Koolaire KY0275W Technician's Handbook page 70

Safety Limit #2
Harvest time exceeds 3.5 minutes for 6 Consecutive
harvest cycles.
Possible Cause Checklist
Improper Installation
• Refer to "Installation and Visual Inspection Checklist"
on page 60.
Water System
• Water area (evaporator) dirty
• Dirty/defective water dump valve
• Vent tube not installed on water outlet drain
• Water freezing behind evaporator
• Plastic extrusions and gaskets not securely mounted
to the evaporator
• Low water pressure (20 psig min.)
• Loss of water from sump area
• Clogged water distribution tube
• Dirty/defective float valve
• Defective water pump
Electrical System
• Ice thickness probe out of adjustment
• Ice thickness probe dirty
• Bin switch defective
• Premature harvest
Refrigeration System
• Non-OEM components
• Improper refrigerant charge
• Defective harvest valve
• TXV flooding (check bulb mounting)
• Defective fan cycling control
70 Part Number STH047 5/16