Welbilt KOOLAIRE K0170 Series, Installation Manual, Page: 185 / 200

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Diagnosing an Ice Machine that cycles into Premature Harvest, Before
the Harvest Float Switch Drops.
185
Troubleshooting:
Step 1: Disconnect the Harvest float switch plug from the control
board.
Step 2: Bypass the freeze time lock-in feature by cycling the toggle
switch off and then back on. Wait until water flows over the
evaporator, then refer to chart.
Result Correction
The harvest light does not come on. The Harvest float switch or wire is
causing the malfunction. Refer to
Float Switch Diagnostics.
The harvest light comes on but the
ice machine stays in a freeze cycle.
Verify the ice machine was cycled off
then on and the ice machine is not in
a six minute freeze time lock-in.
10 seconds into the freeze cycle the
ice machine cycles from freeze to
harvest and
the control board harvest light
energizes.
Replace the Control Board.