Motak PKM0335, Service Manual

Page: 45 / 132

Part Number: 000016427 Rev 00 08/2020 45
Troubleshooting
No Ice Formation
The ice machine operates for an extended period, but there is no ice formation at all on
the evaporator.
Evaporator Tubing Routing
Routing of the tubing on the back of the evaporator determines the ice fill pattern failure
mode. The evaporator outlet tubing does not exit directly at the top of the evaporator,
but exits several inches below the top of the evaporator. Extremely Thin at the Evaporator
Outlet will first be visible several inches below the top of the evaporator. Extremely Thin at
Evaporator Inlet will first be visible at the bottom of the evaporator.
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 cycling the toggle switch Off/On and starting a new ice making
cycle.
A safety limit is indicated by a flashing light on the control board.
SAFETY LIMIT 1
If the freeze time reaches 35 minutes, the control board automatically initiates a harvest
cycle.
• After 3 consecutive 35 minute cycles, control board light SL#1 light will flash on/off at 1
second intervals.
• If 6 consecutive 35-minute freeze cycles occur, the ice machine stops and the SL#1 light
on the control board will be on continuously.
SAFETY LIMIT 2
If the harvest time reaches 3.5 minutes, the control board automatically returns the ice
machine to the freeze cycle.
• If three consecutive 3.5 minute harvest cycles occur, the SL#2 light on the control board
will flash on/off at 1 second intervals. After 75 consecutive 3.5 minutes harvest cycles,
the SL#2 light will be energized continuously.
• If 100 consecutive 3.5 minute harvest cycles occur, the ice machine stops and the SL#2
light on the control board will be on continuously.