YASKAWA varispeed G7 CIMR-G7B series Instruction Manual page 440

400 V Class Inverters of 300 kW
Removing the Cooling Fan
1. Remove the terminal cover, Inverter cover, Digital Operator, and front cover from the front of the Inverter.
2. Remove any cables that are connected to the cooling fan power relay board. The cable that is connected to
the terminal board can be removed together with the terminal board.
3. Remove the fan unit screws and pull out the fan units from the Inverter.
4. Replace the fan units with new ones.
And, remove the screws for the fan power relay board and attach this board to the new unit.
Mounting the Cooling Fan
After attaching a new cooling fan unit, reverse the above procedure to attach all of the components.
Front cover mounting screws
Top front
cover
Bottom
front
cover
Terminal cover mounting screws
Fan cover mounting screws
Fan cover mounting screws
Fig 8.12 Cooling Fan Replacement (400 V Class Inverters of 300 kW)
Fan cover
Terminal
cover
Enlarged
view
Fan units
Maintenance and Inspection
Fan power relay
board
Fan cover
Relay board mounting screws
Fan power relay
board
Fan airflow
derection
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