Motor Overtemperature (PTC TRIP)

What does OH3 mean?

The motor's PTC thermistor has detected an overtemperature condition, triggering a TRIP fault. This is usually caused by the motor operating under impermissible high currents or frequent/long acceleration processes, or simply if the PTC sensor is not connected while monitoring is active (C0119 = 1 or 4). Continued motor operation in an overtemperature state will lead to severe winding damage and premature motor failure.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   If no PTC is used and monitoring is not desired, switch off PTC monitoring via parameter C0119 (set to 0 or 3).