Manitowoc STH042 4/16, Technician'S Handbook

Page: 64 / 146

64 Part Number STH042 4/16
Step 2 Reapply power and press the power button to
cycle the ice machine off/on and bypass the freeze time
lock-in feature. Wait until water flows over the evaporator,
then refer to chart.
Result Correction
The harvest light does not come on
and the ice machine stays in freeze. Refer to Float Switch
Diagnostics
The harvest light comes on but the
ice machine stays in a freeze cycle. The ice machine is in a 6
minute freeze lock - Cycle
on/off and retest.
10 seconds into the freeze cycle
the ice machine cycles from freeze
to harvest and the control board
harvest light energizes. Proceed to Step 3.
Step 3 Disconnect the harvest float switch wire
from the control board and 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
The harvest light does not come on. The harvest float switch
wire is causing the
malfunction.
The harvest light comes on but
the ice machine stays in the freeze
sequence. The ice machine is in a 6
minute freeze lock - Cycle
on/off and retest.
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.