Manitowoc Indigo Series Technician's Handbook page 104

Harvest Sequence
5. Water Purge
The air pump(s) (when used) and the harvest valve(s)
open at the beginning of the water purge to divert hot
refrigerant gas into the evaporator.
The water pump(s) continues to run, and the water
dump valve energizes to purge the water in the water
trough.
6. Harvest
The air pump (when used) remains energized and the
harvest valve(s) remains open. The refrigerant gas
warms the evaporator causing the cubes to slide, as a
sheet, off the evaporator and into the storage bin.
The sliding sheet of cubes opens the water curtain/ice
damper and bin switch.
The momentary opening and re-closing of the bin
switch terminates the harvest sequence and returns
the ice machine to the freeze sequence (Step 3 - 4.)
Automatic Shut-Off
7. Automatic Shut-Off
When the storage bin is full at the end of a harvest
sequence, the sheet of cubes fails to clear the water
curtain/ice damper and will hold it open. After the
water curtain/ice damper is held open for 30 seconds,
the ice machine shuts off. The ice machine remains off
for 3 minutes before it can automatically restart.
The ice machine remains off until enough ice has been
removed from the storage bin to allow the ice to fall
clear of the water curtain or all of the ice dampers. As
the water curtain/ice dampers swing back to the
closed position, the bin switch re-closes and the ice
machine restarts (steps 1 - 2), provided the 3 minute
delay period is complete.
104 Part Number STH025 8/12