![background image](http://html1.mh-extra.com/html/daikin/ftxa20a/ftxa20a_service-manual_2459411153.webp)
2
|
Components
Service manual
153
FTXA20~50A(W)(S)(T) + FTXA20~50B(B)(S)(T) + RXA42+50A +
RXA20~35A(9) + RXA42+50B
Split Stylish R32
ESIE18-03D – 2021.05
2.20 Wifi control PCB
2.20.1 Checking procedures
1
As there is no specific check procedure for this component, first perform a
check of the indoor unit main PCB to check if the wifi control PCB needs to be
replaced. See
To perform a power check of the wifi control PCB
Prerequisite:
Stop the unit operation via the user interface.
Prerequisite:
Turn OFF the respective circuit breaker.
1
Remove the required plate work, see
2
Turn ON the power of the unit.
3
Measure the power supply voltage between the pins 4‑5 on the wifi control
PCB connector.
Result:
The measured voltage MUST be 10~16 V DC.
a
a
Wifi control PCB assembly
Is the measured power supply voltage
correct?
Action
Yes
Skip the next step..
No
Continue with the next step.
4
Measure the output voltage between between the pins 4‑5 on the connector
S801 on the indoor unit main PCB.
Result:
The measured voltage MUST be 10~16 V DC.
Is the output voltage on the indoor unit
main PCB correct?
Action
Yes
Replace the wifi control PCB wiring
harness, see
No
Perform a check of the indoor unit main
PCB, see
5
As there are no further check procedures for this component, perform a check
of the indoor unit main PCB to check if the wifi control PCB needs to be
replaced. See