74 Part Number 000015432 4/18
ICE DAMPER AND HALL EFFECT SWITCHES
Damper Door
FUNCTION
Opens and closes as ice passes from the ice chute to the
bin. A metal lever attached to the damper interrupts the
magnetic field sensed by the Hall Effect switches as the
damper opens and closes.
Hall Effect Switch #1 - Operational Sensing
This switch will open and re-close in conjunction with the
ice damper as ice is discharged from the evaporator. The
control board must see this switch open and close at least
once every 90 seconds during the freeze cycle.
Hall Effect Switch #2 - Shut-Off and Restart
This switch also works in conjunction with the ice
damper. When the switch opens, the ice machine stops
immediately. The ice machine restarts when the switch re-
closes and the five-minute delay period expires.
FUNCTION TEST
Place toggle switch in OFF position. HES#1 and HES#2 lights
will energize. Move ice damper slowly to open position.
• HES#1 light de-energizes, HES#2 remains energized.
• HES#2 light de-energizes as damper continues to open.
Move damper slowly to closed position. HES#2 energizes,
HES#1 remains de-energized.
HES#1 energizes as the damper continues to close.
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