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107 PB
COMPONENTS TESTING
Figure 704
9‑12k Outdoor Unit Printed Circuit Board Identification
● Bottom view
● Top view
6
8
7
9
1011
15 14 13
1217
16
19 18
20
21
22
1 2 3 4 5
NO. Name NO. Name NO. Name
1 Compressor output port 9 Live wire 17 Terminal of outdoor fan
2 Master control chip 10 18
Connection wire between boards of
neutral wire connects AC-N4
Connect the negative pole of external
big electrolytic capacitor
3 Overload temperature of compressor 11
Connection wire between boards of
live wire connects AC-L2
19
Connect the positive pole of external
big electrolytic capacitor
4 Temperature of temperature sensor 12
Neutral wire terminal for electric
heating
20
5
Wire connection terminal between
boards of neutral wire connects AC-N3
EEPROM 13
Live wire terminal for chassis electric
heater
21
Connection wire between boards of
live wire connects AC-L3
6 Communication wire port 14
Live wire terminal for compressor
electric heater
22
Connect the middle position of
external big electrolytic capacitor
7 Earthing wire port 15 4-way valve wiring terminal /
8 Port of power neutral wire 16 Terminal of electronic expansion valve /
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