Scotsman FM800 Service Manual page 11

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
for 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. The reset
switch is mounted on the circuit board.
Transformer: Supplies low voltage to the
circuit board.
ON/OFF SWITCH
LOW
PRESSURE
CUT OUT
SWITCH
POTENTIAL
RELAY
TRANSFORMER
CIRCUIT
BOARD
Low Pressure Cut Out Switch: A manual
reset control that shuts 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: Part of Circuit Board, manual
reset. Lights up when unit shuts off from: ice
discharge chute being overfilled (opening the
microswitch at the top of the chute); low or
high pressure switches opening.
December, 1988
Page 11
FM800
CONTACTOR
RESET SWITCH