Daikin Aurora Series Service Manual page 287

SiUS341802E
Service Diagnosis
Diagnosis Flowchart-5
UA-29
Error code Sub code
Is there
any branch selector
unit connected?
NO
Was the
outdoor unit PCB
replaced with a spare
PCB?
YES YES
Is the
procurement of the
spare PCB proper?
YES
Yes
NO
NO
Troubleshooting by Error Code
Incorrect system setup.
Check if system is heat pump or
heat recovery.
Replace the outdoor unit main PCB
(A1P).
Procure a proper spare PCB.
Replace the outdoor unit main PCB
(A1P).
274