Service Manual

142 Part Number: 000015431 Rev 02 6/20
PRECHILL & FREEZE CYCLE OPERATION
The water inlet valve energizes and de-energizes in
conjunction with the water level probe located in the
water trough.
• The water inlet valve is ON when there is no water in
contact with the water level probes.
• The water inlet valve turns OFF after water contacts
the water level probes for 6 continuous seconds.
• The water inlet valve can cycle ON and OFF once in the
prechill and up to two times in the freeze cycle.
• Maximum fill time in the freeze cycle is:
Single evaporator 12 minutes
Dual evaporator 16 minutes
The water inlet valve energizes in the Prechill cycle and will
de-energize if water touches the high level probe (in most
instances the water trough can’t fill in the prechill cycle
and the water inlet valve will remain energized into the
freeze cycle). The water inlet valve will remain energized
until water contacts the high water probe. The water inlet
valve will cycle ON, and then OFF one more time to refill
the water trough. The water inlet valve is now OFF for the
duration of the freeze cycle.
REVERSE OSMOSIS OR DEIONIZED WATER USAGE
When using water with low total dissolved solid content
(low TDS) the water level probe sensitivity can be
increased by moving the jumper over one pin (refer to
“Electronic Control Board” on page 200) for location.
The Electronic Control Board diagrams shows the default
position of the jumper covering the left and center pins.
Moving the jumper to the center and right pins and
enabling R.O. menu “Use less water with reverse osmosis”
will increase the sensitivity of the water level probe.