Mitsubishi Electric FR-D720-0.2K-G Instruction Manual page 279

Inspection items
(1) Cooling fan
The replacement interval of the cooling fan used for cooling the parts generating heat such as the main circuit semiconductor
is greatly affected by the surrounding air temperature. When unusual noise and/or vibration is noticed during inspection, the
cooling fan must be replaced immediately.
Removal
1) Push the hooks from above and remove the fan
cover.
2) Disconnect the fan connectors.
3) Remove the fan.
NOTE
 Installing the fan in the opposite of air flow direction can cause the drive unit life to be shorter.
 Prevent the cable from being caught when installing a fan.
 Switch the power OFF before replacing fans. Since the drive unit circuits are charged with voltage even after power
OFF, replace fans only when the drive unit cover is on the drive unit to prevent an electric shock accident.
276
Fan cover
Fan connector
Fan
Example for FR-D720-1.5K-G
Reinstallation
1) After confirming the orientation of the fan, reinstall
the fan so that the arrow on the left of "AIR FLOW"
faces up.
<Fan side face>
2) Reconnect the fan connectors.
3) When wiring, avoid the cables being caught by the
fan.
4) Reinstall the fan cover.
2. Insert hooks until you
hear a click sound.
AIR FLOW
1. Insert hooks
into holes.