￭ Outlet (roof) filters (IP54 / UL Type 12)
1. Remove the front and back gratings of the fan cubicle by lifting them upwards
2. Remove the air filter mat.
3. Place the new filter mat in the grating.
4. Reinstall the grating in reverse order.
Heatsink
The drive module heatsink fins pick up dust from the cooling air. The drive runs into
overtemperature warnings and faults if the heatsink is not clean. When necessary, clean
the heatsink as follows.
WARNING!
Obey the instructions in chapter Safety instructions. If you ignore them,
injury or death, or damage to the equipment can occur.
WARNING!
Use a vacuum cleaner with antistatic hose and nozzle. Using a normal vacuum
cleaner creates static discharges which can damage circuit boards.
1.
Stop the drive and do the steps in section Electrical safety precautions (page 20) before
you start the work.
138 Maintenance
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