Manitowoc I0320 Technician's Handbook page 141

SPECIFICATIONS
The bin switch is a magnetically operated reed switch.
The magnet is attached to the lower right corner of the
water curtain/ice dampers.
The bin switch is connected to a varying D.C. voltage
circuit. (Voltage does not remain constant.)
Because of a wide variation in D.C. voltage, it
NOTE:
is not recommended that a voltmeter be used to check
bin switch operation.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).
Part Number STH038 5/12 139