U5
Daikin
Daikin air conditioner error U5
Meaning
Communication failure, between r/controller & PCB
General meaning for the brand's models, unless a model's own manual says otherwise.
Meaning
Malfunction of transmission between indoor unit and remote controller
General meaning for the brand's models, unless a model's own manual says otherwise.
Causes and how to check
- 5 possible causes
- the cited manual page, and follow-up questions
No account needed to look up codes.
Guides
- Communication error between indoor and outdoor unit: what to check, in which order
Communication (transmission) error codes usually come from the connecting wire, the supply or a board. The checks from easy to hard.