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2
In all the outdoor units connected to the central control, make sure the relay connector of the interface
P.C. board "CN10" has not been connected to the "CN02".
NOTE
If you connect a relay connector "CN10" to "CN02", the communication line [U1, U2] will be connected to [U3, U4].
If [U1, U2] is connected to the [U3, U4], refrigerant line address cannot be set correctly.
)
[U1, U2] and [U3, U4] not connected
CN02
3
Turn on the indoor units first, and then turn on the outdoor units.
4
About 1 minute after turning the power on, confirm that the 7-segment display on the interface P.C. board
of the outdoor unit indicates
U. 1. L08 (U. 1. flash)
5
Push and hold SW15 for more than 5 seconds to start the automatic address setting.
(It may take up to 10 minutes (normally about 5 minutes) to complete one line's setting.)
6
The 7-segment display indicates
Auto 1 Auto 2 Auto 3
After the indication,
U. 1. - - - (U. 1. flash)
When the flashing stops and
U. 1. - - - (U. 1. light)
complete.
7
Repeat steps 4 to 6 for other refrigerant lines.
8
After completing the address setting of all systems, turn off dip switch 2 of SW30 on the interface P.C.
boards of all the outdoor units connected to the same central control, except the unit that has the lowest
address.
(For unifying the termination of the wiring for the central control of indoor and outdoor units)
EN-39
U1
U2
U3
U4
CN10
Communication
terminal board
U1
U2
U3
U4
TO INDOOR
TO CENTRAL
UNIT
CONTROLLER
.
.
starts flashing on the display.
remains lit on the display, the setting is
SW30
9
Connect the relay connectors "CN10" to "CN02", which are mounted on the interface P.C. boards of all
the outdoor units connected to the central control.
NOTE
Ensure that before you perform this task, address that the setting of the refrigerant line have all been completed.
[U1, U2] and [U3, U4] connected
CN02
CN10
10
Set the central control address.
(For the setting of the central control address, refer to the installation manuals of the central control devices.)
– 20 –
Header unit interface P.C. board
SW04
SW05
SW15
D600 D601 D602 D603 D604
SW06
SW07
SW09
SW10
SW01
SW02
SW03
SW11
SW12 SW13
SW14
SW16
SW17
SW30
U1
U2
U3
U4
Communication
terminal board
U1
U2
U3
U4
TO INDOOR
TO CENTRAL
UNIT
CONTROLLER
EN-40
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