Randell 9215-32-7 Operator's Manual page 18

SYMPTOM
Unit does not run 1.
2.
3.
4.
5.
6.
7.
8.
9.
Unit short cycles 1.
2.
3.
4.
Unit runs constantly 1.
2.
3.
4.
5.
6.
7.
Unit not cold enough 1.
2.
3.
4.
5.
6.
7.
8.
9.
10. Evaporator iced up
Unit too cold 1.
2.
Unit noisy 1.
2.
3.
4.
Unit does not defrost 1.
2.
3.
18 888-994-7636
Trouble Shooting Guide
POSSIBLE CAUSE
No power to unit
Power switch in OFF position
Temperature control turned off
Temperature control faulty
Compressor overheated
Condenser fan faulty
Overload protector faulty
Compressor relay faulty
Compressor faulty
Condenser coil dirty
Condenser fan faulty
Compressor faulty
Overload repeatedly tripping
Condenser coil dirty
Condenser fan faulty
Room ambient too high
Room humidity too high
Frost builduip
Door gasket damaged
Poor door seal
Temperature control set too
high
Temperature control faulty
Condenser coil dirty
Refrigerant leaking or
contaminated
Room ambient too high
Room humidity too high
Door gasket damaged
Poor door seal
Evaporator fan faulty
Temperature control set too low
Temperature control faulty
Compressor mountings loose
or hardened
Condenser fan damaged or
hitting fan shroud
Unit not level
Evaporator fan damaged or
hitting fan shroud
Defrost heater faulty
Defrost Therm-O-Disc faulty
Defrost timer faulty
PROCEDURE
1. Plug in unit
2. Switch power switch to ON
3. Check temperature control
4. Test temperature control
5. Clean condenser coil
6. Service condenser fan
7. Test overload
8. Test relay
9. Call for service at 888-994-7636
1. Clean coil
2. Service fan and motor
3. Call for service at 888-994-7636
4. Check outlet voltage
1. Clean coil
2. Service condenser motor
3. Reduce room temperature
4. Set room lower
5. Defrost evaporator
6. Replace door gasket
7. Check door seal
1. Adjust control to lower setting
2. Test control
3. Clean coil
4. Call for service at 888-944-7636
5. Reduce room temperature
6. Set room lower
7. Replace door gasket
8. Check door seal
9. Service evaporator fan
10. Defrost evaporator
Test defrost timer
Test Therm-O-Disc
Test defrost timer
1. Adjust control to raise setting
2. Test control
1. Tighten or replace compressor
mountings
2. Inspect condenser fan
3. Adjust leveling feet
4. Inspect evaporator fan
1. Test heater
2. Test Therm-O-Disc
3. Test timer