Airwell YEVFD Série Manuel D'installation page 27

Installation and debugging
3. Outdoor unit PCB dipswitch setting, attention the different PCB version.
In the following table, 1 is ON, 0 is OFF.
BM1 introduction
BM1_1 Indoor searching after startup
BM1_2 Celsius/Fahrenheit area selection
BM1_3 External static pressure
BM1_4 Energy saving or refrigeration effect priority
BM1_5 Indoor simultaneous control
BM1_6 Defrosting condition selection
BM1_7 Defrosting level
BM1_8 Silent operation selection
BM2 introduction
BM2_1 Cold only or heat pump
BM2_2
BM2_3 Outdoor horse power selection
BM2_4
BM2_5 Power source selected
BM2_7
Running mode preference
BM2_8
Note: Either indoor unit unlocked or the locked quantity different with actual connecting number, it cannot run.
4. bridge instruction
CJ1:
Short it before power ON-- PCB check its function (used for factory production.
Short it after power ON-- time short function, 60 seconds become to 1 second.
CJ2: Reserved
0 Begin to search indoor
1 Stop searching indoor and lock the quantity
0 Celsius area
1 Fahrenheit area
0 High
1 Low
0 Energy saving priority
1 Refrigeration effect priority
0 No
1 Yes
0 Not easy to frost area
1 Easy to frost area
0 Ordinary
1 Strengthen
0 Forbidden(without silent operation)
1 Allow (with silent operation)
[1] Cold only or heat pump
0 Heat pump(default)
1 Cold only
[2] [3] [4]
1 0 0
1 0 1
1 1 0
[5] Power source selected
0 Single-phase
1 Three-phase
[7] [8] Running mode preference
0 0 Start first(default)
0 1 Later start first
1 0 Cooling first
1 1 Heating first
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Outdoor horse power selection
4HP
5HP
6HP