PTC Overheating

What does OH2 mean?

This fault indicates that an external PTC thermistor embedded in the motor windings has detected a motor overtemperature condition, causing the Altivar 212 drive to trip and protect the motor.

• Motor overtemperature condition indicated by the external PTC thermistor.

Click steps to track your progress.

1. 1

   Correct the motor overload condition (e.g., reduce load, check motor cooling, ensure correct motor parameters).

2. 2

   Check the external PTC sensor and its wiring for correct operation and resistance values.