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 (Refer to Airflow/General
Information Section).
Confirm condenser fan operation (Refer to Airflow/General Information
Section).
Confirm proper compressor operating voltage (Refer to Toggle/
Compressor Information Section).
Compressor not operating
Confirm proper compressor operating voltage (Refer to Toggle/
Compressor Information Section to initiate power to the compressor).
Test overload and relay, replace as needed.
Compressor operating - no cooling
Refer to System Diagnosis Guide.
Evaporator fan not operating
Refer to Convection Cooling Section.
Frozen Product
Ensure proper use of Quick Chill mode
Refer to Control Operation Section.
Control set too cold
Refer to Adjusting Temperature Settings Section
Review logged error codes
Refer to Fault System Diagnosis Guide.
Thermistor failure
Refer to Thermistor Failure Section
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 #19, Component Testing in Service Mode.
Thermistor failure
Refer to Thermistor Failure Section.
Display Not
Working
Unit placed in Sabbath mode?
Refer to Sabbath Mode Section.
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
Refer to the Interior Lighting Section.
Unit set to Sabbath Mode. Refer to the Sabbath Mode Section.
Door switch misaligned or defective
Refer to Reed Switch Section.
Noisy
Refrigeration tubing touching cabinet
Carefully reposition tubing.
Fan blade obstruction (wiring, foam insulation,
packaging material)
Remove obstruction.
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