Sterling SDA AP-1 specifications Determining Temperature Controller Errors or Sensor Errors

7-3 Determining Temperature Controller Errors or Sensor Errors

Using a Thermocouple

If the controller displays a temperature that is close to room temperature (70ºF/21ºC) when you short-circuit controller input terminals, the controller is normal and the sensor is probably broken, short-circuited, or incorrectly wired.

Using a Platinum Resistance Thermometer

If the controller displays a temperature of about 0.0°C (32ºF) when you insert a 100-ohm resistor between terminals A and –Bof the controller, and you short-circuit controller terminals +B and –B, the controller is normal and the sensor is probably broken, short- circuited, or incorrectly wired.

Other service problems or questions can be answered by contacting the Service Department.

Large Dehumidifying Dryers Troubleshooting 66