87
Installation and Maintenance
Service Manual
●Outdoor unit:
Test1
Test2
Test3
Test4
Test5
E
G
I
H
F
D
B
A
C
L
Test9
Test6
K
J
Tset7
M
N
Test11
Test10
Test8
S
T
Test12
1.Key detection point
Test NO
Test point
Corresponding component
Test value under normal
condition
Test 1
Between A and C
Neutral and live wires
160V~265V
Test 2
Between B and C
Neutral and live wires
160V~265V
Test 3
Between D and E
DC busbar electrolytic capacitor
DC 180V~380V
Test 4
Between F and G
Electrolytic capacitor of power
DC 180V~380V
Test 5
Two ends of diode D15
D15(IPM m15V power supply)
DC 14.5V~15.6V
Test 6
Two ends of electrolytic
capacitor C715
C715(+12V power supply)
DC 12V~13V
Test 7
Two ends of electrolytic
capacitor C710
C710(+5V power supply)
DC 5V
Test 8
Two ends of electrolytic
capacitor C226
C226(+3.3V power supply)
DC 3.3V
Test 9
Two ends of chip capacitor
C912
C912(+17V power supply)
DC 15V~18V
Test 10
Between M to GND
Point M of R75 to ground (signal sending port of ODU)
Fluctuate between 0~3.3V
Test 11
Between N to GND
Point N of R123 to ground (signal receiving port of ODU)
Fluctuate between 0~3.3V
Test 12
Between S and T
Power supply of communication ring
DC 56V
