Mitsubishi Electric LGH-F300RVX2-E Handbook page 12

(2) Power circuit board
There are three types of the power circuit board. The type of the power circuit board varies depending on the
model of the Lossnay unit.
When replacing the circuit board, use the applicable circuit board according to the table below.
Power circuit board
LG-X08DC-P4
LG-X08DC-P6
LG-X08DC-P5
LG-X08DC-P6
Caution:
The power circuit consists of live parts. The power circuit board is not insulated from the power line,
except for the connection part with the control circuit board. Before servicing (including replacing
the circuit boards), be sure to turn off the power supply isolator and check that all the LEDs on the
control circuit board and power circuit board are not lit. A large-capacity electrolytic capacitor on the
circuit board may carry voltage for several minutes after the isolator is turned off.
CN9
Exhaust fan motor
Pin No. of the connector
[1] Power for the motor: 325 V DC
[4] GND
[5] Power for motor control: 15 V DC
[6] Speed command voltage: 0 to 6 V DC
[7] Rotational speed pulse
CN121
Control circuit board
connection [2] (*Note 1)
CN114, CN119, CN113
Control circuit board
connection
CN12
Damper motor output
208 to 230 V/60 Hz
Fuse1
10 A/250 V
*Note 1:
The connection is available only for the following models.
LGH-F940RVX2-E, LGH-F1200RVX2-E
Lossnay unit
LGH-F300RVX2-E, LGH-F380RVX2-E
LGH-F470RVX2-E, LGH-F600RVX2-E
LGH-F940RVX2-E, LGH-F1200RVX2-E
(Equipped with two types of the power circuit board)
Power supply indicator
for motor control
(LED6 Red)
Fed with power: lit
Not fed with power: unlit
TAB1, TAB2
Power supply input
208 to 230 V/60 Hz
TAB1 is connected to the
power supply via the reactor.
CN10
Supply fan motor
Pin No. of the connector
[1] Power for the motor: 325 V DC
[3] GND
[4] Power for motor control: 15 V DC
[5] Speed command voltage: 0 to 6 V DC
[6] Rotational speed pulse
Lot number indication
─ 12 ─
Circuit board name
GND
(Insulated)
Power for the circuit
13 V DC
(Insulated)
Power for the circuit