Manitowoc Marine Q 1000, Service Technician'S Handbook

Page: 88 / 179

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SAFETY LIMIT INDICATION
Control Board with Black Microprocessor
When a safety limit condition is exceeded for 3
consecutive cycles the ice machine stops and the
harvest light on the control board continually flashes
on and off. Use the following procedures to determine
which safety limit has stopped the ice machine.
1. Move the toggle switch to OFF.
2. Move the toggle switch back to ICE.
3. Watch the harvest light. It will flash one or two
times, corresponding to safety limits 1 and 2, to
indicate which safety limit stopped the ice machine.
After safety limit indication, the ice machine will restart
and run until a safety limit is exceeded again.
Control Board with Orange Label on
Microprocessor
When a safety limit condition is exceeded for 3
consecutive cycles the control board enters the limit
into memory and the ice machine continues to run.
Use the following procedures to determine if the
control board contains a safety limit indication.
1. Move the toggle switch to OFF.
2. Move the toggle switch back to ICE.
3. Watch the harvest light. If a safety limit has been
recorded, the harvest light will flash one or two
times, corresponding to safety limit 1 or 2.