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3 Install the 2 wiring fixtures with screws for wiring fixture
(accessory).
4 User interface cable: Route the cable through the large cut out
hole and connect it to the terminal block (symbols P1, P2).
5 Transmission cable: Route the cable through the large cut out
hole and connect it to the terminal block (make sure the
symbols F1, F2 match with the symbols on the outdoor unit).
Bundle the transmission cable with the user interface cable and
fix them with a tie wrap on the wiring fixture.
6 Power supply cable: Route the cable through the small cut out
hole and connect it to the terminal block (L, N, earth). Fix the
cable with a tie wrap on the wiring fixture.
a
Circuit breaker
b
Residual current device
k
7
30~35
a
b
c
d
a
Control box
b
Service cover screw
c
Printed circuit board
d
Service cover
e
Wiring diagram label
f
Power supply wiring
g
Small cut out hole
h
User interface cable and transmission cable
i
Rear piping cover
j
Large cut out hole
k
Connection of user interface cable and transmission
cable
l
Connection of power supply cable
m
Wiring fixture fixed with a screw (accessory)
n
Tie wrap (accessory)
7 Seal all gaps with sealing material (accessory) to prevent small
animals from entering the system.
8 Reattach the service cover.
Complete system examples
▪ 1 user interface controls 1 indoor unit.
▪ Group control or 2 user interfaces control 1 indoor unit
▪ With BS unit
1 user interface controls 1 indoor unit.
FXHQ-A
VRV system air conditioner
3P668115-3E – 2022.11
a
b
l
L
N
m
m
b
e
f
g
h
i
j
TO IN/D
TO OUT/D
N
L
N L
P
P
F
F
T
T
1
2
1
2
1
2
b
P
P
1
2
c
a
Outdoor unit
b
Indoor unit
c
User interface
d
Most downstream indoor unit
Group control or 2 user interfaces control 1 indoor unit
TO IN/D
TO OUT/D
h
n
N
L
n
f
n
N L
P
P
F
F
T
T
1
2
1
2
1
2
b
P
P
1
2
c
a
Outdoor unit
b
Indoor unit
c
User interface
d
Most downstream indoor unit
With BS unit
c
a
Outdoor unit
b
BS unit
c
Indoor unit
d
User interface
14 Electrical installation
a
N
L
N
L
N L
N L
P
P
F
F
T
T
P
P
F
F
T
T
1
2
1
2
1
2
1
2
1
2
1
2
P
P
P
P
1
2
1
2
a
N L
N L
P
P
F
F
T
T
P
P
F
F
T
T
1
2
1
2
1
2
1
2
1
2
1
2
F
F
F
F
1
2
1
2
a
TO IN/D
TO OUT/D
F
F
F
F
1
2
1
2
b
OUTDOOR UNIT
INDOOR UNIT
N
L
N L
P
P
F
F
T
T
1
2
1
2
1
2
d
P
P
1
2
Installation and operation manual
N
L
d
N L
P
P
F
F
T
T
1
2
1
2
1
2
P
P
1
2
d
N L
P
P
F
F
T
T
1
2
1
2
1
2
P
P
P
P
1
2
1
2
19
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