Fan Replacement - ABB PQFM Instruction Manual

10.4 Fan replacement

The cooling fan lifespan is between 4 and 7 years typically, depending on the usage and
ambient temperature. Check the actual fan operating hours with the PQF-Manager
([/Welcome/PQF monitoring/PQF operation]).
Fan failure is often preceded by increasing noise from the bearings and rise of the
heatsink temperature despite cleaning. It is recommended to replace the fan once these
symptoms appear. Contact your ABB service provider for replacement fans for your
system.
In order to exchange the main IGBT cooling fan, follow the instructions below:
- Ensure that the power to the filter is switched off and that there is no residual
voltage left in the filter panel (e.g. DC capacitors).
- Remove the electrical connection of the fan by unplugging the relevant wires of
the X23 terminal.
104 can be used to locate the relevant items.
- Remove the fan mechanically by unscrewing its fixation screws which are located
at the top side of the fans in the aluminium fan outlet and on the filter baseplate.
- Remove the fan capacitor by unscrewing it from the filter baseplate.
- Replace the components, fix them mechanically and make the electrical
connections. Refer to the fan label to know which fan wire has to be connected to
which X23 terminal. Ensure that the electrical connections of the fan and the fan
capacitor are correct before powering on the system.
Figure 103 shows the terminal layout and pin assignment.
Fan
Fan capacitor
Fan power supply between 103 and 102
Fan capacitor between 102 and 'NC'
Figure 103: X23 pin layout and connection diagram
X23
1
2
3
4
NC
Manual Power Quality Filter PQFM ç Operating instructions 197
Figure
102
103