Manitowoc Indigo Series Technician's Handbook page 237

Diagnostics
SYMPTOMS
Bin Switch Fails Open
• The ice machine will not start an ice making cycle
and the display indicates "Curtain Open".
• The ice machine will run in the clean cycle.
Bin Switch Fails Closed
• When running a "Long Harvest" alert is displayed
and safety limit 2 indicated.
• May be off on a safety limit 2.
• The harvest cycle continues after ice opens and
closes the ice damper (harvest cycle is 3.5
minutes for single evaporators and 7 minutes for
multiple evaporator models).
DIAGNOSTICS
1. Verify bin switch, damper and damper magnet are
in place.
• Press the Menu button.
• Scroll down to Service and press right arrow.
• Scroll down to Diagnostics and press right arrow
• Scroll down to Inputs and press right arrow to
display curtain switch readings (Curt SW1, Curt
SW2, etc).
2. Open and close the ice damper(s) repeatedly
while observing the display and control board
lights.
A. Curtain switch cycles open/closed and
control board light energizes/de-energizes -
Bin switch is operating normally
B. Curtain switch remains closed and control
board light remains on - Replace bin switch
C. Curtain switch remains open and control
board light remains off - Go to next step
Part Number Preliminary 6/11 237