Air conditioners reset necessary?

Hello municipality, I have the following problem. With my Phaeton 3.0 TDI, Bj 2008,GP 1, Sunday was changed due to a leak of the capacitor, refrigerants filled up and the error memory read / quenched. Air conditioning ran until this morning also wall-free. Then in the afternoon the surprise, vehicle was heated up and air conditioning also jumped on (ventilation full pull). After about 4 minutes the ventilation subsided and there was no more cooling power. After a short shopping stop, the air conditioning system started again after restarting the engine (good cooling power) and then switched off again after a few minutes. Once again, the engine was turned off, briefly maintained and restarted, air conditioning was running again. What about the cuckoo can that be? ???? Has anyone had a similar phenomenon or can help me? Can the air conditioning system be reset manually and without error-reading device? If yes, how does it work? Greeting Torsten