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USER GUIDE
Troubleshooting - Extended 2
u-line.com
SAFETY • INSTALLATION & INTEGRATION • OPERATING INSTRUCTIONS • MAINTENANCE • SERVICE
TROUBLESHOOTING GUIDE
Concern Potential Causes Suggested Remedy
Not Cooling Compressor overheating Verify proper air flow through condenser. Is condenser clean?
Confirm condenser fan operation.
Confirm proper compressor operating voltage. Use #19, Component
Testing in Service Mode.
Compressor not operating Confirm proper compressor operating voltage. Use #19, Component
Testing in Service Mode.
Test overload and relay, replace as needed.
Compressor operating - no cooling Refer to System Diagnosis Guide.
Evaporator fan not operating Use #19, Component Testing in Service Mode.
Frozen Product Control set too cold Adjust Set Point Temp accordingly.
Review logged error codes Refer to #14, Error Log in Service Mode.
Thermistor failure Check Error Log in Service Mode, OHM thermistor.
Frost Buildup
Inside Unit
Door Ajar or Restricted from Closing Check door clearance to adjoining cabinetry. Check distribution of
product in unit.
Evaporator fan not operating Use Relay Toggle, Component Testing in Service Mode.
Thermistor failure Check Error Log.
Display Not
Working
Unit placed in Sabbath mode? Press and hold for 5 seconds to check.
Display unplugged Verify that both ends of the display wiring are firmly connected.
Display wiring broken or damaged Perform continuity test of wiring and replace as needed.
Internal Lights
Not Working
Control Setting Unit set to Sabbath Mode. Press and hold for 5 seconds to check.
Door switch misaligned or defective Check the function of reed switch and door magnet adjustment.
Noisy Refrigeration tubing touching cabinet Carefully reposition tubing.
Fan blade obstruction (wiring, foam
insulation, packaging material)
Remove obstruction.
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