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6. Electrical work
6.1.1. Indoor unit power supplied from outdoor unit
The following connection patterns are available.
The outdoor unit power supply patterns vary on models.
A
B
C
* Affix label A that is included with the manuals near each wiring diagram for the indoor and outdoor units.
D
L
A
B
C
N
S1
S2
S3
* Affix label A that is included with the manuals near each wiring diagram for the indoor and outdoor units.
Indoor unit model
Indoor unit-Outdoor unit
Indoor unit-Outdoor unit earth
Indoor unit earth
Remote controller-Indoor unit
Indoor unit (Heater) L-N
Indoor unit-Outdoor unit S1-S2
Indoor unit-Outdoor unit S2-S3
Remote controller-Indoor unit
*1. <For 35-140 outdoor unit application>
Max. 45 m
2
If 2.5 mm
used, Max. 50 m
2
If 2.5 mm
used and S3 separated, Max. 80 m
<For 200/250 outdoor unit application>
Max. 18 m
2
If 2.5 mm
used, Max. 30 m
2
If 4 mm
used and S3 separated, Max. 50 m
2
If 6 mm
used and S3 separated, Max. 80 m
*2. The 10 m wire is attached in the remote controller accessory. Max. 500 m
*3. The figures are NOT always against the ground.
S3 terminal has DC 24 V against S2 terminal. However between S3 and S1, these terminals are not electrically insulated by the transformer or other device.
Notes: 1. Wiring size must comply with the applicable local and national code.
. Power supply cords and indoor unit/outdoor unit connecting cords shall not be lighter than polychloroprene sheathed flexible cord. (Design 60245 IEC 57)
3. Install an earth longer than other cables.
Warning:
Never splice the power cable or the indoor-outdoor connection cable, otherwise it may result in a smoke, a fire or communication failure.
Fig. 6-1
1 System
D
G
L
N
S1
S1
S2
S2
S3
S3
E
1
F
2
Simultaneous twin/triple/quadruple system
G
G
G
S1
S1
S1
S2
S2
S2
S3
S3
S3
E
1
1
1
F
2
2
2
H
*1
*1
*2
*3
*3
*3
*3
6.1. Indoor unit (Fig. 6-1)
1. Remove the electrical wiring service panel.
2. Remove the electrical box cover.
3. Wire the power cable and control cable separately through the respective wiring
entries given in the diagram.
• Do not allow slackening of the terminal screws.
• Leave excess cable so that the electrical box cover can be suspended below the
unit during servicing. (Approx. 50 to 100 mm)
A
Entry for control cable
B
Entry for power
C
Clamp
D
Electrical box cover
E
Service panel for electrical wiring
F
Temporary hook for electrical box cover
G
Indoor / Outdoor unit connecting terminals
H
Remote controller connector
I
Secure with the clamp
J
Earth terminal
1:1 System
A Outdoor unit power supply
B Earth leakage breaker
C Wiring circuit breaker or isolating switch
D Outdoor unit
E Indoor unit/outdoor unit connecting cables
F Remote controller
G Indoor unit
G
A Outdoor unit power supply
B Earth leakage breaker
C Wiring circuit breaker or isolating switch
S1
D Outdoor unit
S2
E Indoor unit/outdoor unit connecting cables
S3
F Remote controller
G Indoor unit
1
2
H Indoor unit earth
H
H
PLA
3 × 1.5 (polar)
1 × Min. 1.5
1 × Min. 1.5
2 × 0.3 (Non-polar)
—
AC 230 V
DC24 V
DC12 V
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