Daikin Perfera RXM R Series Service Manual page 141

To perform an electrical check of the DC fan motor assembly
RXM20~71R + ARXM25~71R + FTXM20~71R + ATXM25~50R +
FVXM25~50A
Split New Perfera R32
ESIE20-11 – 2021.01
1 Visually check:
▪ For any burnt‑out part or wire. If found, replace the fan motor, see
4
procedures" [ 142].
▪ That fan motor fixation bolts are correctly installed and fixed. Correct as
needed.
2 Manually rotate the fan motor shaft. Check that it rotates smoothly.
3 Check the friction of the DC fan motor shaft bearing.
Is the DC fan motor shaft friction
normal?
Yes
No
1 First perform a mechanical check of the DC fan motor assembly, see
4
procedures" [ 140].
INFORMATION
Check the DC fan motor power supply (voltage) circuit on the PCB.
2 Turn ON the power of the unit.
3 Activate Cooling or Heating operation via the user interface.
4 Check the functioning of the outdoor unit fan.
Outdoor unit fan ...
Rotates continuously (without
interruption)
Does not rotate or rotates for a short
time
5 Turn OFF the unit via the user interface.
6 Turn OFF the respective circuit breaker.
DANGER: RISK OF ELECTROCUTION
Wait for at least 10 minutes after the circuit breaker has been turned OFF, to be sure
the rectifier voltage is below 10 V DC before proceeding.
7 Check that the DC fan motor connector is properly connected to the PCB.
8 Unplug the DC fan motor connector and measure the resistance between the
pins 1-3, 1-5, and 3-5 of the DC fan motor connector.
Result: All measurements MUST be 51.9~57.3 Ω.
3
|
Action
Perform an electrical check of the DC
fan motor assembly, see
4
procedures" [ 140].
Replace the DC fan motor assembly, see
4
"Repair procedures" [ 142].
Action
DC fan motor assembly is OK. Return to
the troubleshooting of the specific error
and continue with the next procedure.
Continue with the next step.
Components
"Repair
"Checking
"Checking
Service manual
141