I²t overload

What does OC6 mean?

This fault signifies an I²t overload condition, where the motor or drive has been operating with high current for an extended duration, causing excessive heat. The default behavior for this fault is to be switchable off, suggesting it might be configurable to a warning or message level, but its presence still indicates potential thermal stress on the components if not addressed.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Inspect motor ventilation: Verify the motor's cooling fan and airways are clear and functional.

2. 4

   Measure motor current: Use a clamp meter to verify actual motor current under load against rated current.

3. 5

   Check for mechanical binding: Manually turn the motor shaft (if safe) to detect any binding or excessive friction in the mechanical system.