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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