CONTENTS 1. PREFACE ...................................................................................................................................................3 1.1 FEATURES.....................................................................................................................................................3 1.2 SPECIFICATIONS .........................................................................................................................................3 1.
1. PREFACE This service manual provides various service information, including the mechanical and electrical parts, etc. This room air conditioner was manufactured and assembled under a strict quality control system. The refrigerant is charged at the factory. Be sure to read the safety precautions prior to servicing the unit. 1.1 FEATURES • • • • • DESIGNED FOR COOLING ONLY POWERFUL BUILT-IN ADJUSTABLE THERMOSTAT WASHABLE ONE-TOUCH FILTER COMPACT SIZE 1.
1.3 LOCATIONS OF CONTROLS Operation Off Hi Fan O Hi Cool Lo Fan O Off : Turns air conditioner off. Hi Fan : High speed fan operation without cooling. Lo Fan : Low speed fan operation without cooling. Hi Cool : Cooling with high speed fan operation. Lo Cool : Cooling with low speed fan operation. Lo Cool Mode Thermostat This automatically controls the temperature of the indoor air. Turn the knob clockwise for greater cooling. Point the arrow counter-clockwise for more moderate cooling.
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. Push the front grille up from the bottom. Pull the top of the front grille away from the cabinet as the top tabs lift out of their slots. (See Figure 2) 4.
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 panel. (Refer to Section 2.1.3) 5. Remove 2 screws that secure the air guide upper to air guide lower. (See Figure 6) 6. Lift air guide upper upward. 7. Re-install by referring to the procedures above. Figure 7 2.2.2 ORIFICE, TURBO FAN AND FAN 1.
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 panel. (Refer to Section 2.1.3) 5. Remove the upper air guide . (Refer to Section 2.2.1) 6. Remove the compressor, turbo fan, fan and shroud. (Refer to Section 2.2.2) 7. Remove 2 screws that secure the motor to the motor mount . (See Figure 10) 8. Remove the motor. 9. Re-install by referring to the procedures above.
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, unbraze the suction and discharge pipes at the compressor connections. 5. Remove 3 nuts which fasten the compressor. 6. Remove the compressor. 7. Re-install by referring to the removal procedure above. (See Figure 14) 2.3.3 CAPACITOR 1.
Figure 18 2.3.6 POWER CORD 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 panel to base pan. (Refer to Section 2.1.3) 5. Pulls the control panel toward you. 6. Disconnect the 2 receptacles and remove the grounding screw. 7. Remove a screw securing the cord clip to the control board. 8. Pull the power cord. 9. Re-install by referring to procedures above. Figure19 2.
wise. This will keep oil from foaming and being drawn into the vacuum pump. 2.4.2 EVAPORATOR 1. Remove the cabinet. 2. Discharge the refrigerant by using a refrigerant recovery system. 3. Remove the upper air guide .(Refer to Section 2.2.1) 4. After discharging the refrigerant completely, unbraze the interconnecting tube at the evaporator connections. 5. Remove the evaporator. 6. Re-install by referring to the procedures above. 2.4.3 CAPILLARY TUBE 1. Remove the cabinet. 2.
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.
3. TROUBLESHOOTING GUIDE 3.1 OUTSIDE DIMENSIONS (unit: inches) (1 21/32") (14 9/16") (18 9/16") (1 21/32") (1 5/32") (4 3/4") (0.4 1/16") (12 1/4") (13 5/8") (1 3/32") (0.
3.2 PIPING SYSTEM CONDENSER COILS FAN MOTOR CAPILLARY TUBE TURBO FAN EVAPORATOR COILS Figure 32 is a brief description of the important components and their function in what is called the refrigeration system. This will help you to understand the refrigeration cycle and the flow of the refrigerant in the cooling cycle.
3.3 TROUBLESHOOTING GUIDE In general, possible trouble is classified in two categories. The one is called Starting Failure which is caused by an electrical defect. The other is Ineffective Air Conditioning caused by a defect in the refrigeration circuit and/or improper application. Unit is running but cooling is ineffective. Ineffective Cooling Check cold air circulation for smooth flow. Check outdoor coil (heat exchanger) and fan operation. Dirty indoor coil (heat exchanger) Check gas leakage.
Fails to Start Check circuit breaker and fuse. Check power source. Check control switch setting. Check thermostat. Check control switch. Compressor fails only to start. Fan only fails to start. Drop of power voltage. Improper thermostat setting Defect of compressor or capacitor. Loose terminal connection Capacitor check. Improper wiring Improper wiring. Defect of fan motor capacitor. Irregular motor resistance (Ω) Irregular motor insulation (Ω) Replacement. Replacement of fan motor.
ROOM AIR CONDITIONER VOLTAGE LIMITS NAME PLATE RATING MINIMUM MAXIMUM 115V ± 10% 103.5V 126.5V COMPLAINT Fan motor will not run. CAUSE REMEDY No power Check voltage at outlet. Correct if none. Power supply cord Check voltage to rotary switch. If none, check power supply cord. Replace cord if circuit is open. Rotary switch Check switch continuity. Refer to wiring diagram for terminal identification. Replace switch if defective. Wire disconnected or connection loose Connect wire.
COMPLAINT Fan motor noise. Compressor will not run, fan motor runs. CAUSE REMEDY Fan 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 replace the motor. If the motor hums or noise appears to be internal while running, replace motor. Voltage Check voltage. See the limits on the preceding page.
COMPLAINT Compressor cycles on overload. Insufficient cooling Excessive noise CAUSE REMEDY Fan motor If not running, determine the cause. Replace if required. Condenser air flow restriction Remove the cabinet, inspect the interior surface of the condenser. If restricted, clean carefully with a vacuum cleaner (do not damage fins) or brush. Clean the interior base before re-assembling.
4. CIRCUIT DIAGRAM MODEL: ZQ05C10 POWER INPUT BK(BR) WH(BL) (Plain) (Ribbed) ROTARY SWITCH 4 1 GN(GN/YL) 1 2 H BK BK 3 4 L RD RD 5 6 M BL BL 7 8 OR(BR) 2 MOTOR CAPACITOR YL YL F OR(BR) C R 3 COMP. S C BR BR BK BK RD RD BL BL 6 H 7 OLP THERMOSTAT 5 SYNC. M. 3854AR2330A WIRING DIAGRAM YL BR BR ROCKER SWITCH S: Service Parts N: Non Service Parts LOCATION NO.
5.
6. SERVICE PARTS LIST ZQ05C10 LocNo FRIEDRICH DESCRIPTION REMARK 130410 67302921 Base Assy Single R 130910 67303709 Cabinet Assy Single R 135312 67306003 Grille Assy Front R 135313 67304200 Grille Assy Inlet R 135500 67300309 Cover R 147581 67304600 Link R 147582-1 67304501 Louver Vertical 2 ea.
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MEMO —23—
Use Factory Certified Parts... FRIEDRICH AIR CONDITIONING CO. Visit our web site at www.friedrich.com Post Office Box 1540 • 4200 N. Pan Am Expressway • San Antonio, Texas 78295-1540 • (210) 357-4400 • FAX (210) 357-4490 P/NO.
