Ice Thickness Sensor - Scotsman C0530SR-1 Technical 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
September 2006 Page 58