Special Installation Methods - Fujitsu Ceiling Type Installation Manual

If no buttons are pressed within 30 seconds after the signal code is displayed, the sys-
tem returns to the original clock display. In this case, start again from step 1.
The air conditioner signal code is set to A prior to shipment.
Contact your retailer to change the signal code.
The remote controller resets to signal code A when the batteries in the remote controller
are replaced. If you use a signal code other than signal code A, reset the signal code
after replacing the batteries.
If you do not know the air conditioner signal code setting, try each of the signal codes
( ) until you fi nd the code which operates the air conditioner.

9.4. Special installation methods

This possible only the wired remote controller (Option)
When setting DIP switches, do not touch any other parts on the circuit board directly
with your bare hands.
Be sure to turn off the main power.
9.4.1. Simultaneous multi-system operation
• By combining with an outdoor unit, 2 units for twin and 3 units for triple indoor units, can
be switched ON/OFF simultaneously.
(1) Wiring method
• Refer to 6.ELECTRICAL WIRING for wiring procedure and wiring method.
• The indoor unit is connected the outdoor unit using a transmission cable is "primary".
• Connect the remote controller wire to the primary unit.
Twin type ( 18, 22, 24 type only )
Remote
controller
Triple type ( 18type only )
Outdoor
unit
Remote
Indoor
controller
unit 1
[primary]
: Transmission cable, Power supply cable
: Remote controller cable
(2) Set the R.C. address (DIP switch setting )
Set the R.C. address of each indoor unit using the DIP switches on the indoor unit
circuit board. (See the following table and fi gure.)
The DIP switches are normally set to make the R.C. address 00.
Indoor unit R.C. address
00
1
01
2
02
3
Circuit board in the control box of indoor unit.
En-11
CAUTION
Outdoor
unit
Indoor Indoor
unit 1 unit 2
[primary]
[secondary]
Indoor Indoor
unit 2 unit 3
[secondary] [secondary]
: Power supply cable
: Bus wire
DIP SWITCH No.
1 2 3
OFF OFF OFF
ON OFF OFF
OFF ON OFF
DIP switches
Example :
R.C. address 02
ON
NOTE
Be sure to set the R.C. address sequentially.
(3) Set the primary and secondary (Remote controller setting)
1. Turn on all of the indoor units.
2. Set the "primary" and "secondary" settings.
(Set the indoor unit that is connected to the outdoor unit using a transmission cable
as the "primary".)
Primary
Secondary
3. 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.
Twin type ( 18, 22, 24 type only )
Remote
controller
R.C. address
(DIP switch setting)
Primary/Secondary setting
(Function number 51)
Triple type ( 18type only )
Remote
controller
R.C. address
(DIP switch setting)
Primary/Secondary setting
(Function number 51)
: Transmission cable, Power supply cable
: Remote controller cable
9.4.2. Group control system
4
OFF
OFF
Group control cannot be used when using it by the fl exible multi type.
OFF
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 1
Remote controller
When ground wire is necessary
Function Number
51
Out door
unit
Indoor
unit 1
[primary]
00
00
Out door
unit
Indoor Indoor
unit 1 unit 2
[primary]
[secondary]
00 01
00 01
CAUTION
Indoor Indoor
unit 2 unit 3
1 2 3 1 2 3 1 2 3
Bus wire
1 2 3
Remote
controller cable
Setting Value
00
01
Indoor
unit 2
[secondary]
01
01
Indoor
unit 3
[secondary]
02
01
: Power supply cable
: Bus wire
Indoor
unit 4
1 2 3