U-Line 1000 SERIES - Main Control and Power Fault Troubleshooting; Diagnosing Unit Power Issues; Testing Main Control Board and Outputs; Main Control Faults and Factory Defaults

USER GUIDE
Troubleshooting - Extended 1
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Troubleshooting - Extended
SPECIFIC ERRORS & ISSUES
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 Suggested Remedy
Not Cooling Compressor overheating 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)
Compressor not operating Test overload and relay, replace as needed.
Compressor operating - no cooling Refer to Refrigeration System Diagnosis Guide Section of this
manual.
Evaporator fan not operating, convect cool
models only
Refer to Convection Cooling Section of this manual. convect cool
models only
Frozen Product Control set too cold Refer to Adjusting Air Temperature Section of this manual.
Frost Buildup Inside
Unit
Door ajar or restricted from closing Inspect/Repair door closure, adjust as needed.
Internal Lights Not
Working
Door switch misaligned or defective Check light switch, wiring and acuator. Adjust as needed.
Noisy Refrigeration tubing touching cabinet Carefully reposition tubing.
Fan blade obstruction (wiring, foam
insulation, packaging material)
Remove obstruction.
Ice Buildup In Drain
Trough or Drain
Problem
Obstructed drain cup or tube Clear as needed, test flow.
Kinked condensate drain line Reroute condensate drain line and test flow.
Drain trough and cup misaligned Trough is slotted for adjustment. Loosen retainers and adjust as
needed.