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7-4. Auto Address Setting
Example: Basic Wiring Diagram (1)
• Case of no link wiring
(Inter-unit control wiring is not connected to a multiple system.)
Indoor unit address setting is possible without starting the compressor.
Unit 1 setting (outdoor main unit)
System address
(System 1 setting)
(SW2) (SW1)
ON
1
Outdoor Unit
Remote controller
Case 1
Auto Address Control from Outdoor Unit
1. Check the refrigerant system's Address Setting Rotary switch (SW2) on outdoor main unit control P.C. board to "1" and the Dip switch
(SW1) to "0" (at shipment).
2. Regarding the setting of the number of indoor units connected to the outdoor unit, set the Dip switch (SW3) for setting the number of
indoor units on outdoor main unit control P.C. board connected to the outdoor unit to "1".
If the Rotary switch (SW4) set to "0", 10 units can be prepared for operation.
3. Turn on power to indoor and outdoor units.
4. Short circuit the A.ADD pin on outdoor main unit control P.C. board for over 1 second long and open circuit.
Communication for auto address setting begins.
* To cancel, short circuit the A.ADD pin again for over 1 second long and then open circuit. The LED that indicates auto
address setting goes out and the process is stopped.
Be sure to perform auto address setting again.
Auto address setting is completed when LEDs 1 and 2 on outdoor main unit control P.C. board go out.
5. Remote control operation is now available.
* When auto address setting is controlled by the remote controller, perform auto address setting by the remote controller after step 3
described above.
Number of indoor units
(10 units setting)
(SW4) (SW3)
ON
ON
ON
OFF
OFF
2
1
2
Set the terminating
resistance pin to
SHORT side.
Unit 1
(CN-TERMINAL)
(Main)
Inter-unit control wiring
Indoor unit
1-1
ON
ON
1
2
OFF
* It is not necessary to control the terminating
resistance pin (3P) (CN-TERMINAL) on the
outdoor unit P.C. board.
3P pin is plugged in SHORT side at shipment.
Confi rm it is plugged in SHORT side.
1-2
1-3
Remote control
communication wiring
48
SHORT
1-10
ON
ON
1
2
OFF
3P terminating
resistance pin
(SHORT side)
OPEN
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