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CU50
Service Manual
Controller
High
Voltage
Connector
The controller is located at the front of the unit,
under the top panel.
It is powered by a 12 volt transformer. It has
5 indicator lights:
• Compressor - Light is ON if compressor is
powered
• Water - Light is ON if inlet water solenoid
valve is powered
• Hot Gas - Light is ON when Hot Gas Valve
is powered
• Fan - Light is ON when Fan motor is
powered
• Power - Light is ON when power is
connected to controller
Evaporator
Thermistor
Comp
Water
Hot Gas
Fan
Power
Power Supply
Connector
Control Safeties:
No Water. If the Water Sensor cannot detect
water, and the inlet water solenoid valve has been
on for the maximum fill time, the controller will
stop all action and wait 20 minutes to re-try water
fill. During this time the Check Water light on the
control panel will be blinking.
Maximum Freeze Time. If the freeze cycle
should extend to 60 minutes, the controller will
automatically put the machine into a Harvest cycle.
Maximum Harvest Time. 6 minutes.
Time between restarts. After the machine has
operated and then turned off, the controller will not
restart the machine for four minutes.
March 2010
Page 20
Bin
Thermostat
Water Sensor
Control Panel
Ribbon
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