ABB PQFS Installation, Operation And Maintenance Instructions page 140

If 'ACK. FAULT' is present on the PQF-Manager display, look at the 'Armed' indicator (By
default mapped to the 4
will restart automatically after clearance of the problem or not.
- 'Armed' indicator ON: The filter waits for the problem to disappear and then restarts
automatically (unless the user acknowledges the fault).
- 'Armed' indicator OFF: The filter is permanently stopped and the customer has to solve
the problem, acknowledge the fault and restart the filter manually.
If the filter is in remote control operation and the message 'ACK. FAULT' is present on
the PQF-Manager, the fault can be acknowledged by sending a 'STOP' command by
remote control (low signal). Alternatively, the remote control functionality can be disabled
by disabling the corresponding digital input functionality. Then, the fault can be
acknowledged locally.
Refer to
140 Operating instructions ç Manual Power Quality Filter PQFS
In general the occurrence of transient faults is no problem for the proper
operation of the active filter. Only when an error becomes 'critical', a
problem may exist.
th
digital output of the PQF-Manager) to know whether the filter
Chapter 11 for advanced troubleshooting of the filter.