Hello how are you? Once the R410A has leaked or lost, the ideal thing is to remove everything from the system and reload it. The R410A is a mixture so it must be charged in liquid phase, the working pressure is 110psi to 120psi at a temperature of 25 ° C. The ideal way to evacuate what is left of the refrigerant in the system is to recover it in a disposable bottle, although there are people who dispose of it in the environment, it all depends on the rules of your country. remember that before recharging it again make a good vacuum to the system and load it in liquid phase greetings