I didn't because i was pretty sure it still had some in the system...
But when i get my car back next week i'm gonna check for sure... What is the easiest way to do so without tools, can I just push on one of the valves?

I just found the acura service manual for my car, and it is stated that if the pressure is below 200 kPa the A/C pressure switch opens the circuit to protect the compressor.

But it doesn't says clearly if the condenser fan should still turn on if the pressure is too low... Anybody knows about this?