Scotsman C2648 - Manual (Page 46)

C2648 Prodigy and Prodigy Plus Service Manual
January 2015
Page 46
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
Water
Temperature
Discharge
Temperature