Manitowoc QuietQube Indigo Series Technician's Handbook page 174

5. Ohm Ice Thickness Probe
NOTE: Verify meter leads are properly connected to
VOM with the red meter lead connected to positive &
the black meter lead connected to negative
Disconnect Ice Thickness Probe from control
•
board
Connect red meter lead to the red wire and the
•
black meter lead to the black wire - Normal
readings = 1.4 to 2.5 KΩ's.
Reverse leads - Connect black meter lead to the
•
red wire, red meter lead to the black wire - Normal
readings = 1.2 to 1.5 KΩ's.
Ohm values are within range - Check control board
Pass
voltage at the ice thickness probe connection.
Fail
6. Check control board voltage
• Set VOM to DC voltage scale - Check voltage
across the top and bottom pin - Normal readings =
3.25 to 3.35 VDC.
Pass
Fail
174
Replace ice thickness probe.
Control board voltage is normal
Replace control board
Part Number STH026 8/12