Fujitsu AJH072LELAH Installation Manual Download

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En-14

7.5. Address setting for signal ampli

ers

7.5.1 Address setting for signal ampli

ers

When using signal amplifiers, the address for signal amplifiers must be set.
The address for signal amplifiers can be set automatically from 1 outdoor unit (master
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 ampli

ers

When setting the address of the signal amplifier, please use the factory setting. (See 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.

1: Function setting

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.)

Automatic address setting for
signal amplifiers

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 figure below.

Operate using the outdoor master 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

Refrigerant system 2

Refrigerant system 3

Master unit

Signal amplifier

NOTES:

• 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 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.)

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.

1: Function setting

(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.

End

The number of indoor units with normal settings will be
displayed at the first 2 digits of the 7 segment 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 termi-
nals of a transmission cable.

(1) Transmission cable connecting

indoor units, outdoor units, and
signal amplifiers

Measure the resistance of the signal
amplifier terminal and the terminal of
the indoor and outdoor units con-
nected farthest away from the device
where terminal resistor is measured.
A value from the table is displayed,
depending on the distance from the
signal amplifier and the device where
the terminal resistor is set.
This value is an estimate.

(2) Transmission cable connecting out-

door units in a refrigerant system

The resistance between the terminals
of the transmission cable is 45-60

This value is an estimate.

Distance from termination resistor
(m)

0~100

~200

~300

~400

~500

Approximate resistance (

)