9.4 Maintenance
9.4.1 Replacing a fan
NOTICE
Improper fan storage
Even if the fan is not used, the bearing grease ages. The utility of the fan can be impaired.
Rotate the fan at least once a year. Do not store the fan for longer than two years before
commissioning.
CAUTION
Temperature-controlled rotating fan
If the converter is equipped with a temperature-controlled fan, the fan can run on even if the
power section is switched off.
You can be injured if you touch the fan.
Wait until the fan has shut down.
The fans must also be fitted with a monitoring device to ensure that the converter operates
reliably. Replace the fan in a timely manner in order to maintain the availability of the converter.
Removing the fan
1. Disconnect the equipment.
2. Switch off the motor protection switch.
3. Remove the mesh cover on the junction box side of the fan. To do this, remove the seven
screws of the mesh cover.
4. Open the cover of the junction box and remove the fan cables.
5. The fan is attached to the roof section using four nuts, which are located inside the fan.
Remove the four nuts including the contact washers. If required, also remove the mesh
cover on the other side.
6. Lift the fan out of the converter. Eyebolts can be fitted on top of the fan so that it can be
lifted out of the converter more easily.
CAUTION
The fan can fall down
The fans are very heavy (approx 50 kg).
They can cause injury or material damage if handled improperly.
Please take special care when removing the fans from the converter.
Maintenance
9.4 Maintenance
SINAMICS GL150 6SL38503UM114PA0Z
Operating Instructions 04/2017 109
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