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A: The cooling fan for the inverter has a lifespan exceeding 25,000 operating hours. Actual service life depends on inverter usage and ambient temperature. Check the inverter's operating time via P07.14 (Cumulative Operating Time). An increase in bearing noise typically indicates impending fan failure.
Fan Replacement Guide:
1. Shut down the unit and disconnect the AC power supply. Wait for at least the time specified on the inverter.
2. Use a screwdriver to pry the fan mounting plate from the cabinet, then lift the plate upward. Disconnect the fan cable from the terminal block.
3. Remove the fan cable and take out the fan mounting plate.
4. Reinstall the fan mounting plate onto the VFD in reverse order. Ensure the fan's airflow direction aligns with the VFD's airflow direction.
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