Service manual

Electrical Component Details
Compressor
•
Operated by the compressor contactor.
Contactor
•
Operated by the controller. Line voltage coil.
When energized the Compressor indicator
light will be ON.
Fan Motor(s)
•
Operated by the contactor
High pressure cut out
•
All models have a high pressure cut out
switch that signals the controller if the
discharge pressure is too high. It is an
automatic reset.
Low pressure switch
•
On remote models it controls the compressor
contactor. Will close on pressure rise,
pressure rises when liquid line valve opens.
Opens at a lower pressure.
•
Air and Water cooled models use a low
pressure cut out.
Liquid line valve
•
Remote only. Opened by the controller to
start ice making. Closed to shut unit off. Line
voltage coil.
Controller
•
Senses water, ice making, discharge
pressure, low side pressure, and auger
amps. Controls compressor contactor, fan
motor, and auger motor. Indicates status and
component operation.
Transformer
•
12 volt secondary, supplies power to
controller only. The Power light will be ON
when the transformer has provided 12 volts
AC to the controller.
Water Level Sensor
•
Two probe conductivity sensor. When water
touches it the Water Present light will be ON.
Auger Motor
•
Four pole, split phase motor that operates
the gear reducer. When operating, the Auger
indicator light will be ON. The gear reducer
lowers the input speed from about 1500 RPM
to 11. Auger rotation is CCW when viewed
from above.
Photo-electric eyes
•
An LED emitter and photo transistor receiver
set. Pulsed infrared light is continuously
emitted and received to detect ice in the
chute.
September 2009
Page 18
N0422, F0522, N0622, F0822, N0922, F1222, N1322, F1522
Air, Water or Remote Service Manual