Manitowoc Manitowoc NEO UDF0190A, Installation, Operation And Maintenance Manual

Part Number:040005890 Rev 06  11/20 

15

Section 3 

Operation

SAFETY LIMITS

Safety limits are stored and indicated by the control board. 

The number of cycles required to stop the ice machine 

varies for each safety limit.
Safety limits can be reset by pressing the On/Off button and 

starting a new ice making cycle.
A safety limit is indicated by an energized Service Light on 

the touch pad. Refer to Section 5 if you receive a safety limit 

indication.
•  Safety Limit 1 - If the freeze time reaches 45 minutes, 

the control board automatically initiates a harvest cycle. 

After 6 consecutive 45-minute freeze cycles occur, the 

ice machine stops.

•  Safety Limit 2 - If the harvest time reaches 3.5 minutes, 

the control board automatically energizes the water 

pump and extends the harvest cycle another 3.5 

minutes (7 minutes total). If the ice damper does not 

open and close within the 7 minute harvest cycle, the 

ice machine enters a water thaw cycle for 170 seconds. 

If the damper does not open and close within the 

170 second thaw cycle, a second thaw cycle starts. The 

control board automatically initiates a freeze sequence 

when the thaw cycle(s) is complete. If 3 consecutive 

7 minute harvest and thaw cycles occur, the ice machine 

stops.

•  Safety Limit 3 - If the freeze time reaches 4 minutes 

and water is not sensed, the ice machine stops and 

initiates a 30 minute delay period. The ice machine will 

automatically restart at the end of the 30 minute delay 

period. If 100 consecutive failures occur, the ice machine 

stops.