Service Manual

88 Part Number: 000015430 Rev 02 5/20
E01 LONG FREEZE CYCLE
If the freeze time reaches 35 minutes, the control board
automatically initiates a harvest cycle. If 3 consecutive
35-minute freeze cycles occur, the ice machine stops.
E02 LONG HARVEST CYCLE
If the harvest time reaches 7 minutes, the control board
will start a Thaw Cycle and automatically return the ice
machine to the freeze cycle. After 3 consecutive long
harvest cycles the ice machine stops.
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STOPPED THE ICE MACHINE
Service Faults are designed to stop the ice machine prior
to major component failures, most often a minor problem
or something external to the ice machine. This may be
difficult to diagnose, as many external problems occur
intermittently.
Example: An ice machine stops intermittently on Service
Fault (long freeze times). The problem could be a low
ambient temperature at night, a water pressure drop, the
water is turned off one night a week, etc.
Refrigeration and electrical component failures will cause
a Service Fault trip. Eliminate all electrical components
and external causes first. If it appears that the refrigeration
system is causing the problem, use Manitowoc’s Freeze
Cycle Refrigeration System Operational Analysis Table,
along with detailed charts, checklists, and other references
to determine the cause.
The following checklists are designed to assist the service
technician in analysis. However, because there are many
possible external problems, do not limit your diagnosis to
only the items listed.