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2. Before Installation
How to Use the SYSTEM CONTROL Interface.
Functions
Connecting with M-NET system (Fig. 2-1)
The room air conditioner can be managed centralized or individually by the system controller using M-NET communications control.
Used as wired remote controller (Fig. 2-2)
MA remote controller can be used as a wired remote controller.
Remote control (Fig. 2-3)
Contact signals enable inputting of ON/OFF, prohibiting/allowing operation, and heating/cooling.
Status indicator output (Fig. 2-4)
Signals of ON/OFF, error/normal, heater ON/OFF, and humidifier ON/OFF are output.
Sample System Configuration
8
2
1
4
5
3. Function and electric wiring of interface each part
Indoor unit
To CN105
Function setting switch A
*Refer to section 4 "Dip
Switch Details" for details.
Function setting switch B
*Refer to section 4 "Dip
Switch Details" for details.
LED for checking communica-
tions with connected equipment
*Refer to section 13 "Interface
status monitor" for details.
M-NET address setting switch
*Refer to section 8 "Connecting
3
Fig. 2-1
2
3
Fig. 2-2
2
3
Fig. 2-3
To use centralized control by
M-NET
MELANS system controller
M-Net1
M-Net2
B2
A2
B1
A1
TB520
ON
SW500
1 2 3 4 5 6 7 8
ON
SW502
1 2 3 4 5 6 7 8
(Orange)(Red)
0
SW501
SW510
M-Net
Refrigerant address setting switch
*Refer to section 9 "Connecting with
with M-NET system" for details.
MA remote controller" for details.
6
5
7
1 System controller, etc
2 SYSTEM CONTROL
Interface
3 Indoor Unit
4 MA remote controller
5 Contract point
To use MA remote controller
MA remote controller
TB521
TB580 MA
B
A
R2 R1 C
S
(Orange)
CN560
(White)
0
0
MA
SW580
9
2
Fig. 2-4
6 Relay
7 Coil
8 Power supply unit for
M-NET transmission line
9 External power supply
for DC 12 V
Status of room air
conditioner output
Relay items, such as
heater and humidifier, etc.
connected to the relay.
DC power
supply (12 V)
TB571
TB530
-
+
LED for checking communica-
tions with connected equipment
(Gray)
(Sky Blue)
*Refer to section 13 "Interface
status monitor" for details.
CN591
(White)
Card key, Coin timer, etc.
To input control signal
and control room air
conditioner remotely
3
3
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