Troubleshooting Extended - U-Line ULN-CO29B-03A User Manual & Service Manual

USER GUIDE
SAFETY • INSTALLATION & INTEGRATION • OPERATING INSTRUCTIONS • MAINTENANCE •
Troubleshooting - Extended
!
CAUTION
Never attempt to repair or perform maintenance
on the unit until the main electrical power has
been disconnected from the unit.
TROUBLESHOOTING GUIDE
Concern Potential Causes
Not Cooling Compressor overheating
Compressor not operating
Compressor operating - no cooling
Evaporator fan not operating
Frozen Product Control set too cold
Thermistor failure
Frost Buildup Door Ajar or Restricted from Closing
Inside Unit
Evaporator fan not operating
Thermistor failure
Noisy Refrigeration tubing touching cabinet
Fan blade obstruction (wiring, foam
insulation, packaging material)
Suggested Remedy
Verify proper air flow through condenser. Is condenser clean?
Confirm condenser fan operation.
Confirm proper compressor operating voltage.
Confirm proper compressor operating voltage.
Test overload and relay, replace as needed.
Refer to System Diagnosis Guide.
Test fan.
Adjust Set Point Temp accordingly.
OHM thermistor.
Check door clearance to adjoining cabinetry. Check distribution of
product in unit.
Test fan.
OHM thermistor.
Carefully reposition tubing.
Remove obstruction.
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SERVICE
Troubleshooting - Extended 1