Mitsubishi Electric 800 Series Instruction Manual page 111

Inspection item
 Removal of the internal fan (FR-A846-00250(7.5K) to 00470(18.5K))
(1) Remove the inverter front cover. (Refer to page 15)
(2) Remove the installation screws, and then remove the protective cover.
Protective cover
Installation screw
(3) Move the fan connector case, and then remove the fan connector.
Fan connector
Connector case
(4) Remove the bracket.
Bracket
(5) Remove the installation screws, and then remove the fan.
Bracket
Fan
Installation screw
110
PRECAUTIONS FOR MAINTENANCE AND INSPECTION