Scotsman NM1250 Service Manual page 11

COMPONENT DESCRIPTION: Control Box
Contactor: A definite purpose contactor
connecting the compressor 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 compressor.
Transformer: Supplies low voltage to the
circuit board.
TRANSFORMER
CIRCUIT BOARD
Low Pressure Control (Cut Out): A manual
reset control to shut off the ice machine when
the low side pressure drops below a preset
point, 0-4 psig.
Potential Relay: The compressor start relay.
On/Off Switch: Manual control for the
machine.
Reset Switch: Manual reset. Glows when
the unit shuts off from the ice discharge chute
being overfilled (pressure of the ice opening
the microswitch at the top of the chute), or if
either of the pressure cut out switches opens.
February, 1989
Page 11
NM1250
LOW PRESSURE
CUT OUT
ON/OFF SWITCH
POTENTIAL RELAY
CONTACTOR
RESET SWITCH