Gree GWH18TC-S3DNA1D Service Manual page 74

Service Manual
Test No.
test 1
test 2
test 3
test 4
test 5 H position, both ends of diode D34
I position, both ends of capacitor
test 6
J position, both ends of capacitor
test 7
K position, both ends of capacitor
test 8
L position, both ends of capacitor
test 9
test 10
test 11
test 12
test 13
test 14
Installation and Maintenance
Test point
Between A and C
Between B and C
Between D and E
Between F and G
C20
C67
C24
C73
From M position to ground
N, optical coupler U7
P, optical coupler U8
From Q point to ground
Between S and T
Corresponding component
Neutral wire and live wire
Neutral wire and live wire
DC busbar electrolytic capacitor
Electrolytic capacitor of power C8
IPM bootstrap circuit diode D34
Capacitor C20 of power 12V
Capacitor C67 of power 15V
Capacitor C24 of power 5V
3.3V Capacitor C73
From one end of R61 (M position) to
ground (signal receiving end of outdoor
unit)
U7(3, 4 leading feet)
U8(1, 2 leading feet)
From one end of R77 (Q position) to
ground (signal sending terminal of
outdoor unit)
Capacitor C113 of communication circuit
Test value under normal
condition
AC 160V~265V
AC 160V~265V
DC 180V~380V
DC 180V~380V
DC 13.5V~16.5V
DC 12V
DC 15V
DC5V
DC 3.3V
0~3.3V
0~3.3V
0~3.3V
0~3.3V
56V
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