6
Troubleshooting and Maintenance
6-6 | CFW-11 RB
Electronic boards:
Cut off the converter supply and wait 10 minutes.
Remove the dust accumulated on the boards using an anti-static brush or ionized compressed air (E.g.: Charges
Burtes Ion Gun (non nuclear) reference A6030-6DESCO).
If necessary, remove the boards from the converter.
Use always an ESD wrist strap.
Inspect the heatsink fins of the power units regularly verifying if there is any dirt accumulation that could impair
the converter cooling. Therefore, remove the power unit side cover.
1 2 3
Releasing the latches of the fan cover Fan removal Cable disconnection
(a) Frame size E (only model CFW110105T4O...RB...)
1 2 3
Fan grill screws removal Fan removal Cable disconnection
(b) Frame size E (except model CFW110105T4O...RB...)
1 2 3
Fan grill screws removal Fan removal Cable disconnection
(c) Frame sizes F and G (example on size F)
Figure 6.1: (a) to (c) - Removal of the heatsink fans
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