Section 5

Before Calling for Service

 

 

Safety Limit #2

Harvest time exceeds 3.5 minutes for 3 consecutive harvest cycles.

Possible Cause

Check/Correct

Improper installation

See “Installation Instructions” Section 2 of this manual

Water system

Water area (evaporator) dirty

 

Water freezing behind evaporator

 

Low water pressure (20 psi minimum.)

 

Loss of water from sump area

 

Clogged water distribution tube

 

Dirty/defective water 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-Manitowoc components

 

Improper refrigerant charge

 

Defective hot gas valve

 

TXV flooding (check insulation and bulb mounting)

 

Defective fan cycling control

Because there are many possible external problems,do not limit your diagnosis to only the items listed in these charts.

Part Number 000001130 12/08

5-5

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Manitowoc Ice Q130 manual Safety Limit #2