Panasonic CS-RE18PKR Service Manual
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Panasonic CS-RE18PKR Service Manual

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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 product or products dealt with in this service information by anyone else could result in serious injury or death.
In order to avoid frostbite, be assured of no refrigerant leakage during the installation or repairing of refrigeration circuit.
WARNING
PRECAUTION OF LOW TEMPERATURE
Indoor Unit
CS-RE18PKR
CS-RE24PKR
CS-RE28PKR
© Panasonic Corporation 2013
Order No: PAPAMY1308065CE
Outdoor Unit
CU-RE18PKR
CU-RE24PKR
CU-RE28PKR
Destination
Oceania

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Summary of Contents for Panasonic CS-RE18PKR

  • Page 1 PRECAUTION OF LOW TEMPERATURE In order to avoid frostbite, be assured of no refrigerant leakage during the installation or repairing of refrigeration circuit. © Panasonic Corporation 2013...

  • Page 2: Table Of Contents

    5.2 Outdoor Unit ..........14 16. Disassembly and Assembly Instructions ... 102 6. Refrigeration Cycle Diagram ......16 16.1 Indoor Electronic Controllers, Cross Flow 6.1 CS-RE18PKR CU-RE18PKR .......16 Fan and Indoor Fan Motor Removal 6.2 CS-RE24PKR CU-RE24PKR CS-RE28PKR CU-RE28PKR .......17 Procedures ..........102 16.2 Outdoor Electronic Controller Removal...

  • 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.).

  • Page 5: Specifications

    2. Specifications Indoor CS-RE18PKR Model Outdoor CU-RE18PKR Performance Test Condition Phase, Hz Single, 50 Power Supply Min. Mid. Max. 0.90 5.00 5.80 Capacity BTU/h 3070 17100 19800 kcal/h 4300 4990 Running Current Input Power 1.30k 2.05k 3.91 3.85 / 2.5 2.83...
  • Page 6 Indoor CS-RE18PKR Model Outdoor CU-RE18PKR Type Cross-flow Fan Material ASG30K1 Motor Type Transistor Motor (8-poles) Input Power 94.8 Output Power Cool Heat Cool Heat Cool 1140 Speed Heat 1170 Cool 1340 Heat 1370 Cool 1460 Heat 1520 Type Propeller Fan...
  • Page 7 Indoor CS-RE18PKR Model Outdoor CU-RE18PKR Pipe Diameter (Liquid / Gas) mm (inch) 6.35 (1/4) / 12.70 (1/2) Standard length m (ft) 5.0 (16.4) Length range (min – max) m (ft) 3 (9.8) ~ 20 (65.6) I/D & O/D Height Different m (ft) 15 (49.2)
  • Page 8 Indoor CS-RE24PKR CS-RE28PKR Model Outdoor CU-RE24PKR CU-RE28PKR Performance Test Condition Phase, Hz Single, 50 Single, 50 Power Supply Min. Mid. Max. Min. Mid. Max. 1.70 7.00 7.70 2.30 8.00 8.40 Capacity BTU/h 5800 23900 26300 7840 27300 28600 kcal/h 1460 6020 6620 1980...
  • Page 9 Indoor CS-RE24PKR CS-RE28PKR Model Outdoor CU-RE24PKR CU-RE28PKR Type Cross-flow Fan Cross-flow Fan Material ASG30K1 ASG30K1 Motor Type Transistor Motor (8-poles) Transistor Motor (8-poles) Input Power 94.8 94.8 Output Power Cool Heat 1000 Cool 1070 Heat 1060 1100 Cool 1280 1320 Speed Heat 1310...
  • Page 10 Indoor CS-RE24PKR CS-RE28PKR Model Outdoor CU-RE24PKR CU-RE28PKR Pipe Diameter (Liquid / Gas) mm (inch) 6.35 (1/4) / 15.88 (5/8) 6.35 (1/4) / 15.88 (5/8) Standard length m (ft) 5.0 (16.4) 5.0 (16.4) Length range (min – max) m (ft) 3 (9.8) ~ 30 (98.4) 3 (9.8) ~ 30 (98.4) I/D &...

  • Page 11: Features

    3. Features  Super Alleru-buster Filter  Inverter Technology Wider output range Energy saving Quick Cooling More precise temperature control  Environment Protection Non-ozone depletion substances refrigerant (R410A)  Long Installation Piping Long piping up to 20 meter (2.0HP), 30 meter (2.5HP ~ 3.0HP) ...

  • Page 12: Location Of Controls And Components

    4. Location of Controls and Components Indoor Unit Outdoor Unit Remote Control...

  • Page 13: Dimensions

    5. Dimensions Indoor Unit & Remote Control...

  • Page 14: Outdoor Unit

    Outdoor Unit 5.2.1 CU-RE18PKR CU-RE24PKR...
  • Page 15 5.2.2 CU-RE28PKR...

  • Page 16: Refrigeration Cycle Diagram

    6. Refrigeration Cycle Diagram CS-RE18PKR CU-RE18PKR...

  • Page 17: Cs-Re24Pkr Cu-Re24Pkr Cs-Re28Pkr Cu-Re28Pkr

    CS-RE24PKR CU-RE24PKR CS-RE28PKR CU-RE28PKR...

  • Page 18: Block Diagram

    7. Block Diagram CS-RE18PKR CU-RE18PKR...

  • Page 19: Cs-Re24Pkr Cu-Re24Pkr

    CS-RE24PKR CU-RE24PKR...

  • Page 20: Cs-Re28Pkr Cu-Re28Pkr

    CS-RE28PKR CU-RE28PKR...

  • Page 21: Wiring Connection Diagram

    8. Wiring Connection Diagram Indoor Unit 8.1.1 CS-RE18PKR CS-RE24PKR...
  • Page 22 8.1.2 CS-RE28PKR...

  • Page 23: Outdoor Unit

    Outdoor Unit 8.2.1 CU-RE18PKR Compressor Winding Resistance Outdoor Fan Motor Winding MODEL CU-RE18PKR MODEL CU-RE18PKR CONNECTION 5RD132XFA21 CONNECTION CWA951620 U - V 1.152 Ω YELLOW - BLUE 115.8 Ω U - W 1.152 Ω YELLOW - ORANGE 71.71 Ω V - W 1.152 Ω...
  • Page 24 8.2.2 CU-RE24PKR Compressor Winding Resistance MODEL CU-RE24PKR CONNECTION 5KD240XAF21 U - V 0.720 Ω U - W 0.726 Ω V - W 0.708 Ω Winding Resistance at 20°C.
  • Page 25 8.2.3 CU-RE28PKR Compressor Winding Resistance MODEL CU-RE28PKR CONNECTION 5KD240XAF21 U - V 0.720 Ω U - W 0.726 Ω V - W 0.708 Ω Winding Resistance at 20°C.

  • Page 26: Electronic Circuit Diagram

    9. Electronic Circuit Diagram Indoor Unit 9.1.1 CS-RE18PKR CS- RE24PKR...
  • Page 27 9.1.2 CS-RE28PKR...

  • Page 28: Outdoor Unit

    Outdoor Unit 9.2.1 CU-RE18PKR...
  • Page 29 9.2.2 CU-RE24PKR...
  • Page 30 9.2.3 CU-RE28PKR...

  • Page 31: Printed Circuit Board

    10. Printed Circuit Board 10.1 Indoor Unit 10.1.1 Main Printed Circuit Board 10.1.2 Indicator Printed Circuit Board...

  • Page 32: Outdoor Unit

    10.2 Outdoor Unit 10.2.1 Main Printed Circuit Board 10.2.1.1 CU-RE18PKR CU-RE24PKR...
  • Page 33 10.2.1.2 CU-RE28PKR...

  • Page 34: Installation Instruction

    11. Installation Instruction 11.1 CS-RE18PKR CU-RE18PKR CS-RE24PKR CU-RE24PKR 11.1.1 Select the Best Location 11.1.1.1 Indoor Unit 11.1.1.3 Indoor/Outdoor Unit Installation Diagram  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 35: How To Fix Installation Plate

    11.1.2 Indoor Unit 11.1.2.1 How to Fix Installation Plate The mounting wall shall be strong and solid enough to prevent it from the vibration. Dimension Model RE18***, RE24*** 590 mm 82 mm 539 mm 532 mm 169 mm 219 mm The centre of installation plate should be at more than 1 at right and left of the wall.
  • Page 36 11.1.2.3 Indoor Unit Installation 1. For the Right Rear Piping 2. For the Right and Right Bottom Piping 3. For the Embedded Piping (This can be used for left rear piping and bottom piping also.)

  • Page 37: Connect The Cable To The Indoor Unit

    11.1.2.4 Connect the Cable to the Indoor Unit The inside and outside connecting cable can be connected without removing the front grille. Connecting cable between indoor unit and outdoor unit shall be approved polychloroprene sheathed 4 × 1.5 mm flexible cord, type designation 245 IEC 57 or heavier cord.

  • Page 38: Install The Outdoor Unit

    11.1.2.5 Wire Stripping and Connecting Requirement Cutting and Flaring the Piping Please cut using pipe cutter and then remove the burrs. 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.

  • Page 39: Evacuation Of The Equipment

    11.1.3.3 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. 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.

  • Page 40: Connect The Cable To The Outdoor Unit

    11.1.3.4 Connect the Cable to the Outdoor Unit Remove the control board cover from the unit by loosening the screw. Cable connection to the power supply through Isolating Devices (Disconnecting means). Connect approved type polychloroprene sheathed power supply cord 3 × 2.5 mm (2.0 ~ 2.5HP) type designation 245 IEC 57 or heavier cord to the terminal board, and connect the others end of the cord to...

  • Page 41: Cs-Re28Pkr Cu-Re28Pkr

    11.2 CS-RE28PKR CU-RE28PKR 11.2.1 Select the Best Location 11.2.1.1 Indoor Unit 11.2.1.3 Indoor/Outdoor Unit Installation  Diagram 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 42 11.2.2 Indoor Unit 11.2.2.1 How to Fix Installation Plate The mounting wall shall be strong and solid enough to prevent it from the vibration. Dimension Model RE28*** 590 mm 82 mm 539 mm 532 mm 169 mm 219 mm The center of installation plate should be at more than 1 at right and left of the wall. The distance from installation plate edge to ceiling should more than 2.
  • Page 43 11.2.2.3 Indoor Unit Installation 1. For the Right Rear Piping 2. For the Right and Right Bottom Piping 3. For the Embedded Piping (This can be used for left rear piping and bottom piping also.)
  • Page 44 11.2.2.4 Connect the Cable to the Indoor Unit The inside and outside connecting cable can be connected without removing the front grille. 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.
  • Page 45 11.2.2.5 Wire Stripping and Connecting Requirement Cutting and Flaring the Piping Please cut using pipe cutter and then remove the burrs. 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.
  • Page 46 11.2.3.2 Connect the Piping Connecting the Piping to Indoor Do not overtighten, overtightening may cause gas leakage. Please make flare after inserting flare nut (locate at joint Piping size Torque portion of tube assembly) onto the copper pipe. (In case of using long piping) 6.35 mm (1/4″) [18 N•m (1.8 kgf.m)] Connect the piping...
  • Page 47 11.2.3.3 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. 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.
  • Page 48 11.2.3.4 Connect the Cable to the Outdoor Unit Remove the control board cover from the unit by loosening the screw. Cable connection to the power supply through Isolating Devices (Disconnecting means). Connect approved type polychloroprene sheathed power supply cord 3 × 4.0 mm (3.0HP) type designation 245 IEC 57 or heavier cord to the terminal board, and connect the others end of the cord to Isolating Devices (Disconnecting means).
  • Page 49 11.2.3.5 Piping Insulation 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. 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 6 mm or above.

  • Page 50: Operation And Control

    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.

  • Page 51: Automatic Operation

    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 and indoor intake air temperature.  During operation mode judgment, indoor fan motor (with speed of Lo-) is running for 30 seconds to detect the indoor intake air temperature.

  • Page 52: Outdoor Fan Motor Operation

    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. [Heating]  According to indoor pipe temperature, automatic heating fan speed is determined as follows. B.

  • Page 53: Vertical Airflow

    12.4.1 Vertical Airflow Vane Angle (°) Operation Mode Airflow Direction Auto with Heat Exchanger Temperature Heating Manual Auto 20 ~ 45 Cooling Manual Auto 20 ~ 45 Soft Dry Manual Automatic vertical airflow direction can be set using remote control; the vane swings up and down within the angles as stated above.

  • Page 54: Quiet Operation (Cooling Mode/Cooling Area Of Dry Mode)

    Manual horizontal airflow direction can be set using remote control; the angles of the vane are as stated below and the positions of the vane are as Figure 2 above. Pattern Airflow Direction Patterns at Remote Control Vane Angle (°) 12.5 Quiet Operation (Cooling Mode/Cooling Area of Dry Mode) A.

  • Page 55: Powerful Mode Operation

    C. Control contents a. Fan Speed manual Fan speed is changed from normal setting to quiet setting of respective fan speed. This is to reduce sound of Hi, Me, Lo for 3dB. Fan speed for quiet operation is reduced from setting fan speed. b.

  • Page 56: Auto Restart Control

    12.10 Auto Restart Control 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.
  • Page 57 Example of wiring: Note: The wire length from indoor unit to the external interface must be within 1.9 meters. The wire must be double insulation type and a ferrite core to be added to reduce noise. Proposed core spec is J0KE00000147 with Heat Shrinkage Tube.

  • Page 58: Protection Control

    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. ...
  • Page 59 13.1.4 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 103°C, compressor will be stopped, occurs 4 times per 20 minutes, timer LED will be blinking.

  • Page 60: Protection Control For Cooling & Soft Dry Operation

    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. ...

  • Page 61: Odor Cut Control

    13.2.6 Odor Cut Control  To reduce the odor released from the unit. Start Condition  AUTO FAN Speed is selected during COOL or DRY operation.  During freeze prevention control and timer preliminary operation, this control is not applicable. Control content ...

  • Page 62: Demand Control

    13.3.7 Demand Control  When the air-conditioner connected to Demand Response Enabling Devices (DRED), the power consumption especially during peak hours could be controlled.  Three Demand response modes (DRM) are available DRM1 = Compressor cut off DRM2 = Operate at 50% of rated input power DRM3 = Operate at 75% of rated input power ...

  • Page 63: Servicing Mode

    14. Servicing Mode 14.1 Auto OFF/ON Button 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. 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.
  • Page 64 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”...

  • Page 65: Remote Control Button

    14.2 Remote Control Button 14.2.1 SET Button  To limit set temperature range for COOL/DRY and HEAT mode. Set temperature range selection 14.2.2 CLOCK BUTTON  To change the remote control’s time format Press for more than 5 seconds. 14.2.3 RESET (RC) ...
  • Page 66 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 to Degree Fahrenheit. Press continuously for 10 seconds.

  • Page 67: Troubleshooting Guide

    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.

  • Page 68: Relationship Between The Condition Of The Air Conditioner And Pressure And Electric Current

    15.2 Relationship Between the Condition of the Air Conditioner and Pressure and Electric Current Cooling Mode Heating Mode Condition of the Low Pressure High Pressure Electric current Low Pressure High Pressure Electric current air conditioner during operation during operation Insufficient refrigerant (gas leakage) Clogged capillary tube or Strainer...

  • Page 69: Breakdown Self Diagnosis Function

    15.3 Breakdown Self Diagnosis Function 15.3.1 Self Diagnosis Function (Three Digits Alphanumeric Code)  When the latest abnormality code on the main Once abnormality has occurred during operation, unit and code transmitted from the remote the unit will stop its operation, and Timer LEDs blink. ...

  • Page 70: Error Codes Table

    15.4 Error Codes Table Diagnosis Abnormality / Abnormality Protection Problem Check location display Protection control Judgment Operation No memory of failure — Normal operation — — Indoor fan only  Indoor/outdoor wire terminal Indoor/outdoor operation can Indoor/outdoor After operation for abnormal start by entering communication not...
  • Page 71  ECO patrol sensor ECO patrol sensor ECO patrol sensor open or Continuous for 70s — abnormality short circuit  ECO patrol and Indoor PCB Outdoor high High pressure sensor open  High pressure sensor Continuous for 1 pressure sensor —...

  • Page 72: Self-Diagnosis Method

    15.5 Self-diagnosis Method 15.5.1 H11 (Indoor/Outdoor Abnormal Communication) Malfunction Decision Conditions  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.
  • Page 73 15.5.2 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 74 15.5.3 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. ...
  • Page 75 15.5.4 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.
  • Page 76 15.5.5 H16 (Outdoor Current Transformer) Malfunction Decision Conditions  An input current, detected by Current Transformer CT, is below threshold value when the compressor is operating at certain frequency value for 3 minutes. Malfunction Caused  Lack of gas.  Broken CT (current transformer).
  • Page 77 15.5.6 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 78 15.5.7 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. ...
  • Page 79 15.5.8 H25 (e-ion Air Purifying System Abnormal) Malfunction Decision Conditions  During standby of cooling and heating operation, e-ion breakdown occurs and air conditioner stops operation. Malfunction Caused  Faulty indoor main PCB.  Faulty indoor e-ion power module. Troubleshooting...
  • Page 80 15.5.9 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. ...
  • Page 81 15.5.10 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. ...
  • Page 82 15.5.11 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. ...
  • Page 83 15.5.12 H32 (Outdoor Heat Exchanger Temperature Sensor 2 Abnormality) Malfunction Decision Conditions  During startup and operation of cooling and heating, the temperatures detected by the outdoor heat exchanger temperature sensor are used to determine sensor errors. Malfunction Caused  Faulty connector connection.
  • Page 84 15.5.13 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 85 15.5.14 H34 (Outdoor Heat Sink Temperature Sensor Abnormality) Malfunction Decision Conditions  During startup and operation of cooling and heating, the temperatures detected by the outdoor heat sink temperature sensor are used to determine sensor errors. Malfunction Caused  Faulty connector connection. ...
  • Page 86 15.5.15 H36 (Outdoor Gas Pipe Sensor Abnormality) Malfunction Decision Conditions  During startup and operation of cooling and heating, the temperatures detected by the outdoor gas pipe temperature sensor are used to determine sensor errors. Malfunction Caused  Faulty connector connection. ...
  • Page 87 15.5.16 H37 (Outdoor Liquid Pipe Temperature Sensor Abnormality) Malfunction Decision Conditions  During startup and operation of cooling and heating, the temperatures detected by the outdoor liquid pipe temperature sensor are used to determine sensor errors. Malfunction Caused  Faulty connector connection. ...
  • Page 88 15.5.17 H58 (Patrol Sensor Abnormality) Malfunction Decision Conditions  If Patrol sensor feedback is 0V or 5V continuous for 6 hours.  Error will display only when the Patrol operation is ON. Malfunction Caused  Faulty connector connection.  Faulty Patrol sensor. Troubleshooting...
  • Page 89 15.5.18 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 90 15.5.19 H98 (Error Code Stored in Memory and no alarm is triggered / no TIMER LED flashing) Malfunction Decision Conditions  Indoor high pressure is detected when indoor heat exchanger is detecting very high temperature when the unit is operating in heating operation. ...

  • Page 91: H99 (Indoor Freeze Prevention Protection: Cooling Or Soft Dry)

    15.5.20 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 ...
  • Page 92 15.5.21 F11 (4-way Valve Switching Failure) Malfunction Decision Conditions  When indoor heat exchanger is cold during heating (except deice) or when indoor heat exchanger is hot during cooling and compressor operating, the 4-way valve is detected as malfunction. Malfunction Caused ...
  • Page 93 15.5.22 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 94 15.5.23 F90 (Power Factor Correction Protection) Malfunction Decision Conditions  To maintain DC voltage level supply to power transistor.  To detect high DC voltage level after rectification. Malfunction Caused  During startup and operation of cooling and heating, when Power Factor Correction (PFC) protection circuitry at the outdoor unit main PCB senses abnormal DC voltage level for power transistors.
  • Page 95 15.5.24 F91 (Refrigeration Cycle Abnormality) Malfunction Decision Conditions  The input current is low while the compressor is running at higher than the setting frequency. Malfunction Caused  Lack of gas.  3-way valve close. Troubleshooting...
  • Page 96 15.5.25 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.  Faulty Outdoor PCB.  Faulty compressor. Troubleshooting...
  • Page 97 15.5.26 F95 (Outdoor High Pressure Protection: Cooling or Soft Dry) Malfunction Decision Conditions  During operation of cooling or soft dry, when outdoor unit heat exchanger high temperature data is detected by the outdoor unit heat exchanger thermistor. Malfunction Caused ...
  • Page 98 15.5.27 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.
  • Page 99 15.5.28 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  Faulty compressor tank temperature sensor.  2/3 way valve closed. ...
  • Page 100 15.5.29 F98 (Input Over Current Detection) Malfunction Decision Conditions  During operation of cooling and heating, 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.
  • Page 101 15.5.30 F99 (DC Peak Detection) Malfunction Decision Conditions  During startup and operation of cooling and heating, when inverter DC peak data is received by the outdoor internal DC Peak sensing circuitry. Malfunction Caused  DC current peak due to compressor failure. ...

  • Page 102: Disassembly And Assembly Instructions

    16. Disassembly and Assembly Instructions WARNING High Voltage 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...
  • Page 103 16.1.3 To Remove Main Electronic Controller Figure 3 Figure 4 Figure 5...
  • Page 104 16.1.4 To Remove Discharge Grille Figure 6 16.1.5 To Remove Control Board Figure 7 16.1.6 To Remove Cross Flow Fan and Indoor Fan Motor Figure 8...
  • Page 105 Figure 9 Figure 10 Figure 11...

  • Page 106: Outdoor Electronic Controller Removal Procedure

    16.2 Outdoor Electronic Controller Removal Procedure Remove the 4 screws of the Top Panel. Remove the Control Board. Fig. 4 Remove the 8 screws of the Electronic Controller. Fig. 1 Remove the 10 screws of the Front Panel. Fig. 2 Fig.

  • Page 107: Technical Data

    17. Technical Data 17.1 Operation Characteristics 17.1.1 CS-RE18PKR CU-RE18PKR Cooling Characteristic Condition Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Piping length: 5 m Compressor Freq: F...
  • Page 108 Piping Length Characteristic Cooling Condition Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Outdoor temperature: 35°C (DBT) Compressor Freq: F...
  • Page 109 Heating Characteristic Condition Room temperature: 20°C (DBT) Operation condition: High fan speed Piping length: 5 m Compressor Freq: F...
  • Page 110 Piping Length Characteristic Heating Condition Room temperature: 20°C (DBT) Operation condition: High fan speed Outdoor temperature: 7.0°C (DBT), 6.0°C (WBT) Compressor Freq: F...
  • Page 111 17.1.2 CS-RE24PKR CU-RE24PKR Cooling Characteristic Condition Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Piping length: 5 m Compressor Freq: F...
  • Page 112 Piping Length Characteristic Cooling Condition Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Outdoor temperature: 35°C (DBT) Compressor Freq: F...
  • Page 113 Heating Characteristic Condition Room temperature: 20°C (DBT) Operation condition: High fan speed Piping length: 5 m Compressor Freq: F...
  • Page 114 Piping Length Characteristic Heating Condition Room temperature: 20°C (DBT) Operation condition: High fan speed Outdoor temperature: 7.0°C (DBT), 6.0°C (WBT) Compressor Freq: F...
  • Page 115 17.1.3 CS-RE28PKR CU-RE28PKR Cooling Characteristic Condition Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Piping length: 5 m Compressor Freq: F...
  • Page 116 Piping Length Characteristic Cooling Condition Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Outdoor temperature: 35°C (DBT) Compressor Freq: F...
  • Page 117 Heating Characteristic Condition Room temperature: 20°C (DBT) Operation condition: High fan speed Piping length: 5 m Compressor Freq: F...
  • Page 118 Piping Length Characteristic Heating Condition Room temperature: 20°C (DBT) Operation condition: High fan speed Outdoor temperature: 7.0°C (DBT), 6.0°C (WBT) Compressor Freq: F...

  • Page 119: Sensible Capacity Chart

    17.2 Sensible Capacity Chart INDOOR OUTDOOR TEMPERATURE (°C DB) CU-RE18PKR °C °C 51.8 4.99 3.97 1.00 4.83 3.84 1.10 4.66 3.79 1.19 4.59 3.76 1.23 54.1 5.29 3.91 1.01 5.06 3.78 1.10 4.86 3.74 1.20 4.78 3.73 1.24 50.0 5.46 3.96 1.02 5.22...
  • Page 120 INDOOR OUTDOOR TEMPERATURE (°C DB) CU-RE28PKR °C °C 51.8 7.54 5.72 1.85 7.45 5.53 2.02 7.35 5.45 2.19 7.30 5.42 2.26 54.1 7.99 5.63 1.86 7.79 5.44 2.03 7.67 5.39 2.20 7.60 5.37 2.27 50.0 8.26 5.70 1.87 8.06 5.52 2.03 7.94 5.49...

  • Page 121: Exploded View And Replacement Parts List

    18. Exploded View and Replacement Parts List 18.1 Indoor Unit 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 122 SAFETY PART NAME & DESCRIPTION QTY. CS-RE18PKR CS-RE24PKR CS-RE28PKR REMARK CHASSY COMPLETE CWD50C1623 ← ← FAN MOTOR ARW7627AC ← ← CROSS FLOW FAN COMPLETE CWH02C1077 ← ← BEARING ASS’Y CWH64K1006 ← ← SCREW - CROSS FLOW FAN CWH551146 ← ←...

  • Page 123: Outdoor Unit

    18.2 Outdoor Unit 18.2.1 CU-RE18PKR 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 124 SAFETY REF. NO. PART NAME & DESCRIPTION QTY. CU-RE18PKR REMARK BASE PAN ASS’Y CWD52K1191 ANTI - VIBRATION BUSHING CWH50077 COMPRESSOR 5RD132XFA21 NUT - COMPRESSOR MOUNT CWH56000J FAN MOTOR BRACKET CWD541126 FAN MOTOR CWA951620 SCREW - FAN MOTOR BRACKET CWH551217 SCREW - FAN MOTOR MOUNT CWH551040J PROPELLER FAN ASS’Y CWH001019...
  • Page 125 SAFETY REF. NO. PART NAME & DESCRIPTION QTY. CU-RE18PKR REMARK SHOCK ABSORBER (LEFT) CWG712880 C. C. CASE CWG565546 (Note)  All parts are supplied from PAPAMY, Malaysia (Vendor Code: 00029488).  “O” marked parts are recommended to be kept in stock.
  • Page 126 18.2.2 CU-RE24PKR 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 127 SAFETY REF. NO. PART NAME & DESCRIPTION QTY. CU-RE24PKR REMARK BASE PAN ASS’Y CWD52K1190 ANTI - VIBRATION BUSHING CWH50055 PACKING CWB81043 COMPRESSOR 5KD240XAF21 NUT - COMPRESSOR MOUNT CWH561049 FAN MOTOR BRACKET CWD541127 FAN MOTOR EHDS80C60AC SCREW - FAN MOTOR BRACKET CWH551217 SCREW - FAN MOTOR MOUNT CWH551323...
  • Page 128 SAFETY REF. NO. PART NAME & DESCRIPTION QTY. CU-RE24PKR REMARK SHOCK ABSORBER (LEFT) CWG712880 C. C. CASE CWG565546 (Note)  All parts are supplied from PAPAMY, Malaysia (Vendor Code: 00029488).  “O” marked parts are recommended to be kept in stock.
  • Page 129 18.2.3 CU-RE28PKR...
  • Page 131 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 132 SAFETY REF. NO. PART NAME & DESCRIPTION QTY. CU-RE28PKR REMARK BASE PAN ASS’Y CWD52K1295 COMPRESSOR 5KD240XAF21 ANTI - VIBRATION BUSHING CWH50055 NUT - COMPRESSOR MOUNT CWH561049 PACKING CWB811017 CRANKCASE HEATER CWA341080 CONDENSER COMPLETE CWB32C3300 SOUND PROOF MATERIAL CWG302246 DISCHARGE MUFFLER CWB121013 3 WAYS VALVE (GAS) CWB011251...
  • Page 133 SAFETY REF. NO. PART NAME & DESCRIPTION QTY. CU-RE28PKR REMARK TERMINAL BOARD ASSY CWA28K1281 RECEIVER CWB14017 CWG861239 BASE BOARD - COMPLETE CWG62C1086 SHOCK ABSORBER (RIGHT) CWG712852 SHOCK ABSORBER (LEFT) CWG712854 C. C. CASE CWG567822 (Note)  All parts are supplied from PAPAMY, Malaysia (Vendor Code: 00029488). ...

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