When Removing The Power Circuit Boards Or Reactors; Upper Unit; Lower Unit - Mitsubishi Electric LGH-F300RVX-E Handbook

When removing the power circuit boards or reactors

[1] Unscrew the screws (eight PT screws 4×8,
indicated by ) to remove the control box
cover.
[2] Remove the circuit boards and reactors.

[Upper unit]

a. Disconnect the connectors (indicated by
).
Precaution
When disconnecting the motor connec-
tors, make sure that the power supply is
turned off. Even when the fan motor is
stopped, disconnecting the live-line con-
nectors will cause a motor malfunction.
Assembly precaution
After connecting the motor
connectors, check the wir-
ing inside the main unit.
If the motor leads are slack
and are likely to interfere
with the removal/insertion
of the Lossnay cores, draw
the motor leads into the control box.
Pay attention not to allow the motor
leads to contact the components on the
circuit board.
b. Unscrew the screw (one PT screw 4×8 BS, indicated by ) and the lock washer (4).
c. Unscrew the screw (one PT screw 4×8, indicated by
d. Unscrew the screws (two PT screws 4×8, indicated by

[Lower unit]

a. Remove the control circuit board. → See (5) [2] and [3] (on page 43).
b. Remove the power circuit board. → See (4) [4] to [6] (on page 41 and 42).
c. Remove the reactor. → See (4) [7] to [9] (on pages 42 and 43).
When reassembling
Reassemble the unit in the reverse order of disassembly.
After reassembly, always make a test run to be sure that
the unit operates properly.
Control box cover
Power circuit board (upper)
(LG-X07DC-E1)
Power circuit board
(LG-X07DC-E . P)
), and remove the power circuit board (upper).
), and remove the reactor.
─ 44 ─
Control circuit board
(LG-X07DC-E . C)
Reactor