112 Part Number 8001119 10/19
Safety Limit Checklist
The following checklists are designed to assist the
service technician in analysis. However, because
there are many possible external problems, do not
limit your diagnosis to only the items listed.
Safety Limit #1
Freeze time exceeds 60 minutes for 6 consecutive
freeze cycles.
Possible Cause Checklist
Improper installation
• Refer to “Installation and Visual Inspection
Checklist” on page 104
Water System
• Water Level set too high (water escaping through
over flow tube)
• Low water pressure (20 psig min.)
• High water pressure (80 psig max.)
• High water temperature (90°F/32.2°C max.)
• Clogged water distribution tube
• Dirty/defective float valve
• Defective water pump
Electrical System
• Ice thickness probe out of adjustment
• Harvest cycle not initiated electrically
• Contactor not energizing
• Compressor electrically non-operational
• Restricted condenser air flow
• High inlet air temperature (110°F/43.3°C max.)
• Condenser discharge air re-circulation
• Dirty condenser fins
• Defective fan cycling control
• Defective fan motor
• Low water pressure (20 psig min.)
• High water temperature (90°F/32.2°C max.)
• Dirty condenser
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