Welbilt Koolaire KD0270A, Technician'S Handbook, Page: 69 / 136

Part Number STH047 Rev01 10/18 69
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 59.
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