Daikin VRV EMERION REYQ-AATJA Service Manual page 442

Troubleshooting by Error Code
435
Diagnosis Flowchart-5
UA-25
Error code Sub code
Is the wiring
NO
between outdoor unit
and Branch Selector
unit correct?
YES
Diagnosis Flowchart-6
UA-26
Error code Sub code
Is the wiring
NO
between Branch Selector
units correct?
YES
SiUS372201EB
Correct the wiring.
Replace the outdoor unit main
PCB (A1P).
Correct the wiring.
Replace the relevant Branch
Selector unit PCB.
Part 6 Service Diagnosis