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TROUBLESHOOTING GUIDE
The following steps and procedures are recommended for correcting the problems indicated. Service,
other than routine maintenance, should be performed only by a qualified refrigeration serviceman.
PROBLEM: THE ENTIRE UNIT DOES NOT RUN.
1. CAUSE: POWER INTERRUPTION
REMEDY: Check external power supply. Look for blown fuses or tripped circuit breakers. Reset or
replace if needed.
2. (REASON) THERMOSTAT INOPERABLE.
REMEDY: Setting may be too high or to low; check and reset. Thermostat may be out of calibration or
otherwise defective...remove and replace.
3. (CAUSE) POWER MODULE:
(REMEDY) Correct as follows: (a) Replace;
PROBLEM: EVAPORATOR FAN RUNS BUT COMPRESSOR AND CONDENSER FAN DO NOT
START
1. (REASON) Low Voltage.
(FIXING) Check power supply for voltage outside the range of 106-126 volts on the 115volt unit and
187-253 volts on the 208/230 volt unit.
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2. (CAUSE) Thermostat
(REMEDY) Examine the control unit for loose display cable and tighten.
3. (REASON) High Pressure Control cutting turning unit off
(FIXING) Depress high pressure switch red button, check for loose wire connections, broken or burned
contacts. If switch is defective, replace.
4. (CAUSE) Defective Power Module. (CURE) Replace
5. (REASON) Refrigerant leak-no freon. (REMEDY) Locate leak and repair. Evacuate unit and recharge.
6. (CAUSE) Loose or defective wires. (FIXING) Tug on wires to see if they will separate from
connections.
7. (REASON) Defective compressor (REMEDY) Check for shorts, opens and grounds. Remove and
replace compressor.
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