YASKAWA varispeed G7 CIMR-G7B series Instruction Manual page 438

200 V Class Inverters of 90 kW and 110 kW/400 V Class Inverters of 132 kW and 160 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 the panel to which the control board, the gate drive board, and the cooling fan power relay board
are mounted. Remove any cables that are connected to the control board, the gate drive board, and the
cooling fan power relay board. The cable that is connected to the control circuit terminals can be removed
together with the control circuit terminal board. (Refer to page 8-21)
3. Remove the fan cover screws and pull out the fan cover from the Inverter.
4. Remove the cooling fan from the fan cover and replace it with a new one.
Mounting the Cooling Fan
After attaching a new cooling fan, reverse the above procedure to attach all of the components.
When attaching the cooling fan to the mounting bracket, be sure that the airflow faces the top of the Inverter.
Front cover mounting screws
Terminal cover mounting screws
Circulation fan mounting screws
Fan cover mounting screws
Fan power relay board
* 1. There is no finger guard mounted to the fan for some capacities. (There is a guard on the Inverter side.)
* 2. There is no fan ground cable for the capacities without a finger guard.
Fig 8.10 Cooling Fan Replacement (200 V Class Inverters of 90 kW and 110 kW)
Fan cover Fan cover mounting screws
Fan power
relay board
Gate drive
board
Front cover
Control board
Terminal
cover
Circulation fan
Fan cover
Fan airflow
direction
Fan ground cable
Maintenance and Inspection
Circulation fan
airflow direction
Fan cover
Fan mounting
screws
Finger guard *1
Cooling fan
*2
13
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