ABB PQFM Instruction Manual page 212

Table 64: Fault messages reported by the DSP controller of the filter and troubleshooting tips
Fault message
Bad parameters
Bad message
sequence
Bad CT connection
DC overvoltage (SW)
212 Troubleshooting guide ç Manual Power Quality Filter PQFM
Cause
The filter parameters
entered by the
commissioning engineer
are not consistent with
the filter configuration
reported by the
controller.
Internal system error
The automatic CT
detection procedure has
encountered a problem
during the CT
identification process.
The DC software
overvoltage protection
has been triggered.
What to do
Check the commissioning parameters
and correct where necessary.
(Cf. Chapter 8)
Contact your ABB service provider. Most
likely the controller software has to be
upgraded or the main controller card
replaced.
- Check that the CTs are installed on
the supply side of the filter.
- Check that the CTs are not shorted.
- Check that the overall CT ratio
(including summing CTs) is smaller
than 20000/5.
- Set up the CTs manually (Cf. Section
8.6)
- Check the connection between the
DC voltage measurement connector
(P6-5 and P6-7) and the DC
capacitors.
- Check flat cable connections between
the Control Board and the IGBT
module.
- Analyze network voltage stability
(amplitude and phase).
- Disable reactive power compensation
and balancing options to see if the
problem persists.
- Deselect the high frequency
components to free DC bus resources
and to see if the problem persists.