sorry for the confusing statement i made, i didnt mean that it was making any sound
Alarm codes generally mean it is a circuit failure
there are also warning codes that are function faults like trying to operate a function out of sequence.

But the explanation of what those codes are is what i posted earlier :o)

zapi and sauer danfoss usually use these code prefixes is why i said it 'sounded like it was a zapi controller'