Service Manual

─ 10 ─
LGH-F940RVX2-E, LGH-F1200RVX2-E
* Wiring for TM1, TM2, TM3, TM4, and TB5 shown in dotted lines are field work.
* Be sure to connect the earth wire.
* An all pole electric leakage isolator must be installed.
* Always use an isolator for the main power connection.
9
10
S
A
B
1
2
1
2
NL
NL
TM1
Power supply terminal
SW5
SW6
SW2
TM2
TB5
TM4
TM3
PZ-62DR-EA
LED3
LED2
LED1
Y
Z
Monitor output
12 V or 24 V DC
Mr. Slim (non-polar)
Volt-free contact
M-NET transmission cable
2nd remote controller
(Max. 2 controllers)
2nd Lossnay unit
(Max. 15 units)
Isolator (Field supply)
POWER SUPPLY
208–230 V/60 Hz
LINE FILTER
Shielded Wire
X11
Control circuit board
LED4
CN21
CN14
CN13
CN35 CN5 CN7CN34
SW12 SW11
LINE FILTER
Lossnay unit
LED5
CN23
CN12
CN119
CN114
CN10
CN9
LED6
TAB1 TAB2
Supply fan
motor
Exhaust fan
motor
Supply fan
motor
Exhaust fan
motor
Power circuit board
(Lower unit)
CN113
REACTOR
M
1
M
2
GM
CN19
CN12
CN121
CN10
CN9
LED6
TAB1 TAB2
Power circuit board
(Upper unit)
CN113
REACTOR
M
1
M
2
GM
TH1
(OA)
TH2
(RA)
CN32
CN105
CN50 CN26 CN17
Definition of symbols
M1: Motor for exhaust fan
M2: Motor for supply fan
GM: Motor for Bypass damper
TH1: Thermistor for outdoor air
TH2: Thermistor for return air
SW2, 5: Switch (Function selection)
SW6: Switch (Model selection)
TM1: Terminal block (Power supply)
TM2: Terminal block (External control input)
TM3: Terminal block (Monitor output)
TM4:
Terminal block (Remote controller transmission cable)
TB5: Terminal block (M-NET transmission cable)
TAB1, TAB2: Connector (Power supply)
X11: Relay contact
CN5: Connector (Thermistor RA)
CN7: Connector (Thermistor OA)
CN9: Connector (Fan motor)
CN10: Connector (Fan motor)
CN12: Connector (Damper motor)
CN17: Connector (Fan speed 1/2/3/4)
CN13: Connector
CN14: Connector
CN113: Connector
CN114: Connector
CN19: Connector
CN119: Connector
CN21: Connector
CN121: Connector
CN23: Connector (CO2 sensor power supply)
CN26: Connector (Bypass switching/CO2 sensor input)
CN32: Connector (Remote control selection)
CN34: Connector (CO2 sensor output)
CN35: Connector (CO2 sensor input)
CN50: Connector (Optional components: External
monitor output)
CN105: Connector (For IT communication)
SW11: Address setting rotary switch (ones digit)
SW12: Address setting rotary switch (tens digit)
LED1: Inspection indicator lamp
LED2: M-NET indicator lamp
LED3:
Remote controller power supply indicator lamp
LED4, LED6: Power supply indicator lamp
LED5: CO2 sensor power supply indicator lamp
(When the CO
2 sensor is connected)
SYMBOL : Terminal block, : Connector on PCB
Select proper isolator according to the electrical current information in the chart below.
Model LGH-F940RVX2-E LGH-F1200RVX2-E
Maximum current when operating [A] 8.10 8.30
Inrush current after power
supply ON [A]
10 ms 12.2
100 ms 7.2