Manitowoc J250 - Component Specifications and Diagnostics; Ice Thickness Probe and Control Circuitry Diagnostics; Troubleshooting Ice Machine Operation Issues

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Table of Contents (cont.)
Section 6 - Electrical System (cont.)
Component Specifications and Diagnostics
Fuses.............................................................................................................................................................6-36
Bin Switch....................................................................................................................................................6-36
Compressor Electrical Diagnostics ..............................................................................................................6-38
PTCR Diagnostics........................................................................................................................................6-39
Discharge Line Thermistor...........................................................................................................................6-43
Ice/Off/Clean Toggle Switch........................................................................................................................6-44
Control Board Relays...................................................................................................................................6-45
Electronic Control Board (Old Style)...........................................................................................................6-46
Electronic Control Board (New Style) .........................................................................................................6-47
Ice Thickness Probe (Harvest Initiation)
General .........................................................................................................................................................6-50
How the Probe Works ..................................................................................................................................6-50
Freeze Time Lock-In Feature.......................................................................................................................6-50
Maximum Freeze Time................................................................................................................................6-50
Installation of New Probe on Old Style Control Board................................................................................6-50
Diagnosing Probe Control Circuitry
Ice Machine Cycles Into Harvest Before Water Contact with Probe.....................................................6-51
Ice Machine Does Not Cycle Into Harvest When Water Contacts Probe ..............................................6-52
Diagnosing Ice Machine That Will Not Run..................................................................................................6-53