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Components
Service manual
141
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
▪
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?
Action
Yes
Perform an electrical check of the DC
fan motor assembly, see
140].
No
Replace the DC fan motor assembly, see
To perform an electrical check of the DC fan motor assembly
1
First perform a mechanical check of the DC fan motor assembly, see
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 …
Action
Rotates continuously (without
interruption)
DC fan motor assembly is OK. Return to
the troubleshooting of the specific error
and continue with the next procedure.
Does not rotate or rotates for a short
time
Continue with the next step.
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.