Daikin Emura RXJ20A5V1B Service Manual page 66

4 | Components
Service manual
66
U Wire terminal U
V Wire terminal V
W Wire terminal W
7 Install the compressor wire terminals cover.
8 Install the compressor insulation.
9 Turn ON the power using the respective circuit breaker.
10 Start the unit operation via the user interface.
CAUTION
NEVER operate the compressor with the compressor wire terminals cover removed.
11 Wait for – or create condition to operate the compressor.
12 Once the compressor operates, measure the U-V-W inverter voltages.
ALWAYS measure at the PCB side.
Result: All measurements MUST be the same.
Inverter voltage measurements are
correct?
Yes
No
13 While compressor is operating, measure the current in each phase U, V and
W. ALWAYS measure at the PCB side.
Result: All measurements MUST be the same.
Compressor motor winding current
measurements are correct?
Yes
No
V U
W
Action
Continue with the next step.
Perform a check of the appropriate PCB,
see "4 Components" [
Action
Perform an insulation check of the
compressor, see
4
procedures" [
Preventively replace the compressor,
see "4.2.2 Repair
4
53].
"4.2.1 Checking
62].
4
procedures" [ 68].
RXJ20~50A + FTXJ-A(W)(S)(B)
Split Emura 3 R32
ESIE22-04B – 2022.08