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Installation Manual
2
In all the outdoor units connected to the central control, please make sure that 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.
)
3
Turn on indoor units first, and then turn on 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
.
5
Press SW 15 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
.
After the indication,
starts flashing on the display.
When the flashing stops and
remains lit on the display, the setting is
complete.
7
Repeat steps
4
to
6
for other refrigerant lines.
8
After completing 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)
U1
U2
U3
U4
CN02
CN10
U1
U2
U3
U4
TO INDOOR
UNIT
TO CENTRAL
CONTROLLER
[U1, U2] and [U3, U4] not connected
Communication
terminal board
U. 1. L08 (U. 1. flash)
Auto 1
Æ
Auto 2
Æ
Auto 3
U. 1. - - - (U. 1. flash)
U. 1. - - - (U. 1. light)
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
Please make sure that before you perform this task, address setting of the refrigerant line all have been completed.
10
Set the central control address.
(For the setting of the central control address, refer to the installation manuals of the central control devices.)
Header unit interface P.C. board
SW09
SW07
SW11
SW06
SW10
SW12 SW13
SW16
SW14
SW17
D600 D601 D602 D603 D604
SW04
SW05
SW15
SW01
SW02
SW03
SW30
SW30
U1
U2
U3
U4
CN02
CN10
U1
U2
U3
U4
TO INDOOR
UNIT
TO CENTRAL
CONTROLLER
[U1, U2] and [U3, U4] connected
Communication
terminal board
EN-57
EN-58
