Daikin R71FUV1 Service Manual page 476

Troubleshooting by Remote Controller
(6) Using an analog tester, measure resistance and fill in
the blanks in the following table.
In case of unbalanced resistance for one of the 3
phases in each table (when the resistance value is
equal to 5 times or more than the other resistance
values), the power transistor is broken.
In normal cases, each phase shows a similar
resistance value.
Tester
(+) (-)
C+ U
C+ V
C+ W
U C+
V C+
W C+
Resistance
Ω
∞
∞
∞
Outdoor Unit PCB
C+ C-
U V
Red White Blue
U V
Comp.
Tester
(+) (-)
C- U
C- V
C- W
U C-
V C-
W C-
W
W
Si20-701_B
Resistance
Ω
∞
∞
∞
469