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Safety Limit #1
Refer to page 75 for control board identification and
safety limit operation.
Control Board with Black Microprocessor
- Freeze
Time exceeds 60 minutes for 3 consecutive freeze
cycles
or
Control Board with Orange Label on
Microprocessor - Freeze time exceeds 60 minutes
for 6 consecutive freeze cycles
Possible Cause Checklist
Improper Installation
• Refer to “Installation/Visual Inspection Checklist”
Water System
• 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 water fill valve
• Dirty/defective water dump 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 airflow
• High inlet air temperature (110°F/43.3°C max.)
• Condenser discharge air recirculation
• Dirty condenser fins
• Dirty condenser filter
• Defective fan cycling control
• Defective fan motor
• Restricted condenser water flow
• Low water pressure (20 psig min.)
• High water temperature (90°F/32.2°C max.)
• Dirty condenser
• Dirty/defective water regulating valve
• Water regulating valve out of adjustment
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