38 Maintenance
Cleaning the air-to-air cooling element
The external cooling air flows through the cooling elements at the middle of the main
cooling channel. When it is necessary, clean the cooling elements with a vacuum cleaner.
WARNING! Obey the safety instructions on page 5. If you ignore the
instructions, physical injury or death, or damage to the equipment can
occur.
WARNING! Clean the cooling element carefully to prevent damage to it.
1. Before you start, stop the inverter and do the steps in Electrical safety on page 6.
2. Remove the protection grilles at the front of the inverter.
3. Remove the main channel cooling fans.
4. Use a vacuum cleaner to clean the cooling elements. Make sure that you use a soft-
bristled brush or a non-sharp plastic nozzle.
5. Install the main channel cooling fans.
6. Attach the protection grilles back to the front of the inverter.
7. Repeat the procedure for the LCL cooling channel at the back of the inverter.
Note: The direction of the cooling air flow depends on the position of the fans.
Refer to the project documentation.
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