Manitowoc QF0400 Technician's Handbook page 109

Flush Sequence in the "ICE" Position
After the ice machine has run for 100 hours the ice
machine will stop making ice and perform a flush
sequence. The flush sequence will remove minerals
that have settled in the bottom of the evaporator. The
entire flush sequence lasts approximately 11 minutes,
after which the ice machine automatically resumes ice
making and the 100 hour counter in the control board
resets to zero.
NOTE: 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.
Remote Condensing Unit
5. Automatic Shut-Off
When the refrigerant pressure is low enough to open
the low-pressure switch, the contac2tor coil is de-
energized and the compressor and condenser fan
motor stop.
Part Number 80-1230-9 10/10 109