8
en
6.1. Electric wiring (Fig. 6-1)
1. Remove the tapping screws
a
and then remove the electrical equipment cover
b
.
2. Connect the electric wires securely to the corresponding terminals.
3. Fasten the wires
d
with the bands
c
.
• Always ground the wiring (the ground wire diameter must be 1.6 mm or more).
• If the wires contact the pipes, condensation may drip onto them. Make sure that
the wires are properly routed.
• Fasten the power source wiring to the control box using the buffer bushing for tensile
force (PG connection or the like)
• After finishing this work, always reassemble the unit.
• For instructions on how to reinstall the air intake grill, see page 7.
Warning:
Never splice the power cable or the indoor-outdoor connection cable, otherwise
it may result in a smoke, a fire or communication failure.
Wiring circuit breaker and isolating switch (B) must be always ON
except when being cleaned or checked. (When R32 is used)
Hang the attached label
8
or attach the sticker, and explain it to
customers.
When the wiring circuit breaker or isolating switch (B) is OFF, the
refrigerant sensor will not detect refrigerant leakage because elec-
tricity is not supplied.
Note: If the power supplies of indoor unit and outdoor unit are sepa-
rated, hang the attached label
8
on the wiring circuit breaker
or isolating switch, or attach the sticker, and explain it to cus-
tomers.
Caution:
Be careful about the fan rotation when the breaker is ON.
When the refrigerant sensor detects the refrigerant leakage, the fan starts
rotating automatically.
This may cause injury.
6. Electrical work
e
d
c
b
a
f
Fig. 6-1
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
4
×
10 tapping screws
d
Terminal block for indoor and outdoor units connector.
b
Electrical equipment cover
e
Grounding cable connector
c
Wiring bands
f
Bushing (for the wire hole)
A
C
B
* Affix a label A that is included with the manuals near each wiring diagram for the indoor and outdoor units.
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 cords
F
Controller
G
Indoor unit
* Affix a label A that is included with the manuals near each wiring diagram for the indoor and outdoor units.
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 cords
F
Controller
G
Indoor unit
H
Indoor unit earth
1:1 System
Simultaneous twin/triple/quadruple system
WARNING
H
H
H
F
A
C
B
RG79F531H01_01en.indd 8
2021/04/28 15:24:33
009
