Connection Of Remote Controller Cable; Installation Methods; Group Control; Dual Remote Control - Fujitsu UTY-RNN*M series Installation Manual

5.3. Connection of Remote Controller Cable

• When connecting the remote controller cable to the wall mounted type
and the fl oor type indoor unit, do not connect it to the outdoor unit or
the indoor unit power terminal block. It may cause a failure.
There are 2 methods to connect the remote controller cable to the indoor
unit. One is the connection using contained connecting cable and the other
is the connection the remote controller cable is connected to the exclusive
terminal block of the indoor unit.
Exclusive terminal block for remote controller connection method is different
depending on each model. Modify the remote controller cable as per below
description and connect it.
(For the details, refer to the installation manual of the indoor unit to be used.)
5.3.1. WHEN CONNECTING TO THE WALL
MOUNTED TYPE AND THE FLOOR TYPE
CONNECTOR
Connect the remote controller cable to the connecting cable and insert it to
the connector.
Pattern 1
Connecting cable
Connector
Remote controller
cable
Pattern 2
Connecting cable Communication
kit (option)
Remote controller
Connector
cable
Modify the cable as per below methods.
(1) Use a tool to cut off the terminal on the end of the remote controller cable
and then remove the insulation from the cut end of the cable as shown
in Fig. 1.
(2) Connect the remote controller cable and connecting cable as shown in
Fig. 2.
(3) Be sure to insulate the connection between the cables.
Fig. 1
Remote
controller cable
Remote
controller cable
5.3.2. WHEN CONNECTING TO THE EXCLUSIVE
TERMINAL BLOCK
Connect the end of remote controller cable directly to the exclusive terminal
block.
M4 screw
Terminal block
CAUTION
Indoor unit
Outdoor
unit /
PCB
power
supply
terminal
block
Indoor unit
Outdoor
unit /
PCB
power
supply
terminal
block
Fig. 2
Connector
White
Red
White
Black
Red
Insulated
connection
Connecting
cable
Black
*
Black
3
White
2
Red
1
Indoor unit
side
* Earth (Ground) the remote
controller if it has an earth
(a ground) wire.
Remote controller
Remote controller
cable
terminal block
It may be failed if it is connected to the outdoor unit or the terminal block
for power supply.

6. INSTALLATION METHODS

d

6.1. Group control

• A number of indoor units can be operated at the same time using a single
remote controller.
• Depending on the model, some indoor units cannot be connected for
group control. (Group control is available for the duct type, the cassette
type and the ceiling type indoor unit.)
• Some functions may become unusable, depending on the combination of
the indoor units that are connected in a group.
(1) Wiring method (indoor unit to remote controller)
EXAMPLE: Single Type
Indoor unit 0 Indoor unit 1
1 2 3 1 2 3
1 2 3
Remote controller
cable
Remote controller
When there is an earth (a ground) cable.
(2) Indoor unit address setting
Set each indoor unit address using the DIP switch of each indoor unit.
(Refer to the installation manual for the indoor unit.)
6.2. Dual remote controllers
• Depending on the model, some indoor units cannot be connected for dual
remote controllers. (Dual remote controllers are available for the duct
type, the cassette type and the ceiling type indoor unit.)
• Two separate remote controllers can be used to operate the indoor units.
• The timer and self-diagnosis functions cannot be used on the slave units.
(1) Wiring method (indoor unit to remote controller)
Indoor unit
1 2 3
When there are
earth (ground)
cables.
1 2 3
Master unit
Remote controller
Outdoor unit /
power supply
terminal block
Indoor unit
PCB
Indoor unit 2 Indoor unit 3
1 2 3 1 2 3
Remote controller cable
1 2 3
Slave unit
En-4