Troubleshooting Guide - U-Line U-1075WCS-00 Service Manual

Troubleshooting Guide

!
CAUTION
Never attempt to repair or perform maintenance on the unit until the main electrical power has been disconnected.
Not Cooling
Frozen Product
Frost Buildup Inside Unit
Display Not Working
Internal Lights Not Working
Noisy
Ice Buildup In Drain Trough or Drain
Problem
Potential Causes
Compressor overheating
Compressor not operating
Compressor operating - no cooling
Evaporator fan not operating 
convect cool models only
Control set too cold
Review logged error codes 
electronic control models only
Thermistor failure 
electronic control models only
Door ajar or restricted from closing
Unit placed in Sabbath mode
electronic control models only
Display unplugged 
electronic control models only
Display wiring broken or damaged
electronic control models only
Door switch misaligned or defective
Door switch misaligned or defective
electronic control models only
Refrigeration tubing touching cabinet
Fan blade obstruction (wiring, foam insulation, packaging
material)
Obstructed drain cup or tube
Kinked condensate drain line
Drain trough and cup misaligned
U-Line Service
Troubleshooting
Suggested Remedy
Verify proper air flow through condenser. (Refer to
Airflow/General information Section of this manual)
Confirm condenser fan operation. (Refer to Airflow/
General information Section of this manual)
Test overload and relay, replace as needed.
Refer to Refrigeration System Diagnosis Guide Section
of this manual.
Refer to Convection Cooling Section of this manual.
convect cool models only
Refer to Adjusting Air Temperature Section of this
manual.
Refer to Fault System Diagnosis Guide Section of this
manual. electronic control models only
Refer to Thermistor Failure Section of this manual.
electronic control models only
Inspect/Repair door closure, adjust as needed.
Refer to Sabbath Mode Section of this manual.
electronic control models only
Verify that both ends of the display wiring are firmly
connected. electronic control models only
Perform continuity test of wiring and replace as needed.
electronic control models only
Check light switch, wiring and acuator. Adjust as needed.
Refer to Reed Switch Section of this manual.
electronic control models only
Carefully reposition tubing.
Remove obstruction.
Clear as needed, test flow.
Reroute condensate drain line and test flow.
Trough is slotted for adjustment. Loosen retainers and
adjust as needed.
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