Part Number STH098 06/19 11
Troubleshooting
Troubleshooting UDP0140/UDP0240/UDP0310 ..75
Problem Checklist .......................75
Control Board Test Mode .................78
Operating Ice Machine with Bin and Touch Pad
Removed ..............................78
Safety Limit Feature .....................79
Diagnosing an Ice Machine that Will Not Run 86
Ice Machine Does Not Cycle Into Harvest when
the Harvest Float is down/closed...........87
Ice Machine Cycles Into Harvest Before the
Harvest Float is down/closed ..............89
Ice Production Check ....................91
Installation/Visual Inspection Checklist......93
Water System Checklist...................94
Refrigeration Diagnostics .....................96
Eliminate all non refrigeration problems before
diagnosing the refrigeration system. .......96
Ice Formation Pattern ....................97
Discharge Line Temperature Analysis .......98
Comparing Evaporator Inlet/Outlet
Temperatures...........................99
Refrigeration Diagnostic Procedure........100
Flooding Expansion Valve Symptoms ......101
Starving Expansion Valve/Low Refrigerant
Charge Symptoms ......................101
Overcharged System Symptoms...........102
Higher than normal freeze cycle temperatures .
.....................................102
Harvest Valve ..........................103
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