Maintenance 135
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 16)
before you start the work.
2. Remove the drive module from the cabinet. See section Replacing the drive and LCL
filter modules (frame R11) (page 144).
3. Remove the module cooling fans. See section Fans below.
4. Blow dry clean compressed air (not humid) from bottom to top and simultaneously use
a vacuum cleaner at the air outlet to trap the dust. Note: If there is a risk of dust
entering adjoining equipment, perform the cleaning in another room.
5. Reinstall the cooling fans.
Power connections and quick connectors
Retightening the power connections
WARNING! Obey the instructions in chapter Safety instructions. If you
ignore them, injury or death, or damage to the equipment can occur.
1. Stop the drive (if running) and do the steps in section Electrical safety precautions
(page 16) before you start the work.
2. Check the tightness of the cable connections. Use the tightening torques given in
chapter Technical data.
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