Maintenance and service
6.5 Forming the DC link capacitors
Air-Cooled Chassis Power Units - supplement to Motor Module 6SL3320-1TG41-5AA3
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Equipment Manual, 10/2020, A5E50422764A
6.4.6
Replacement of the fan fuses
The Motor Module has integrated fan fuses (-F10/-F11/-F20/-F21), which can be replaced in
the event of rupture.
Article numbers for replacing fan fuses that have blown can be found in the spare parts list.
Note
Removing fault causes
Make sure that the cause of the fault is found before the fuse is replaced.
6.5
Forming the DC link capacitors
Description
If the Motor Modules are kept in storage for more than two years, the DC link capacitors must
be reformed. If this is not carried out, the units could be damaged when the DC-link voltage is
connected under load.
If the cabinet is commissioned within two years of its date of manufacture, the DC-link
capacitors do not need to be re-formed. The date of manufacture can be taken from the serial
number on the rating plate.
Note
Storage period
It is important that the storage period is calculated from the date of manufacture and not
from the date that the equipment was shipped.
