124 Part Number STH038 5/12
Control Board Diagnostics
1. Micro light is not flashing a heartbeat.
2. Disconnect line voltage power supply to the ice
machine and wait a minimum of 15 seconds, then
reapply power.
A. Micro light flashes - continue with step 3.
B. Micro light is off - Replace control board.
3. Perform the following keystrokes on the display.
• Press Menu, scroll down to Service and press right
arrow
• Scroll down to Diagnostics and press right arrow
• Display reads Control Board, press right arrow
• Display reads Self Check, press right arrow to start
control board test
The control board performs a self test. As the test
progresses the display will show Checkmarks at the
top left of the display screen. When the fifth
Checkmark appears the display will show “Status
Passed” indicating the control board is functioning
normally.
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