Daikin FTXA20A - Wifi Control PCB; Checking Procedures

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 "2.8.1Checking procedures"[475].
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 "2.14Plate work"[4120].
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 "2.20.2Repair
procedures"[4154].
No Perform a check of the indoor unit main
PCB, see "2.8.1Checking
procedures"[475].
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 "2.8.1Checking procedures"[475].