Daikin · Simple Self Diagnosis by Malfunction Code | Daikin
If multiple indoor units are connected, this code indicates a communication problem between them.
Click steps to track your progress.
Turn off power to all connected indoor units.
Inspect the communication wiring connecting the indoor units.
Ensure all units are properly addressed and connected.
Restore power and check for communication.
If the error persists, a technician is required.