29
Remote control wiring for group control
NOTE
(1) See Section 4-2 for the explanation of “B”, “C”, “D”,
“E”, “F” and “G” under Section 4-3.
(2) The basic connection diagram of the indoor unit
shows the terminal boards, so the terminal boards in
your equipment may differ from the diagram.
(3) Refrigerant Circuit address should be set before
turning the power on.
(4) Regarding Refrigerant Circuit address setting, refer to
the installation instructions supplied with the remote
controller (Optional). Auto address setting can be
executed by remote controller automatically.
3P terminal board
4P terminal board
Inter-unit
control
wiring
Remote
control
wiring
Power supply
or
Connection cable
between outdoor
and indoor unit
Type Y3
CAUTION
(1) When connecting to the integrated control system, the setting of the terminating
resistance is required. Even more connection with the integrated control system is
required, all indoor units in the link of 3-line connection should be connected with
2-line link wiring.
● How to set the terminating resistance of the indoor unit
The setting of the terminating resistance should be made by CN045 on the indoor
unit control PCB.
The setting of indoor unit terminating resistance at shipment is OPEN side. If the
shorting socket is moved as shown below, the terminating resistance is SHORT
side (operative).
It is not necessary to install all units’ terminating resistance. Follow the steps on
the next page which unit’s terminating resistance to install.
Indoor unit control PCB
● How to set the terminating resistance of the outdoor unit
The setting of the terminating resistance should be made by CN-TERMINAL on the
outdoor unit control PCB.
The setting of the outdoor unit terminating resistance at shipment is SHORT side
(operative). Leave one unit in short circuit among outdoor units in the link.
Change to OPEN for other units. It is not necessary to install all units’ terminating
resistance to OPEN side.
It is not necessary to install all units’ terminating resistance. Follow the steps on
the next page which unit’s terminating resistance to install.
U1 U2 R1 R2
01_330918_EU_Eng.indb 29 2021/9/9 11:26:47
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