ABB PQFS Installation, Operation And Maintenance Instructions page 127

Corrupted DSP code
Corrupted uC code
Internal uC fault
Ctrl over temperature
DSP watchdog
µController watchdog
SPI Time out
Flash memory corrupted
Power supply fault
Preload time-out
Real time clock problem
Several units same id
Different firmwares
For guidelines on how to troubleshoot and solve the reported problems, refer to
Chapter 11.
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For multi-unit filters, this data can be obtained for each individual unit.
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Internal system errors are most likely due to faulty hardware and thus the only
solution may be to exchange the controller cards.
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If the message 'IGBT check cooling' appears, this implies that the system is
stopped due to an over temperature problem.
In that case, check the cooling of the system (fans, filters) and of the switchgear
room (air conditioning system etc.)
After the problem is solved the system has to be manually reset (fault
acknowledgement) before normal operation can be resumed.
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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.
A fault is considered critical if after occurrence, it cannot be successfully
automatically cleared by the system within a reasonable time. The time frame
considered depends on the error type.
Internal system error
Internal system error
Internal system error
The system detected an over temperature of the main
controller board
Internal system error
Internal system error
Internal system error
Internal system error
Internal system error
The DC capacitors could not be preloaded in an acceptable
time
Internal system error
Two or more units have the same CAN_ID (settings of the S5
dip switches (1 to 3) on the control board
Different units in a filter system have different control
firmwares (DSP and/or microcontroller)
Manual Power Quality Filter PQFS  Commissioning instructions 127