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9.2.3 Fan Maintenance
If the inverter has an external fan, when the fan fails to work normally, the inverter cannot be
effectively cooled, which will affect the efficiency of the inverter or cause derated operation.
Therefore, keep the fan clean and replace the damaged fan in time.
• Power off the inverter and disconnect it from all power supplies before main-
taining fans.
• After the inverter is powered off for 10 minutes, measure the voltage and cur-
rent with professional instrument. Only when there is no voltage nor current
can operators who wear protective equipment operate and maintain the inverter.
• Fan maintenance must be performed by professionals.
step 1 Refer to "8.1 Disconnecting the Inverter" to stop the inverter.
step 2 Refer to "5 Electrical Connection" and disconnect all the cable connections in reverse steps.
step 3 Refer to "4 Mechanical Mounting" and dismantle the inverter in reverse steps.
step 4 Unscrew the screws on the fan bracket.
step 5 Lift the fan bracket upwards, press down the protrusion on the fan power plug connector and
pull it outwards, and remove the fan bracket.
User Manual 9 Troubleshooting and Maintenance
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