Replacing The Roof-Mounted Fan - Siemens SINAMICS G120C USS/MB Operating Instructions Manual

9.2.8

Replacing the roof-mounted fan

Inverters, frame sizes FSAA ... FSC have a roof-mounted fan. The roof-mounted fan is located
at the upper side of the inverter.
When must the roof-mounted fan be replaced?
A defective roof-mounted fan in operation results in an overtemperature condition of the
inverter. For example, the following messages indicate that a roof-mounted fan is defective:
● A30034 (overtemperature inside the enclosure)
● F30036 (overtemperature, inside area)
● A30049 (defective fan inside the enclosure)
● F30059 (defective fan inside the enclosure)
Figure 9-2
Removing the roof-mounted fan
Procedure
Proceed as follows to remove the roof-mounted fan:
1. Switch off the inverter power supply.
2. Using a screwdriver, press the locking lugs of the roof-mounted fan together.
3. Withdraw the roof-mounted fan from the inverter.
SINAMICS G120C converter
Operating Instructions, 09/2017, FW V4.7 SP9, A5E34263257B AF
Removing and installing the interior fan
WARNING
Electric shock as a result of a residual charge in power components
After the power supply has been switched off, it takes up to 5 min. until the capacitors in
the inverter have discharged so that the residual charge is at a non-hazardous level.
● Check the voltage at the inverter connections before you carry out any installation work.
Corrective maintenance
9.2 Replacing inverter components
389