NME454, 654 & FME504, 804
CONTROL BOX COMPONENTS
Contactor: A definite purpose contactor connecting the compressor to the power supply.
AutoSentry Control Board
The control 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.
Conductivity probe to determine if there is water in the reservoir.
Current meter to measure the amp draw of the auger drive motor.
The loads include:
Compressor contactor
Auger drive motor
The control board also includes several indicator lights.
Potential Relay: The compressor start relay.
On/Off (mode) Switch: Manual control for the
machine.
Water OK Light
Power Light
Service Light
Freeze Light 
Bin Full
Light
LED1
Compressor
Relay
Control Board
LED3
January 2007
Page 12
Auger Relay