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Quasar HQ-2051TH Service Manual

Room air conditioner
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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 ser-
vice or repair the product or products deal with in this service information by anyone else could result in serious injury or death.
HQ-2051TH,LWC051
WARNING
© 2002 Matsushita Electric Industrial co., Ltd.
All rights reserved. Unauthorized copying and distri-
bution is violation of law.
ORDER NO. RAC0211001C1
E9

Room Air Conditioner

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Summary of Contents for Quasar HQ-2051TH

  • Page 1: Service Manual

    ORDER NO. RAC0211001C1 Service Manual Room Air Conditioner HQ-2051TH,LWC051 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 HQ-2051TH ITEMS COOLING CAPACITY (BTU/h) 5,050 POWER SUPPLY (Phase, V, Hz) 1ø, 115V, 60Hz INPUT (W) OPERATING CURRENT (AMP.)

  • Page 4: Locations Of Controls

    1.3 LOCATIONS OF CONTROLS Off— Turns air conditioner off. High Fan—High speed fan operation without cooling. Low Fan—Low speed fan operation without cooling. High Cool—Cooling with high speed fan operation. Low Cool—Cooling with low speed fan operation. This automatically controls the temperature of the indoor air. Turn the knob so that the arrow points to the larger marks for greater cooling.

  • 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: Before Installation

    Installation HARDWARE TYPE A: 11EA TYPE B: 4EA TYPE C: 3EA DRAIN PIPE (SHORT SCREW) (WOOD SCREW) (L BACKET) 10mm(2/5") 16mm(5/8") 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...

  • Page 14: How To Secure The Drain Pipe

    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

    5. 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 PART NO. DESCRIPTION & NAME Q'TY REMARKS CWL00002 POWER CORD ASSY CW468110012P FAN MOTOR CW2520ABC2JA COMPRESSOR CWL00004 ROTARY SWITCH CWL00003 THERMOSTAT CWL00005...

  • Page 23: Exploded View

    6. EXPLODED VIEW —23—...

  • Page 24: Service Parts List

    7. SERVICE PARTS LIST R: RECOMMANDABLE PARTS REF. NO DESCRIPTION & NAME Q'TY PART NO. REMARKS CONTROL BOX ASSEMBLY CWL00001 POWER CORD ASSEMBLY CWL00002 THERMOSTAT ASSEMBLY CWL00003 SWITCH,ROTARY CWL00004 CAPACITOR CWL00005 CONTROL BOX CWL00006 COVER CWL00007 CONDUCTOR ASSEMBLY CWL00008 CLAMP FOR CAPACITOR CWL00009 CONDUCTOR ASSEMBLY CWL00010...
  • Page 25 R: RECOMMANDABLE PARTS REF. NO DESCRIPTION & NAME Q'TY PART NO. REMARKS MOTOR ASSEMBLY CW468110012P SHROUD CWL00033 FAN,PROPELLER CWL00034 D-10 CONDENSER ASSEMBLY CW5403R6200C D-11 ORFICE CWL00036 D-12 DRAIN PIPE CWL00037 D-13 BRACE CWL00071 CABINET CWL00038 INSTALLATION KIT CWL00039 GUIDE CWL00040 OPERATING INSTRUCTION CW382820046C FRONT GRILLE ASSEMBLY...
  • Page 26 MEMO —26—...
  • Page 27 MEMO —27—...
  • Page 28 October, 2002 P/No.: 3828A20163J Printed in Korea...

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