4 OM-20000 SERIES LOW PROFILE EQUIPMENT TABLES
Unified Brands believes strongly in the products it manufactures and backs those
products with one of the best warranties in the industry. We believe with the
proper maintenance and use, you will realize a profitable return on your investment
and years of satisfied service.
REPLACEMENT PARTS
To order parts, contact your Authorized Service Agent. Supply the model
designation, serial number, part description, part number, quantity, and when
applicable, voltage and phase.
CONTACT US
If you have questions pertaining to the content in this manual, contact Unified
Brands at 888-994-7636 or tsrandell@unifiedbrands.net.
TROUBLESHOOTING
This unit is designed to operate smoothly and efficiently if properly maintained.
However, the following is a list of checks to make in the event of a problem. Wir-
ing diagrams are found at the end of this manual. When in doubt, turn unit off
and call for service at 888-994-7636 or tsrandell@unifiedbrands.net.
SYMPTOM POSSIBLE CAUSE PROCEDURE
Unit does not run
1. No power to unit
2. Power switch in OFF
position
3. Temperature control
turned off
4. Temperature control
faulty
5. Compressor overheated
6. Condenser fan faulty
7. Overload protector
faulty
8. Compressor relay faulty
9. Compressor faulty
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
Unit short cycles
1. Condenser coil dirty
2. Condenser fan faulty
3. Compressor faulty
4. Overload repeatedly
tripping
1. Clean coil
2. Service fan and motor
3. Call for service at 888-
994-7636
4. Check outlet voltage
Unit runs constantly
1. Condenser coil dirty
2. Condenser fan faulty
3. Room ambient too high
4. Room humidity too high
5. Frost build up
6. Door gasket damaged
7. Poor door seal
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
Unit not cold enough
1. Temperature control set
too high
2. Temperature control
faulty
3. Condenser coil dirty
4. Refrigerant leaking or
contaminated
5. Room ambient too high
6. Room humidity too high
7. Door gasket damaged
8. Poor door seal
9. Evaporator fan faulty
10. Evaporator iced up
1. Adjust control to lower
setting
2. Test control
3. Clean coil
4. Call for service at 888-
994-7636
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
Unit too cold
1. Temperature control set
too low
2. Temperature control
faulty
1. Adjust control to raise
setting
2. Test control
Unit noisy
1. Compressor mountings
loose or hardened
2. Condenser fan
damaged or hitting fan
shroud
3. Unit not level
4. Evaporator fan
damaged or hitting fan
shroud
1. Tighten or replace
compressor mountings
2. Inspect condenser fan
3. Adjust leveling feet
4. Inspect evaporator fan
Unit does not defrost
1. Defrost heater faulty
2. Defrost Therm-O-Disc
faulty
3. Defrost timer faulty
1. Test heater
2. Test Therm-O-Disc
3. Test timer
Moisture around
door or frame
1. Breaker strip faulty
2. Frame heater faulty
3. Temperature control set
too low
1. Inspect strips
2. Call for service at 888-
994-7636
3. Adjust control to raise
setting
Ice in drain pain or
water in bottom of
unit or floor
1. Drain tube clogged
2. Unit not level
1. Clean drain
2. Adjust leveling feet
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