Hi guys , just visiting a new site and working in a vrv2 410 system, founnd system to be coming up with f6 fault, which is overcharge of refrigerant. Makes sense because apparently a couple of units have been taken off the system at some point so maybe incorrect charge was weighed back in, anyway my plan was to recover all the refrigerant have a measure up then weigh back in required amount, however!!! On further inspection it appears the pipe run goes all over the place and at some parts is literally impossible to get to to find out the route the length and the size of the pipe.
Anyone have any other suggestions before I I explain to the customer I am about to cause serous chaos in his property,
Was thinking maybe I could recover a little bit at a time and then run up the system???
??? Or am I asking for trouble

Thanks in advance