Air Cond in Cat 5

Make sure that the 30 mA breaker on the climatisation-air acond breakers panel is up (on)

Turn Generator on from the panel above the galley desk, Black Switch. Press on the top part

Make Sure that the power selectors at the power panel under the galley window are pointing to the generator

Make Sure AC pump is on at the breakers board

Make Sure the unit you are trying to use is switched on at breakers board.
In this example, saloon 1

From the Unit AC panel , make sure is on Cool mode

From the Unit AC panel , select temperature with arrow down and arrow up

From the Unit AC panel , select fan speed with fan icon