Ice Machine Does Not Cycle Into Harvest When Water Loses Contact With The Harvest Float Switch - Manitowoc MD0420A Technician's Handbook

Ice Machine Does Not Cycle Into Harvest
when Water Loses Contact with the
Harvest Float Switch
NOTE: The ice machine will make a thick or double
slab when a new freeze cycle is started with ice
already present on the evaporator.
Two of the most common scenarios are:
• Power is cycled off/on with ice on the evaporator.
• The water curtain/bin switch is opened/closed in
the harvest cycle before the ice releases.
Remove all ice from the evaporator before starting
diagnostic procedures.
Freeze Time Lock-In Feature
The ice machine control system incorporates a freeze
time lock-in feature. This prevents the ice machine
from short cycling in and out of harvest. The control
board locks the ice machine in the freeze cycle for six
minutes. After six minutes a harvest cycle can be
initiated. To allow the service technician to initiate a
harvest cycle without delay, this feature is not used on
the first cycle after moving the toggle switch to OFF
and back to ON.
ICE THICKNESS FLOAT
SWITCH
Part Number 040005626 5/17
HARVEST FLOAT SWITCH
51