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4. Service procedures
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Section
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SM830076
(6) P.C.B. Setting
● Setting of outdoor control P.C.B.
(A) Standard control (single outdoor unit)
In case of single outdoor unit installation, no indoor unit’s setting is necessary for twin,
triple or quartet types (2, 3 or 4 indoor units).
Leave R.C. address setting at “0” as factory shipment state.
In this case, auto. address operation is performed automatically for the first time when the
power is switched on. This operation 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 *wired remote
controller), before turning on the power supply, set the R.C. address with S2, S3 on the
outdoor control P.C.B..
R.C. address: Refrigerant circuit address 1 ~ 30.
Regarding the example of R.C. address for group control, please refer to R.C. Address
Setting Method.
(C) Central control (when using the *system controller)
In case of central control (when using the system controller,that is, when linking outdoor
units in a network),
(a) Before turning the power supply on, set the R.C. address with S2, S3 on the outdoor
control P.C.B..
(b) Remove the short plug (CN4, 2P Black) from all outdoor units except one outdoor
unit.
Regarding the example of R.C. address for central control and the position of CN4,
please refer to R.C. Address Setting Method.
* Temperature displaed on both controllers are not °F but °C.
● Setting of indoor control P.C.B.
No setting is 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.