Set the Outdoor Unit No. switch to the outdoor unit No. of the associated outdoor unit within the range of 00 - 31 [in the case of previous SL: 00 - 47].

Set a unique number by avoiding the numbers assigned to other indoor units on the network.

③ Turn on power in order from the outdoor unit to indoor units. Give a one-minute or longer interval for them.

* When there are some units not supporting new SL connected in the network, set SW5-5 to ON to choose the previous SL communication mode.

In the case of previous SL, the maximum number of indoor units connectable in a network is 48.

Automatic address setting

Generally applicable to new SL/previous SL, use ﬁgures in [ ] with previous SL.

With new SL, you can set indoor unit addresses automatically even for an installation involving multiple refrigerant systems connected with same network, in addition to the conventional

automatic address setting of a single refrigerant system installation.

However, an installation must satisfy some additional requirements such as for wiring methods, so please read this manual carefully before you carry out automatic address setting.

(1) In the case of a single refrigerant system installation (Generally applicable to new SL/previous SL, use ﬁgures in [ ] with previous SL.)

① Outdoor unit address setting

Set as follows before you turn on power.

Make sure that the Outdoor Unit No. switch is set to 49 (factory setting)

② Indoor unit address setting

Set as follows before you turn on power.

Make sure that the Indoor Unit No. switch is set to 000 [in the case of previous SL: 49] (factory setting)

Make sure that the Outdoor Unit No. switch is set to 49 (factory setting)

③ Turn on power in order from the outdoor unit to indoor units. Give a one-minute or longer interval for them. Unlike the procedure set out in (2) below, you need not change settings from

the 7-segment display panel.

④ Make sure that the number of indoor units indicated on the 7-segment display panel agrees with the number of the indoor units that are actually connected to the refrigerant system.

(2) In the case of a multiple refrigerant systems installation (Applicable to new SL only. In the case of previous SL, set addresses with some other method.)

(This option is available when the interconnection wiring among refrigerant systems is on the outdoor side and new SL is chosen as the communication protocol.)

Address setting procedure

(perform these steps for each outdoor unit)

[STEP1]

(Items set before turning on power)

① Outdoor unit address setting

Set as follows before you turn on power.

Set the Outdoor Unit No. switch to a number 00 - 31. Set a unique number by avoiding the numbers assigned to other outdoor units on the network.

② Indoor unit address setting

Set as follows before you turn on power.

Make sure that the Indoor Unit No. switch is set to 000 (factory setting)

Make sure that the Outdoor Unit No. switch is set to 49 (factory setting)

③ Isolate the present refrigerant system from the network.

Disengage the network connectors (white 2P) of the outdoor units. (Turning on power without isolating each refrigerant system will result in erroneous address setting.)

[STEP2]

(Power on and automatic address setting)

④ Turn on power to the outdoor unit

Turn on power in order from the outdoor unit to indoor units. Give a one-minute or longer interval for them.

⑤ Select and enter "1" in P31 on the 7-segment display panel of each outdoor unit to input "Automatic address start."

⑥ Input a starting address and the number of connected indoor units.

Input a starting address in P32 on the 7-segment display panel of each outdoor unit.

⑦ When a starting address is entered, the display indication will switch back to the "Number of Connected Indoor Units Input" screen.

Input the number of connected indoor units from the 7-segment display panel of each outdoor unit. Please input the number of connected indoor units for each outdoor unit. (You can

input it from P33 on the 7-segment display panel.)When the number of connected indoor units is entered, the 7-segment display p anel indication will switch to "AUX" and start ﬂickering.

[STEP3]

(Automatic address setting completion check)

⑧ Indoor unit address determination

When the indoor unit addresses are all set, the 7-segment display panel indication will switch to "AUE" and start ﬂickering.

If an error is detected in this process, the display will show "A○○."

Check the 7-segment display panel of each outdoor unit.

Depending on the number of connected indoor units, it may take about 30 minutes before the indoor unit addresses are all set.

[STEP4]

(Network deﬁnition setting)

⑨ Network connection

When you have conﬁrmed an "AUE" indication on the display of each outdoor unit, engage the network connectors again.

⑩ Network polarity setting

After you have made sure that the network connectors are engaged, select and enter "1" in P34 on the 7-segment display panel of any outdoor unit (on only 1 unit) to specify

network polarity.

⑪ Network setting completion check

When the network is deﬁned, "End" will appear on the 7-segment display panel. An "End" indication will go off, when some operation is made from the 7-segment display panel or

3 minutes after.

②OFF

Indoor unit power source

①OFF

Outdoor unit power source

②indoor000/outdoor 49

Indoor unit

( factory setting )

(indoor/outdoor No.switch)

①01,02(Ex）

Outdoor unit (outdoor No.switch)

③Disconnect(each outdoor unit)