Motor temperature monitor defective

What does F2021 mean?

The drive has detected a fault in the motor temperature monitoring circuit or sensor. This means the drive cannot reliably protect the motor from overheating.

• Open circuit or short circuit in the motor temperature sensor wiring.
• Faulty motor temperature sensor (e.g., PTC thermistor, KTY sensor).
• Incorrect type of temperature sensor selected in drive parameters.
• Damage to the drive's internal temperature monitoring input circuit.

Click steps to track your progress.

1. 1

   Inspect the motor temperature sensor wiring for continuity, short circuits, and secure connections at both the motor and drive terminals.

2. 2

   Measure the resistance of the motor temperature sensor directly at the motor and then at the drive input terminals to check cable integrity. Compare with the sensor's characteristic curve.

3. 3

   Verify that the drive parameter for the motor temperature sensor type is correctly configured for the installed sensor (e.g., PTC, KTY84).

4. 4

   If the sensor and wiring are confirmed good, the issue may lie within the drive's temperature monitoring circuit.