Manitowoc indigo series Technician's Handbook page 175

Diagnostics
SYMPTOMS
• Water trough overfills
• Water trough will not fill
NOTE: The ice machine will initiate a premature harvest if
the high water level probe circuit is complete and the low
water level probe is open.
WATER TROUGH OVERFILLING DURING THE FREEZE
CYCLE
Step 1
Press the power button and turn off the ice
machine.
Step 2
If water continues to flow with the ice machine
off, disconnect power. If water continues to flow with
power disconnected verify water pressure is below 80
psig before replacing the water inlet valve. If the water
stops continue with next step.
Step 3
Check water level probe mounting and verify
secure wiring connections at the probe and control
board.
Step 4
Scroll to Service/Diagnostics/Inputs and press
down arrow until Wtr Low and Wtr High are displayed.
• No is displayed on both Wtr low and Wtr high - The
control board is not receiving a sensing water signal -
Go to next step.
• Yes is displayed - The control board is receiving a
sensing water signal from the low and high probes -
Replace the control board.
Part Number STH025 11/16 175