Group Control System; Dual Remote Controllers - Fujitsu ARYG LHTA 1ph Installation Manual

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
controller.
(1) Wiring method (indoor unit to remote controller)
Indoor unit 0 Indoor unit 1
1 2 3
1 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.
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.)
Refrigerant circuit
address
3. Set the "primary" and "secondary" settings. (Set the indoor unit that is connected to
the outdoor unit using a connection cable as the "primary".)
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
CAUTION
Indoor unit 2 Indoor unit 3
1 2 3 1 2 3 1 2 3
Bus wire
Indoor unit
Rotary Switch
Function Number Setting Value
02
Function Number Setting Value
51
Rotary switch setting
(unit number)
Remote controller
setting
 Refrigerant circuit
address
 Primary/Secondary
* Make sure that the indoor unit with the unit number 00 is connected to the outdoor unit
using a connection 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)
(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)
Number of remote
controllers
1 (Normal)
2 (Dual)
00~15
00
01
Standard Simultaneous
pair twin
Outdoor
Outdoor
unit 1 unit 2
Indoor Indoor Indoor
Remote
controller unit unit unit
00 01
00 01
00 00
: Connection cable, Power supply cable
: Remote controller cable
Indoor unit
1 2 3
When ground wire
is necessary
1 2 3
R W B
Primary unit
Remote controller
Primary unit
DIP SW 1 No. 2
OFF
OFF
Simultaneous
triple
Outdoor
unit 3
Indoor Indoor Indoor
unit unit unit
02 03 04 05
01 02 02 02
01 00 01 01
: Power supply cable
: Bus wire
Remote controller cable
1 2 3
R W B
Secondary
unit
Secondary unit
DIP SW 1 No. 2
–
ON