Hello to the forum,

I have an ELECTRA inverter (AIRWELL) , multi (connected to two internal floors) external unit YBD018.

The units do not cool.

When I opened the outdoor unit, it displays a "it" flashing.

When I turned off the power and returned, the system introduced "353" after the "u3" series after the "AA" series, then "02" And finally "it".

Does anyone know what the fault is?

Moti