Hitachi RCI-1.0FSN3 Service Manual page 158

4 Electrical wiring
2 Connect the control cables between the indoor unit and the outdoor unit correctly. Check to ensure that the terminal for
power source cable (Terminals "L1" to "L1" and "N" to "N" of each terminal board: AC220-240V) between the indoor unit
and the outdoor unit coincide correctly. If not, some component will be damaged.
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.
4 When installing the unit in Australia, connect the both ends of shielded twist pair cable (remote control switch cable and
control cable) to the earth as shown below.
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
for Australia)
• 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
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
• 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.
146
SMGB0077 rev.0 - 01/2013
Shielded twist pair cable
Earth
) except the twist pair cable is available. (except for Australia)
2
(B)
Wires
Shield
Earth
) except the twist pair cable is available. (except
2
(C)
Screw
(A)