Service & Parts Manual 2005 Room Air Conditioners 50 & 60 Hz Models SH15L30-A SH20L30-A SH20L50-A HG-SVC-PRTS-05 (4-05)
TABLE OF CONTENTS PAGE Specifications ................................................................................................................................... 3 Performance Data ............................................................................................................................ 3 Component Operation & Testing ...................................................................................................... 4 Compressors .................................................
26 34 26 19800/19500 20000 SH20L50 15/16 15/16 25 15/16 17 15/16 17 15/16 SH20L50 27 3/8 27 3/8 27 3/8 9 3/16 9 3/16 9 3/16 Depth Hood to Louvers 3 1/16 3 1/16 3 1/16 Minimum Extension Into Room 10.2 10.0/10.9 7.9/8.7 Amps AHAM Dimensions (Inches) 220/240 230/208 230/208 Depth Overall 123 125 206 16 15/16 16 15/16 16 15/16 Minimum Extension Outside 2342 2200/2167 1765/1765 Watts - 196 129 27 7/8 27 7/8 27 7/8 Min. 42 42 42 Max.
COMPONENT OPERATION AND TESTING FIGURE 2 COMPRESSOR WINDING TEST WARNING DISCONNECT ELECTRICAL POWER TO THE UNIT BEFORE SERVICING OR TESTING COMPRESSORS Compressors are single phase, 208/230 volt. All compressor motors are permanent split capacitor type, using only a running capacitor across the start and run terminal. All compressors are internally spring mounted and externally mounted on rubber isolators. Line Voltage Overload The compressor is equipped with an internal line voltage overload.
GROUND TEST FAN MOTOR (Figure 4) Use an ohmmeter set on its highest scale. Touch one lead to the compressor body (clean point of contact, as a good connection is a must) and the other probe in turn to each compressor terminal. (See Figure 3.) If a reading is obtained, the compressor is grounded and must be replaced. A 230 volt single phase permanent split capacitor motor is used to drive the evaporator blower and condenser fan. A running capacitor is wired across the start and run terminals of the motor.
SYSTEM CONTROL SWITCH (Figure 6) CAPACITOR – TEST This switch is double pole, single throw. Check for continuity between terminals 2 and 3, and 5 and 6. 1. Remove the capacitor from the unit. 2. Check for visual damage such as bulges, cracks, or leaks. 3. For dual rated capacitors, apply an ohmmeter lead to the common (C) terminal and the other probe to the compressor (HERM) terminal. A satisfactory capacitor will cause a deflection on the pointer, then gradually move back to infinity. 4.
TEST Remove the wires from the thermostat. Turn the thermostat to its coldest position. Check to see if there is continuity between the two terminals. Turn the thermostat to its warmest position. Check continuity to see if the thermostat contacts open. Note: The temperature must be within the range listed to check the thermostat. Refer to the troubleshooting section in this manual for additional information on thermostat testing.
LOW AMBIENT BYPASS VALVE (Figure 9) The HazardGard unit is designed to operate at low outside ambient temperatures. This is accomplished by the use of a bypass valve installed in the refrigeration circuit. The valve is connected between the discharge line at the compressor and the suction process tube. The valve responds to suction pressure which, when reduced in the system, causes the valve to open and bypass hot gas from the high pressure side to the low pressure side of the system.
HERMETIC COMPONENT REPLACEMENT The following procedure applies when replacing components in the sealed refrigeration circuit or repairing refrigerant leaks. (Compressor, condenser, evaporator, capillary tube, refrigerant leaks, etc.) 1. Recover the refrigerant from the system at the process tube located on the high side of the system by installing a line tap on the process tube. Apply the gauge from the process tube to EPA approved gauges from the process tube to the EPA approved recovery system.
ROTARY COMPRESSOR SPECIAL TROUBLESHOOTING AND SERVICE REFRIGERANT CHARGE Basically, troubleshooting and servicing rotary compressors is the same as on the reciprocating compressor with only a few exceptions. 1. The refrigerant charge is extremely critical. Measure the charge carefully and as exactly as possible to the nameplate charge. 1. Because of the spinning motion of the rotary, the mounts are critical. If vibration is present, check the mounts carefully. 2.
TROUBLESHOOTING PROBLEM UNIT DOES NOT RUN. POSSIBLE CAUSE TO CORRECT Power disconnected. Check power source. System switch in “Off” position. Set switch correctly. Branch circuit fuse blown or circuit breaker tripped. Replace fuse, reset breaker. If repeats, check fuse or breaker size. Check for shorts in unit wiring and components. Inoperative system switch. Test for continuity. Loose or disconnected wiring Check wiring and connections. at switch. Connect per wiring diagram.
TROUBLESHOOTING (Continued) PROBLEM POSSIBLE CAUSE TO CORRECT Compressor attempts to start before system pressures are equalized. Allow a minimum of two (2) minutes to allow pressures to equalize before attempting to start. COMPRESSOR ATTEMPTS TO START, OR RUNS FOR SHORT PERIODS ONLY. Low or fluctuating voltage. Check voltage with unit operating. Check for other appliances on the circuit. Unit should be on separate circuit for proper voltage, and be fused separately. Incorrect wiring.
TROUBLESHOOTING (Continued) PROBLEM FAN MOTOR DOES NOT RUN. POSSIBLE CAUSE TO CORRECT Defective switch (On-Off). Check continuity across terminals 2 and 3. Fan capacitor open. Check by substituting a known good capacitor of the same rating. Inoperative fan motor. Direct test fan motor. Incorrect wiring of fan circuit. Connect per wiring diagram. Relay open. Replace Relay. Check for seized motor bearings. Rotate by hand, add oil, if noisy, replace. Bound fan blade or blower wheel.
WIRING DIAGRAM MODELS SH15L30-A, SH20L30-A, SH20L50-A 14
HAZARDGARD CABINET PARTS 15
HAZARDGARD CHASSIS PARTS 16
HAZARDGARD PARTS LIST MODELS ELECTRICAL PARTS 1 COMPRESSOR 61193549 1 COMPRESSOR 61193550 1 COMPRESSOR 61193565 2 MOTOR, FAN 61871426 2 MOTOR, FAN 61871427 CODE SH20L50-A PART NO# SH20L30-A DESCRIPTION SH15L30-A REF 1 600 1 600 1 1 600 110 1 110 2 MOTOR, FAN 61871450 1 110 5 SWITCH, ON-OFF DPST 60935300 1 1 1 130 * INSULATOR, ELECTRICAL 61829700 1 1 1 399 399 * RELAY, SOLID STATE 61108800 2 2 2 6 THERMOSTAT 61825502 1 1 1 120 7 CAPACITOR 20/7.
HAZARDGARD PARTS LIST CHASSIS PARTS 26 MODELS SHROUD, CONDENSER 61803601 26 SHROUD, CONDENSER 61804901 27 BRACE, COND.SHROUD 61802600 3 22 FAN BLADE, COND. 60542003 1 22 FAN BLADE, COND. 60542004 23 BLOWER WHEEL, EVAP. 60610616 23 BLOWER WHEEL, EVAP.
Use Factory Certified Parts. FRIEDRICH AIR CONDITIONING CO. Post Office Box 1540 · San Antonio, Texas 78295-1540 4200 N. Pan Am Expressway · San Antonio, Texas 78218-5212 (210) 357-4400 · FAX (210) 357-4480 www.friedrich.com Printed in the U.S.A.
