Daikin RXM20R Service Manual page 60

4 | Components
Service manual
60
3 Disconnect the Faston connectors from the compressor wire terminals U, V
and W.
INFORMATION
Note the position of the Faston connectors on the compressor wire terminals to
allow correct connection during installation.
U Wire terminal U
V Wire terminal V
W Wire terminal W
CAUTION
Before measuring the compressor motor windings resistance, measure the
resistance of the multimeter probes by holding the probes against each other. If the
measured resistance is NOT 0 Ώ, this value MUST be subtracted from the measured
winding resistance.
4 Measure the resistance between the compressor motor windings U-V, V-W
and U-W.
Result: All measurements MUST be approximately the same.
Unit
Class 20~35
Class 42~60
Class 71
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
V U
W
Compressor
M1C
M1C
M1C
Action
Continue with the next step.
Replace the compressor, see
"4.2.2 Repair
RXM20~71R(9) + ARXM25~71R(9) + FTXM20~71R + ATXM25~50R +
Winding resistance value
(at temperature of 20°C)
1.89 Ω ± 5%
1.114 Ω ± 5%
0.274 Ω ± 5%
4
procedures" [ 63].
4
"7.2 Wiring diagram" [
FVXM25~50A
Split New Perfera R32
ESIE20-11B – 2022.02
226].