En-14
1: Function setting
First 2 digits Last 2 digits
(the display when the main power is
turned on)
(When [F4] to [F9] are displayed, continue
to press the “SELECT” button until [F3] is
displayed.)
Automatic address setting for
signal ampli
fi
ers
Press the “SELECT” button until “10” is
displayed.
Press the “ENTER” button for more than 3
seconds.
Setting is complete when the number of units
is displayed
End
7.6. Indoor unit address setting
7.6.1 Indoor unit address setting
Address must be set for the indoor unit.
Manual setting
→
• When setting with the switch inside the indoor unit, refer to
the indoor unit operating manual.
• When setting with a remote control, refer to the remote
control operating manual.
Automatic setting
→
• Check that the wiring is as shown in the
fi
gure below.
Operate using the outdoor master unit of each refrigerant
system.
Fig. Wiring example for automatic address setting
(1) Signal ampli
fi
er wiring example
(2)(3)(4) Indoor unit wiring example
(Connect the indoor and outdoor units of the same refrigerant system as shown
below.)
Refrigerant system1
Refrigerant system2
Refrigerant system3
Master unit
Master unit
Master unit
Signal ampli
fi
er
Signal ampli
fi
er
NOTE:
• The automatic address function can be used for a maximum of 9 indoor units installed to
the same refrigerant system. When network is connected to other refrigerant systems,
the automatic address function cannot be used.
• The addresses of indoor units that have been con
fi
gured automatically cannot be as-
signed in the order when they are installed. (Refer to the indoor unit installation manual
for the procedures to check the addresses.)
7.6.2 Procedures to enable automatic address setting on indoor
units
Check that the rotary switch IU AD on the indoor unit PC board is set to “00”.If it is not set
to “00”, it means the address of that device is not set. (Factory default is “00”).
Turn on the power of the indoor and outdoor units.
• When the system is normal, nothing will be displayed on the 7 segment display.
• When ERROR is displayed, inspect the units.
Use the “MODE/EXIT”, “SELECT”, and “ENTER” buttons on the outdoor unit PC board to
con
fi
gure settings according to the procedures below.
1: Function setting
(The display when the main
power is turned on)
(When [F4] to [F9] are displayed, continue to press
the “SELECT” button until [F3] is displayed.)
Press the SELECT button until
“11” is displayed.
Press the “ENTER” button for
more than 3 seconds.
End
The number of indoor units with normal settings
will be displayed at the
fi
rst 2 digits of the 7 seg-
ment LED display. The number of indoor units with
error will be displayed at the last 2 digits.
NOTE:
After the “ENTER” button is pressed, the end
processing will occur for about 30 seconds. During
this period, the 7 segment will blink.
Automatic address setting for indoor units
First 2 digits Last 2 digits
7.7. Resistance measurement of transmission cable
(Measure with breaker OFF)
CAUTION
Do not turn on the power if the resistance
between the terminals of the transmission
cable is abnormal. Otherwise, the PC
board may be damaged.
Measure the resistance between 2 terminals
of a transmission cable.
(1) Transmission cable connecting in-
door units, outdoor units, and signal
ampli
fi
ers
Measure the resistance of the signal
ampli
fi
er terminal and the terminal of
the indoor and outdoor units connected
farthest away from the device where
terminal resistor is measured.
A value from the table is displayed,
depending on the distance from the
signal ampli
fi
er and the device where
the terminal resistor is set.
This value is an estimate.
(2) Transmission cable connecting
outdoor units in a refrigerant system
The resistance between the terminals
of the transmission cable is 45-60
Ω
.
This value is an estimate.
Distance from termination resis-
tor (m)
0
~100
~ 200 ~ 300 ~400 ~500
Approximate resistance (
Ω
)
0 ~
50
A short circuit somewhere or 2
or more termination resistors are
connected
50
60
70
80
90
100
110
120
130
140
150
160
170
180
190
~
Faulty contact or wiring
length over 500 m
1K
~
∞
Faulty contact, open circuit, or no
termination resistor
9380545170_IM.indb 14
9380545170_IM.indb 14
5/19/2016 2:23:17 PM
5/19/2016 2:23:17 PM
