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138 Part Number: 000015430 Rev 02 5/20
CONTROL BOARD RELAY TEST
The control board can be set to energize all relays for 3.5
minutes. This allows testing to verify control board relays
are closed and line voltage is available for ice machine
components - Water pump, dump valve, water inlet valve,
harvest valve(s), air compressor(s), contactor/compressor/
fan motor - The fan cycle control must close to energize
the fan motor.
1. Press On/Off button to turn off ice machine and
navigate in menu to enable all relays.
• Menu/Service/Diagnostics/Control Board/Enable All
Relays.
2. The control board will energize all relays and the red
light next to the relay. The red light indicates the relay
coil is energized.
3. Test for line voltage at the individual components.
A. Line voltage is present and the component is non
functional - Replace component
B. Voltage is not present at the component -
Proceed to step 5
4. Refer to wiring diagram and determine wire location
on the 9 pin molex connector for the component you
are testing.
5. Check for line voltage at the control board 9 pin molex
connector.
A. Line voltage at 9 pin connector - Repair wiring to
component
B. No power at 9 pin connector - Replace control
board
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