Nd550, Component description: control box – Scotsman ND550 User Manual
Page 14
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 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
compressor. The reset switch
is mounted on the circuit
board.
On/Off Switch: Manual
control for the machine.
Transformer: Supplies low
voltage to the circuit board.
Potential Relay: The
compressor start relay.
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.
Portion Control Module:
Controls the amount of time
the dipensing drive motor is
on. The time is varied by
adjustine the portion control
knob.
PORTION
CONTROL
MODULE
CONTACTOR
RESET
SWITCH
CIRCUIT
BOARD
TRANSFORMER
POTENTIAL
RELAY
ON-OFF SWITCH
ND550
August, 1989
Page 14