Daikin FTXP20-71L Service Manual page 56

3 | Components
Service manual
56
Compressor motor winding
measurements are correct?
Yes
No
5 Measure the continuity of the U, V and W wires between the compressor and
the PCB. If no continuity, correct as needed, see
6 Connect the Faston connectors to the compressor wire terminals U, V and W
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.
Action
Continue with the next step.
Replace the compressor, see
"3.2.2 Repair procedures" [
"6.2 Wiring
V U
W
Action
Continue with the next step.
Perform a check of the appropriate PCB,
see "3 Components" [
ATXP20~35 + FTXP20~71 + ARXP20~35 + RXP20~71
4
58].
4
diagram" [ 159].
4
46].
Split Comfora R32
ESIE18-01E – 2023.01