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Panasonic CW-C51GU Service Manual

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Service Manual
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 deal with in this service information by anyone else could result in serious injury or death.
WARNING
R
ORDER NO. RAC0111066C1
E 9
Room Air Conditioner
CW-C51GU
CW-C61GU
© 2002 Matsushita Electric Industrial co., Ltd.
All rights reserved. Unauthorized copying and
distribution is violation of law.
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  • Page 1 ORDER NO. RAC0111066C1 Service Manual Room Air Conditioner CW-C51GU CW-C61GU WARNING 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.

  • Page 2: Table Of Contents

    CONTENTS 1. PREFACE ..............................3 1.1 FEATURES..............................3 1.2 SPECIFICATIONS ............................3 1.3 LOCATIONS OF CONTROLS ........................4 1.4 SAFETY PRECAUTIONS ..........................4 1.5 INSULATION RESISTANCE TEST ........................4 2. DISASSEMBLY INSTRUCTIONS ....................5 2.1 MECHANICAL PARTS ..........................5 2.1.1 FRONT GRILLE ............................5 2.1.2 CABINET..............................5 2.1.3 CONTROL BOARD ..........................5 2.2 AIR HANDLING PARTS ..........................6 2.2.1 AIR GUIDE UPPER ..........................6 2.2.2 ORIFICE, TURBO FAN AND FAN ......................6...

  • Page 3: Preface

    • DESIGNED FOR COOLING ONLY • POWERFUL AND INCREDIBLE COOLING • BUILT-IN ADJUSTABLE THERMOSTAT • WASHABLE ONE-TOUCH FILTER • COMPACT SIZE 1.2 SPECIFICATIONS MODELS CW-C51GU CW-C61GU ITEMS COOLING CAPACITY (BTU/h) 5,250 6,000 POWER SUPPLY (Phase, V, Hz) 1ø, 115V, 60HZ INPUT (W) OPERATING CURRENT (AMP.)

  • Page 4: Locations Of Controls

    1.3 LOCATIONS OF CONTROLS — Turns air conditioner off. High Fan — High speed fan operation COOL without cooling. HIGH HIGH Low Fan — Low speed fan operation without cooling. High Cool — Cooling with high speed fan operation. Low Cool —...

  • Page 5: Disassembly Instructions

    2. DISASSEMBLY INSTRUCTIONS 2.1 MECHANICAL PARTS 2.1.1 FRONT GRILLE Figure 1 1. Disconnect the unit from source of power. 2. Remove the two knobs by pulling them off. Using a screwdriver, remove the screw that secures the front grille to control board. (See Figure 1) 3.

  • Page 6: Air Handling Parts

    2.2 AIR HANDLING PARTS Figure 6 2.2.1 AIR GUIDE UPPER 1. Disconnect the unit from the power source. 2. Remove the front grille. (Refer to Section 2.1.1) 3. Remove the cabinet. (Refer to Section 2.1.2) 4. Remove the control board. (Refer to Section 2.1.3) 5.

  • Page 7: Motor

    2.2.3 MOTOR Figure 10 1. Disconnect the unit from the power source. 2. Remove the front grille. (Refer to Section 2.1.1) 3. Remove the cabinet. (Refer to Section 2.1.2) 4. Remove the control board. (Refer to Section 2.1.3) 5. Remove the air guide upper. (Refer to Section 2.2.1) 6.

  • Page 8: Compressor

    2.3.2 COMPRESSOR Figure 14 1. Remove the front grille and cabinet. (Refer to Section 2.1) 2. Discharge the refrigerant by using a refrigerant recovery system. 3. Remove the overload protector. (Refer to Section 2.3.1) 4. After discharging the unit completely, unbrace the suction and discharge pipes at the compressor connections.

  • Page 9: Power Cord

    2.3.6 POWER CORD Figure 18 1. Disconnect the unit from source of power. 2. Remove the front grille. (Refer to Section 2.1.1) 3. Remove the cabinet. (Refer to Section 2.1.2) 4. Remove a screw that secures control board to base pan. (Refer to Section 2.1.3) 5.

  • Page 10: Evaporator

    2.4.2 EVAPORATOR wise. This will keep oil from foaming and being drawn into the vacuum pump. 1. Remove the cabinet. 2. Discharge the refrigerant by using a refrigerant 6-3. Operate the vacuum pump for 20 to 30 min- recovery system. utes, until 600 micron vacuum is obtained.
  • Page 11 Equipment needed: Vacuum pump, charging cylinder, manifold gauge, brazing equipment, pinch-off tool capable of making a vapor proof seal, leak detector, tubing cutter, hand tools to remove components and service valve. COMPOUND GAUGE MANIFOLD GAUGE CONDENSER SEE INSETS (HIGH PRESSURE SIDE) BELOW COMPRESSOR EVAPORATOR...

  • Page 12: Installation

    3. INSTALLATION This air conditioner is designed with a button-down chassis so it can be easily installed in a window. 3.1 SELECT THE BEST LOCATION 1. To prevent vibration and noise, make sure the unit is installed securely and firmly. 2.
  • Page 13 Installation HARDWARE TYPE A: 11EA TYPE B: 4EA TYPE C: 3EA DRAIN PIPE (SHORT SCREW) (WOOD SCREW) (L BACKET) TYPE D: 1EA TYPE E: 1EA TYPE F: 2EA TYPE G: 1EA (SEAL STRIP) (SASH SEAL) (GUIDE PANEL) (SUPPORT BRACKET) (Adhesive backed) (Not adhesive backed) 3.2.2 BEFORE INSTALLATION 1.
  • Page 14 3. INSTALL THE AIR CONDITIONER IN THE WINDOW INNER SILL TYPE A a. Carefully lift the air conditioner and slide it into the OUTER SILL INSIDE open window. Make sure the bottom guide of the air CENTER LINE conditioner drops into the notches of the L bracket.

  • Page 15: Electrical Data

    REMOVAL FROM WINDOW Turn the air conditioner off, disconnect the power cord, remove the Support Bracket, L bracket and the screws installed through the top and bottom of the guide panels, and save for reinstallation later. Close the guide panels. Keeping a firm grip on the air conditioner, raise the sash, and carefully tilt the air conditioner backward, draining any condensate.

  • Page 16: Piping System

    4.2 PIPING SYSTEM CONDENSER COILS MOTOR CAPILLARY TUBE TURBO FAN EVAPORATOR COILS Following is a brief description of the important components and their function in what is called the refrigeration system. Reference should be made to Figure 34 to follow the refrigerating cycle and the flow of the refrigerant in the cooling cycle.

  • Page 17: Troubleshooting Guide

    4.3 TROUBLESHOOTING GUIDE In general, possible trouble is classified in two kinds. The one is called Starting Failure which is caused by an electrical defect. The other is Ineffective Air Con- ditioning caused by a defect in the refrigeration circuit and improper application. Unit is running but cooling is ineffective.
  • Page 18 Fails to Start Check of circuit breaker Check of power source. and fuse. Check of control switch Gas leakage of feeler setting. bulb of thermostat. Check control switch. Compressor fails only to Fan only fails to start. start. Improper wiring. Improper thermostat Drop of power voltage.
  • Page 19 ROOM AIR CONDITIONER VOLTAGE LIMITS NAME PLATE RATING MINIMUM MAXIMUM 115V ± 10% 103.5V 126.5V COMPLAINT CAUSE REMEDY Fan motor will not run. No power Check voltage at outlet. Correct if none. Power supply cord Check voltage to rotary switch. If none, check power supply cord.
  • Page 20 COMPLAINT CAUSE REMEDY Fan motor noise. If cracked, out of balance, or partially missing, replace it. Blower If cracked, out of balance, or partially missing, replace it. Loose set screw Tighten it. Worn bearings If knocking sounds continue when running or loose, replace the motor.
  • Page 21 COMPLAINT CAUSE REMEDY Compressor cycles on Fan motor If not running, determine the cause. Replace if overload. required. Condenser air flow Remove the cabinet, inspect the interior surface restriction of the condenser. If restricted, clean carefully with a vacuum cleaner (do not damage fins) or brush.

  • Page 22: Circuit Diagram

    POWER INPUT BK(BR) WH(BL) (Plain) (Ribbed) ROTARY SWITCH GN(GN/YL) OR(BR) MOTOR CAPACITOR OR(BR) COMP. THERMOSTAT WIRING DIAGRAM REF. NO CW-C51GU CW-C61GU DESCRIPTION & NAME Q'TY REMARKS CWL00002 CWL00002 POWER CORD ASSY CWL00056 CWL00069 FAN MOTOR CWL00014 CWL00062 COMPRESSOR CWL00004 CWL00004...

  • Page 23: Exploded View

    6. EXPLODED VIEW —23—...

  • Page 24: Service Parts List

    7. SERVICE PARTS LIST REF. NO DESCRIPTION & NAME Q'TY CW-C51GU CW-C61GU REMARKS CONTROL BOX ASSEMBLY CWL00001 CWL00001 POWER CORD ASSEMBLY CWL00002 CWL00002 THERMOSTAT ASSEMBLY CWL00003 CWL00003 SWITCH,ROTARY CWL00004 CWL00004 CAPACITOR CWL00005 CWL00005 CONTROL BOX CWL00006 CWL00006 COVER CWL00007 CWL00007...
  • Page 25 REF. NO DESCRIPTION & NAME Q'TY CW-C51GU CW-C61GU REMARKS MOTOR ASSEMBLY CWL00056 CWL00069 SHROUD CWL00057 CWL00033 FAN,PROPELLER CWL00058 CWL00034 D-10 CONDENSER ASSEMBLY CWL00059 CWL00035 D-11 ORFICE CWL00036 CWL00036 D-12 DRAIN PIPE CWL00037 CWL00037 D-13 BRACE CWL00071 CWL00071 CABINET CWL00038 CWL00038...
  • Page 26 MEMO —26—...
  • Page 27 February, 2002 P/No.: 3828A20140F Printed in Korea...

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