Manitowoc STH042 4/16, Technician'S Handbook

Page: 62 / 146

62 Part Number STH042 4/16
Step 3 Disconnect the harvest float switch wire from
the control board and place a jumper on the control
board harvest float switch terminals. Bypass the freeze
time lock-in feature by pressing the power button to
cycle the ice machine off/on. Wait until water flows over
the evaporator, then refer to chart.
Result Correction
10 seconds into the freeze cycle
the ice machine cycles from freeze
to harvest and the control board
harvest light energizes. The ice thickness float
switch wire is causing the
malfunction.
The harvest light comes on, but the
ice machine remains in the freeze
cycle. The ice machine is in a 6
minute freeze lock - Cycle
on/off and retest.
The harvest light stays off and the
ice machine remains in freeze. Replace the control
board.