Daikin E-Series Service Manual page 370

SiENBE18-621
Troubleshooting
Method of Replacing The Inverter's Power Transistors Modules
Power module checking
When using the digital type of multiple tester, make measurement in
diode check mode.
Tester terminal
+ -
C+ U
V
W
U C-
V
W
U C+
V
W
C- U
V
W
The following abnormalities are also doubted besides the PC board abnormality.
! Faulty compressor (ground fault, ground leakage)
! Faulty fan motor (ground leakage)
Criterion Remark
It may take time to
Not less than 0.3V
determine the
(including ?)*
voltagedue to
capacitor charge or
else.
Not less than 0.3V
(including ?)*
0.3 to 0.7V
(including ?)*
0.3 to 0.7V
(including ?)*
*There needs to be none of each value variation.
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