Remote Controller Wiring And Connection Procedure; Controlling Multiple Indoor Units Using A Single Remote Controller - Mitsubishi Heavy Industries FDTC50ZHXV Technical Manual

5) Set the same address for the master and slave indoor units as the communications address for the remote controller using
rotary switch SW2 on the indoor units' control PCB.
6) Set slave a, slave b and slave c using DIP switch SW5-1 and SW5-2 on the control PCB of the respective indoor slave units.
7) Be sure to press the AIR CON No. button on the remote controller after turning on the power, then check if the indoor master
and slave unit No. is displayed in the remote controller.
The indoor unit address is displayed when the AIR CON No. button is pressed. After that, pressing the
the unit No. beginning from the lowest No.
8) Plural Master / Slave setting
Set the plural address switches SW5-1 and SW5-2 on the
indoor control PCB as shown in the table right.
(e) Remote controller wiring and connection procedure
1) Master-slave settings when using multiple remote controllers
Up to 2 remote controllers can be connected for each indoor unit (or group).
●
a) There are two methods, one where the remote controller signal line (3-wire) for the slave remote controller is taken
from the indoor unit and the other where the signal lines are taken from the master remote controller.
b) Set the SW1 select switch on the slave remote controller on the Slave setting. (It is set on the Master setting at the fac-
tory.)
Note (1) Remote controller thermistor activation settings are possible only with the master remote controller. Install the master remote controller in a
location where it can sense the room temperature.

2) Controlling multiple indoor units using a single remote controller.

Up to 16 indoor units can be controlled with a single remote controller.
●
a) Run 2-wire remote controller lines between each of the indoor units. See "Installation and wiring of remote controller"
on page 218 concerning extended remote controller lines.
b) Set the remote controller communications address on "0" ~ "F" using rotary switch SW2 on the indoor unit's control
board, taking care not to overlap the addresses of any of the units.
c) After turning the power on, press the AIR CON No. button to display the indoor unit's address. Be sure to confirm that
the settings are displayed correctly in the remote controller by using the
each connected indoor unit.
Indoor unit
X Y
X Y
Remote
SW1
controller
Master
Function
Switch
M Master remote controller
SW1
S Slave remote controller
Indoor unit (1) Indoor unit (2)
X Y
Address [0] Address [1]
X Y
Remote controller
-
Master setting at time of
factory shipment
SW5-1
DIP switch
SW5-2
Remote control signal line (no polarity)
X Y
Remote
SW1
controller
Slave
M
S
SW1
Indoor unit (16)
X Y
Address [F]
Remote controller signal line (no polarity)
232
-
or
Indoor unit
Master Slave a Slave b
OFF OFF ON
OFF ON OFF
Upper
SW2
SW1
PCB
Lower
X Y
and buttons to display the address of
key displays
Slave c
ON
ON