Fault System Diagnosis Guide - U-Line U-3045WCINT-60B User Manual & Service Manual

USER GUIDE
SAFETY • INSTALLATION & INTEGRATION • OPERATING INSTRUCTIONS • MAINTENANCE •

FAULT SYSTEM DIAGNOSIS GUIDE

Error
No Comm
Zone T Open
Evap T Open
Amb Thrm Open
Zone T Short
Evap T Short
Amb Thrm Short
Temp Hi 6H+
Temp Hi 12H+
Temp Lo 6H+
Temp Lo 12H+
Door Open 5M
Solution 1
Inspect Customer UI and Data
Cable (if defective replace entire
door)
Inspect zone thermistor
connection. Replace if necessary.
Inspect evaporator thermistor
connection. Replace if necessary.
Inspect ambient thermistor
connection. Replace if necessary.
Inspect thermistor cable for pinch
points or damage. Replace if
necessary.
Inspect thermistor cable for pinch
points or damage. Replace if
necessary.
Inspect thermistor cable for pinch
points or damage. Replace if
necessary.
If excessive frost is also noted,
inspect door and door gasket for
proper seal and alignment.
If excessive frost is also noted,
inspect door and door gasket for
proper seal and alignment.
Inspect main control for proper
relay operation.
Inspect main control for proper
relay operation.
Verify door closes properly.
Solution 2
Inspect main control wire harness
for splits or breaks. Repair split or
cut cabling.
Inspect main control wire harness
for splits or breaks. Repair split or
cut cabling.
Inspect main control wire harness
for splits or breaks. Repair split or
cut cabling.
Inspect wire harness from main
control board for pinch points or
damage. Repair split or pinched
cabling.
Inspect wire harness from main
control board for pinch points or
damage. Repair split or pinched
cabling.
Inspect wire harness from main
control board for pinch points or
damage. Repair split or pinched
cabling.
Inspect evaporator fan for proper
operation.
Inspect evaporator fan for proper
operation.
Inspect refrigeration system.
Reference the System Diagnosis
Guide.
Inspect refrigeration system.
Reference the System Diagnosis
Guide.
Inspect cable arm, verify presence
of magnet, verify proper operation
and movement or arm.
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SERVICE
Solution 3
Inspect refrigeration system.
Reference the System Diagnosis
Guide.
Inspect refrigeration system.
Reference the System Diagnosis
Guide.
Inspect reed switch wiring.
Troubleshooting - Extended 5