3 Electrical and control settings
Unit electrical wiring and connection
SMGB0137 rev.0 - 05/2021
50
3 Use the shielded twist pair cable for control between the outdoor unit and the indoor units. They are connected to the
terminals 1 and 2 of the terminal boards. The remote control switch cable is connected to the terminals A and B of
each indoor unit terminal board.
?
N O T E
• When the total wiring length for control cable between the outdoor unit and the indoor unit and between indoor units is less than 100m,
the normal wiring (more than 0.75mm
2
) except the twist pair cable is available.
• The total wiring length for the remote control switch can be extended up to 500m. If the total wiring length less than 30m, the normal
wiring (0.3mm
2
) except the twist pair cable is available.
!
D A N G E R
• Tightly secure wirings to the terminal board according to the specified torque. If tightening the terminals is not completed,
heat generation, an electric shock or a fire will occur at the terminal connection.
• Make sure that the wires are securely fixed in order not to apply an external force to the terminal connections of the wirings.
If fixing is not completed, heat generation or a fire will occur.
• Fix the terminals that do not touch to the electrical box surface. If the terminals are closed to the surface, it may cause
activation of ELB, heat generation at terminal connection, a fire or an electric shock.
!
C A U T I O N
• Separate the power supply wiring from the terminal block for controller and communication cables (TB2).
• Do not connect the main power source cables to the control line (Terminals A, B, 1 and 2 of TB2). If connected, the printed circuit
board (PCB) will be broken.
•
Pay attention to followings when wires are connected to terminal board.
(A) Attach an insulation tape or a sleeve to each terminal.
(B) Maintain the distance between the electrical box and the terminals to prevent a short circuit.
(C) Maintain the distance between the terminals.
(A)
(B)
(C)
Screw
?
N O T E
In case of using a wired remote control switch (PC-ARFP1E) or optional receiver Kit (PC-ALHZ1), the following setting is required:
• The setting before shipment is “Wireless”. Set the SW2 to “Wired”. If not, the operation is not available.
• Connect the remote control switch cables to the terminals A and B at the terminal board TB2.
SW2
DIP switch PCB
Wired
Wireless
Change to "Wired"
In case of using a wireless remote control switch (PC-AWR):
• The SW2 switch setting is NOT required when the wireless remote control switch (PC-AWR) is used with the receiver built in the
indoor unit. However, the simultaneous indoor units operation is not available when this wireless remote control switch is used with
the receiver built in the indoor unit. If the simultaneous indoor units operation is required with this wireless remote control switch, use
the optional receiver kit (PC-ALHZ1).
• For the identifying of indoor units installed side by side operation, the wireless remote control switch should be set at “b,c or d mode”.
(Refer to Installation and Operation Manual for the wireless remote control switch about “mode” setting).
