Service Manual

─ 45 ─
(4) Control parts (For LGH-F300RVX2-E to LGH-F600RVX2-E)
[3] Remove the screws (two PT screws 4×8, indicated by
), and remove the control circuit board.
Control circuit board
[4] Disconnect the connectors (indicated by ) from the
power circuit board.
Power circuit board
[1] Remove the control box cover. → See (2) [1].
[2] Check that LED4 (red) on the control circuit board is
OFF, and then disconnect the connectors (indicated by
) from the control circuit board.
Precaution
Before replacing the circuit boards, see (6) Procedures for replacing the circuit boards (page 49).
Control circuit board
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, disconnecting the live-line connectors
will cause a motor malfunction.
CN9
CN114
CN119
CN10
CN113
CN12
TAB1
TAB2
LED4
CN14
CN5
CN7
CN19
LED6
Assembly precaution
After connecting the
motor connectors
(CN9, CN10), check the
wiring inside the main
unit.
Push in the motor
leads until their cord
bands touch the cord
bush.
Push in the
leads.
Cord band
Cord bush