THERMISTOR FAULT

Hva betyr 907 ?

The thermistor used for temperature sensing is detected as either open or shorted. This fault can also occur if the ambient machine room temperature is below 0°C, causing the detected resistance to be abnormally high. On larger drives, an open thermostat will also trigger this fault. This fault will not shut down the drive.

• An open circuit in the thermistor or its wiring.
• A short circuit in the thermistor or its wiring.
• Ambient machine room temperature falling below 0°C, leading to excessively high thermistor resistance readings.
• An open thermostat on larger drive models.

Klikk på steg for å spore fremgangen.

1. 1

   Check the thermistor and its wiring for open or short circuits; it should measure between 2K – 10K ohms at 20C room temperature.

2. 2

   Verify that the machine room ambient temperature is above 0°C.

3. 3

   On larger drives, inspect the thermostat for an open circuit.