Panasonic CS-MPS9SKH Service Manual
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Panasonic CS-MPS9SKH Service Manual

Panasonic CS-MPS9SKH Service Manual

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Please file and use this manual together with the service manual for Model No. CU-2S18SKH
CU-4S27SBH CU-4S34SBH, Order No. PAPAMY1611007CE.
This service information is designed for experienced repair technicians only and is not designed for use by the general public.
It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product.
Products powered by electricity should be serviced or repaired only by experienced professional technicians. Any attempt to service or
repair the products dealt with in this service information by anyone else could result in serious injury or death.
There are special components used in this equipment which are important for safety. These parts are marked by
Diagrams, Circuit Board Diagrams, Exploded Views and Replacement Parts List. It is essential that these critical parts should be replaced
with manufacturer's specified parts to prevent shock, fire or other hazards. Do not modify the original design without permission of
manufacturer.
In order to avoid frostbite, be assured of no refrigerant leakage during the installation or repairing of refrigerant circuit.
AUTO
FAN
COOL
SPEED
AIR
DRY
SWING
OFF
ON
TIMER
TIMER
OFF/ON
OFF/ON
MOD E
FAN SPEED
T E M P
T
M P
AIR SWING
TIMER
TIMER
ON
ON
SET
SET
1
1
2
3
3
O FF
O FF
CA NC EL
CA NC EL
AC
RC
SET CHECK
CHECK
CLOCK
RESET
WARNING
IMPORTANT SAFETY NOTICE
PRECAUTION OF LOW TEMPERATURE
Order No: PAPAMY1611008CE
Indoor Unit
CS-MPS9SKH
CS-MPS12SKH
CS-MPS15SKH
CS-MPS18SKH
CS-MPS24SKH
CS-MPS28SKH
Destination
Brunei
Cambodia
Indonesia
Myanmar
Thailand
Vietnam
CU-3S27SBH
CU-3S28SBH
in the Schematic
!
© Panasonic Corporation 2016

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Summary of Contents for Panasonic CS-MPS9SKH

  • Page 1 Do not modify the original design without permission of manufacturer. PRECAUTION OF LOW TEMPERATURE In order to avoid frostbite, be assured of no refrigerant leakage during the installation or repairing of refrigerant circuit. © Panasonic Corporation 2016...

  • Page 2: Table Of Contents

    Breakdown Self Diagnosis Function ... 45 13.3 Error Code Table ........46 13.4 Troubleshooting Flowchart ......48 14. Disassembly and Assembly Instructions ..74 14.1 CS-MPS9SKH CS-MPS12SKH CS-MPS15SKH .......... 74 14.2 CS-MPS18SKH CS-MPS24SKH CS-MPS28SKH .......... 78 15. Exploded View and Replacement Parts List ..............81 15.1...

  • Page 3: Safety Precautions

    1. Safety 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. ...
  • Page 4 WARNING 20. During pump down operation, stop the compressor before remove the refrigerant 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.

  • Page 5: Specification

    2. Specification Model Indoor/Outdoor CS-MPS9SKH / CU-2S18SKH CS-MPS12SKH / CU-2S18SKH Performance Test Condition Phase, Hz Single, 50 Single, 50 Power Supply Min. Mid. Max. Min. Mid. Max. 1.10 2.80 3.50 1.10 3.20 4.00 Capacity BTU/h 3750 9550 11900 3750 10900...
  • Page 6 Model Indoor/Outdoor CS-MPS9SKH / CU-3S27SBH CS-MPS12SKH / CU-3S27SBH Performance Test Condition Phase, Hz Single, 50 Single, 50 Power Supply Min. Mid. Max. Min. Mid. Max. 1.70 2.80 3.40 1.70 3.20 4.00 Capacity BTU/h 5800 9550 11600 5800 10900 13600 kJ/h...
  • Page 7 Model Indoor/Outdoor CS-MPS15SKH / CU-3S27SBH CS-MPS18SKH / CU-3S27SBH Performance Test Condition Phase, Hz Single, 50 Single, 50 Power Supply Min. Mid. Max. Min. Mid. Max. 1.70 4.00 4.80 1.90 5.00 5.80 Capacity BTU/h 5800 13600 16400 6480 17100 19800 kJ/h 6120 14400 17280...
  • Page 8 Model Indoor/Outdoor CS-MPS9SKH / CU-3S28SBH CS-MPS12SKH / CU-3S28SBH Performance Test Condition Phase, Hz Single, 50 Single, 50 Power Supply Min. Mid. Max. Min. Mid. Max. 1.70 2.80 3.40 1.70 3.20 4.00 Capacity BTU/h 5800 9550 11600 5800 10900 13600 kJ/h...
  • Page 9 Model Indoor/Outdoor CS-MPS15SKH / CU-3S28SBH CS-MPS18SKH / CU-3S28SBH Performance Test Condition Phase, Hz Single, 50 Single, 50 Power Supply Min. Mid. Max. Min. Mid. Max. 1.70 4.00 4.80 1.90 5.00 5.80 Capacity BTU/h 5800 13600 16400 6480 17100 19800 kJ/h 6120 14400 17280...
  • Page 10 Model Indoor/Outdoor CS-MPS24SKH / CU-3S28SBH Performance Test Condition Phase, Hz Single, 50 Power Supply Min. Mid. Max. 1.90 6.00 6.20 Capacity BTU/h 6480 20500 21100 kJ/h 6840 21600 22320 Running Current 9.30 8.60 Input Power 1.92k 2.07k 4.75 3.13 3.00 kJ/hW 17.10 11.25...
  • Page 11 Model Indoor/Outdoor CS-MPS9SKH / CU-4S27SBH CS-MPS12SKH / CU-4S27SBH Performance Test Condition Phase, Hz Single, 50 Single, 50 Power Supply Min. Mid. Max. Min. Mid. Max. 1.70 2.80 3.40 1.70 3.20 4.00 Capacity BTU/h 5800 9550 11600 5800 10900 13600 kJ/h...
  • Page 12 Model Indoor/Outdoor CS-MPS15SKH / CU-4S27SBH CS-MPS18SKH / CU-4S27SBH Performance Test Condition Phase, Hz Single, 50 Single, 50 Power Supply Min. Mid. Max. Min. Mid. Max. 1.70 4.00 4.80 1.90 5.00 5.80 Capacity BTU/h 5800 13600 16400 6480 17100 19800 kJ/h 6120 14400 17280...
  • Page 13 Model Indoor/Outdoor CS-MPS9SKH / CU-34S34SBH CS-MPS12SKH / CU-4S34SBH Performance Test Condition Phase, Hz Single, 50 Single, 50 Power Supply Min. Mid. Max. Min. Mid. Max. 1.70 2.80 3.40 1.70 3.20 4.00 Capacity BTU/h 5800 9550 11600 5800 10900 13600 kJ/h...
  • Page 14 Model Indoor/Outdoor CS-MPS15SKH / CU-4S34SBH CS-MPS18SKH / CU-4S34SBH Performance Test Condition Phase, Hz Single, 50 Single, 50 Power Supply Min. Mid. Max. Min. Mid. Max. 1.70 4.00 4.80 1.90 5.00 5.80 Capacity BTU/h 5800 13600 16400 6480 17100 19800 kJ/h 6120 14400 17280...
  • Page 15 Model Indoor/Outdoor CS-MPS24SKH / CU-4S34SBH CS-MPS28SKH / CU-4S34SBH Performance Test Condition Phase, Hz Single, 50 Single, 50 Power Supply Min. Mid. Max. Min. Mid. Max. 1.90 6.00 6.20 2.00 7.00 7.20 Capacity BTU/h 6480 20500 21100 6820 23900 24600 kJ/h 6840 21600 22320...
  • Page 16  Multi split combination possibility: - A single outdoor unit enables air conditioning of up to two separate rooms for CU-2S18SKH. - A single outdoor unit enables air conditioning of up to three separate rooms for CU-3S27SBH, CU-3S28SBH. - A single outdoor unit enables air conditioning of up to four separate rooms for CU-4S27SBH, CU-4S34SBH. Outdoor Unit CU-2S18SKH CU-3S27SBH...
  • Page 17 Cooling Capacity (kW) Input Power (W) Current, 50Hz, Indoor unit capacity MOISTURE REMOVAL VOLUME 220V / 240V Cooling Total min ~ max Rating min ~ max 2.8 + 2.8 + 2.8 7.50 2.4 ~ 7.6 2740 580 ~ 3170 13.5 / 12.4 1.5 + 1.5 + 1.5 2.8 + 2.8 + 3.2 7.50...
  • Page 18 Cooling Capacity (kW) Input Power (W) Current, 50Hz, Indoor unit capacity MOISTURE REMOVAL VOLUME 220V / 240V Cooling Total min ~ max Rating min ~ max 2.8 + 2.8 + 2.8 7.50 2.4 ~ 7.9 2740 580 ~ 2840 13.4 / 12.3 1.5 + 1.5 + 1.5 2.8 + 2.8 + 3.2 7.50...
  • Page 19 Cooling Capacity (kW) Input Power (W) Current, 50Hz, Indoor unit capacity MOISTURE REMOVAL VOLUME 220V / 240V Cooling Total min ~ max Rating min ~ max 2.8 + 2.8 + 2.8 + 2.8 7.50 2.8 ~ 8.0 2060 520 ~ 2650 10.2 / 9.4 1.2 + 1.2 + 1.2 + 1.2 2.8 + 2.8 + 2.8 + 3.2...
  • Page 20 Cooling Capacity ANNUAL Input Power (W) Current, MOISTURE REMOVAL (kW) Indoor unit capacity ENERGY 50Hz, 220V / VOLUME Cooling CONSUMPTION 240V (A) Total min ~ max Rating min ~ max CLASS (kWh) 3.2 + 3.2 + 6.0 10.00 2.9 ~ 10.7 3040 390 ~ 3540 3.29...
  • Page 21 Cooling Capacity ANNUAL Input Power (W) Current, MOISTURE REMOVAL (kW) Indoor unit capacity ENERGY 50Hz, 220V / VOLUME Cooling CONSUMPTION 240V (A) Total min ~ max Rating min ~ max CLASS (kWh) 3.2 + 3.2 + 3.2 + 6.0 10.00 2.9 ~ 11.0 2860 510 ~ 3530...

  • Page 22: Location Of Controls And Components

    3. Location of Controls and Components Indoor Unit Aluminium fin Auto OFF/ON button Front Panel • Use when remote control is misplaced or a malfunction occurs. Air filters Anti-bacterial filter Indicator (Green) POWER (Orange) TIMER Remote control receiver Maximum distances: 8m Vertical airflow Horizontal airflow direction louver direction louver...

  • Page 23: Dimensions

    4. Dimensions Indoor Unit 4.1.1 CS-MPS9SKH CS-MPS12SKH CS-MPS15SKH <Top View> <Side View> <Side View> Air intake <Front View> direction Right piping Left piping Air outlet hole hole direction <Remote Control> <Bottom View> A U T O F A N C O O L...
  • Page 24 4.1.2 CS-MPS18SKH CS-MPS24SKH CS-MPS28SKH <Top View> <Side View> <Side View> <Front View> Air intake direction Left piping Right piping 1070 hole Air outlet hole direction <Remote Control> <Bottom View> A U T O F A N S P E E D C O O L D R Y A IR...

  • Page 25: Refrigeration Cycle Diagram

    5. Refrigeration Cycle Diagram INDOOR LIQUID SIDE 2-WAY VALVE PIPE TEMP. SENSOR INTAKE TEMP. SENSOR HEAT EXCHANGER (EVAPORATOR) SIDE 3-WAY VALVE COOLING...

  • Page 26: Block Diagram

    6. Block Diagram CS-MPS9SKH CS-MPS12SKH CS-MPS15SKH (INDOOR UNIT) C-FM FAN MOTOR THERMAL FUSE C330 CS-MPS18SKH CS-MPS24SKH CS-MPS28SKH (INDOOR UNIT) FUSE THERMAL FUSE...

  • Page 27: Cs-Mps28Skh

    (WHT) (YLW) FAN MOTOR W W W W W CN–DISP (WHT) REMOTE CONTROLLER ELECTRONIC CONTROLLER (DISPLAY & RECEIVER) Resistance of Indoor Fan Motor Windings CS-MPS9SKH / CS-MPS12SKH / MODEL CS-MPS15SKH CONNECTION CWA921447 BLUE-YELLOW 336 Ω YELLOW-RED 306 Ω Note: Resistance at 25°C of ambient temperature.
  • Page 28 7.1.2 CS-MPS18SKH CS-MPS24SKH CS-MPS28SKH TERMINAL CN–CNT AUTO SW FUSE301 BOARD AC306 (WHT) (SW01) T3.15A L250V (BLK) OUTDOOR UNIT AC303 TEMP. (WHT) FUSE 102°C (3A) AC304 (RED) G301 (GRN) TO OUTDOOR NOISE FILTER UNIT CIRCUIT UP DOWN GROUNDING LOUVER MOTOR COMMUNICATION TERMINAL CIRCUIT RECTIFICATION...

  • Page 29: Electronic Circuit Diagram

    8. Electronic Circuit Diagram Indoor Unit 8.1.1 CS-MPS9SKH CS-MPS12SKH CS-MPS15SKH SW01 CN–CNT TERMINAL FUSE301 (WHT) BOARD AC306 T3.15A L250V (BLK) 0.01u OUTDOOR UNIT *C57 *C56 1000p 1000p AC303 TEMP. 0.01u (WHT) HAJEM-A FUSE (WHT) 102°C (3A) AC304 (RED) G301 *R37 (GRN) 5.1k...
  • Page 30 8.1.2 CS-MPS18SKH CS-MPS24SKH CS-MPS28SKH SW01 CN–CNT TERMINAL FUSE301 (WHT) BOARD AC306 T3.15A L250V (BLK) 0.01u OUTDOOR UNIT *C57 *C56 1000p 1000p AC303 0.01u TEMP. (WHT) FUSE HAJEM-A 102°C (3A) (WHT) AC304 (RED) G301 *R37 (GRN) TO OUTDOOR 5.1k NOISE FILTER UNIT CIRCUIT *R54...

  • Page 31: Printed Circuit Board

    9. Printed Circuit Board Indoor Unit 9.1.1 Main Printed Circuit Board 9.1.1.1 CS-MPS9SKH CS-MPS12SKH CS-MPS15SKH AC303 (WHT) RY-PWR CN-PCFM SW01 CN-FB CN-RMT CN-CNT CN-STM1 HAJEM-A CN-DISP CN-TH JP1 (Random Auto Restart Enable/Disable)
  • Page 32 9.1.1.2 CS-MPS18SKH CS-MPS24SKH CS-MPS28SKH AC303 (WHT) RY-PWR SW01 CN-FM CN-CNT CN-RMT CN-STM1 HAJEM-A CN-DISP CN-TH JP1 (Random Auto Restart Enable/Disable) 9.1.2 Indicator & Receiver Printed Circuit Board CN-DISP...

  • Page 33: Installation Instruction

    10. Installation Instruction 10.1 Select the Best Location 10.1.1 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. ...

  • Page 34: Indoor Unit

    10.2 Indoor Unit 10.2.1 How to Fix Installation Plate The mounting wall shall be strong and solid enough to prevent it from the vibration. Wall Wall Wall More than 1 More than 1 Indoor unit More 2 screw than 2 128 mm 241.5 mm Installation...
  • Page 35 10.2.3 Indoor Unit Installation Do not turn over the unit without it’s shock absorber during pull out the piping. It may cause intake grille damage. Use shock absorber during pull out the piping to protect the intake grille from damage. Piping Piping Intake grille...
  • Page 36 Replace the drain hose Rear view for left piping installation Connection cable Drain hose Piping More than Connection cable 1150 mm Drain hose Drain hose Drain cap Sleeve for piping hole Adjust the piping slightly downwards. • • How to pull the piping and drain hose out, in case of the In case of left piping how to insert the embedded piping.
  • Page 37 10.2.5 Wire Stripping and Connecting Requirement Wire stripping Conductor Conductor Conductor not fully inserted over inserted fully inserted Indoor/outdoor connection terminal board 5 mm or more No loose strand when inserted ACCEPT PROHIBITED PROHIBITED (gap between wires) RISK OF FIRE JOINING OF WIRES MAY CAUSE WARNING...

  • Page 38: Operation Control

    11. Operation Control 11.1 Basic Function Inverter control, which equipped with a microcomputer in determining the most suitable operation mode as time passes, automatically adjusts output power for maximum comfort always. In order to achieve the suitable operation mode, the microcomputer maintains the set temperature by measuring the temperature of the environment and performing temperature shifting.

  • Page 39: Indoor Fan Motor Operation

    11.2 Indoor Fan Motor Operation 11.2.1 Basic Rotation Speed  Manual Fan Speed Fan motor’s number of rotation is determined according to remote control setting. Remote control ○ ○ ○ ○ ○  Auto Fan Speed According to room temperature and setting temperature, indoor fan speed is determined automatically. The indoor fan will operate according to pattern below.

  • Page 40: Timer Control

    11.3.2 Horizontal Airflow The horizontal airflow direction louvers can be adjusted manually by hand. 11.4 Timer Control 11.4.1 ON Timer Control ON timer can be set using remote control, where the unit with timer set will start operation earlier than the setting time.

  • Page 41: Servicing Mode

    12. Servicing Mode 12.1 Auto Off/On Button Auto OFF/ON Auto OFF/ON Button Pressed Button Pressed 5 sec Auto Operation Test Run Operation Stop (Forced Cooling Operation) 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.

  • Page 42: Remote Control Button

    12.2 Remote Control Button 12.2.1 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 unit a “beep” sound is heard as confirmation of transmission code change. 12.2.2 RESET (RC) Button ...

  • Page 43: Troubleshooting Guide

    13. Troubleshooting Guide 13.1 Refrigeration Cycle System In order to diagnose malfunctions, ensure the air conditioner is free Normal Pressure and Outlet Air Temperature (Standard) Gas Pressure Outlet air from electrical problems before inspecting the refrigeration cycle. Temperature Such problems include insufficient insulation, problem with the (kg/cm (°C) power source, malfunction of a compressor and a fan.
  • Page 44 13.1.1 Relationship Between the Condition of the Air Conditioner and Pressure and Electric Current Cooling Mode Condition of the air conditioner Low Pressure High Pressure Electric current during operation Insufficient refrigerant    (gas leakage) Clogged capillary tube or ...

  • Page 45: Breakdown Self Diagnosis Function

    13.2 Breakdown Self Diagnosis Function 13.2.1 Self Diagnosis Function (Three Digits Alphanumeric Code)  Once error 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 ON again.

  • Page 46: Error Code Table

    13.3 Error Code Table Diagnosis Abnormality / Protection Abnormality Protection Problem Check location display control Judgment Operation No memory of failure — Normal operation — — Indoor fan only  Indoor/outdoor wire terminal operation can start Indoor/outdoor  Indoor/outdoor PCB Indoor/outdoor abnormal After operation for by entering into...
  • Page 47 Diagnosis Abnormality / Protection Abnormality Protection Problem Check location display control Judgment Operation  Light sensor (defective or Continuous for Light sensor open or short Light sensor abnormality — 24 hours, 15 days circuit disconnect)  Outdoor fan motor lead wire Outdoor fan motor 2 times happen Outdoor fan motor lock or...

  • Page 48: Troubleshooting Flowchart

    13.4 Troubleshooting Flowchart 13.4.1 H11 (Indoor/Outdoor Abnormal Communication) Malfunction Decision Conditions  During startup and operation of cooling, the data received from outdoor unit in indoor unit signal transmission is checked whether it is normal. Malfunction Caused  Faulty indoor unit PCB. ...
  • Page 49 13.4.2 H12 (Indoor/Outdoor Capacity Rank Mismatched) Malfunction Decision Conditions  During startup, error code appears when different types of indoor and outdoor units are interconnected. Malfunction Caused  Wrong models interconnected.  Wrong indoor unit or outdoor unit PCBs mounted. ...
  • Page 50 13.4.3 H14 (Indoor Intake Air Temperature Sensor Abnormality) Malfunction Decision Conditions  During startup and operation of cooling, the temperatures detected by the indoor intake air temperature sensor are used to determine sensor errors. Malfunction Caused  Faulty connector connection. ...
  • Page 51 13.4.4 H15 (Compressor Temperature Sensor Abnormality) Malfunction Decision Conditions  During startup and operation of cooling, the temperatures detected by the outdoor compressor temperature sensor are used to determine sensor errors. Malfunction Caused  Faulty connector connection.  Faulty sensor. ...
  • Page 52 13.4.5 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 1.14A) for continuously 20 seconds. Malfunction Caused ...
  • Page 53 13.4.6 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 ...
  • Page 54 13.4.7 H23 (Indoor Pipe Temperature Sensor Abnormality) Malfunction Decision Conditions  During startup and operation of cooling, the temperatures detected by the indoor heat exchanger temperature sensor are used to determine sensor errors. Malfunction Caused  Faulty connector connection.  Faulty sensor.
  • Page 55 13.4.8 H27 (Outdoor Air Temperature Sensor Abnormality) Malfunction Decision Conditions  During startup and operation of cooling, the temperatures detected by the outdoor air temperature sensor are used to determine sensor errors. Malfunction Caused  Faulty connector connection.  Faulty sensor. ...
  • Page 56 13.4.9 H28 (Outdoor Pipe Temperature Sensor Abnormality) Malfunction Decision Conditions  During startup and operation of cooling, the temperatures detected by the outdoor pipe temperature sensor are used to determine sensor errors. Malfunction Caused  Faulty connector connection.  Faulty sensor. ...
  • Page 57 13.4.10 H30 (Compressor Discharge Temperature Sensor Abnormality) Malfunction Decision Conditions  During startup and operation of cooling, the temperatures detected by the outdoor discharge pipe temperature sensor are used to determine sensor errors. Malfunction Caused  Faulty connector connection.  Faulty sensor.
  • Page 58 13.4.11 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.
  • Page 59 13.4.12 H34 (Outdoor Heat Sink Temperature Sensor Abnormality) Malfunction Decision Conditions  During startup and operation of cooling, the temperatures detected by the outdoor heat sink temperature sensor are used to determine sensor errors. Malfunction Caused  Faulty connector connection. ...
  • Page 60 13.4.13 H36 (Outdoor Gas Pipe Sensor Abnormality) Malfunction Decision Conditions  During startup and operation of cooling, the temperatures detected by the outdoor gas pipe temperature sensor are used to determine sensor errors. Malfunction Caused  Faulty connector connection.  Faulty sensor.
  • Page 61 13.4.14 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. ...
  • Page 62 13.4.15 H98 (Indoor High Pressure Protection) Error Code will not display (no Timer LED blinking) but store in EEPROM Malfunction Decision Conditions  During operation, the temperature detected by the indoor pipe temperature sensor is above 60°C. Malfunction Caused  Clogged air filter of the indoor unit.
  • Page 63 13.4.16 H99 (Indoor Freeze Prevention Protection: Cooling or Soft Dry) 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. ...
  • Page 64 13.4.17 F11 (Indoor Pipe Temperature Sensor Abnormality) Malfunction Decision Conditions  When cooling operation, when indoor pipe temperature or indoor heat exchanger temperature sensor is above 45°C. Malfunction Caused  Faulty connector connection.  Faulty indoor pipe temperature sensor.  Faulty indoor main PCB.
  • Page 65 13.4.18 F17 (Indoor Standby Units Freezing Abnormality) Malfunction Decision Conditions  When the different between indoor intake air temperature and indoor pipe temperature is above 10°C or indoor pipe temperature is below -1.0°C. Remark: When the indoor standby unit is freezing, the outdoor unit transfers F17 error code to the corresponding indoor unit and H39 to other indoor unit(s).
  • Page 66 13.4.19 F90 (Power Factor Correction Protection) Malfunction Decision Conditions  During startup and operation of cooling, 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. ...
  • Page 67 13.4.20 F91 (Refrigeration Cycle Abnormality) Malfunction Decision Conditions  During cooling, compressor frequency = Fcmax.  During cooling operation, running current: 0.65A < I < 1.65A.  During cooling, indoor intake - indoor pipe < 4°C. Malfunction Caused  Refrigerant shortage (refrigerant leakage) ...
  • Page 68 13.4.21 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 For safety reason and to prevent component When F93 indication happens.
  • Page 69 13.4.22 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. ...
  • Page 70 13.4.23 F96 (IPM Overheating) Malfunction Decision Conditions During operating of cooling, when IPM temperature data (100°C) is detected by the IPM temperature sensor. Malfunction Caused  IPM overheats due to short circuit of hot discharge air flow.  IPM overheats due to defective of outdoor fan motor. ...
  • Page 71 13.4.24 F97 (Compressor Overheating) Malfunction Decision Conditions During operation of cooling, 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 When F97 indication happens.
  • Page 72 13.4.25 F98 (Input Over Current Detection) Malfunction Decision Conditions During cooling operation, when an input over-current (X value in Total Running Current Control) is detected by checking the input current value being detected by current transformer (CT) with the compressor running. Malfunction Caused ...
  • Page 73 13.4.26 F99 (Output Over Current Detection) Malfunction Decision Conditions During operation of cooling, when an output over-current (18.5A) is detected by checking the current that flows in the inverter DC peak sensing circuitry. Malfunction Caused  DC peak due to compressor failure. ...

  • Page 74: Disassembly And Assembly Instructions

    High Voltage is 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. 14.1 CS-MPS9SKH CS-MPS12SKH CS-MPS15SKH 14.1.1 Indoor Electronic Controllers, Cross Flow Fan and Indoor Fan Motor Removal Procedures 14.1.1.1...
  • Page 75 Detach connectors as labeled from the Pull out the main electronic controller. Then pull out main electronic controller controller gently. halfway. AC303 (White) RY-PWR connector (Black and Brown) CN-PCFM CN-FB Remove screw to remove terminal board complete CN-STM1 and earth wire. Detach the CN-DISP connector then remove Detach the Earth wire.
  • Page 76 14.1.1.5 To Remove Cross Flow Fan and Indoor Fan Motor 13. Remove the screw that holding the cross flow fan and fan motor axis. Figure 7 Holdfast 15. Remove the bearing by pulling it 14. Remove the screw from the out gently.
  • Page 77 Cross Flow Fan Reminder: To reinstall the cross flow fan, ensure cross flow fan is in line as shown in figure 10. Figure 10...

  • Page 78: Cs-Mps18Skh Cs-Mps24Skh Cs-Mps28Skh

    WARNING High Voltage is 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. 14.2 CS-MPS18SKH CS-MPS24SKH CS-MPS28SKH 14.2.1 Indoor Electronic Controllers, Cross Flow Fan and Indoor Fan Motor Removal Procedures 14.2.1.1 To Remove Front Grille...
  • Page 79 14.2.1.3 To Remove Discharge Grille Discharge Grille 10. Pull out to remove the drain hose (behind the discharge grille) from the discharge grille outlet. 11. Then pull the discharge grille downward gently to dismantle it. Figure 5 14.2.1.4 To Remove Control Board 12.
  • Page 80 Holdfast 15. Remove the screw from the evaporator. 14. Remove the bearing by pulling it out gently. Figure 8 16. Push the holdfast to the left and lift up the evaporator. 18. Fan motor can be removed after Evaporator 17. Remove the cross flow fan from the unit the removal of cross flow fan.

  • Page 81: Exploded View And Replacement Parts List

    15. Exploded View and Replacement Parts List 15.1 Indoor Unit 15.1.1 CS-MPS9SKH CS-MPS12SKH CS-MPS15SKH CWH55025J CWH55051J Note The above exploded view is for the purpose of parts disassembly and replacement. The non-numbered parts are not kept as standard service parts.
  • Page 82 SAFETY REF. NO. PART NAME & DESCRIPTION CS-MPS9SKH CS-MPS12SKH CS-MPS15SKH REMARK CHASSIS COMPLETE CWD50C1901 ← ← FAN MOTOR CWA921447 ← ← CROSS-FLOW FAN COMPLETE CWH02C1076 ← ← BEARING ASS’Y CWH64K007 ← ← SCREW - CROSS-FLOW FAN CWH551146 ← ← EVAPORATOR...
  • Page 83 15.1.2 CS-MPS18SKH CS-MPS24SKH CS-MPS28SKH CWH55025J CWH55051J Note The above exploded view is for the purpose of parts disassembly and replacement. The non-numbered parts are not kept as standard service parts.
  • Page 84 SAFETY REF. NO. PART NAME & DESCRIPTION CS-MPS18SKH CS-MPS24SKH CS-MPS28SKH REMARK CHASSIS COMPLETE CWD50C1902 ← ← FAN MOTOR L6CBYYYL0037 ← ← CROSS-FLOW FAN COMPLETE CWH02C1077 ← ← BEARING ASS’Y CWH64K007 ← ← SCREW - CROSS-FLOW FAN CWH551146 ← ← EVAPORATOR ACXB30C02640 CWB30C2783 ←...

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