-0
Low pressure
sensor Ps too low
protection
After compressor is running (except for residual operation),
if in cooling, Ps<0.05Mpa; in heating, Ps<0.03Mpa; in oil
return, Ps<0.03Mpa for continuous 5 minutes, alarm and
stop. 2 minutes and 50 seconds later, resume automatically,
if it occurs 3 times in an hour, conrm the failure.
Once
conrmation,
un-resumable
21
Failure code
Digital tube
indication
on master
unit
Indication
on wired
controller
(hex)
Failure code
denition
Failure description Remarks
39-1 39-1
Compression ratio
too high protection
After compressor is running, compression ratio 8. for
continuous 5 minutes stop and alarm.2 minutes and 50
seconds later, resume automatically, if it occurs 3 times in
an hour, conrm the failure.
Once
conrmation,
un-resumable
39-2 39-2
Compression ratio
too low protection
In normal operation, compression ratio <1.8 for continuous
5 minutes stop and alarm.2 minutes and 1 seconds later,
resume automatically, if it occurs 3 times in an hour, conrm
the failure.
Once
conrmation,
un-resumable
40 40
High pressure
sensor Pd too high
protection
In normal operation, Pd>=4.15Mpa for continuous 50ms,
alarm and stop. 2 minutes and 50 seconds later, resume
automatically, if it occurs 3 times in an hour, conrm the
failure.
Once
conrmation,
un-resumable
43 43
Discharging temp.
sensor Td too low
protection
In normal operation, if Td<CT+50°F
(10°C) for continuous 5 minutes, the unit stops and alarms.2
minutes and 50 seconds later, resume automatically. If it
occurs 3 times in an hour, conrm the failure. After xed
frequency compressor alarms, inverter compressor will
continue to run. If xed frequency compressor has been
locked for 3 times, the unit will stop and alarm.
Once
conrmation,
un-resumable
46 46
Communication
with inverter board
failure
No communication within 30 seconds continuously Resumable
53 53
CT current is too
low or current
sensor fault
3 minutes after recovery
3 times in an
hour, conrm
failure; once
conrmation,
un-resumable
54 54
Valve plate module
communication
fault
Cannot receive valve plate module signal in 200 continuous
rounds or receive wrong data,recover automatically when
received right data.
Resumable
57 57
Communication
failure between
valve plate
module and host
computer(sending
by valve plate)
Communication failure between valve plate module and
host computer
Resumable
58 58
Tc1 temp sensor
of valve plate
error(sending by
valve plate)
Tc1 temp. sensor cannot connect with valve plate module Resumable
59 59
Tc2 temp sensor
of valve plate
error(sending by
valve plate)
Tc2 temp. sensor cannot connect with valve plate module Resumable
60 60
Valve plate module
error(sending by
valve plate)
Reserved Resumable
61 61
Valve plate module
error(sending by
valve plate)
Reserved Resumable
22
Failure code
Digital tube
indication
on master
unit
Indication
on wired
controller
(hex)
Failure code
denition
Failure description Remarks
62 62
Valve plate module
error(sending by
valve plate)
Reserved Resumable
63 63
Valve plate dial
setting error
No valve plate module dial but the valve plate module is
detected.
Once
conrmation,
un-resumable
64 64
CT current is too
high
CT current exceeds specied value, 3 minutes after
recovery
3 times in an
hour, conrm
failure; once
conrmation,
un-resumable
71-0 71-0
Upper DC motor
blocked
Running at speed below 20rpm for 30s, or at speed of
70% lower than the target for 2 minutes, 2 minutes and 50
seconds later after stop, resume automatically. It occurs 3
times in an hour, conrm the failure.
Once
conrmation,
un-resumable
71-1 71-1
Lower DC motor
blocked
75 75-0
No pressure drop
between high
pressure and low
pressure
In 1 minute after INV compressor starts up, Pd-Ps≤0.1MPa,
then stop. 180 seconds later, resume automatically. If it
occurs 3 times in an hour, conrm the failure.
Once
conrmed,
unresumable
75-4 75-4
Too small pressure
drop between high
pressure and low
pressure
If Pd-Ps≤0.2MPa for 5 minutes, the outdoor unit protection
stop.
• 3 minutes after stopping protection, restart. If it occurs 3
times in an hour, conrm the failure.
Once
conrmed,
unresumable
78 78 Lack of refrigerant
Compressor running in cooling mode, Ps<0.2MPa for 30
minutes; compressor running in heating mode, Tsi - ET>20;
LEV will fully open for 60 minutes, the unit will output lack of
refrigerant alarm,unit will not stop.
--
81 81
IPM modular temp.
too high protection
IPM modular temp.≥185°F(85°C)
3 times in an
hour, conrm
failure; once
conrmation,
un-resumable
82 82
Compressor
current protection
Compressor current exceeds specied value, 3 minutes
after recovery
83 83
Outdoor model set
error
Model and the number of fans do not match Un-resumable
108 108
Transient over
current in IPM
module rectier
side software
Transient over current in IPM module rectier side software
3 times in an
hour, conrm
failure; once
conrmation,
un-resumable
109 109
Current detection
circuit abnormality
Current detection circuit abnormality
110 110
IPM modular
protection (F0)
IPM modular over current, in short circuit, over heat, voltage
too low of control circuit.
111 111
Compressor out of
control
In the course of compressor startup or running, the unit can
not detect the rotor position, or not connecting compressor.
112 112
Radiator of
transducer temp.
too high
Radiator temp. too high
113 113
Transducer
overload
Output current of transducer is too high
23
Failure code
Digital tube
indication
on master
unit
Indication
on wired
controller
(hex)
Failure code denition Failure description Remarks
114 114
Voltage too low of DC bus
line of transducer
Voltage of power source is too low
3 times in an
hour, conrm
failure; once
conrmation,
un-resumable
115 115
Voltage too high of DC
bus line of transducer
Voltage of power source is too high
116 116
Communication abnormal
between transducer and
control PCB
Communication is disconnected Resumable
117 117
Transducer over current
(software)
Compressor startup fails for 5 times continuously, or
compressor is running down till stops caused by over
current or over heat
3 times in an
hour, conrm
failure; once
conrmation,
un-resumable
118 118
Compressor startup
failure
The sensor used for current detecting of transducer
is abnormal, disconnected or incorrectly connection
119 119
Detecting circuit of
transducer current is
abnormal
Current detection sensor of frequency controller is
abnormal or unconnected or connected wrongly.
120 120
Power supply of
transducer abnormal
Power supply of transducer is broken down instantly
121 121
Power supply of inverter
board is abnormal
Power supply of inverter board is broken down
instantly
3 times in an
hour, conrm
failure; once
conrmation,
un-resumable
122 122
Radiator temp.sensor of
transducer abnormal
Resistor of temp.sensor abnormal or temp.sensor
disconnected
123 123
Transient over current in
IPM module rectier side
hardware
Transient over current in IPM module rectier side
hardware
When there is no failure, if the starting condition can not be met, digital tube on master unit will display stand-by code:
555.0
Standby state of capacity
overmatch
When capacity is over 130% or lower than 50%, the system is
standby.
Resumable555.1
Outdoor ambient temperature
too high (heating)
Ta>80.6°F, Standby
555.3
Outdoor ambient temperature
too high or too low (cooling)
Ta>129.2°F or Ta<14°F, Standby
Indication on
master unit
Indication on wired
controller
Flash times of LED5 on
indoor PCB/timer LED
on remote receiver
Failure code denition
01 01 1 Indoor ambient temp. sensor Ta failure
02 02 2 Indoor coil temp. sensor Tc1 failure
03 03 3 Indoor coil temp. sensor Tc2 failure
04 04 4 Indoor TW sensor failure
05 05 5 Indoor EEPROM failure
06 06 6 Communication between indoor and outdoor failure
07 07 7 Communication between indoor and wired controller failure
08 08 8 Indoor drainage failure
09 09 9 Indoor repeated address
0A 0A 10 Indoor repeated central control address
Outdoor
failure code
Outdoor failure
code
20 Outdoor corresponding failure
Indoor failure code list
24
Conrm the type of outdoor machine and the number of inside machine
• After installation, please conrm that the outdoor computer board BM1_1 is in the 0 state and then check the digital
display. If the number of indoor units, the outdoor unit type and the power supply voltage is correct, change the BM1_1
dial to the 1 state. If it is not correct, please check the dial machine communication code and models, do not force the
BM1_1 dial to the 1 state, it may cause system failure.
Trial operation and the performance
5-minute delay function
• If starting up the unit after being powered off, the compressor will run about 5 minutes later against being damaged.
Cooling/heating operation
• Indoor units can be controlled individually, but cannot run in cool and heat mode at the same time. If cool mode and the
heat mode set at the same time, the unit set last will be set to standby, and the unit set rst will run normally. If the A/C
manager sets the unit to allow only cooling or only heating mode, the unit can not run at the other modes.
Heating mode characteristic
• While operating, if the outdoor temp. rises, the indoor fan motor will run at a low speed or stop.
The unit operation condition
• Please only operate the unit under the specied temperature range. If operating outside of the range, protection modes
will cause the unit to stop operating.
• The relative humidity should be lower than 80%. If the unit runs while the humidity is over 80% for a long period, the
dew on the unit will drop down and vapor will be blown from air outlet.
Protection device (such as high pressure switch)
• The unit has a high pressure switch which can stop system operation to protect the unit from damage. When the high
pressure switch activates, cooling/heating mode will stop but the running LED on the wired controller will still be lit. The
wired controller will also display an error code. The high pressure switch can be triggered by the following:
In cooling mode, air outlet and air inlet of the outdoor unit are clogged.
In heating mode, the indoor lter is full of dust; indoor air outlet is clogged.
When the protection mode goes off, please turn off the power and re-start the unit after eliminating the problem.
Defrosting in heating mode
• In heating mode, defrosting will affect the heating efciency. The unit will defrost for about 2~10 minutes automatically.
During defrost, any frost will melt and condensate will ow from outdoor unit. While defrosting vapor will appear at the
outdoor unit, which is normal. The indoor motor will run at low speed or stop, and the outdoor motor will stop.
When power failure
• When there is a power failure while the unit is running, all the operations will stop.
• After being powered again, if the re-start up function is enabled, the unit can resume to the last state before losing
power; if the re-satrt up function is disabled, the unit needs to be switched on again manually.
• When abnormal operation occurs while running because of the storms, radio interference, etc, please turn off the power
source. After eliminating the interference, press the "ON/OFF" button to start up the unit again.
Heating capacity
• A heat pump in heating mode absorbs the outdoor heat energy and releases it indoor. As the outdoor temperature goes
down, the heating capacity will decrease.
System marks
• When multiple MRVII-S systems are installed, to identify the matching outdoor and indoor, please label on the outdoor
electric control box cover to indicate the connected indoor unit as shown in the below gure:
Indoor model:
Room No.
e.g. Indoor A, system 1, Floor 2 2F-1A
25
Trial operation
• Before trial operation:
Before being powered on, measure the resistance between the power terminal block (live wire and neutral wire) and
the ground point with a multimeter. Check if it is over 1M Ω. If it is not, the unit will not operate.
To protect the compressor, power the outdoor unit for at least 12 hours before running the unit. If the crankcase
heater is not powered on for 6 hours, the compressor will not work.
Conrm the bottom of the compressor is getting hot.
Except for when there is only one master unit connected (no slave unit), for all other conditions, fully open the outdoor
service valves (gas side, liquid side). If the unit is operated without opening the valves, compressor failure will occur.
Conrm all indoor units are powered. If not, water leakage will occur.
Measure the system pressure while the unit is operating.
• Trial operation
During trial operation, refer to the information in the performance section. If the unit can not start up at the current
room temperature, enter trial operation at the outdoor unit.
Trial operation and the performance
Qingdao Haier Air Conditioner Electric Co.,Ltd.
Haier Industrial Park,Qianwangang Road,Eco-Tech Development Zone,Qingdao 266555,
Shandong,P.R.C.
