Maintenance and Inspection
8-15
2. Pull out the cables connected to the control circuit terminal board, the gate drive board, and the cooling fan
power relay board.
3. Remove the control board mounting panel.
4. Replace the circulation fan installed behind the control board mounting panel.
Mounting the Circulation Fan
Reverse the above procedure to mount the fan.
Be sure to mount the fan so that the air flows in the direction indicated by the arrow in the corresponding dia-
gram.
Confirm that there are no cables in contact with the fan’s rotating parts.
Refer to Fig 8.5 Cooling Fan Replacement (200 V Class Inverters of 75 kW) for details.
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