Part Number 000007651 05/10
9
Section 3
Operation
Sequence of Operation
PRIOR TO START-UP
When the toggle switch is placed in the “ice” position the
following must occur prior to starting an ice making
cycle.
A. The
bin level probe
must be
open
(bin level
light off). If the probe is closed, (bin level light
on) when the toggle switch is moved to ICE, the
control system waits until the bin level probe
opens, (bin level light off) before starting an ice
making sequence. If the bin level probe is
removed/disconnected the ice machine will not
start.
B. The
water level probe
must be
closed
(water
level light on) to start the compressor. If the
water level probe is open (water level light off),
the control system waits until the water level
probe closes before starting the compressor.
INITIAL START-UP
1.
Flush
Immediately after placing the toggle switch into ICE, the
gearbox energizes. After 45 seconds the water float
valve solenoid is energized.
2.
Freeze Cycle
When water contacts the water level probe, the
compressor and condenser fan motor energize
(condenser fan motor is wired through a fan cycling
control).
The gear motor, compressor, condenser fan motor and
water float valve solenoid remain energized as the ice
machine makes ice. The water float valve will open and
close automatically to maintain the proper water level.
AUTOMATIC SHUT-OFF
3.
Ice Run Out
Ice will build up in the bin until it contacts the bin level
probe. After ice contacts the bin level probe for 30
continuous seconds the compressor de-energizes. To
allow excess ice to run out, the gear motor and the water
float valve solenoid remain energized for an additional
45 seconds, then de-energize.
A 8-minute lockout starts when the compressor de-
energizes. When the ice drops away from the bin level
probe the ice machine will begin an initial start-up cycle,
provided the “8-minute lockout” has expired.
8 MINUTE LOCKOUT
The bin level light will flash until the 8-minute lockout
expires.
After the 8 minute lockout expires the bin level light will
de-energize.
The 8 minute lockout time can be overridden by moving
the ON/OFF/CLEAN toggle switch from ICE to OFF then
back to ICE.
SAFEGUARD FEATURE
In addition to standard safety controls, your Manitowoc
ice machine features built-in SafeGuards. The ice
machine will stop when conditions arise that would
cause major component failure. Refer to Section 5 for
full details.
Flake ice machines use an auger to remove ice from the
evaporator. Occasional noises (creaks, groans, or pops)
are a normal part of the ice making process.
