Maintenance 315Cooling fanThe actual lifespan of the cooling fan depends on the drive usage and ambienttemperature. Fan failure can be predicted by the increasing noise from fan bearingsand the gradual rise in the heatsink temperature in spite of heatsink cleaning. If thedrive is operated in a critical part of a process, fan replacement is recommendedonce these symptoms start appearing. Replacement fans are available from ABB. Donot use other than ABB-specified spare parts. Fan replacement (Frame size B)Detach the power cable clamp plate and terminal blocks. Release the retaining clips(arrowed) carefully using a screwdriver. Pull the fan holder out. Disconnect the fancable. Carefully bend the clips on the fan holder to free the fan.Install the new fan in reverse order.Note: The airflow direction is bottom-to-top. Install the fan so that the airflow arrowpoints up.Airflow direction
