MITSUBISHI ELECTRIC FR-S520 - Manual (Page 164)

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Removal
1) Remove the front cover and wiring
cover. (Refer to the instruction
manual (basic).)
2) Unplug the fan connector.
The cooling fan is connected with
the cooling fan connector on the
side of the inverter terminal block.
Unplug the connector to disconnect
the inverter and cooling fan.
3) Remove the cooling fan cover.
Remove the cover by disengaging
the fixing catches indicated by the
arrows.
AIR FLOW
4) Remove the cooling fan and cooling fan cover.
The cooling fan is secured by the fixing catches.
Disengaging the fixing catches removes the cooling fan and cooling fan cover.
Reinstallation
1) After confirming the orientation of
the fan, reinstall the fan to the cover
so that the arrow on the left of "AIR
FLOW" faces in the opposite
direction of the fan cover.
CAUTION
If the air flow is set in the wrong
direction, the inverter life can be shorter.
2) Reinstall the fan cover to the inverter.
Run the cable through the wiring
groove to prevent it from being caught
between the chassis and cover.
3) Reconnect the cable to the connector.
4) Reinstall the wiring cover.