Ice Thickness Sensor - Scotsman C2648 - SERVICE MANUAL 11-2010 Service Manual

C2648 Service Manual

Ice Thickness Sensor

1. Test using the controller's indicator light. Observe the Ready To Harvest light. Shut the machine off.
Use a wire to connect the metal part of the Ice Thickness sensor to the evaporator or simply remove the
Ice Thickness Sensor and touch its metal surface to the metal control box wall. The Ready for Harvest
light should go ON.
2. Test with an Ohmmeter. Disconnect electrical power. Open the control box cover. Unplug the ice
thickness sensor lead from the controller. Connect an ohmmeter lead to the ice thickness sensor lead,
touch the other ohmmeter lead to the ice machine chassis. There must be an open circuit. If there is
continuity, the sensor must be replaced. If there is no continuity, touch the ohmmeter lead to the metal
part of the ice thickness sensor. There should be continuity. If open, check the ice thickness sensor for
scale build up. Clean and recheck. If still open, replace the ice thickness sensor.
3. Test the controller's ice thickness sensor circuit by connecting a wire from J10 to ground. Reconnect
electrical power. The Ready for Harvest light should go ON
Ready To Harvest light
is ON when water
contacts ice thickness
sensor.
Ice Thickness
Sensor
November 2010
Page 24