– 89 –
2 Be sure to disconnect the relay connectors between the [U1U2] and [U3U4] terminals on all
the header outdoor units that will be connected to the central control. (Factory default:
disconnected)
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 header outdoor unit indicates U. 1. L08 (U. 1. flash) .
5 Push 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 Auto 1
→→
→→
→ Auto 2
→→
→→
→ Auto 3 .
After the indication, U. 1. - - - (U. 1. flash) starts flashing on the display.
When the flashing stops and U. 1. - - - (U. 1. light) , 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 header 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)
9 Connect the relay connectors between the [U1, U2] and [U3, U4] terminals of the header
outdoor unit of each refrigerant line.
U1 U2 U3 U4 U5 U6
2
TO
INDOOR
UNIT
TO
CENTRAL
CONTROL
LER
TO
OUTDOOR
UNIT
U1 U2 U3 U4 U5 U6
9
TO
INDOOR
UNIT
TO
CENTRAL
CONTROL
LER
TO
OUTDOOR
UNIT
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