Temperature Sensors - Scotsman C0530SR-1 Technical Manual

Temperature Sensors

1. Check controller. If the sensor calibration is completely out of range, the code display will
read either 5 or 7.
2. Check with an ohmmeter. Open control box cover, unplug sensor from J6. Water
temperature probe: Measure the temperature of the water. Push and release the clean button.
Wait one minute. Measure the resistance of the water probe (two leads next to the open
socket) and compare to the resistance in the chart for that temperature. Any reading within
1000 ohms is acceptable. Discharge sensor: Measure the temperature of the discharge line as
close to the sensor as possible. Measure the resistance of the discharge temperature sensor
(two leads farthest away from the open socket on the harness connector) and compare to the
resistance in the chart for that temperature. Any reading within 1000 ohms is acceptable.
3. Alternate procedure: Remove both water and discharge sensors from their places on the ice
machine. Put both into a container of ice water. Put a thermometer in the water. When the
thermometer is at 32 degrees F., check the resistance of each sensor. The resistance should
be within 1000 ohms of 32649.
Back of Controller
September 2006 Page 60
Water
Temperature
Sensor Set
Discharge
Temperature
Sensor Set