FOUR-WAY CASSETTE
AB SERIES, HEAT PUMP
USER MANUAL
FOR MODELS:
2PAMSCH09
2PAMSCH12
2PAMSCH18
MULTI-ZONE
Before using your air conditioner, please
read this manual carefully and keep it for
future reference, along with your receipt.
CONTENTS
IMPORTANT SAFETY INFORMATION................................................................................... 1
HINTS FOR ECONOMICAL OPERATION .............................................................................. 2
PART NAMES ......................................................................................................................... 3
MANUAL OPERATION............................................................................................................ 4
ADJUSTING AIR FLOW DIRECTION ..................................................................................... 4
MAINTENANCE ...................................................................................................................... 5
AIR CONDITIONER OPERATION AND PERFORMANCE ..................................................... 7
INSTALLATION ....................................................................................................................... 8
TROUBLESHOOTING ............................................................................................................ 9
TROUBLESHOOTING (REMOTE CONTROL)....................................................................... 9
Danger
No
Household
Drain
Cleaner
IMPORTANT SAFETY INFORMATION
Do not attempt to install this unit by yourself.
This unit requires installation by an authorized service
technician or certified HVAC contractor.
Do not use caustic household drain cleaners in the unit. Drain
cleaners can quickly destroy the unit components (drain pan and
heat exchanger coil, etc).
CAUTION
CAUTION
NOTE
DANGER
DANGER
WARNING
WARNING
WARNING
Do not attempt to service the unit yourself. This unit has no user
serviceable components. Opening or removing the cover will
expose you to dangerous voltage. Tuning off the power supply will
not prevent potential electric shock.
To avoid the risk of serious electrical shock, never sprinkle or
s
pill water or liquids on unit.
Ventilate the room regularly while the air conditioner is in use,
especially if there is also a gas appliance in use in this room.
Failure to follow these directions may result in a loss of oxygen
in the room.
To prevent electric shock, turn off the power or disconnect the
power supply plug before beginning any cleaning or other routine
maintenance. Follow the directions for cleaning in the Owner's
Manual.
1
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No
Thinner
DANGER
Never put hands or objects into the Air Outlet of indoor or outdoor
units. These units are installed with a fan running at high speed.
To touch the moving fan will cause serious injury.
Do not use liquid cleaners or aerosol cleaners. Use a soft and dry
cloth for cleaning the unit. To avoid electric shock, never attempt
to clean the units by sprinkling water onto it.
For proper performance, operate the unit in temperature and
humidity ranges indicated in this owner's manual. If the unit is
operated beyond these conditions, it may cause malfunctions
of the unit or condensate dripping from the unit.
HINTS FOR ECONOMICAL OPERATION
The following should be noticed to ensure an economical operation. (Refer to corresponding chapter
for details.)
Adjust the air flow direction properly to avoid winding toward your body.
Adjust the room temperature properly to get a comfortable situation and to avoid supercooling and
superheat.
In cooling, close the curtains to avoid direct sunlight.
To keep cool or warm air in the room, never open doors or windows more often than necessary.
Set the timer for the desired operating time.
Never put obstructions near the air outlet or the air inlet. Or it will cause lower efficiency, even a
sudden stop.
If you don't plan to use the unit for a long time, please disconnect power and remove the batteries
from the remote control. When the power switch is connected, some energy will be consumed,
even if the air conditioner isn't in operation. Disconnect the power to save energy; Switch the
power on 12 hours before you restart the unit to ensure a smooth operation.
A clogged air filter will reduce cooling or heating efficiency. Please clean it once every two weeks.
2
NAMES AND FUNCTIONS
a) indoor unit
c) remote control
e) air-out
g) air flow louver (at air outlet)
i ) drain hose
k) drain pump (drain water from indoor unit)
m) temporary button
b) outdoor unit
d) air-in
f ) air outlet
h) connecting pipe
j ) air inlet (with air filter in it)
l ) infrared signal receiver
n) operation lamp
3
o) timer indicator
p) PRE-DEF indicator (cooling and heating type) or fan only indicator (cooling only type)
q) alarm indicator
PART NAMES
f
b
d
e
i
m
n
l
o
p
c
q
a
j
k
e
g
d
e
Display Panel
The air conditioner consists of the indoor unit, the outdoor unit, the connecting pipe and the remote
control
.
Cassette
NOTICE!
The above diagram is based on a 24000Btu/h unit. Therefore, a few differences may exist from the
look and functions of your system.
b
d
e
or
MANUAL OPERATION
TEMPORARY
BUTTON
Four-way Cassette
This function is used to operate the unit temporarily in case you misplace the remote control or its
batteries are exhausted. Two modes including AUTO and mandatory COOL can be selected through
the TEMPORARY BUTTON on the air inlet grill control box of the indoor unit. Once you push this
button, the air conditioner will run in such order: AUTO, mandatory COOL, OFF, and back to AUTO.
AUTO
The OPERATION lamp is lit, and the air
conditioner will run under AUTO mode. The
remote control operation is enabled to operate
according to the received signal.
MANDAT
ORY COOL
The OPERATION lamp flashes, the air conditioner
will turn to AUTO after it is enforced to cool with a
wind speed of HIGH for 30 minutes.
The remote
control operation is disabled.
OFF
The OPERATION lamp goes off. The air
conditioner is OFF while the remote control
operation is enabled.
1
2
3
4
ADJUSTING AIR FLOW DIRECTION
Cassette Type
While the unit is in operation, you can adjust the air flow louver to change the flow direction and natu-
ralize the room temperature evenly. Thus you can enjoy it more comfortably.
1. Set the desired air flow direction.
button to adjust the louver to the desired position and push this button again toPush the SWING
maintain the louver at this position.
2. Adjust the air flow direction automatically.
Push the SWING button, the louver will swing automatically.
While this function is set, the swing fan of indoor unit runs; otherwise, the swing fan doesn't run. The
swing scale of every side is 30
0
. When the air conditioner isn't in operation (including when "TIMER
ON" is set), the SWING button will be disabled.
ADJUST IT UP AND DOWN
MAINTENANCE
5
WARNING
Cleaning the indoor unit and remote controller
WARNING
Before you clean the air conditioner, be sure to disconnect the power supply plug.
If you do not plan to use the unit for at least 1 month.
(1) Operate the fan for about half a day to dry the inside of the unit.
(2) Stop the air conditioner and disconnect power.
(3) Remove the batteries from the remote controller.
!
!
CAUTIONS
Use a dry cloth to wipe the indoor unit and remote control.
A cloth dampened with cold water may be used on the indoor unit if it is very dirty.
Never use a damp cloth on the remote control.
Do not use a chemically-treted duster for wiping or leave such material on the unit for long,
because it may damage or fade the surface of the unit.
Do not use benzine, thinner, polishing powder, or similar solvents for cleaning. These may
cause the plastic surface to crack or deform.
Checks before operation
Cleaning the air filter
Check that the wiring is not broken off or disconnected.
Check that the air filter is installed. (Some air-conditioners haven't air filters.)
Check that the outdoor unit air outlet or inlet is not blocked.
Before you clean the air conditioner, be sure to disconnect the power supply plug.
The air filter can prevent the dust or other particulate from going inside .In case of blockage of the filter , the
working efficiency of the air conditioner may greatly decrease .Therefore , the filter must be cleaned once two
weeks during long time usage.
If the air conditioner is positioned in a dust place , the cleaning frequency of the air filter must be increased .
If the accumulated dust is too heavy to be cleaned , please replace the filter with a new one(replaceable air
filter is an optional fitting).
The filter cleaning should be performed by a suitable service provider.
CAUTIONS
!
A B
1. Open the air-in grill
Push the grill switches towards the middle simultaneously as indicated in sketch A. Then pull down
the air-in grill.
Cautions: The control box cables ,which are originally connected with the main body electrical terminators
must be pulled off before doing as indicated above.
Cassette Type
6
2. Take out the air-in grill (together with the air filter shown in Sketch B)
Pull the air-in grill down at 45
o
and lift it up to take out the grill.
3. Dismantle the air filter
4. Clean the air filter(Vacuum cleaner or pure water may be used to clean the air filter. If the dust
accumulation is too heavy , please use soft brush and mild detergent to clean it and dry out in cool
place) .
Three-minute protection feature
Power failure
A protection feature prevents the air conditioner from being activated for approximately 3 minutes
when it restarts immediately after operation.
Power failure during operation will stop the unit completely.
Disconnect the unit with the power and then connect the unit with the power again. Push the ON/OFF
button on the remote controller to restart operation.
The OPERATION lamp on the indoor unit will start flashing when power is restored.
T
o restart operation, push the ON/OFF button on the remote
control.
Lightning or a car wireless telephone operating nearby may cause the unit to malfunction.
7
AIR CONDITIONER OPERATIONS AND PERFORMANCE
Air conditioner operating conditions
For proper performance, run the air conditioner under the following temperature conditions:
Mode
Cooling operation
Heating operation
Drying operation
Temperature
1. If air conditioner is used outside of the above conditions, certain safety protection features
may come into operation and cause the unit to function abnormally.
2. Room relative humidity less than 80%. If the air conditioner operates in excess of this
figure, the surface of the air conditioner may attract condensation. Please sets the vertical
air flow louver to its maximum angle (vertically to the floor), and set HIGH fan mode.
3. Optimum performance will be achieved within these operating temperature.
Room temperature
Outdoor temperature
NOT E:
17
32
6
2 90
0 30
32 86
-7 24
20
76
1
8 43
64 109
-7 43 20 109
For the models with low
temperature cooling system
18 52 64 126
For special tropical models
(For special tropical models)
O O O O
17 C~ 32 C/ 62 F~ 90 F
O O O O
18 C~ 43 C/64 F~109 F
O O O O
18 C~52 C/64 F~126 F
Relocation
If you move out or if it is desired to relocate the air conditioner, consult your dealer, because special
skills to withdraw Freon, purge air and perform other operations are required.
Location:
Be careful of noise or vibrations
Wire
During cooling operation, the air conditioner will dry the room air, so please fix a pipe to drain all the
water away from the air conditioner.
Please let the indoor unit more than one metre away from the TV set and the radio in order to avoid
the picture and noise interference.
Powerful radio transmitters or any other devices radiating high frequency radio waves can cause
the air conditioner to malfunction. Please consult the dealer where you purchased the air conditio-
ner before installing it.
Don't fix the unit in the dangerous region with combustible gas or volatile matter.
If the air conditioner operates in an atmosphere containing oils (machine oil), salt (near a coastal
area), sulfide gas (near a hot spring), etc., such substances may lead to failure of the air conditioner.
Please fix the unit in the stable place to avoid the noise or vibrations.
The noise near the air outlet of the outdoor unit may enter the air exit.
Locate the outdoor unit where noise emitted by it or hot air from its air outlet will cause no nuisance
to your neighbours.
If the air conditioner sounds abnormal during operation, contact the dealer where you purchased the
air conditioner.
To avoid the electric shock, please link the air conditioner with the ground. The plug in the air
conditioner has joined the ground wiring, please don't change it freely.
The power socket is used as the air conditioner specially.
Don't pull the power wiring hard.
When linking the air conditioner with the ground, observe the local rulers.
If necessary, use the power fuse or the circuit, breaker or the corresponding scale ampere.
If you want to change the power wiring, please contact the centre service of the local MD electric
appliance.
INSTALLATION
8
Special functions
Refrigerant Leakage Detection(optional):
With this new technology, the dipsplay area will appear EC (if applicable) and the LED
indication lamps continue flashing when the outdoor unit detects refrigerant leakage.
Louver Angle Memory Function(optional):
For some models, the machine is special designed with louver angle memory function. Power
failure during operation or pressing the ON/OFF button on the remote control will stop the unit
completely.When the power restores or pressing the ON/OFF button on the remote control
again,the unit restarts automatically with the previous open angle of the horizontal louver by the
memory function.So we strongly recommend that the open angle of the horizontal louver should
not be set too small,in case the condensed water forms and drops from the horizontal louver.
Press the Manual control button and the open angle of the horizontal louver will be restored to
the standard angle.
Before you ask for servicing or repairs, check the following points.
Setting Change is Impossible
Symptoms
Causes
Reason and Disposal
The fan speed can not be
changed.
Check whether the MODE
indicated on the display is
"AUTO"
Check whether the MODE
indicated on the display is
"DRY"
When the automatic mode is
selected, the air conditioner
automatically selects the fan
speed.
When dry operation is selected,
the air conditioner automatically
select the fan speed. The fan
speed can be selected during
"COOL" and "FAN ONLY", and
"HEAT"
TROUBLESHOOTING
(CONCERNING REMOTE CONTROL)
TROUBLESHOOTING
Before you ask for servicing or repairs, check the following points.
The power fuse is blown or the circuit breaker has been tripped.
The batteries in the remote control are exhausted.
The timer is set.
A bad odor comes from the air conditioner.
The air inlet or outlet of the outdoor unit is blocked.
Doors or windows are open.
The air filter is clogged with dust.
The louver is not at the correct position.
The fan speed is set to low.
The temperature setting is too high or too low.
Smells impregnated in the wall, carpet, furniture, clothing, or furs, are coming out. A white mist
of chilled air or water is generated from the outdoor unit.
The indicator lamps flash rapidly (five times per second), you disconnect the unit with the power
and then connect the unit with the power again after two or three minutes but the lamps still flash.
Switch operations are erratic.
The fuse is blown frequently or the circuit breaker is tripped frequently.
Foreign matter or water has fallen inside the air conditioner.
Any other unusual condition is observed.
Recheck
These are not failures
Inoperative
Room air is smelly.
Does not cool or heat well.
If any of the following conditions occur, stop the air conditioner immediately, set to off the power
switch, and contact the dealer:
CAUTION
!
9
The Transmission Indicator " " Never Comes On
The Display Never Comes On
Symptoms
Symptoms
Causes
Causes
Reason and Disposal
Reason
The remote control signal is
not transmitted even when
the ON/OFF button is pushed.
The TEMP. indicator does
not come on.
Check whether the batteries
in the remote control are
exhausted.
Check whether the MODE
indicated on the display is
"FAN ONLY".
FAN ONLY
The remote control signal is
not transmitted, because the
power supply is off.
The temperature cannot be
set during fan only operation.
The Display Goes Off
Symptoms
Causes
Reason
The indication on the display
disappears after a lapse of
time.
The ON TIMER indicators
go off after a lapse of certain
time.
Check whether the timer
operation has come to an
end when the OFF TIMER
is indicated on the display.
Check whether the timer
operation is started when
the ON TIMER is indicated
on the display.
The air conditioner operation
stops since the set time
elapsed.
When the time set to start the
air conditioner is reached, the
air conditioner will automatically
start and the appropriate
indicator will go off.
The Signal Receiving Tone does Not Sound
Symptoms
Causes
Disposal
No receiving tone sounds
from the indoor unit even
when the ON/OFF button is
pushed.
Check whether the signal
transmitter of the remote
control is properly directed to
the receiver of the indoor unit
when the ON/OFF button is
pushed.
Direct the signal transmitter of
the remote control to the
receiver of the indoor unit, and
then repeatly push the ON/
OFF button twice.
Buttons on the remote
control
don't work.
Press Reset button.
10
Malfunction
1
2
3
4
5
6
7
8
9
10
12
13
14
15
16
17
18
19
20
21
22
23
24
25
11
Indoor EEPROM error
Water-level alarm malfunction
Indoor room temperature sensor
open circuit or short circuit
Indoor fan speed malfunction
Communication malfunction
between two indoor units (for
twins model)
Refrigerant leakage detection
malfunction
Evaporator coil temperature
sensor open circuit or short circuit
Other malfunction of twins model
Outdoor room temperature sensor
open circuit or short circuit
Current overload protection
High/Low voltage protection
Inverter module IPM protection
Lifting panel is not closed
Lifting panel malfunction
Lifting panel communication
checking channel is abnormal
T2b sensor error
Outdoor EEPROM error
Outdoor fan speed malfunction
(Only for DC fan motor)
Discharging air temperature
sensor error
Outdoor condenser pipe
temperature sensor error
E0.
E1.
E3.
E4.
E5.
EC.
EE.
E8.
E9.
F0.
F1.
F2.
F3.
F4.
F5.
F6.
F7.
F8.
F9.
P0.
P1.
P2.
P3.
P4.
P5.
ON.
ON.
ON.
ON.
ON.
ON.
ON.
ON.
ON.
ON.
Flash.
Flash.
Flash.
Flash.
Flash.
Flash.
High temperature protection of
compressor top
Mode conflict
Compressor drive error
Outdoor low temp. Protection
The following displays indicate an error or problem:
The displayed error code differs from appliance to appliance. The actual display of the indoor
unit shall prevail.
NO
Display (nixie tube)
timer lamp
running lamp (flashes per second)
Communication malfunction
between indoor and outdoor units
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
1
2
4
5
6
7
8
9
10
1
2
3
4
5
6
7
8
9
110
1
2
3
4
5
6
16122500000082
20150328
The design and specifications are subject to change without prior notice for product improvement.
Contact 844-472-2473 for details.
PA/Manual/01152018
QSBPQ4U-024AEN(A3)
Specification and performance data is subject to change without notice.
Printed in China
844-472-2473
www.perfectaire.us
Distributed by:
Perfect Aire, LLC
5401 Dansher Rd.
Countryside, IL 60525
