18 Exploded View and Replacement Parts List -----------81
18.1. Indoor Unit ------------------------------------------------- 81
18.2. Outdoor Unit ----------------------------------------------- 83
2
1Safety Precautions
• Read the following “SAFETY PRECAUTIONS” carefully before perform any servicing.
• Electrical work must be installed or serviced by a licensed electrician. Be sure to use the correct rating of the power plug and
main circuit for the model installed.
• The caution items stated here must be followed because these important contents are related to safety. The meaning of each
indication used is as below. Incorrect installation or servicing due to ignoring of the instruction will cause harm or damage, and
the seriousness is classified by the following indications.
This indication shows the possibility of causing death or serious injury.
This indication shows the possibility of causing injury or damage to properties.
• The items to be followed are classified by the symbols:
This symbol denotes item that is PROHIBITTED from doing.
• Carry out test run to confirm that no abnormality occurs after the servicing. Then, explain to user the operation, care and
maintenance as stated in instructions. Please remind the customer to keep the operating instructions for future reference.
1. Do not modify the machine, part, material during repairing service.
2. If wiring unit is supplied as repairing part, do not repair or connect the wire even only partial wire break. Exchange the whole wiring unit.
3. Do not wrench the fasten terminal. Pull it out or insert it straightly.
4. Engage authorized dealer or specialist for installation and servicing. If installation or servicing done by the user is defective, it will cause
water leakage, electrical shock or fire.
5. Install according to this installation instructions strictly. If installation is defective, it will cause water leakage, electrical shock or fire.
6. Use the attached accessories parts and specified parts for installation and servicing. Otherwise, it will cause the set to fall, water leakage,
fire or electrical shock.
7. Install at a strong and firm location which is able to withstand the set's weight. If the strength is not enough or installation is not properly
done, the set will drop and cause injury.
8. For electrical work, follow the local national wiring standard, regulation and the installation instruction. An independent circuit and single
outlet must be used. If electrical circuit capacity is not enough or defect found in electrical work, it will cause electrical shock or fire.
9. This equipment is strongly recommended to be installed with Earth Leakage Circuit Breaker (ELCB) or Residual Current Device (RCD).
Otherwise, it may cause electrical shock and fire in case equipment breakdown or insulation breakdown.
10. Do not use joint cable for indoor/outdoor connection cable. Use the specified indoor/outdoor connection cable, refer to installation
instruction CONNECT THE CABLE TO THE INDOOR UNIT and connect tightly for indoor/outdoor connection. Clamp the cable so that no
external force will be acted on the terminal. If connection or fixing is not perfect, it will cause heat up or fire at the connection.
11. Wire routing must be properly arranged so that control board cover is fixed properly. If control board cover is not fixed perfectly, it will cause
heat-up or fire at connection point of terminal, fire or electrical shock.
12. When install or relocate air conditioner, do not let any substance other than the specified refrigerant, eg. air etc. mix into refrigeration cycle
(piping). (Mixing of air etc. will cause abnormal high pressure in refrigeration cycle and result in explosion, injury etc.).
13. Do not install outdoor unit near handrail of veranda. When installing air-conditioner unit at veranda of high rise building, child may climb up
to outdoor unit and cross over the handrail and causing accident.
14. This equipment must be properly earthed. Earth line must not be connected to gas pipe, water pipe, earth of lightning rod and
telephone. Otherwise, it may cause electrical shock in case equipment breakdown or insulation breakdown.
15. Keep away from small children, the thin film may cling to nose and mouth and prevent breathing.
16. Do not use unspecified cord, modified cord, joint cord or extension cord for power supply cord. Do not share the single outlet
with other electrical appliances. Poor contact, poor insulation or over current will cause electrical shock or fire.
17. Tighten the flare nut with torque wrench according to specified method. If the flare nut is over-tightened, after a long period, the
flare may break and cause refrigerant gas leakage.
3
18. For R410A models, when connecting the piping, do not use any existing (R22) pipes and flare nuts. Using such same may
cause abnormally high pressure in the refrigeration cycle (piping), and possibly result in explosion and injury. Use only R410A
materials.
Thickness of copper pipes used with R410A must be more than 0.8mm. Never use copper pipes thinner than 0.8mm.
It is desirable that the amount of residual oil is less than 40 mg/10m.
19. During installation, install the refrigerant piping properly before run the compressor. (Operation of compressor without fixing refrigeration
piping and valves at opened condition will cause suck-in of air, abnormal high pressure in refrigeration cycle and result in explosion, injury
etc.).
20. During pump down operation, stop the compressor before remove the refrigeration piping. (Removal of refrigeration piping while
compressor is operating and valves are opened condition will cause suck-in of air, abnormal high pressure in refrigeration cycle and result
in explosion, injury etc.).
21. After completion of installation or service, confirm there is no leakage of refrigerant gas. It may generate toxic gas when the refrigerant
contacts with fire.
22. Ventilate if there is refrigerant gas leakage during operation. It may cause toxic gas when the refrigerant contacts with fire.
23. Do not insert your fingers or other objects into the unit, high speed rotating fan may cause injury.
24. Must not use other parts except original parts describe in catalog and manual.
1. Do not install the unit at place where leakage of flammable gas may occur. In case gas leaks and accumulates at surrounding of
the unit, it may cause fire.
2. Carry out drainage piping as mentioned in installation instructions. If drainage is not perfect, water may enter the room and damage the
furniture.
3. Tighten the flare nut with torque wrench according to specified method. If the flare nut is over-tightened, after a long period, the flare may
break and cause refrigerant gas leakage.
4. Do not touch outdoor unit air inlet and aluminium fin. It may cause injury.
5. Select an installation location which is easy for maintenance.
6. Pb free solder has a higher melting point than standard solder; typically the melting point is 50°F - 70°F (30°C - 40°C) higher. Please use a
high temperature solder iron. In case of the soldering iron with temperature control, please set it to 700 ± 20°F (370 ± 10°C). Pb free solder
will tend to splash when heated too high (about 1100°F / 600°C).
7. Power supply connection to the air conditioner. Connect the power supply cord of the air conditioner to the mains using one of the following
methods.
Power supply point shall be the place where there is ease for access for the power disconnection in case of emergency. In some countries,
permanent connection of this room air conditioner to the power supply is prohibited.
i. Power supply connection to the receptacle using a power plug. Use an approved 15/16A (3/4~1.75HP), 16A (2.0HP), 20A (2.5HP) or
25A (3.0HP) power plug with earth pin for the connection to the socket.
ii. Power supply connection to a circuit breaker for the permanent connection. Use an approved 16A (3/4~2.0HP), 20A (2.5HP) or 25A
(3.0HP) circuit breaker for the permanent connection. It must be a double pole switch with a minimum 3.0 mm contact gap.
8. Do not release refrigerant during piping work for installation, servicing, reinstallation and during repairing a refrigerant parts.
Take care of the liquid refrigerant, it may cause frostbite.
9. Installation or servicing work: It may need two people to carry out the installation or servicing work.
10. Do not install this appliance in a laundry room or other location where water may drip from the ceiling, etc.
11. Do not sit or step on the unit, you may fall down accidentally.
12. Do not touch the sharp aluminium fin, sharp parts may cause injury.
1. Cooling capacities are based on indoor temperature of 27°C Dry Bulb (80.6°F Dry Bulb), 19.0°C Wet Bulb (66.2°F Wet Bulb)
and outdoor air temperature of 35°C Dry Bulb (95°F Dry Bulb), 24°C Wet Bulb (75.2°F Wet Bulb)
2. Heating capacities are based on indoor temperature of 20°C Dry Bulb (68°F Dry Bulb) and outdoor air temperature of 7°C Dry
Bulb (44.6°F Dry Bulb), 6°C Wet Bulb (42.8°F Wet Bulb)
3. Heating low temperature capacity, Input Power and COP measured at 230 V, indoor temperature 20°C, outdoor 2/1°C
4. Heating extreme low temperature capacity, Input Power and COP measured at 230 V, indoor temperature 20°C, outdoor
-7/-8°C
5. Specifications are subjected to change without prior notice for further improvement.
1. Cooling capacities are based on indoor temperature of 27°C Dry Bulb (80.6°F Dry Bulb), 19.0°C Wet Bulb (66.2°F Wet Bulb)
and outdoor air temperature of 35°C Dry Bulb (95°F Dry Bulb), 24°C Wet Bulb (75.2°F Wet Bulb)
2. Heating capacities are based on indoor temperature of 20°C Dry Bulb (68°F Dry Bulb) and outdoor air temperature of 7°C Dry
Bulb (44.6°F Dry Bulb), 6°C Wet Bulb (42.8°F Wet Bulb)
3. Heating low temperature capacity, Input Power and COP measured at 230 V, indoor temperature 20°C, outdoor 2/1°C
4. Heating extreme low temperature capacity, Input Power and COP measured at 230 V, indoor temperature 20°C, outdoor
-7/-8°C
5. Specifications are subjected to change without prior notice for further improvement.
- Long piping up to 15 meters during single split connection only
• Easy to use remote control
• Quality Improvement
- Random auto restart after power failure for safety restart operation
- Gas leakage protection
- Prevent compressor reverse cycle
- Inner protector to protect Compressor
- Noise prevention during soft dry operation
• Operation Improvement
- 24-hour timer setting
• Serviceability Improvement
- Breakdown Self Diagnosis function
11
4Location of Controls and Components
4.1.Indoor Unit
4.2.Outdoor Unit
4.3.Remote Control
12
5Dimensions
5.1.Indoor Unit
13
5.2.Outdoor Unit
14
6Refrigeration Cycle Diagram
15
7Block Diagram
16
8Wiring Connection Diagram
8.1.Indoor Unit
17
8.2.Outdoor Unit
18
9Electronic Circuit Diagram
9.1.Indoor Unit
19
9.2.Outdoor Unit
20
10 Printed Circuit Board
10.1.Indoor Unit
10.1.1.Main Printed Circuit Board
21
10.1.2.Power Printed Circuit Board
10.1.3.Indicator Printed Circuit Board
22
10.2.Outdoor Unit
23
11 Installation Instruction
11.1.Select the Best Location
11.1.1.Indoor Unit
• Do not install the unit in excessive oil fume area such as
kitchen, workshop and etc.
• There should not be any heat source or steam near the unit.
• There should not be any obstacles blocking the air
circulation.
• A place where air circulation in the room is good.
• A place where drainage can be easily done.
• A place where noise prevention is taken into consideration.
• Do not install the unit near the door way.
• Ensure the spaces indicated by arrows from the wall, ceiling,
fence or other obstacles.
• Recommended installation height for indoor unit shall be at
least 2.5 m.
11.1.2.Outdoor Unit
• If an awning is built over the unit to prevent direct sunlight or
rain, be careful that heat radiation from the condenser is not
obstructed.
• There should not be any animal or plant which could be
affected by hot air discharged.
• Keep the spaces indicated by arrows from wall, ceiling,
fence or other obstacles.
• Do not place any obstacles which may cause a short circuit
of the discharged air.
• If piping length is over the [piping length for additional gas],
additional refrigerant should be added as shown in the table.
11.1.3.Indoor/Outdoor Unit Installation
Diagram
Piping
Gas
size
Li-
quid
1/4”5
Model
CE9*** 1.0HP 3/8”
CE12*** 1.5HP 1/2”5315207.5
Horse
Power
(HP)
Std.
Length
(m)
Max.
Ele-
vation
(m)
5315207.5
Min.
Piping
Length
(m)
Max.
Piping
Length
(m)
Additional
Refri-
gerant
(g/m)
Piping
Length
for
add.
gas
(m)
Example: For CE9***
If the unit is installed at 10 m distance, the quantity of additional
refrigerant should be 50 g .... (10-7.5) m x 20 g/m = 50 g
24
11.2.Indoor Unit
11.2.1.How to Fix Installation Plate
The mounting wall is strong and solid enough to prevent it from
the vibration.
ModelDimension
CE9***
CE12***
The centre of installation plate should be at more than at
right and left of the wall.
The distance from installation plate edge to ceiling should more
than .
From installation plate left edge to unit’s left side is .
From installation plate right edge to unit’s right is .
B : For left side piping, piping connection for liquid should be
about from this line.
: For left side piping, piping connection for gas should be
about from this line.
485 mm 82 mm 165 mm 158 mm 127 mm 85 mm
11.2.2.To Drill a Hole in the Wall and Install
a Sleeve of Piping
1. Insert the piping sleeve to the hole.
2. Fix the bushing to the sleeve.
3. Cut the sleeve until it extrudes about 15 mm from the
wall.
When the wall is hollow, please be sure to use the sleeve
for tube ass’y to prevent dangers caused by mice biting
the connecting cable.
4. Finish by sealing the sleeve with putty or caulking
compound at the final stage.
1. Mount the installation plate on the wall with 5 screws or
more (at least 5 screws).
(If mounting the unit on the concrete wall, consider using
anchor bolts.)
• Always mount the installation plate horizontally by
aligning the marking-off line with the thread and using a
level gauge.
2. Drill the piping plate hole with ø70 mm hole-core drill.
• Line according to the left and right side of the installation
plate. The meeting point of the extended line is the
center of the hole. Another method is by putting
measuring tape at position as shown in the diagram
above. The hole center is obtained by measuring the
distance namely 128 mm for left and right hole
respectively.
• Drill the piping hole at either the right or the left and the
hole should be slightly slanting to the outdoor side.
11.2.3.Indoor Unit Installation
25
1. For the right rear piping
2. For the right and right bottom piping
3. For the embedded piping
26
(This can be used for left rear piping and bottom piping also.)
11.2.4.Connect the Cable to the Indoor Unit
1. The inside and outside connecting cable can be
connected without removing the front grille.
2. Connecting cable between indoor unit and outdoor unit
shall be approved polychloroprene sheathed 4 x 1.5 mm
flexible cord, type designation 245 IEC 57 or heavier
cord.
• Secure the connecting cable onto the control board with
the holder (clamper).
This equipment must be properly earthed.
• Ensure the colour of wires of outdoor unit and the terminal Nos. are the same to the indoor’s respectively.
• Earth wire shall be Yellow/Green (Y/G) in colour and longer than other AC wires for safety reason.
2
CUTTING AND FLARING THE PIPING
1. Please cut using pipe cutter and then remove the burrs.
2. Remove the burrs by using reamer. If burrs is not removed, gas leakage may be caused.
Turn the piping end down to avoid the metal powder entering the pipe.
3. Please make flare after inserting the flare nut onto the copper pipes.
27
11.3.Outdoor Unit
11.3.1.Install the Outdoor Unit
• After selecting the best location, start installation according to Indoor/Outdoor Unit Installation Diagram.
1. Fix the unit on concrete or rigid frame firmly and horizontally by bolt nut (ø10 mm).
2. When installing at roof, please consider strong wind and earthquake. Please fasten the installation stand firmly with bolt or
nails.
ModelABCD
11.3.2.Connect the Piping
Connecting the Piping to Indoor
Please make flare after inserting flare nut (locate at joint portion
of tube assembly) onto the copper pipe.
(In case of using long piping)
Connect the piping
• Align the center of piping and sufficiently tighten the flare nut
with fingers.
• Further tighten the flare nut with torque wrench in specified
torque as stated in the table.
CE9***
CE12***
Do not over tighten, over tightening cause gas leakage.
Piping SizeTorque
1/4” (6.35 mm)[18 N•m (1.8 kgf.m)]
3/8” (9.52 mm)[42 N•m (4.3 kgf.m)]
1/2” (12.7 mm)[55 N•m (5.6 kgf.m)]
5/8” (15.88 mm)[65 N•m (6.6 kgf.m)]
3/4” (19.05 mm)[100 N•m (10.2 kgf.m)]
570 mm105 mm18.5 mm320 mm
Connecting the Piping to Outdoor
Decide piping length and then cut by using pipe cutter. Remove
burrs from cut edge. Make flare after inserting the flare nut
(located at valve) onto the copper pipe.
Align center of piping to valve and then tighten with torque
wrench to the specified torque as stated in the table.
11.3.3.Evacuation of the Equipment
WHEN INSTALLING AN AIR CONDITIONER, BE SURE TO EVACUATE THE AIR INSIDE THE INDOOR UNIT AND PIPES in the
following procedure.
1. Connect a charging hose with a push pin to the Low side of a charging set and the service port of the 3-way valve.
• Be sure to connect the end of the charging hose with the push pin to the service port.
2. Connect the center hose of the charging set to a vacuum pump.
3. Turn on the power switch of the vacuum pump and make sure that the needle in the gauge moves from 0 cmHg (0 MPa) to
-76 cmHg (-0.1 MPa). Then evacuate the air approximately ten minutes.
28
4. Close the Low side valve of the charging set and turn off the vacuum pump. Make sure that the needle in the gauge does not
move after approximately five minutes.
Note: BE SURE TO TAKE THIS PROCEDURE IN ORDER TO AVOID REFRIGERANT GAS LEAKAGE.
5. Disconnect the charging hose from the vacuum pump and from the service port of the 3-way valve.
6. Tighten the service port caps of the 3-way valve at a torque of 18 N
•m with a torque wrench.
7. Remove the valve caps of both of the 2-way valve and 3-way valve. Position both of the valves to “OPEN” using a hexagonal
wrench (4 mm).
8. Mount valve caps onto the 2-way valve and the 3-way valve.
• Be sure to check for gas leakage.
• If gauge needle does not move from 0 cmHg (0 MPa) to -76 cmHg (-0.1 MPa), in step above take the following measure:
- If the leak stops when the piping connections are tightened further, continue working from step .
- If the leak does not stop when the connections are retightened, repair the location of leak.
- Do not release refrigerant during piping work for installation and reinstallation.
- Take care of the liquid refrigerant, it may cause frostbite.
11.3.4.Connect the Cable to the Outdoor Unit
1. Remove the control board cover from the unit by
loosening the screw.
2. Cable connection to the power supply through Isolating
Devices (Disconnecting means).
• Connect approved type polychloroprene sheathed
power supply cord 3 x 1.5 mm
designation 245 IEC 57 or heavier cord to the terminal
board, and connect the others end of the cord to
Isolating Devices (Disconnecting means).
3. Connecting cable between indoor unit and outdoor unit
shall be approved polychloroprene sheathed 4 x 1.5 mm
flexible cord, type designation 245 IEC 57 or heavier
cord.
4. Connect the power supply cord and connecting cable
between indoor unit and outdoor unit according to the
diagram below.
2
(1.0 ~ 1.5HP) type
2
5. Secure the power supply cord and connecting cable onto the control board with the holder.
6. Attach the control board cover back to the original position with screw.
7. For wire stripping and connection requirement, refer to instruction of indoor unit.
This equipment must be properly earthed.
• Note: Isolating Devices (Disconnecting means) should have minimum 3.0 mm contact gap.
• Earth wire shall be Yellow/Green (Y/G) in colour and longer than other AC wires for safety reason.
11.3.5.Pipe Insulation
1. Please carry out insulation at pipe connection portion as mentioned in Indoor/Outdoor Unit Installation Diagram. Please wrap
the insulated piping end to prevent water from going inside the piping.
2. If drain hose or connecting piping is in the room (where dew may form), please increase the insulation by using POLY-E
FOAM with thickness 6mm or above.
29
12 Operation and Control
12.1.Basic Function
Inverter control, which equipped with a microcomputer in determining the most suitable operating mode as time passes,
automatically adjusts output power for maximum comfort always. In order to achieve the suitable operating mode, the
microcomputer maintains the set temperature by measuring the temperature of the environment and performing temperature
shifting. The compressor at outdoor unit is operating following the frequency instructed by the microcomputer at indoor unit that
judging the condition according to internal setting temperature and intake air temperature.
12.1.1.Internal Setting Temperature
Once the operation starts, remote control setting temperature will be taken as base value for temperature shifting processes. These
shifting processes are depending on the air conditioner settings and the operation environment. The final shifted value will be used
as internal setting temperature and it is updated continuously whenever the electrical power is supplied to the unit.
12.1.2.Cooling Operation
12.1.2.1.Thermostat control
• Compressor is OFF when Intake Air Temperature - Internal Setting Temperature < -1.5°C.
• Compressor is ON after waiting for 3 minutes, if the Intake Air Temperature - Internal Setting Temperature > Compressor OFF
point.
12.1.3.Soft Dry Operation
12.1.3.1.Thermostat control
• Compressor is OFF when Intake Air Temperature - Internal Setting Temperature < -2.0°C.
• Compressor is ON after waiting for 3 minutes, if the Intake Air Temperature - Internal Setting Temperature > Compressor OFF
point.
12.1.4.Heating Operation
12.1.4.1.Thermostat control
• Compressor is OFF when Intake Air Temperature - Internal Setting Temperature > +2.0°C.
• Compressor is ON after waiting for 3 minutes, if the Intake Air Temperature - Internal Setting Temperature < Compressor OFF
point.
30
12.1.5.Automatic Operation
• This mode can be set using remote control and the operation is decided by remote control setting temperature, remote control
operation mode, indoor intake air temperature and outdoor air temperature.
• During operation mode judgment, indoor fan motor (with speed of Lo-) and outdoor fan motor are running for 30 seconds to
detect the indoor intake and outdoor air temperature. The operation mode is decided based on below chart.
• Every 30 minutes, the indoor and outdoor temperature is judged. Based on remote control setting temperature, the value of T1
will increase up to 10°C, T2 will decrease by 3°C and T3 will decrease up to 8°C.
• The Auto Operation Mode shifting will take place whenever operation mode changed from Cool/Soft Dry to Heating or vice versa.
12.1.6.Fan Operation
• Fan Operation is used to circulate air in a room.
• During operation, indoor fan run continuously but outdoor fan and compressor stop.
• Temperature setting is not applicable.
12.2.Indoor Fan Motor Operation
A. Basic Rotation Speed (rpm)
i. Manual Fan Speed
[Cooling, Dry, Fan]
• Fan motor’s number of rotation is determined according to remote control setting.
Remote ControlOOOOO
TabHiMe+MeMe-Lo
[Heating]
• Fan motor’s number of rotation is determined according to remote control setting.
Remote ControlOOOOO
TabSHiMe+MeMe-Lo
ii. Auto Fan Speed
[Cooling, Dry]
• According to room temperature and setting temperature, indoor fan speed is determined automatically.
• The indoor fan will operate according to pattern below.
[Fan]
• Indoor fan speed is fixed at predetermined speed.
31
[Heating]
• According to indoor pipe temperature, automatic heating fan speed is determined as follows.
B. Feedback control
• Immediately after the fan motor started, feedback control is performed once every second.
• During fan motor on, if fan motor feedback 2550 rpm or < 50 rpm continue for 10 seconds, then fan motor error counter
increase, fan motor is then stop and restart. If the fan motor counter becomes 7 times, then H19 - fan motor error is detected.
Operation stops and cannot on back.
12.3.Outdoor Fan Motor Operation
Outdoor fan motor is operated with 15 fan speed number of rotations. It starts when compressor starts operation and it stops 30
seconds after compressor stops operation.
12.4.Airflow Direction
1. There are two types of airflow, vertical airflow (directed by horizontal vane) and horizontal airflow (directed by vertical vanes).
2. Control of airflow direction can be automatic (angles of direction is determined by operation mode, heat exchanger
temperature and intake air temperature) and manual (angles of direction can be adjusted using remote control).
12.4.1.Vertical Airflow
Operation ModeAirflow DirectionVane Angle (°)
12345
HeatingAuto with Heat Exchanger
Temperature
Manual2033455870
Cooling and FanAuto20 ~ 46
Manual2027334046
Soft DryAuto20 ~ 46
Manual2027334046
1. Automatic vertical airflow direction can be set using remote control; the vane swings up and down within the angles as stated
above. For heating mode operation, the angle of the vane depands on the indoor heat exchanger temperature as Figure 1
below. When the air conditioner is stopped using remote control, the vane will shift to close position.
2. Manual vertical airflow direction can be set using remote control; the angles of the vane are as stated above and the positions
of the vane are as Figure 2 below. When the air conditioner is stopped using remote control, the vane will shift to close
position.
A20
B58
C33
32
12.4.2.Horizontal Airflow
• The horizontal airflow direction louvers can be adjusted manually by hand.
12.5.Timer Control
12.5.1.ON Timer Control
• ON timer can be set using remote control, the unit with timer set will start operate earlier than the setting time. This is to provide
a comfortable environment when reaching the set ON time.
• 60 minutes before the set time, indoor (at fan speed of Lo-) and outdoor fan motor start operate for 30 seconds to determine the
indoor intake air temperature and outdoor air temperature in order to judge the operation starting time.
• From the above judgment, the decided operation will start operate earlier than the set time as shown below.
12.5.2.OFF Timer Control
OFF timer can be set using remote control, the unit with timer set will stop operate at set time.
12.6.Auto Restart Control
1. When the power supply is cut off during the operation of air conditioner, the compressor will re-operate within three to four
minutes (there are 10 patterns between 2 minutes 58 seconds and 3 minutes 52 seconds to be selected randomly) after
power supply resumes.
2. This type of control is not applicable during ON/OFF Timer setting.
12.7.Indication Panel
LEDPOWERTIMER
ColorGreenOrange
Light ONOperation ONTimer Setting ON
Light OFFOperation OFFTimer Setting OFF
Note:
• If POWER LED is blinking, the possible operation of the unit are Hot Start, during Deice operation, operation mode judgment, or
ON timer sampling.
• If Timer LED is blinking, there is an abnormality operation occurs.
33
13 Protection Control
13.1.Protection Control For All Operations
13.1.1.Restart Control (Time Delay Safety Control)
• The Compressor will not turn on within 3 minutes from the moment operation stops, although the unit is turned on again by
pressing OFF/ON button at remote control within this period.
• This control is not applicable if the power supply is cut off and on again.
• This phenomenon is to balance the pressure inside the refrigerant cycle.
13.1.2.30 Seconds Forced Operation
• Once the air conditioner is turned on, the compressor will not stop within 30 seconds in a normal operation although the intake air
temperature has reached the thermo-off temperature. However, force stop by pressing the OFF/ON button at the remote control
is permitted or the Auto OFF/ON button at indoor unit.
• The reason for the compressor to force operation for minimum 30 seconds is to allow the refrigerant oil run in a full cycle and
return back to the outdoor unit.
13.1.3.Total Running Current Control
1. When the outdoor unit total running current (AC) exceeds X value, the frequency instructed for compressor operation will be
decreased.
2. If the running current does not exceed X value for 5 seconds, the frequency instructed will be increased.
3. However, if total outdoor unit running current exceeds Y value, compressor will be stopped immediately for 3 minutes.
ModelCE9JKCE12JK
Operation ModeX (A)Y (A)X (A)Y (A)
Cooling/Soft Dry (A)4.9514.985.7614.98
Cooling/Soft Dry (B)4.4314.985.2414.98
Cooling/Soft Dry (C)4.9514.985.7614.98
Heating6.214.988.114.98
4. The first 30 minutes of cooling operation, (A) will be applied.
13.1.4.IPM (Power transistor) Prevention Control
A. Overheating Prevention Control
1. When the IPM temperature rises to 100°C, compressor operation will stop immediately.
2. Compressor operation restarts after 3 minutes the temperature decreases to 95°C.
3. If this condition repeats continuously 4 times within 20 minutes, timer LED will be blinking (“F96” is indicated).
B. DC Peak Current Control
1. When electric current to IPM exceeds set value of 20.2 A, the compressor will stop operate. Then, operation will restart
after 3 minutes.
2. If the set value is exceeded again more than 30 seconds after the compressor starts, the operation will restart after 1
minute.
3. If the set value exceeded again within 30 seconds after the compressor starts, the operation will restart after 2 minutes. If
this condition repeats continuously for 7 times, all indoor and outdoor relays will be cut off, timer LED will be blinking (“F99”
is indicated).
34
13.1.5.Compressor Overheating Prevention Control
• Instructed frequency for compressor operation will be regulated by compressor discharge temperature. The changes of
frequency are as below.
• If compressor discharge temperature exceeds 112°C, compressor will be stopped, occurs 4 times per 20 minutes, timer LED will
be blinking. (“F97” is indicated.)
13.1.6.Low Pressure Prevention Control (Gas Leakage Detection)
a. Control start conditions
• For 5 minutes, the compressor continuously operates and outdoor total current is between 0.6A and 1.15A.
• During Cooling and Soft Dry operations:
Indoor suction temperature - indoor piping temperature is below 4°C.
• During Heating operations :
Indoor piping temperature - indoor suction is under 5°C.
b. Control contents
• Compressor stops (and restart after 3 minutes).
• If the conditions above happen 2 times within 20 minutes, the unit will:
- Stop operation
- Timer LED blinks and “F91” indicated.
13.1.7.Low Frequency Protection Control 1
• When the compressor operate at frequency lower than 25 Hz continued for 240 minutes, the operation frequency will be
changed to 24 Hz for 2 minutes.
13.1.8.Low Frequency Protection Control 2
• When all the below conditions comply, the compressor frequency will change to lower frequency.
Temperature, T, for:Cooling/Soft DryHeating
Indoor intake air (°C)
Outdoor air (°C)
Indoor heat exchanger (°C)T < 30
T < 14 or T 30T < 14 or T 28
T < 13 or T 38T < 4 or T 24
T 0
35
13.2.Protection Control For Cooling & Soft Dry Operation
13.2.1.Outdoor Air Temperature Control
• The compressor operating frequency is regulated in accordance to the outdoor air temperature as shown in the diagram below.
• This control will begin 1 minute after the compressor starts.
• Compressor frequency will adjust base on outdoor air temperature.
13.2.2.Cooling Overload Control
• Detects the Outdoor pipe temperature and carry out below restriction/limitation (Limit the compressor Operation frequency)
• The compressor stop if outdoor pipe temperature exceeds 63°C.
• If the compressor stops 4 times in 20 minutes, Timer LED blinking (F95 indicated: outdoor high pressure rise protection)
13.2.3.Freeze Prevention Control 1
1. When indoor heat exchanger temperature is lower than 0°C continuously for 6 minutes, compressor will stop operating.
2. Compressor will resume its operation 3 minutes after the indoor heat exchanger is higher than 5°C.
3. At the same time, indoor fan speed will be higher than during its normal operation.
4. If indoor heat exchanger temperature is higher than 5°C for 5 minutes, the fan speed will return to its normal operation.
13.2.4.Freeze Prevention Control 2
1. Control start conditions
• During Cooling operation and soft dry operation
- During thermo OFF condition, indoor intake temperature is less than 10°C or
- Compressor stops for freeze prevention control
• Either one of the conditions above occurs 5 times in 60 minutes.
2. Control contents
• Operation stops
• Timer LED blinks and “H99” indicated
13.2.5.Dew Prevention Control 1
• To prevent dew formation at indoor unit discharge area.
• This control will be activated if:
- Outdoor air temperature and Indoor pipe temperature judgment by microcontroller is fulfilled.
- When Cooling or Dry mode is operated more than 20 minutes or more.
• This control stopped if:
- Compressor stopped.
- Remote control setting changed (fan speed / temperature).
- Outdoor air temperature and indoor intake temperature changed.
• Fan speed, angle of louver (vertical airflow angle) will be adjusted accordingly in this control.
- Fan speed will be increased slowly if the unit is in quiet mode but no change in normal cooling mode.
36
13.2.6.Dew Prevention Control 2
• To prevent dew formation at indoor unit discharge area.
• This control starts if all conditions continue for 20 minutes:
- Operated with Cooling or Soft Dry Mode.
- Indoor intake temperature is between 25°C and 29°C.
- Outdoor air temperature is less than 30°C.
• This control stopped if:
- When receive air swing change signal from Remote Control.
• The horizontal louver will be fixed at 26° (regardless of Auto or Manual Airflow Direction Setting).
13.3.Protection Control For Heating Operation
13.3.1.Intake Air Temperature Control
Compressor will operate at limited freq., if indoor intake air temperature is 30°C or above.
13.3.2.Outdoor Air Temperature Control
• The Max current value is regulated when the outdoor air temperature rise above 14°C in order to avoid compressor overloading.
13.3.3.Overload Protection Control
• The compressor operating frequency is regulated in accordance to indoor heat exchanger temperature as shown below.
• If the heat exchanger temperature exceeds 60°C, compressor will stop.
13.3.4.Low Temperature Compressor Oil Return Control
• In heating operation, if the outdoor temperature falls below -10°C when compressor starts, the compressor frequency will be
regulated up to 600 seconds.
13.3.5.Cold Draught Prevention Control
• When indoor pipe temperature is low, cold draught operation starts where indoor fan speed will be reduced.
13.3.6.Deice Operation
• When outdoor pipe temperature and outdoor air temperature is low, deice operation start where indoor fan motor and outdoor fan
motor stop and operation LED blinks.
37
14 Servicing Mode
14.1.Auto OFF/ON Button
1. AUTO OPERATION MODE
The Auto operation will be activated immediately once the Auto OFF/ON button is pressed. This operation can be used to
operate air conditioner with limited function if remote control is misplaced or malfunction.
2. TEST RUN OPERATION (FOR PUMP DOWN/SERVICING PURPOSE)
The Test Run operation will be activated if the Auto OFF/ON button is pressed continuously for more than 5 seconds. A “beep”
sound will heard at the fifth seconds, in order to identify the starting of Test Run operation (Forced cooling operation). Within 5
minutes after Forced cooling operation start, the Auto OFF/ON button is pressed for more than 5 seconds. A 2 “beep” sounds
will heard at the fifth seconds, in order to identify the starting of Forced heating operation.
The Auto OFF/ON button may be used together with remote control to set / change the advance setting of air conditioner
operation.
3. REMOTE CONTROL NUMBER SWITCH MODE
The Remote Control Number Switch Mode will be activated if the Auto OFF/ON button is pressed continuously for more than
11 seconds (3 “beep” sounds will occur at 11th seconds to identify the Remote Control Number Switch Mode is in standby
condition) and press “AC RESET” button and then press any button at remote control to transmit and store the desired
transmission code to the EEPROM.
There are 4 types of remote control transmission code could be selected and stored in EEPROM of indoor unit. The indoor
unit will only operate when received signal with same transmission code from remote control. This could prevent signal
interference when there are 2 or more indoor units installed nearby together.
To change remote control transmission code, short or open jumpers at the remote control printed circuit board.
Remote Control Printed Circuit Board
Jumper A (J-A)Jumper B (J-B)Remote Control No.
ShortOpenA (Default)
OpenOpenB
ShortShortC
OpenShortD
• During Remote Control Number Switch Mode, press any button at remote control to transmit and store the transmission
code to the EEPROM.
38
4. REMOTE CONTROL RECEIVING SOUND OFF/ON MODE
The Remote Control Receiving Sound OFF/ON Mode will be activated if the Auto OFF/ON button is pressed continuously for
more than 16 seconds (4 “beep” sounds will occur at 16th seconds to identify the Remote Control Receiving Sound Off/On
Mode is in standby condition) and press “AC Reset” button at remote control.
Press “Auto OFF/ON button” to toggle remote control receiving sound.
- Short “beep”: Turn OFF remote control receiving sound.
- Long “beep”: Turn ON remote control receiving sound.
After Auto OFF/ON Button is pressed, the 20 seconds counter for Remote Control Receiving Sound OFF/ON Mode is
restarted.
14.2.Remote Control Button
14.2.1.SET BUTTON
• To check remote control transmission code and store the transmission code to EEPROM
- Press “SET” button for more than 10 seconds by using pointer.
- Press “TIMER SET” button until a “beep” sound is heard as confirmation of transmission code changed.
14.2.2.CLOCK BUTTON
• To change the remote control’s time format
- Press for more than 5 seconds.
14.2.3.RESET (RC)
• To clear and restore the remote control setting to factory default
- Press once to clear the memory.
14.2.4.RESET (AC)
• To restore the unit’s setting to factory default
- Press once to restore the unit’s setting.
14.2.5.TIMER
• To change indoor unit indicator’s LED intensity
- Press continuously for 5 seconds.
14.2.6.TIMER
• To change remote control display from Degree Celsius (°C) to Degree Fahrenheit (°F).
- Press continuously for 10 seconds.
39
15 Troubleshooting Guide
15.1.Refrigeration Cycle System
In order to diagnose malfunctions, make sure that there are no
electrical problems before inspecting the refrigeration cycle.
Such problems include insufficient insulation, problem with the
power source, malfunction of a compressor and a fan.
The normal outlet air temperature and pressure of the
refrigeration cycle depends on various conditions, the standard
values for them are shown in the table on the right.
40
15.1.1.Relationship between the condition of the air conditioner and pressure and electric
current
Cooling ModeHeating Mode
Condition of the air
conditioner
Insufficient refrigerant
(gas leakage)
Clogged capillary tube
or Strainer
Short circuit in the
indoor unit
Heat radiation deficiency
of the outdoor unit
Inefficient compression
Low PressureHigh Pressure
Electric current
during operating
Low PressureHigh Pressure
Electric current
during operating
• Carry out the measurements of pressure, electric current, and temperature fifteen minutes after an operation is started.
41
15.2.Breakdown Self Diagnosis Function
15.2.1.Self Diagnosis Function (Three Digits Alphanumeric Code)
• Once abnormality has occurred during operation, the unit
will stop its operation, and Timer LED blinks.
• Although Timer LED goes off when power supply is turned
off, if the unit is operated under a breakdown condition, the
LED will light up again.
• In operation after breakdown repair, the Timer LED will no
more blink. The last error code (abnormality) will be stored in
IC memory.
• To make a diagnosis
1. Timer LED start to blink and the unit automatically stops
the operation.
2. Press the CHECK button on the remote controller
continuously for 5 seconds.
3. “- -” will be displayed on the remote controller display.
Note: Display only for “- -”. (No transmitting signal, no
receiving sound and no Power LED blinking.)
4. Press the “TIMER” or button on the remote
controller. The code “H00” (no abnormality) will be
displayed and signal will be transmitted to the main unit.
5. Every press of the button (up or down) will increase
abnormality numbers and transmit abnormality code
signal to the main unit.
6. When the latest abnormality code on the main unit and
code transmitted from the remote controller are matched,
power LED will light up for 30 seconds and a beep sound
(continuously for 4 seconds) will be heard. If no codes are
matched, power LED will light up for 0.5 seconds and no
sound will be heard.
7. The breakdown diagnosis mode will be canceled unless
pressing the CHECK button continuously for 5 seconds or
operating the unit for 30 seconds.
8. The LED will be off if the unit is turned off or the RESET
button on the main unit is pressed.
• To display memorized error (Protective operation)
status
1. Turn power on.
2. Press the CHECK button on the remote controller
continuously for 5 seconds.
3. “- -” will be displayed on the remote controller display.
Note: Display only for “- -”. (No transmitting signal, no
receiving sound and no Power LED blinking.)
4. Press the “TIMER” or button on the remote
controller. The code “H00” (no abnormality) will be
displayed and signal will be transmitted to the main unit.
The power LED lights up. If no abnormality is stored in the
memory, three beeps sound will be heard.
5. Every press of the button (up or down) will increase
abnormality numbers and transmit abnormality code
signal to the main unit.
6. When the latest abnormality code on the main unit and
code transmitted from the remote controller are matched,
power LED will light up for 30 seconds and a beep sound
(continuously for 4 seconds) will be heard. If no codes are
matched, power LED will light up for 0.5 seconds and no
sound will be heard.
7. The breakdown diagnosis mode will be canceled unless
pressing the CHECK button continuously for 5 seconds or
operating the unit for 30 seconds.
8. The same diagnosis can be repeated by turning power on
again.
• To clear memorized error (Protective operation) status
after repair:
1. Turn power on (in standby condition).
2. Press the AUTO button for 5 seconds (A beep receiving
sound) on the main unit to operate the unit at Forced
Cooling Operation modes.
3. Press the CHECK button on the remote controller for
about 1 second with a pointed object to transmit signal to
main unit. A beep sound is heard from main unit and the
data is cleared.
• Temporary Operation (Depending on breakdown status)
1. Press the AUTO button (A beep receiving sound) on the
main unit to operate the unit. (Remote control will become
possible.)
2. The unit can temporarily be used until repaired.
42
15.3.Error Codes Table
Diagnosis
display
H00No memory of failure—Normal operation——
H11Indoor/outdoor
H14Indoor intake air
H15Compressor
H16Outdoor current
H19Indoor fan motor
H23Indoor heat exchanger
H27Outdoor air temperature
H28Outdoor heat exchanger
H30Outdoor discharge pipe
H33Indoor / outdoor
H38Indoor/Outdoor
H97Outdoor fan motor
H98Indoor high pressure
H99Indoor operating unit
F114-way valve switching
F90Power factor correction
F91Refrigeration cycle
F93Compressor abnormal
F95Outdoor cooling high
F96Power transistor module
Abnormality /
Protection control
abnormal
communication
temperature sensor
abnormality
temperature sensor
abnormality
transformer (CT)
abnormality
merchanism lock
temperature sensor
abnormality
sensor abnormality
temperature sensor 1
abnormality
temperature sensor
abnormality
misconnection
abnormality
mismatch (brand code)
mechanism lock
protection
freeze protection
abnormality
(PFC) circuit protection
abnormality
revolution
pressure protection
overheating protection
Abnormality
Judgement
After operation for
1 minute
Continuous for 5s—Indoor intake air temperature
Continuous for 5s—Compressor temperature
——Current transformer faulty or
Continuous
happen for 7 times
Continuous for 5s—Indoor heat exchanger
Continuous for 5s—Outdoor air temperature
Continuous for 5s—Outdoor heat exchanger
Continuous for 5s—Outdoor discharge pipe
——Indoor and outdoor rated
——Brand code not match
2 times happen
within 30 minutes
——Indoor high pressure
——Indoor freeze protection
4 times happen
within 30 minutes
4 times happen
within 10 minutes
2 times happen
within 20 minutes
4 times happen
within 20 minutes
4 times happen
within 20 minutes
4 times happen
within 30 minutes
Protection
operation
Indoor fan only
operation can
start by entering
into force cooling
operation
—Indoor fan motor lock or
—Outdoor fan motor lock or
—4-way valve switching
—Power factor correction
—Refrigeration cycle abnormal• Insufficient refrigerant or valve
—Compressor abnormal
—Cooling high pressure
—Power transistor module
Indoor/outdoor
communication not establish
sensor open or short circuit
sensor open or short circuit
compressor faulty
feedback abnormal
temperature sensor open or
short circuit
sensor open or short circuit
temperature sensor 1 open
or short circuit
temperature sensor open or
short circuit
voltage different
feedback abnormal
protection (Heating)
(Cooling)
abnormal
circuit abnormal
revolution
protection
overheat
ProblemCheck location
• Indoor/outdoor wire terminal
• Indoor/outdoor PCB
• Indoor/outdoor connection wire
• Indoor intake air temperature
sensor lead wire and connector
• Compressor temperature sensor
lead wire and connector
• Outdoor PCB faulty or
compressor faulty
• Fan motor lead wire and
connector
• Fan motor lock or block
• Indoor heat exchanger
temperature sensor lead wire and
connector
• Outdoor air temperature sensor
lead wire and connector
• Outdoor heat exchanger
temperature sensor 1 lead wire
and connector
• Outdoor discharge pipe
temperature sensor lead wire and
connector
• Indoor and outdoor units check
• Check indoor unit and outdoor
unit.
• Outdoor fan motor lead wire and
connector
• Fan motor lock or block
• Check indoor heat exchanger
• Air filter dirty
• Air circulation short circuit
• Check indoor heat exchanger
• Air filter dirty
• Air circulation short circuit
•4-way valve
• Lead wire and connector.
• Outdoor PCB faulty
close
• Power transistor module faulty or
compressor lock
• Check refrigeration system
• Outdoor air circuit
• PCB faulty
• Outdoor air circuit (fan motor)
43
Diagnosis
display
Abnormality /
Protection control
Abnormality
Judgement
Protection
operation
ProblemCheck location
F97Compressor
overheating protection
F98Total running current
protection
F99Outdoor direct current
(DC) peak detection
3 times happen
within 30 minutes
3 times happen
within 20 minutes
Continuous
happen for 7 times
—Compressor overheat• Insufficient refrigerant
—Total current protection• Check refrigeration system
—Power transistor module
current protection
• Power source or compressor lock
• Power transistor module faulty or
compressor lock
During startup and operation of cooling and heating, the data received from outdoor unit in indoor unit signal transmission is
checked whether it is normal.
Malfunction Caused
• Faulty indoor unit PCB.
• Faulty outdoor unit PCB.
• Indoor unit-outdoor unit signal transmission error due to wrong wiring.
• Indoor unit-outdoor unit signal transmission error due to breaking of wire in the connection wires between the indoor and outdoor
units.
• Indoor unit-outdoor unit signal transmission error due to disturbed power supply waveform.
Troubleshooting
45
15.4.2.H14 (Indoor Intake Air Temperature Sensor Abnormality)
Malfunction Decision Conditions
During startup and operation of cooling and heating, the temperatures detected by the indoor intake air temperature sensor are
used to determine sensor errors.
Malfunction Caused
• Faulty connector connection.
• Faulty sensor.
• Faulty PCB.
Troubleshooting
46
15.4.3.H15 (Compressor Temperature Sensor Abnormality)
Malfunction Decision Conditions
During startup and operation of cooling and heating, the temperatures detected by the outdoor compressor temperature sensor
are used to determine sensor errors.
Malfunction Caused
• Faulty connector connection.
• Faulty sensor.
•Faulty PCB.
Troubleshooting
47
15.4.4.H16 (Outdoor Current Transformer Open Circuit)
Malfunction Decision Conditions
A current transformer (CT) is detected by checking the compressor running frequency ( rated frequency) and CT detected
input current (less than 0.65A) for continuously 20 seconds.
Malfunction Caused
• CT defective
• Outdoor PCB defective
• Compressor defective (low compression)
Troubleshooting
48
15.4.5.H19 (Indoor Fan Motor - DC Motor Mechanism Locked)
Malfunction Decision Conditions
The rotation speed detected by the Hall IC during fan motor operation is used to determine abnormal fan motor (feedback of
rotation > 2550rpm or < 50rpm)
Malfunction Caused
• Operation stops due to short circuit inside the fan motor winding.
• Operation stops due to breaking of wire inside the fan motor.
• Operation stops due to breaking of fan motor lead wires.
• Operation stops due to Hall IC malfunction.
• Operation error due to faulty indoor unit PCB.
Troubleshooting
49
15.4.6.H23 (Indoor Pipe Temperature Sensor Abnormality)
Malfunction Decision Conditions
During startup and operation of cooling and heating, the temperatures detected by the indoor heat exchanger temperature
sensor are used to determine sensor errors.
Malfunction Caused
• Faulty connector connection.
• Faulty sensor.
• Faulty PCB.
Troubleshooting
50
15.4.7.H27 (Outdoor Air Temperature Sensor Abnormality)
Malfunction Decision Conditions
During startup and operation of cooling and heating, the temperatures detected by the outdoor air temperature sensor are used
to determine sensor errors.
Malfunction Caused
• Faulty connector connection.
• Faulty sensor.
•Faulty PCB.
Troubleshooting
51
15.4.8.H28 (Outdoor Pipe Temperature Sensor Abnormality)
Malfunction Decision Conditions
During startup and operation of cooling and heating, the temperatures detected by the outdoor pipe temperature sensor are
used to determine sensor errors.
Malfunction Caused
• Faulty connector connection.
• Faulty sensor.
• Faulty PCB.
Troubleshooting
52
15.4.9.H30 (Compressor Discharge Temperature Sensor Abnormality)
Malfunction Decision Conditions
During startup and operation of cooling and heating, the temperatures detected by the outdoor discharge pipe temperature sensor are used to determine sensor errors.
Malfunction Caused
• Faulty connector connection.
• Faulty sensor.
•Faulty PCB.
Troubleshooting
53
15.4.10. H33 (Unspecified Voltage between Indoor and Outdoor)
Malfunction Decision Conditions
The supply power is detected for its requirement by the indoor/outdoor transmission.
Malfunction Caused
• Wrong models interconnected.
• Wrong indoor unit and outdoor unit PCBs used.
• Indoor unit or outdoor unit PCB defective.
Troubleshooting
54
15.4.11. H97 (Outdoor Fan Motor - DC Motor Mechanism Locked)
Malfunction Decision Conditions
The rotation speed detected by the Hall IC during fan motor operation is used to determine abnormal fan motor.
Malfunction Caused
• Operation stops due to short circuit inside the fan motor winding.
• Operation stops due to breaking of wire inside the fan motor.
• Operation stops due to breaking of fan motor lead wires.
• Operation stops due to Hall IC malfunction.
• Operation error due to faulty outdoor unit PCB.
Troubleshooting
55
15.4.12. H98 (Indoor High Pressure Protection)
Error Code will not display (no Timer LED blinking) but store in EEPROM
Malfunction Decision Conditions
During heating operation, the temperature detected by the indoor pipe temperature sensor is above 60°C.
Malfunction Caused
• Clogged air filter of the indoor unit
• Dust accumulation on the indoor unit heat exchanger
• Air short circuit
• Detection error due to faulty indoor pipe temperature sensor
• Detection error due to faulty indoor unit PCB
Troubleshooting
56
15.4.13. H99 (Indoor Freeze Prevention Protection: Cooling or Soft Dry)
Error code will not display (no TIMER LED blinking) but store in EEPROM
Malfunction Decision Conditions
Freeze prevention control takes place (when indoor pipe temperature is lower than 2°C)
Malfunction Caused
• Clogged air filter of the indoor unit
• Dust accumulation on the indoor unit heat exchanger
• Air short circuit
• Detection error due to faulty indoor pipe temperature sensor
• Detection error due to faulty indoor unit PCB
Troubleshooting
57
15.4.14. F11 (4-way valve Abnormality)
Malfunction Decision Conditions
• When heating operation, when indoor pipe temperature is below 10°C
• When cooling operation, when indoor pipe temperature is above 45°C
Malfunction Caused
• Connector in poor contact
• Faulty sensor
• Faulty outdoor unit PCB
• 4-way valve defective
Troubleshooting
58
15.4.15. F90 (Power Factor Correction Protection)
Malfunction Decision Conditions
During startup and operation of cooling and heating, when Power Factor Correction (PFC) protection circuitry at the outdoor unit
main PCB senses abnormal high DC voltage level.
Malfunction Caused
• DC voltage peak due to power supply surge.
• DC voltage peak due to compressor windings not uniform.
• Faulty outdoor PCB.
Troubleshooting
59
15.4.16. F91 (Refrigeration Cycle Abnormality)
Malfunction Decision Conditions
• During cooling, compressor frequency = Fcmax.
• During heating, compressor frequency > Fhrated.
• During cooling and heating operation, running current: 0.65A < I < 1.65A.
• During cooling, indoor intake - indoor pipe < 4°C
• During heating, indoor pipe - indoor intake < 5°C
Multi Models Only
- Gas shortage detection 1: A gas shortage is detected by checking the CT-detected input current value and the compressor
running frequency. During startup and operating of cooling and heating, input current < 8.78/256 (A/Hz) x compressor
running frequency + 0.25.
- Gas shortage detection 2: A gas shortage is detected by checking the difference between indoor pipe temperature and
indoor intake air temperature during cooling and heating.
Malfunction Caused
• Refrigerant shortage (refrigerant leakage)
• Poor compression performance of compressor.
• 2/3 way valve closed.
• Detection error due to faulty indoor intake air or indoor pipe temperature sensors.
Troubleshooting
60
15.4.17. F93 (Compressor Rotation Failure)
Malfunction Decision Conditions
A compressor rotation failure is detected by checking the compressor running condition through the position detection circuit.
Malfunction Caused
• Compressor terminal disconnect
• Outdoor PCB malfunction
Troubleshooting
61
15.4.18. F95 (Cooling High Pressure Abnormality)
Malfunction Decision Conditions
During operation of cooling, when outdoor unit heat exchanger high temperature data (61°C) is detected by the outdoor pipe
temperature sensor.
Malfunction Caused
• Outdoor pipe temperature rise due to short circuit of hot discharge air flow.
• Outdoor pipe temperature rise due to defective of outdoor fan motor.
• Outdoor pipe temperature rise due to defective outdoor pipe temperature sensor.
• Outdoor pipe temperature rise due to defective outdoor unit PCB.
Troubleshooting
62
15.4.19. F96 (IPM Overheating)
Malfunction Decision Conditions
During operating of cooling and heating, when IPM temperature data (100°C) is detected by the IPM temperature sensor.
Multi Models Only
• Compressor Overheating: During operation of cooling and heating, when the compressor OL is activated.
• Heat Sink Overheating: During operation of cooling and heating, when heat sink temperature data (90°C) is detected by the
heat sink temperature sensor.
Malfunction Caused
• IPM overheats due to short circuit of hot discharge air flow.
• IPM overheats due to defective of outdoor fan motor.
• IPM overheats due to defective of internal circuitry of IPM.
• IPM overheats due to defective IPM temperature sensor.
Multi Models Only
- Compressor OL connector poor contact.
- Compressor OL faulty.
Troubleshooting
63
15.4.20. F97 (Compressor Overheating)
Malfunction Decision Conditions
During operation of cooling and heating, when compressor tank temperature data (112°C) is detected by the compressor tank
temperature sensor.
Malfunction Caused
• Refrigerant shortage (refrigerant leakage).
• 2/3 way valve closed.
• Detection error due to faulty compressor tank temperature sensor.
Troubleshooting
64
15.4.21. F98 (Input Over Current Detection)
Malfunction Decision Conditions
During operation of cooling and heating, when an input over-current (14.98A) is detected by checking the input current value
being detected by current transformer (CT) with the compressor running.
Malfunction Caused
• Over-current due to compressor failure.
• Over-current due to defective outdoor unit PCB.
• Over-current due to defective inverter main circuit electrolytic capacitor.
• Over-current due to excessive refrigerant.
Troubleshooting
14.98A?
65
15.4.22. F99 (Output Over Current Detection)
Malfunction Decision Conditions
During operation of cooling and heating, when an output over-current (20.2A) is detected by checking the current that flows in
the inverter DC peak sensing circuitry.
Malfunction Caused
• DC peak due to compressor failure.
• DC peak due to defective power transistor(s).
• DC peak due to defective outdoor unit PCB.
Troubleshooting
20.2A?
• Checking the power transistor
• Never touch any live parts for at least 10 minutes after turning off the circuit breaker.
• If unavoidable necessary to touch a live part, make sure the power transistor’s supply voltage is below 50V using the tester.
W, make measurement at the Faston terminal on the board of the relay connector.
k lareveSecnatsiser lamroN to several M
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66
16 Disassembly and Assembly Instructions
High voltages are generated in the electrical parts area by the capacitor. Ensure that the capacitor has discharged sufficiently before proceeding
with repair work. Failure to heed this caution may result in electric shocks.
16.1.Indoor Electronic Controllers, Cross Flow Fan and Indoor Fan Motor
Removal Procedures
16.1.1.To remove front grille
16.1.2.To remove power electronic controller
67
16.1.3.To remove discharge grille
68
16.1.4.To remove control board
16.1.5.To remove cross flow fan and indoor fan motor