Manitowoc I0320A, Technician'S Handbook

Page: 144 / 182

142 Part Number STH038 5/12
Freeze Cycle Operation
During the Freeze cycle, the water inlet valve
energizes and de-energizes in conjunction with the
water level probe located in the water trough.
During the first 45 seconds of the Freeze cycle:
• The water inlet valve is
ON
when there is no water
in contact with the water level probes.
• The water inlet valve turns
OFF
after water
contacts the water level probes for 3 continuous
seconds.
• The water inlet valve will cycle ON and OFF once
in the prechill and up to two times in the freeze
cycle.
• Maximum fill time is 6 minutes for single
evaporator.
After 45 seconds into the Freeze cycle:
The water inlet valve will cycle ON, and then OFF one
more time to refill the water trough. The water inlet
valve is now OFF for the duration of the freeze cycle.
Diagnostics
SYMPTOMS
•
Water trough overfills
• Water trough will not fill
• Display indicates a “Long Freeze” alert and may or
may not also indicate a safety limit 1
• Ice production is low