Mitsubishi Electric Lossnay LGH-50RVS-E Handbook page 36

( 1 ) Turning power off
[1] Shut down the unit.
[2] Turn off the power supply isolator.
Precaution
When servicing, power supply to M-NET must be turned
off. Live-line working may cause a circuit board failure.
( 2 ) Fan parts
[1] Remove the black screws (three special screws 4×8,
indicated by ) to remove the control box cover.
[2] Check that LED4 on the control circuit board is OFF,
and then disconnect the motor connectors (CN9 and
CN10, indicated by
Precaution
When disconnecting the motor connectors, make sure
that the power supply is turned off and all LEDs are
unlit. Even when the fan motor is stopped, discon-
necting the live-line connectors will cause a motor
malfunction.
Assembly precaution
After connecting the motor connectors
(CN9, CN10), tuck the excess leads into
the main unit.
[3] Loosen the screws (four special screws 4×14, indi-
cated by and
remove the cover.
* Notes:
• Upper two screws (indicated by
the keyhole fittings "
remove the cover.
• Lower two screws (indicated by
tion washer, so they will not come off from the cover.
Precaution
All screws for the maintenance cover are not neces-
sary to be removed from the unit, but if some screws
come out from the unit, tighten them to the original
positions.
) from the power circuit board.
Push in
the leads.
) on the maintenance cover A, and
) are fastened with
", loosen them enough to
) have fall protec-
Control circuit board
─ 36 ─
Control box cover
Power circuit board
CN9
CN10
Maintenance cover A