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17
Trouble Shooting Guide
SYMPTOM
POSSIBLE CAUSE
PROCEDURE
Unit doesn't run
1. No power to unit
1. Plug in unit
2. Temperature control turned off
2. Check temperature control
3. Temperature control faulty
3. Test temperature control
4. Compressor overheated
4. Clean condenser coil
5. Condenser fan faulty
5. Service condenser fan
6. Overload protector faulty
6. Test overload
7. Compressor relay faulty
7. Test relay
8. Compressor faulty
8. Call ASA for service
Unit short cycles
1. Condenser coil dirty
1. Clean coil
2. Condenser fan faulty
2. Service fan and motor.
3. Compressor faulty
3. Call ASA for service
4. Overload repeatedly tripping
4. Check outlet voltage
Unit runs constantly
1. Frost build-up
1. Defrost evaporator
2. Door not sealing properly
3. Door not closing
2. Check door seal & roller bearing
3. Check door spring
4. Door gasket damaged
4. Replace door gasket
5. Condenser coil dirty
5. Clean coil
6. Condenser fan faulty
7. Refrigerant leak
6. Service condenser motor
7. Call ASA for service
Unit not cold enough
1. Temperature control set too
high
1. Adjust control to lower setting
2. Temperature control faulty
2. Test control
3. Condenser coil dirty
3. Clean coil
4. Door not sealing properly
4. Check door seal
5. Door gasket damaged
5. Replace door gasket
6. Evaporator fan faulty
6. Service evaporator fan
7. Evaporator iced up
7. Door not sealing
8. Refrigerant leaking
8. Call ASA for service
Unit too cold
1. Temperature control set too low
1. Adjust control to raise setting
2. Temperature control faulty
2. Test control
Ice in drain pan or
water in bottom of
unit or floor
1. Drain tube clogged
2. Unit not level
1. Clean drain
2. Level unit
Unit noisy
1. Unit not level
1. Adjust leveling leg/shim casters
2. Compressor mountings loose or
hardened.
2. Tighten or replace compressor
mountings
3. Condenser fan damaged or
hitting fan shroud
3. Inspect condenser fan
4. Evaporator fan damaged or
hitting fan shroud
4. Inspect evaporator fan