Mitsubishi Heavy Industries SRK25GZ-L1 Handbook page 904

FDC-HKX
1) Using the address switch (green) on the outdoor unit PCB, set the address of the outdoor unit in a range of 00 - 47 avoiding
duplication with any other outdoor unit.
2) Using the address switch (green) on the indoor unit PCB, set the outdoor No. at the same No. as the outdoor unit which is
connected with a refrigerant pipe.
3) Using the address switch (blue), set the indoor No. of indoor unit in a range of 00 - 47 avoiding duplication with any other
unit on the connection.
(7) Change of control
Details of control for outdoor units are selectable with the methods as listed below.
Selecting method of control
PCB (SW-3) No. 2 ON
PCB (SW-3) No. 3 ON
PCB (SW-3) No. 4 ON
PCB (SW-3) No. 5 ON
PCB (SW-3) No. 6 ON
PCB (SW-3) No. 7 ON
PCB (J1) OFF
PCB (J5) OFF
PCB (J6) OFF
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Detail of selected control
Backup operation with inverter compressor only
Cancel of compressor dilution protection control
Mismatch check of indoor-outdoor connection
(Only when No. 5 and No. 6 of SW-3 are ON.)
Test run from outdoor unit
Cooling or heating selection at test run from outdoor unit
Forced cooling/heating mode
(Allows to fixe at cooling or heating by a signal from CnG.)
Selection of external input (CnS1)
Pulse input with the level input at-shipment-from-factory off
Defrosting off (makes easier to start defrosting)
Countermeasure for snow
(Turns the outdoor fan ON for 10 sec. at every 10-min. at outdoor
temperature 3˚C or under.)