20
English
WARNING
G
Be sure to comply with local codes on running
the wire from the indoor unit to the outdoor unit
(size of wire and wiring method, etc.).
G
Each wire must be firmly connected.
G
No wire should be allowed to touch refrigerant
tubing, the compressor, or any moving part.
G
Be sure to connect power wires correctly
matching up numbers on terminals of the
outdoor unit and respective indoor units A – D.
CAUTION
G
Be sure to connect the power supply line to the
outdoor unit as shown in the wiring diagram.
The indoor unit draws its power from the
outdoor unit.
G
Do not run wiring for antenna, signal, or power
lines of television, radio, stereo, telephone,
security system, or intercom any closer than
1 meter from the power cable and wires between
the indoor and outdoor units. Electrical noise
may affect the operation.
G
To avoid the risk of electric shock, each air
conditioner unit must be grounded.
G
For the installation of a grounding device,
please observe local electrical codes.
G
Grounding is necessary, especially for units
using inverter circuits, in order to release
charged electricity and electrical noise
caused by high tension.
Otherwise, electrical shock may occur.
G
Place a dedicated ground more than 2 meters
away from other grounds and do not have it
shared with other electric appliances.
WARNING
Fig. 25b
4 indoor units with
GRF248MR5IAA-318MR5IAA
INDOOR UNIT
4
3
2
1
3
2
1
2
1
UNIT A
T
e
rm
inal
L
N
A
B
C
Terminal (9P)
Terminal
(2P)
OUTDOOR UNIT
Grounding line
INDOOR UNIT
4
3
2
1
6
5
4
UNIT B
T
e
rm
inal
Grounding line
INDOOR UNIT
4
3
2
1
9
8
7
UNIT C
T
e
rm
inal
Grounding line
Grounding line
P
o
w
er supply
Single-phase 220-240V
A
C
50Hz
220V
A
C
60Hz
(A)
(B)
(B)
(C)
(B)
(B)
(C)
(B)
(B)
(C)
9
8
7
6
5
4
3
2
1
1
2
L
N
Terminal (12P)
Terminal
(2P)
OUTDOOR UNIT
Grounding line
Grounding line
Grounding line
Grounding
line
INDOOR UNIT
4
3
2
1
UNIT A
UNIT B
UNIT C
UNIT D
12
11
10
Te
rm
in
a
l
A
INDOOR UNIT
4
3
2
1
Te
rm
in
a
l
B
INDOOR UNIT
4
3
2
1
Te
rm
in
a
l
C
INDOOR UNIT
4
3
2
1
Te
rm
in
a
l
D
Grounding line
P
o
w
er supply
Single-phase 220-240V
A
C
50Hz
220V
A
C
60Hz
(A)
(B)
(B)
(C)
(B)
(B)
(C)
(B)
(B)
(C)
(B)
(B)
(C)
3 indoor units with
GRF248MR5IAB
5-3. Wiring System Diagram
T
e
rm
inal
INDOOR UNIT
4
3
2
1
3
2
1
6
5
8
7
4
4
3
2
1
UNIT B
T
e
rm
inal
INDOOR UNIT
UNIT A
A
(A)
(B)
(B)
(C)
B
Terminal (8P)
OUTDOOR UNIT
Grounding line
Grounding line
Grounding line
Single-phase 220-240VAC 50Hz
220VAC 60Hz
Power supply
(B)
(B)
(C)
Fig. 25c
2 indoor units with
GRF198MR5IAA
Fig. 25a
Summary of Contents for GRF148MR5I
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