4. Service procedures
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IV - 48
SM830080
(7) P.C.B. Setting
● Setting of outdoor control PCB
(A) Standard control (single outdoor unit)
In case of single outdoor unit installation, even if in case of twin, triple or quartet type
(2, 3 or 4 indoor units), no setting necessary.
Keep factory shipment state (R.C. address is set in “0”).
In this case, auto. address operation takes place automatically for the first time when
the power is switched on. This takes about a few minutes.
(B) Group control (Multiple outdoor units)
In case of group control (up to 8 indoor units can be connected with one remote con-
troller), before turning the power supply on set the R.C. address with S2, S3 on the
outdoor control PCB.
R.C. address: Refrigerant circuit address 1 ~ 30.
Regarding the example of R.C. address for group control, please refer to page 53 and
sec. 12-3 (page 87).
(C) Central control (when using the system controller)
In case of central control (when using the system controller,that is, when linking out-
door units in a network),
(a) Before turning the power supply on, set the R.C. address with S2, S3 on the
outdoor control PCB.
(b) Remove the short plug (CN4, 2P Black) from all outdoor units except any one of
outdoor unit.
Regarding the example of R.C. address for central control and the position of CN4,
please refer to page 54 and sec. 12-3
(page 87).
● Setting of indoor control PCB
No setting necessary.
Each indoor unit address (UNIT No.: R.C. – No.) is decided after auto. address operation.
Indoor unit No.
Refrigerant Circuit No. (R.C. address)
Manual setting for indoor unit address can be performed also by remote controller.
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