2
|
Components
Service manual
116
FTXA20~50A(W)(S)(T) + FTXA20~50B(B)(S)(T) + RXA42+50A +
RXA20~35A(9) + RXA42+50B
Split Stylish R32
ESIE18-03D – 2021.05
Is the DC fan motor shaft friction
normal?
Action
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
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.
INFORMATION
The DC fan motor connector MUST be plugged into the appropriate PCB.
5
Confirm via the service monitoring tool that the DC fan motor assembly
receives an ON signal.
6
Turn OFF the unit via the user interface.
7
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.
8
Disconnect the DC fan motor connector S70 and measure the resistance on
the connector pins shown below. The measured resistance MUST be:
VDC
Comm
Resistance
VDC
Comm
Resistance
4
1
OL
1
4
OL
4
2
108 kΩ
2
4
108 kΩ
4
3
1.2 kΩ
3
4
1.2 kΩ
4
7
OL
7
4
OL
INFORMATION
The measured resistance values may deviate from the listed values due to instability
during the measurements.