Welbilt Koolaire KD0270A, Technician'S Handbook, Page: 67 / 136

Part Number STH047 Rev01 10/18 67
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 59
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
• Compressor relay not energizing
• Compressor electrically non-operational
• High inlet air temperature (110°F/43.3°C max.)
• Defective fan cycling control
• Defective fan motor
• Dirty condenser