COMPONENT DESCRIPTION: Control Box
Contactor: A definite purpose contactor
connecting the compressor to the power supply.
Circuit Board
The circuit board receives input signals from
several sensors and translates them to control the
electrical power supply to the various loads.
The sensors include:
•
Electric eyes to check the ice level in the bin.
•
A thermistor to check the water level in the
reservoir.
•
Amp draw of the gearmotor.
The loads include:
•
Compressor contactor
•
Fan motor
•
Auger drive motor
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.
ON/OFF SWITCH
LOW
PRESSURE
CUT OUT
SWITCH
POTENTIAL
RELAY
TRANSFORMER
CONTACTOR
CIRCUIT
BOARD
"No Water" Light.
Glows When Water
Reservoir is Dry
"Bin Empty" Light.
Glows When Ice Level Is
Below Electric Eyes
NME650 & FME800
February 1997
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