Fehlercodes: E12_ECOi_ME1

Alarm Code E12
Alarm meaning Automatic address setting start is prohibited.
Alarm conditions Automatic address setting was started when automatic address setting was in progress at another outdoor unit in the same link.
Probable cause

Automatic address setting is in progress at another outdoor unit.

Check This alarm is not displayed on the remote controller. Therefore check the blinking on the outdoor unit PCB.
Correction Then start automatic address setting again. Wait for automatic address setting to be completed at the outdoor unit where it is currently in progress.