Temperature input error

What does 20 mean?

The temperature sensor connected to the drive's input is either not detected, improperly connected, or providing an invalid signal. This prevents the drive from accurately monitoring temperature.

• Disconnection or open circuit in the temperature sensor wiring connected to the drive's analog input terminals (e.g., 53/54).
• Faulty temperature sensor (e.g., PT100, NTC thermistor) providing an out-of-range signal (e.g., too high or too low resistance).
• Incorrect wiring of the sensor to the drive's terminals (e.g., 2-wire sensor connected to 3-wire input, reversed polarity).
• Drive's analog input parameter (e.g., P6-10 Sensor Type, P6-11 Low Value) incorrectly configured for the specific sensor type.
• Damage to the drive's analog input circuit on the control board, preventing accurate signal reading.

Click steps to track your progress.

1. 1

   Power down the drive, disconnect the temperature sensor wires from the drive's input terminals (e.g., 53/54).

2. 2

   Measure the resistance of the temperature sensor across its leads; compare to the sensor's specified temperature/resistance curve (e.g., PT100 should be 100 Ohms at 0C).

3. 3

   Inspect the entire length of the sensor wiring for breaks, insulation damage, or loose connections.

4. 4

   Verify the analog input configuration parameters (e.g., P6-10 Analog Input Type, P6-11 Analog Input Low Value, P6-12 Analog Input High Value) are correct for the installed sensor.

5. 5

   Temporarily connect a known good reference resistor (e.g., 100 Ohm for PT100) to the input terminals to simulate a valid sensor reading.