COMPONENT DESCRIPTION: Control Box
Contactor: A definite purpose contactor
connecting the compressor and the remote
condenser fan motor to the power supply.
Circuit Board: Controlling the ice machine
through sensors and relays. The sensors are:
ice level, and water level. The relays are for
the gear motor (with a built in time delay to
clear the evaporator of ice when the unit turns
off) and for the liquid line valve.
Transformer: Supplies low voltage to the
circuit board.
Pump Down Control: An automatic reset
pressure switch connected to the low side of
the refrigeration system. Controls the
compressor.
Potential Relay: The compressor start relay.
On/Off Switch: Manual control for the
machine.
Early Models Only:
The first models featured a circuit board with a
reset switch on it, it was a manual reset.
When the unit shuts off from the ice discharge
chute being overfilled (opening the
microswitch at the top of the chute) or if the
high pressure cut out switch opens.
CONTROL BOX
RESET SWITCH
(ONLY ON EARLY MDOELS)
CONTACTOR
ON/OFF SWITCH
PUMP DOWN CONTROL
POTENTIAL RELAY
TRANSFORMER
CIRCUIT
BOARD
NM950R
May, 1989
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