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Search FAQs

What could cause the ATV21 or ATV212 drive, to trip on E20 fault?

Issue:
My ATV21/ATV212 drive is tripping on E20 faults.

Product Line:
Altivar ATV21 and ATV212

Environment:
All

Cause:
Excessive torque boost.
The drive calculates the expected motor torque based on the program parameters.  This fault occurs when the calculated value does not match the measured value.
It is most common on Pump and Fan applications when slowing down (decelerating) from above 40 Hz.

Resolution:
The E20 fault could be due to:

  1. An incorrect setting of the motor name plate data in the drive motor parameters.
  2. Incorrect deceleration ramp time for the application
  3. A wrong Auto tuning result (F402 parameter) when using certain motor control types (PT = 2