Panasonic CS-PW18GKX Service Manual
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TABLE OF CONTENTS

1 Safety Precautions----------------------------------------------- 3
2 Specifications ----------------------------------------------------- 5
3 Features ------------------------------------------------------------- 8
4.1. Indoor Unit--------------------------------------------------- 9
4.2. Outdoor Unit ------------------------------------------------ 9
4.3. Remote Control -------------------------------------------- 9
5 Dimensions--------------------------------------------------------10
5.1. Indoor Unit & Remote Control -------------------------10
5.2. Outdoor Unit ----------------------------------------------- 11
6 Refrigeration Cycle Diagram --------------------------------12
7 Block Diagram----------------------------------------------------13
8 Wiring Connection Diagram ---------------------------------14
9 Electronic Circuit Diagram -----------------------------------15
9.1. Indoor Unit--------------------------------------------------15
9.2. Outdoor Unit -----------------------------------------------15
10 Printed Circuit Board-------------------------------------------16
CS-PW18GKX CU-PW18GKX
P
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10.1. Indoor Unit ------------------------------------------------- 16
10.2. Outdoor Unit----------------------------------------------- 17
10.3. Indicator & Receiver------------------------------------- 17
11 Installation Instruction ---------------------------------------- 18
11.1. Select The Best Location ------------------------------ 18
11.3. Indoor Unit ------------------------------------------------- 19
11.4. Outdoor Unit----------------------------------------------- 22
12 Operation Control----------------------------------------------- 24
12.1. Heating Operation --------------------------------------- 24
12.2. Cooling Operation---------------------------------------- 25
12.3. Soft Dry Operation --------------------------------------- 26
12.4. Automatic Operation ------------------------------------ 27
12.5. Indoor Fan Speed Control ----------------------------- 28
12.6. Outdoor Fan Speed Control --------------------------- 30
12.8. Timer Control---------------------------------------------- 31
© Panasonic HA Air-Conditioning (M) Sdn. Bhd. 2008.
Unauthorized copying and distribution is a violation of
law.
Order No. PHAAM0812111C2
Air Conditioner
P
A
G
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Summary of Contents for Panasonic CS-PW18GKX

  • Page 1: Table Of Contents

    12.6. Outdoor Fan Speed Control --------------------------- 30 9.2. Outdoor Unit -----------------------------------------------15 12.7. Vertical Airflow Direction Control --------------------- 30 10 Printed Circuit Board-------------------------------------------16 12.8. Timer Control---------------------------------------------- 31 © Panasonic HA Air-Conditioning (M) Sdn. Bhd. 2008. Unauthorized copying and distribution is a violation of law.
  • Page 2 12.9. Random Auto Restart Control------------------------- 31 12.10. Remote Control Signal Receiving Sound ---------- 31 13 Protection Control ---------------------------------------------- 32 13.1. Restart Control (Time Delay Safety Control) ------ 32 13.2. 60 Seconds Forced Operation ------------------------ 32 13.3. 7 Minutes Time Save Control ------------------------- 32 13.4.
  • 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. After completion of installation or service, confirm there is no leakage or refrigerant gas. It may generate toxic gas when the refrigerant contacts with fire. 21. Ventilate if there is refrigerant gas leakage during operation. It may cause toxic gas when refrigerant contacts with fire. 22.
  • Page 5: Specifications

    2 Specifications INDOOR CS-PW18GKX MODEL OUTDOOR CU-PW18GKX Performance Test Condition EUROVENT Phase, Hz Single, 50 Power Supply 5.10 Capacity BTU/h 17400 kJ/h — Running Current Input Power 1750 Annual Consumption — BTU/hW 9.94 Power Factor dB-A High : 45 Low : 38...
  • Page 6 Type Propeller Fan Material PP Resin Motor Type Induction (6-poles) Input Power 74.1 Output Power — Speed Moisture Removal L/h (Pt/h) 2.9 (6.1) Cool 13.1 (463) /min (ft /min) Heat 14.0 (494) /min (ft /min) Cool 15.1 (533) /min (ft /min) Heat 15.1 (533)
  • Page 7 Cooling Maximum Minimum Outdoor Operation Range Heating Maximum Minimum 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.
  • Page 8: Features

    3 Features • High efficiency. • Serviceability Improvement • Compact design. - Removable and washable Front Panel. • Wider range of horizontal discharge air. • Air filter with function to reduce dust and smoke. • Environmental Protection • Automatic air swing and manual adjusted by Remote Control - Non-ozone depletion substances refrigerant (R410A) for vertical airflow.
  • Page 9: Location Of Controls And Components

    4 Location of Controls and Components 4.1. Indoor Unit 4.2. Outdoor Unit 4.3. Remote Control...
  • Page 10: Dimensions

    5 Dimensions 5.1. Indoor Unit & Remote Control...
  • Page 11: Outdoor Unit

    5.2. Outdoor Unit...
  • Page 12: Refrigeration Cycle Diagram

    6 Refrigeration Cycle Diagram...
  • Page 13: Block Diagram

    7 Block Diagram...
  • Page 14: Wiring Connection Diagram

    8 Wiring Connection Diagram...
  • Page 15: Electronic Circuit Diagram

    9 Electronic Circuit Diagram 9.1. Indoor Unit 9.2. Outdoor Unit...
  • Page 16: Printed Circuit Board

    10 Printed Circuit Board 10.1. Indoor Unit...
  • Page 17: Outdoor Unit

    10.2. Outdoor Unit 10.3. Indicator & Receiver...
  • Page 18: Installation Instruction

    11 Installation Instruction 11.1. Select The Best Location 11.2. Indoor/Outdoor Unit INDOOR UNIT • Do not install the unit in excessive oil fume area such as Installation Diagram kitchen, workshop and etc. • There should not be any heat source or steam near the unit. •...
  • Page 19: Indoor Unit

    11.3. Indoor Unit 11.3.2. TO DRILL A HOLE IN THE WALL INSTALL SLEEVE 11.3.1. HOW TO FIX INSTALLATION PLATE PIPING The mounting wall is strong and solid enough to prevent it from 1. Insert the piping sleeve to the hole. the vibration.
  • Page 20 3. For the embedded piping (This can be used for left rear piping & left bottom piping also.)
  • Page 21 11.3.4. CONNECT THE CABLE TO THE INDOOR UNIT 1. The connecting cable can be connected without removing the front grille. 2. Connecting cable between indoor unit and outdoor unit shall be approved polychloroprene sheathed 5 x 1.5 mm (PW18), 5 x 2.5 mm (PW24) flexible cord, type designa- tion 245 IEC 57 or heavier cord.
  • Page 22: Outdoor Unit

    11.4. Outdoor Unit 11.4.1. 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.
  • Page 23: Evacuation Of The Equipment

    11.4.3. 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. •...
  • Page 24: Operation Control

    12 Operation Control 12.1. Heating Operation • Heating operation can be set using remote control. • This operation is applied to warm the room temperature reaches the setting temperature set on the remote control. • The remote control setting temperature, which takes the reading of intake air temperature sensor, can be adjusted from 16°C to 30°C.
  • Page 25: Cooling Operation

    12.2. Cooling Operation • Cooling operation can be set using remote control. • This operation is applied to cool down the room temperature reaches the setting temperature set on the remote control. • The remote control setting temperature, which takes the reading of intake air temperature sensor, can be adjusted from 16°C to 30°C.
  • Page 26: Soft Dry Operation

    12.3. Soft Dry Operation • Soft Dry operation can be set using remote control. • Soft Dry operation is applied to dehumidify and to perform a gentle cooling to the room. • This operation starts when the intake air temperature sensor reaches the setting temperature on the remote control. •...
  • Page 27: Automatic Operation

    12.4. Automatic Operation • Automatic operation can be set using remote control. • This operation starts to operate with indoor fan at SLo speed for 25 seconds to judge the intake air temperature. • After judged the temperature, the operation mode is determined by referring to the below standard. •...
  • Page 28: Indoor Fan Speed Control

    12.5. Indoor Fan Speed Control • Indoor Fan Speed can be set using remote control. 12.5.1. Fan Speed Rotation Chart Speed CS-PW18GKX Cool, Dry Heat S Hi 1490 1470 1370 1270 1190 S Lo S Lo SS Lo Q SHi Q Hi —...
  • Page 29 • Auto Fan Speed during Soft Dry operation: 1. Indoor fan will rotate alternately between off and Lo-. 2. At the beginning of each compressor start operation, indoor fan will increase fan speed gradually for deodorizing purpose. 3. When compressor at turn off condition for 6 minutes, indoor fan will start fan speed at Lo- to circulate the air in the room. This is to obtain the actual reading of intake air temperature.
  • Page 30: Outdoor Fan Speed Control

    12.6. Outdoor Fan Speed Control • There is only one speed for outdoor fan motor. • When the air conditioner is turned on, the compressor and the outdoor fan will operate simultaneously. • Likewise, both compressor and outdoor fan will stop at the same time if the unit is turned off. 12.7.
  • Page 31: Timer Control

    12.8. Timer Control • There are 2 types of timer, ON and OFF timer. • Both ON and OFF timer can be set by pressing ON or OFF button respectively. • By pressing ON/OFF operation button, ON Timer or OFF Timer will not be cancelled. •...
  • Page 32: Protection Control

    13 Protection Control (For 11.5.1 to 11.5.7 information applies only to Cooling and Soft Dry Operation) 13.1. Restart Control (Time Delay Safety Control) • When the thermo-off temperature (temperature which compressor stops to operate) is reached during:- - Cooling operation - the compressor stops for 3 minutes (minimum) before resume operation. - Soft Dry operation - the compressor stops for 6 minutes (minimum) before resume operation.
  • Page 33: Compressor Reverse Rotation Protection Control

    13.5. Compressor Reverse Rotation Protection Control • If the compressor is operating continuously for 5 minutes or longer and the temperature difference between intake air and indoor heat exchanger is 2.5°C (cooling mode) or less for continuous 2 minutes, compressor will stop and restart automatically. •...
  • Page 34: Overload Protection Control

    13.10. Overload Protection Control • Outdoor Fan Control - If the temperature of the Outdoor Heat Exchanger less than -3°C, Outdoor Fan is ON. The Outdoor Fan stop, when Outdoor Heat Exchanger temperature is T or more according to Outdoor Air Temperature region as table below: The Outdoor Fan restarts when the indoor heat exchanger temperature falls to 49°C.
  • Page 35: Cold Draft Prevention Control

    13.13. Cold Draft Prevention Control 13.14. Deice Control Deice starts to prevent frosting at outdoor heat exchanger. • Normal Deice Deice operations detection commences in Heating operation starts or 60 minutes after previous deice operation. If the outdoor piping temperature drops to -4°C for 50 sec. continuously during compressor is in operation, deice will start. (There is no detection during Outdoor Fan stops.) •...
  • Page 36 a) Normal Deice Time Diagram b) Overload Deice Time Diagram...
  • Page 37: Servicing Mode

    14 Servicing Mode 14.1. Auto OFF/ON Button • The “Auto OFF/ON Button” (behind the front grille) is used to operate the air conditioner if remote control is misplaced or mulfunctioning. • Forced cooling operation is possible by pressing the “Auto OFF/ON Button” for more than 5s where “beep” sound is heard then release the button.
  • Page 38: 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 39: 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 air conditoner Low Pressure High Pressure Electric current Low Pressure High Pressure Electric current during operation during operation Insufficient refrigerant (gas leakage) Clogged capillary tube or Strainer...
  • Page 40: Disassembly And Assembly Instructions

    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 and Control Board Removal Procedures 16.1.1.
  • Page 42 16.1.3. To remove Discharge Grille...
  • Page 43 16.1.4. To remove Control Board 16.1.5. To remove Cross Flow Fan and Indoor Fan Motor...
  • Page 46: Technical Data

    17 Technical Data 17.1. Thermostat Characteristics...
  • Page 47: Sensible Capacity Chart

    17.2. Sensible Capacity Chart 230V Outdoor Temp. (°C) Indoor wet bulb temp. 17.0°C 5.06 3.83 1.60 4.73 3.68 1.72 4.40 3.53 1.84 4.00 3.36 1.99 19.0°C 5.10 1.75 19.5°C 5.55 4.02 1.63 5.19 3.86 1.676 4.83 3.71 1.88 4.39 3.53 2.03 22.0°C 6.05...
  • Page 48: Operation Characteristics

    17.3. Operation Characteristics...
  • Page 52: 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 53 REF NO. PART NAME & DESCRIPTION QTY. CS-PW18GKX CHASSY COMPLETE CWD50C1394 FAN MOTOR, DC 30W 3PH L6CBYYYL0011 CROSS FLOW FAN COMPLETE CWH02C1081 SCREW - CROSS FLOW FAN CWH551146 BEARING ASS’Y CWH64K007 EVAPORATOR CWB30C2176 FLARE NUT (1/4) CWT251030 FLARE NUT (1/2) (5/8)
  • Page 54: Outdoor Unit

    18.2. Outdoor 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 55 REF. NO. PART NAME & DESCRIPTION QTY. CU-PW18GKX CHASSY ASSY CWD50K2074 ANTI-VIBRATION BUSHING CWH50055 COMPRESSOR 5KS205DAE01 NUT-COMPRESSOR MOUNT CWH561049 SOUND PROOF MATERIAL CWG302253 FAN MOTOR BRACKET CWD541030 FAN MOTOR CWA951117J SCREW - FAN MOTOR BRACKET CWH551217 SCREW - FAN MOTOR MOUNT CWH55406J PROPELLER FAN ASSY CWH03K1006...

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