Ice Making Sequence Of Operation; Control Board Revisions; Software Revisions - Manitowoc UDE065A Technician's Handbook

Ice Making Sequence of Operation

CONTROL BOARD REVISIONS

1. Original control board
2. Control board with J4 terminal, which can utilize a
thermistor to control when/if a water pump delay
occurs in the freeze cycle.
3. Control board with the addition of J8 & J9 terminals.
The J8 terminal can control an EC fan motor.
NOTE: The replacement control board is backward
compatible and can be used without thermistors or EC fan
motors.

SOFTWARE REVISIONS

In addition to the primary sequence of operation the
following software changes have been added.
Control boards with water trough thermistor and
firmware version before 2.70
The water trough thermistor performs the following
function in the freeze cycle:
• When the temperature of the water reaches 34° F the
water pump de-energizes for 25 seconds,
then re energizes.
• When the water pump restarts the water inlet
solenoid energizes for 7 seconds..
2.70 and Higher
• 120 second prechill cycle on initial start and 60 second
prechill cycles thereafter.
68 Part Number 000014797 Rev02 05/18