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The outdoor and all indoor units are in parallel through 2 non-polar wires.
Three wiring methods between wired controller and indoor unit:
A. 1 to multi (group control): one wired controller controls 2~16 indoors, as shown in above figure, indoor 1~indoor
2: indoor 2 is wired control master unit, the others are wired control slave units. Wired controller and the master
indoor (directly connected to wired controller) is connected by 3 polar wires; the other indoors and the master
indoors are connected by 2 or 3 polar wires, AC indoors wired "B" "C" polar wires, DC indoors wired "A" "B" "C"
polar wires*.
B. 1 to 1 (one wired controller controls one indoor): as shown in above figure, indoor 3~ indoor 4, indoor and wired
controller are connected by 3 polar wires.
C. 2 to 1 (two wired controller controls one indoor): as shown in above figure, indoor 6. Either of wired controllers
can be set as master wired controller, and the other is slave wired controller. Master/slave wired controller, and
master/indoor are connected by 3 polar wires.
When indoor is controlled by remote controller, refer to the "wired control master unit/wired control slave unit/
remote control unit table".A, B, C on signal terminal block need not wires and not connect the wired controller.
Power wiring figure
outdoor
Single-phase
power source: 1PH, 220-240V~, 50/60Hz
indoor 1
(wall mounted unit)
power source: 1PH, 220-240V~, 50/60Hz
Indoor and outdoor use their individual power source. All indoors use one power source. Must install the leakage
breaker and the over current breaker, or electric shock will occur.
Outdoor power source and power cable
Item
Model
AU032FSEUA
AU052FPEUA
AU072FPEUA
■ Power cable must be fixed firmly.
■ To avide electrical shock, make sure to disconnect the power supply 1 minute or more before servicing the
electrical parts. Even after 1 minute,always measure the voltage at the terminals of main circuit capacitors or
electrical parts and before touching, make sure that those voltages are 50VDC or less.
■ To persons in charge of electrical wiring work: Do not oerate the unit until the refrigerant piping is complete.
(Running it before the piping is ready will break the compressor)
■ Each outdoor must be earthed well.
indoor 2
(wall mounted unit)
power source: 1PH, 220-240V~, 50/60Hz
Power cable
Power
section
breaker
source
2
(mm
)
4
1PH,
220-
10
240V~,
50/60Hz
10
43
indoor 3
(non wall mounted unit)
power source: 1PH, 220-240V~, 50/60Hz
Rated current of residual
Circuit
circuit breaker (A)
Ground fault interruptor (mA)
(A)
response time (S)
20
20A 30mA below 0.1S
40
40A 30mA below 0.1S
40
40A 30mA below 0.1S
Ground wire
Section
Screw
2
(mm
)
4
M5
10
M5
10
M5
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