Indoor Unit Main Pcb; Checking Procedures - Daikin Emura RXJ20A5V1B Service Manual

4.9 Indoor unit main PCB

4.9.1 Checking procedures

To perform a power check of the indoor unit main PCB
RXJ20~50A + FTXJ-A(W)(S)(B)
Split Emura 3 R32
ESIE22-04B – 2022.08
a Indoor unit fan motor cover
4 Install the switch box, see
Is the problem solved?
Yes
No
INFORMATION
It is recommended to perform the checks in the listed order.
Prerequisite: Stop the unit operation via the user interface.
Prerequisite: Turn OFF the respective circuit breaker.
Prerequisite: Remove the required plate work, see
1 Turn ON the power of the unit.
2 Measure the voltage between the pins 1‑4 of the connector S300A on the
indoor unit main PCB.
Result: The measured voltage MUST be 324 V DC.
a
4
"4.14 Plate work" [ 144].
Action
No further actions required.
Return to the troubleshooting of the
specific error and continue with the
next procedure.
"4.14 Plate
4 Components
|
4
work" [ 144].
Service manual
103