Manitowoc CNF0201, Technician'S Handbook

Page: 21 / 120

Part Number 000015432 Rev02 5/21 21
Ice Making Sequence of Operation
CNF0201 - CNF0202 NUGGET MACHINES
Ice Making Sequence of Operation
PRIOR TO START-UP
When the toggle switch is placed in the ICE position, the
following must occur in the listed order before ice making
will start.
• The low temperature thermostat, low and high
pressure switch contacts must be closed.
• The 15-minute delay period must be expired. The
delay period starts upon application of power or a
change in toggle switch position.
• The ice chute damper must be in the closed or down
position.
• The water sensing switch must be closed (water
reservoir full of water and water sensing float in the up
position).
INITIAL START-UP
A 15-minute delay period must expire. The delay period
starts to time out upon application of power and can
only be overridden by depressing the test switch on the
control board. The gear motor energizes and when water
in the reservoir closes the water sensing (float switch) the
compressor and condenser fan motor energize.
FREEZE CYCLE
The float valve automatically maintains the water level in
the reservoir. The ice damper will open and close to verify
ice production. The ice machine will continue to make ice
until the ice damper is held open (up) as ice fills the bin.
Operation