6
4. Electrical work
4.1. Indoor unit (Fig. 4-1)
1. Remove the holder and intake sensor.
2. Remove two electrical wiring service panels.
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.
• Install an earth longer and thicker than other cables.
(Earth cable dia: Thicker than 1.6 mm)
• Considering the case of suspending the electrical box during services, leave the
wiring some allowance. (Approx. 50 to 100 mm)
s
s
s
s
s
Selecting non-fuse breaker (NF) or earth leakage breaker (NV).
A means for the disconnection of the supply with an isolation switch, or similar de-
vice, in all active conductors shall be incorporated in the fixed wiring.
Power supply wiring
• Power supply codes of appliance shall not be lighter than design 245 IEC 53 or 227
IEC 53.
• A switch with at least 3 mm contact separation in each pole shall be provided by the
air conditioner installation.
Power cable size: more than 1.5 mm
2
.
A
Entry for control cable
F
Power supply terminals (with earth terminal)
B
Entry for power
G
Transmission terminals
C
Clamp
H
MA Remote controller terminal
D
Service panel for indoor controller
I
Secure with the clamp
switch setting
J
Intake sensor
E
Service panel for electrical wiring
K
Holder
Fig. 4-1
Fig. 4-2
1
2
A
A
C
TB5
TB15 TB5
TB15
S
M1 M2
S
M1 M2
B
TB3
M1 M2
2
1
C
2
1
A
A
C
TB5
TB5
S
M1 M2
S
M1 M2
C
B
TB3
M1 M2
4.2. Connecting remote controller, indoor and outdoor
transmission cables (Fig. 4-2)
• Connect indoor unit TB5 and outdoor unit TB3. (Non-polarized 2-wire)
The “S” on indoor unit TB5 is a shielding wire connection. For specifications about
the connecting cables, refer to the outdoor unit installation manual.
• Install a remote controller following the manual supplied with the remote controller.
• Connect the remote controller’s transmission cable within 10 m using a 0.75 mm
2
core cable. If the distance is more than 10 m, use a 1.25 mm
2
junction cable.
1
MA Remote controller
• Connect the “1” and “2” on indoor unit TB15 to a MA remote controller. (Non-polar-
ized 2-wire)
• DC 9 to 13 V between 1 and 2 (MA remote controller)
2
M-NET Remote controller
• Connect the “M1” and “M2” on indoor unit TB5 to a M-NET remote controller. (Non-
polarized 2-wire)
• DC 24 to 30 V between M1 and M2 (M-NET remote controller)
A
Terminal block for indoor transmission cable
B
Terminal block for outdoor transmission cable
C
Remote controller
Constraints on transmission cable (Fig. 4-3)
Longest wiring length (L
1
+L
2
+L
4
or L
1
+L
3
or L
2
+L
3
+L
4
): less than 200 m
Length between indoor unit and remote controller (
R
): within 10 m
G
Outdoor unit
H
Earth
I
BC controller
J
Indoor unit
K
M-NET Remote controller
L
Non-polarized 2-wire
Note:
*1 Put the transmission cable earth via the outdoor unit’s earth terminal
to
the ground.
*2 If the remote controller cable exceeds 10 m, use a 1.25 mm
2
diameter cable
over the exceeded portion, and add that exceeded portion to within 200 m.
*3 The BC controller is required only for simultaneous cooling and heating
series R2.
4.3. Setting addresses (Fig. 4-4)
(Be sure to operate with the main power turned OFF.)
• There are two types of rotary switch setting available: setting addresses 1 to 9 and
over 10, and setting branch numbers.
Note:
Please set the switch SW5 according to the power supply voltage.
• Set SW5 to 240 V side when the power supply is 230 and 240 volts.
• When the power supply is 220 volts, set SW5 to 220 V side.
A
Address board
Fig. 4-3
A
Fig. 4-4
G
I
J
J
J
K
K
K
K
J
J
L
K
H
*1
*3
L1
L2
L4
r
L3
*2
SW14
0
SW11
0
SW12
0
1 2 3 4 5 6 7 8 9 10
ON
OFF
SW1
SW5
220V
240V
SWC
CN82
CN43
3
2
SWA
1
2
3
SWB
4
A
E
D
J
,
K
B
C
G
F
I
H
