PTC Motor Overtemperature

What does OH3 mean?

The motor's PTC (Positive Temperature Coefficient) thermistor has detected an overtemperature condition within the motor, indicating it is too hot due to excessive currents, frequent, or prolonged accelerations. Alternatively, this fault can occur if the PTC sensor is not properly connected or its monitoring is not correctly configured. High motor temperatures can damage insulation and reduce motor lifespan.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   If PTC monitoring is not desired or the sensor is not used, set parameter C0585 to '3' to disable this monitoring function.