Gree GWH12UB-K3DNA4F Service Manual page 71

18K
1. Key detection point
Test9
Test5
Test NO Test point
Test 1 Between A and C
Test 2 Between B and C
Test 3 Between D and E
Test 4 Between F and G
Test 5 Two ends of diode D15
Two ends of electrolytic
Test 6
capacitor C715
Two ends of electrolytic
Test 7
capacitor C710
Two ends of electrolytic
Test 8
capacitor C226
Two ends of chip capacitor
Test 9
C912
Test 10 Between M to GND
Test 11 Between N to GND
Test 12 Between S and T
68
Test3
E
L
D
H
Test8
S
Test12
T
DC busbar electrolytic capacitor
Electrolytic capacitor of power
D15(IPM modular +15V power supply)
Point M of R75 to ground (signal sending port of ODU)
Point N of R123 to ground (signal receiving port of ODU)
Power supply of communication ring
Test4
J
K
I
Tset7 Test6
M
N
Corresponding component
Neutral and live wires
Neutral and live wires
C715(+12V power supply)
C710(+5V power supply)
C226(+3.3V power supply)
C912(+17V power supply)
Test2
C
B
A
F G
Test10
Test11
Test value under normal
condition
160V~265V
160V~265V
DC 180V~380V
DC 180V~380V
DC 14.5V~15.6V
DC 12V~13V
DC 5V
DC 3.3V
DC 15V~18V
Fluctuate between 0~3.3V
Fluctuate between 0~3.3V
DC 56V
Installation and Maintenance
Service Manual
Test1