Manitowoc Indigo NXT IDT0300A Installation, Operation And Maintenance Manual page 44

Operation
Safe Operation Mode
Allows the ice machine to operate up to
72 hours if the ice thickness probe and/or
water level probe sensors fail.
• When the control board starts the safe
mode, an alert is flashed on the display
to notify the end-user they have a
production problem.
• The control board automatically initiates
and monitors the safe mode. The control
will automatically exit the safe mode if a
normal signal is received from the input.
• After 72 consecutive hours, the control
board will enter a standby mode and
turn off.
NOTE: When the ice machine is first
powered up or there is a power loss and
restarted, a water fill time array will be
used in calculating the average of the five
cycles.
Water Assist Harvest
When the damper/curtain does not open
within 3.5 minutes in the harvest cycle the
following occurs:
• 3.5 minutes - The water inlet valve
energizes until water touches the high
water level probe.
• 4 minutes - The water pump energizes.
• 6.5 to 7 minutes - The water dump valve
energizes.
44
Water Thaw Cycle
When the damper/curtain does not open
during the 7 minute harvest cycle the
following water thaw cycle occurs:
• 7 minutes - The compressor, harvest
solenoid valve and dump valve de-
energize.
1. The water pump remains energized
and the water inlet valve energizes
until water touches the high water
level probe.
2. Water is circulated over the
evaporator.
3. Water is circulated, dumped and
refilled to the high water level probe
for approximately 1 hour.
• At the end of the thaw cycle the ice
machine will start another freeze cycle
(approximately 1 - 1.75 hour).
Part Number 000014141 Rev 11 12/23
Section 3