Manitowoc IYT0750W251 User Manual

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Part Number: 000015430 Rev 02 5/20 91

E02 LONG HARVEST

Harvest time exceeds 7 minutes for 3 consecutive harvest

cycles.

Possible Cause Checklist

Improper Installation

• Refer to “Installation/Visual Inspection Checklist” on

page 108

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

• Clogged water distribution tube

Electrical System

• Ice thickness probe out of adjustment

• Bin switch closed/defective

• Premature harvest - The control board initiates a

harvest cycle when the high water level probe circuit is

complete and the low water level probe is open.

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 regulating valve is

incorrectly adjusted or will not close during harvest

cycle.

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Manitowoc IYT0750W251 IYT0750W-251 30" Indigo NXT Series Water Cooled Modular Ice Machine with 687 lbs. Daily Ice Production, easyTouch Display, Acoustical Ice Sensing Probe and Active Sens