PCB Diagram and Parts List
5-4 Samsung Electronics
5-2-1 Main PCB
QAC018JXADCH
5-2 Outdoor Unit
No. Function
No. Function
1 MAIN POWER (N)
12
Sub display PCB connection
(DC5V,12V,com1,com2)
2 4Way Valve
13 SMPS PCB connection (DC15V)
3 FAN MOTOR connection
14 Download Main
4Indoor communication connection
15 SMPS PCB connection (DC5V,12V)
5N/A
16 Compressor connection (U,V,W)
6
EEV control17 Reactor
7Out/Discharge/Cond./OLP temp. sensor
18 SMPS PCB connection (AC220V)
8
DRED PBA connection
(
K
DRED : Demand Response Enabling
Device)
19
MAIN POWER (L)
9
Sub display PCB connection
(Key, 7-segment signal)
20 EARTH
10
Sub display PCB connection
(Key, solution communication signal)
21 Download INV
11 EEPROM connection
17
12
1
2
11
15
10
16
3 6
5
7
14
13
4
9
8
18
19
20
21
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