ABB PQFM Instruction Manual page 222

Symptom
The THDV increases
when the filter is
running.
Remark:
If the problems persist, contact your ABB service provider. Provide him with all the relevant
information, i.e. filter serial number and type, status of the control LEDs, error messages
displayed and filter behavior.
222 Troubleshooting guide ç Manual Power Quality Filter PQFM
Cause / State
The background
distortion is in antiphase
with the load distortion.
The filter is in an incorrect
state.
What to do
Check the background distortion.
Stop the filter and reset it by
switching off and on the power.