Fujitsu 9379123037-02 Installation Insrtuctions - Page 12

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8.3. Group control system

• When setting rotary switch, do not touch any other parts on the circuit board directly

with your bare hands.

• Be sure to turn off the main power.

A number of indoor units can be operated at the same time using a single remote control-

ler.

(1) Wiring method (indoor unit to remote controller)

Indoor unit 0

Indoor unit 1

1 2 3

2 3

R W B

Remote

controller cable

Remote controller

When ground wire is necessary

(2) Rotary switch setting (indoor unit)

Set the unit number of each indoor unit using the rotary switch on the indoor unit circuit

board.

The rotary switch is normally set to 0.

Rotary Switch

NOTE

Be sure to set the unit numbers sequentially.

(3) Remote controller setting

1. Turn on all of the indoor units.

* Turn on the indoor unit with the unit number 00 last. (Within 1 minute)

2. Set the refrigerant circuit address. (Assign the same number to all of the indoor units

connected to an outdoor unit.)

Function Number

Refrigerant circuit

address

3. Set the "primary" and "secondary" settings. (Set the indoor unit that is connected to

the outdoor unit using a transmission cable as the "primary".)

Function Number

Primary

Secondary

4. After completing the function settings, turn off all of the indoor units, and then turn

them back on.

* If error code 21, 22, 24, or 27 is displayed, there may be an incorrect setting.

Perform the remote controller setting again.

NOTE

• When different indoor unit models are connected using the group control system, some

functions may no longer be available.

• If the group control system contains multiple units that are operated simultaneously, con-

nect and set the units as shown below.

• Auto-changeover operates under the same mode with model unit number 00.

• It should not be connected to any other Gr that is not of the same series (A**G only).

En-12

9379123037-02.indb 12

CAUTION

Indoor unit 2

Indoor unit 3

1 2 3

Bus wire

Indoor unit

Setting Value

00~15

Setting Value

Standard

Simultaneous

pair

Outdoor

unit 1

unit 2

Indoor

Remote

controller

unit

Rotary switch setting

(unit number)

Remote controller

setting

 Refrigerant circuit

address

 Primary/Secondary

: Transmission cable, Power supply cable

: Remote controller cable

* Make sure that the indoor unit with the unit number 00 is connected to the outdoor unit

using a transmission cable.

8.4. Dual remote controllers

• Two separate remote controllers can be used to operate the indoor units.

• The timer and self-diagnosis functions cannot be used on the secondary units.

(1) Wiring method (indoor unit to remote controller)

Indoor unit

1 2 3

When ground wire

is necessary

1 2 3

R W B

Primary unit

Remote controller

(2) Remote controller DIP switch 1 setting

Set the remote controller DIP switch 1 No. 2 according to the following table.

(Refer to 7.2. Setting the dip switches)

Primary unit

Number of remote

controllers

DIP SW 1 No. 2

1 (Normal)

OFF

2 (Dual)

OFF

Simultaneous

twin

triple

Outdoor

unit 3

Indoor

unit

: Power supply cable

: Bus wire

Remote controller cable

1 2 3

R W B

Secondary

unit

Secondary unit

DIP SW 1 No. 2

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7/4/12 3:47 PM