Indoor Unit Address Setting; Resistance Measurement Of Transmission Cable (Measure With Breaker Off) - Fujitsu AirStage AJY040LELAH Installation Manual

1: Function setting
First 2 digits Last 2 digits
Automatic address setting for
signal amplifi ers
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 amplifi 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
Master unit
Refrigerant system2
Master unit
Signal amplifi er
Refrigerant system3
Master unit
NOTE:
• When network is connected to other refrigerant systems, the automatic address function
cannot be used.
• The addresses of indoor units that have been confi 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.)
(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 "10" is
displayed.
Press the "ENTER" button for more than 3
seconds.
Setting is complete when the number of units
is displayed
Signal amplifi er
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
confi gure settings according to the procedures below.
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 indoor units
Press the SELECT button until
"11" is displayed.
Press the "ENTER" button for
more than 3 seconds.
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.
End
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
amplifi ers
Measure the resistance of the signal
amplifi 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 amplifi 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 ~ 200 ~ 300 ~400 ~500
~100
A short circuit somewhere or 2
0 ~
or more termination resistors are
50
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
En-14