Download INSTALLATION MANUAL

Setup of P.C. Board Switch
When the units controlled collectively are all digital inverter air conditioners, it is required to set up the terminator
resistor. (Collective control for units without VRF type air conditioner)
• Using SW01, set up the terminator resistor.
• Set up the terminator resistor to only interface connected to the indoor unit in the line with the least line
address No.
Central control
device
Central control
device
U1 U2
U3 U4
U1 U2
U3 U4
Central control device: Max. 10 units
Refrigerant
line 1
Refrigerant
line 2
Refrigerant
line 3
Refrigerant
line 4
Outdoor
unit
123
123
123
123
Wiring between indoor
and outdoor units
Wiring of central control system
* Wiring for No. 1 and 2 only
Indoor unit
U3 U4
“1 : 1 Model”
Connection Interface
(option)
123
U3 U4
Header
123
AB
AB
Remote
controller
Remote
controller
Follower
123
AB
Remote
controller
wiring
1
ON
OFF
Remarks
Turn on
SW01 bit 1.
AB
Header
123
AB
Remote
controller
Group control (Max. 8 units)
Line address
SW01 bit 1
SW01 bit 2
Follower
U3 U4
123
2
OFF
OFF
As status at
shipment
from factory
Twin system
4
OFF
OFF
As status at
shipment
from factory
(OFF when shipped from factory)
(OFF when shipped from factory)
(Reference) Contents of switch setup
SW01
Bit 1
Bit 2
Terminator
resistor
Remarks
OFF
OFF
None
Mixed with VRF at shipment from factory (Link wiring)
ON
OFF
100Ω
Central control by digital inverter air conditioners
OFF
ON
75Ω
Spare
ON
ON
43Ω
Spare
4