Address Setting For Signal Amplifiers; Indoor Unit Address Setting; Resistance Measurement Of Transmission Cable; (Measure With Breaker Off) - Fujitsu AJY090LELDHS Installation Manual

7.5. Address setting for signal amplifiers

7.5.1 Address setting for signal amplifiers
When using signal amplifiers, the address for signal amplifiers must be set.
The address for signal amplifiers can be set automatically from the outdoor unit on the
network.
Refer to "Fig. Wiring example for automatic address setting" (7.6.1 chapter) for the wiring
example.
(For manual setting of address, refer to the signal amplifier installation manual.)
7.5.2 Automatic address setting for signal amplifiers
When setting the address of the signal amplifier, use the factory setting. (Refer to the
installation manual of the signal amplifier)
• 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
configure settings according to the procedures below.
First 2 digits Last 2 digits
(the display when the main power is turned on)
Set to Function mode [F3].
(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
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 operation manual.
• When setting with a remote control, refer to the remote
control operation manual.
Automatic setting → • Check that the wiring is as shown in the figure below. Oper-
ate using the outdoor unit of each refrigerant system.
Wiring example for automatic address setting
(1): Signal amplifier wiring example
(2)(3)(4): Indoor unit wiring example
(Connect the indoor and outdoor units of the same refrigerant system as shown below.)
Refrigerant system 1
Outdoor unit
Refrigerant system 2
Outdoor unit
Signal amplifier
Refrigerant system 3
Outdoor unit
NOTES:
• When network is connected to other refrigerant systems, the automatic address function
cannot be used.
• The addresses of indoor units that have been configured 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.)
1: Function setting
Automatic address setting for
signal amplifiers
Signal amplifier
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
configure settings according to the procedures below.
First 2 digits Last 2 digits
(The display when the main power is turned on)
Set to Function mode [F3].
(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.
The number of indoor units with normal settings will be
displayed at the first 2 digits of the 7-segment 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 display 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 termi-
nals of a transmission cable.
Transmission cable connecting indoor
units, outdoor units, and signal ampli-
fiers
Measure the resistance of the signal ampli-
fier 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, depend-
ing on the distance from the signal amplifier
and the device where the terminal resistor
is set.
This value is an estimate.
1: Function setting
Automatic address setting for
indoor units
Distance from termination resistor
(m)
0~100 ~200 ~300 ~400 ~500
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 cable length over
~ 500 m
1K Faulty contact, open circuit, or no
~∞ termination resistor
En-14