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www.zenithappliances.com Room Air Conditioner SERVICE MANUAL MODEL : LW601 ER CAUTION • BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. • ONLY FOR AUTHORIZED SERVICE PERSONNEL.
1.3 LOCATIONS OF CONTROLS Operation - Turns air conditioner off. High High High Fan - High speed fan operation without cooling. Cool - Low speed fan operation without cooling. Low Fan High Cool - Cooling with high speed fan operation. Cool Low Cool - Cooling with low speed fan operation.
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) 。...
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.
2.2.3 MOTOR 1. Disconnect the unit from the power source. Figure 10 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.
2.3.2 COMPRESSOR 1. Remove the front grille and cabinet. Figure 14 (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.
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.
wise. This will keep oil from foaming and being 2.4.2 EVAPORATOR 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.
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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...
3. INSTALLATION This air conditioner is designed with a b utton-down chassis so it can be easily installed in a window. 3.1 SELECT THE BEST LOCATION 1. To prevent vibr ation and noise , make sure the unit is installed securely and firmly. 2.
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Installation HARDWARE TYPE A: 11EA TYPE B: 4EA TYPE C: 3EA (SHORT SCREW) (WOOD SCREW) (L BACKET) TYPE D: 1EA TYPE E: 1EA TYPE F: 2EA (SEAL STRIP) (SASH SEAL) (GUIDE PANEL) (Adhesive backed) (Not adhesive backed) 3.2.2 BEFORE INSTALLATION 1.
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3. INSTALL THE AIR CONDITIONER IN THE WINDOW INNER SILL a. Carefully lift the air conditioner and slide it into the TYPE A OUTER SILL INSIDE open window. Make sure the bottom guide of the air CENTER LINE conditioner drops into the notches of the L bracket.
REMOVAL FROM WINDOW Turn the air conditioner off, disconnect the power cord, remove the L bracket and the screws installed through the top and bot- tom of the guide panels , and sa ve for reinstallation later . Close the guide panels . Keeping a fir m grip on the air conditioner , raise the sash, and carefully tilt the air conditioner bac kward, draining any condensate w ater.
4.2 PIPING SYSTEM CONDENSER COILS 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. ROOM AIR CONDITIONER CYCLE OF REFRIGERATION EVAPORATOR COILS...
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.
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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.
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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.
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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.
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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.