While you wait for answers, we may have found some information which could help you.
Click here for Problem Buttons WorkingHow to fix FAULT E4 Units faults on elegance KYD-25?
Window Air Conditioner Squeaks in the Wind?
Air conditioning and heating problem?
Best source for parts?
It is about my Polti 2400 ?
Conia air con leaks water on the floor maybe 2006 model ?