SAFETY LIMIT #2
Harvest time exceeds 3.5 minutes for 500 consecutive
harvest cycles
Possible Cause Checklist
Improper Installation
•
Refer to "Installation/Visual Inspection Checklist"
page 131
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 water fill valve
•
Defective water pump
Electrical System
•
Ice thickness probe out of adjustment
•
Ice thickness probe dirty
•
Bin switch closed/defective
•
Premature harvest
Refrigeration System
•
Non-Manitowoc components
•
Improper refrigerant charge
•
Defective head pressure control valve
•
Defective harvest valve
•
TXV flooding (check bulb mounting)
•
Defective fan cycling control
•
Water cooled only - Water inlet valve is incorrectly
adjusted or will not close during harvest cycle.
112
Part Number STH025 02/12