Answer to Question #184988 in Mechanical Engineering for reddy

Question

procedure of welding split air conditioner leakage in steps 

Answer 1

Accurate diagnosis of a refrigeration system leak

1. First, see the lost cooling capacity to diagnose just why the system is not working.
2. If you know that the refrigerant level is low or zero, don't just re-charge the system. Find and fix the refrigerant leak.
3.  If the refrigerant gas leak is in a valve or access port, such as the service ports to which the HAVC  technician connects her gauge set, the valves there may be able to be cleaned and salvaged, or the valves may need to be replaced.
4.  If the refrigerant gas leak is in the air conditioning or heat pump copper tubing a repair should be easy - the damaged line is re-soldered using high silver content solder and a high-temperature torch.
5. If the refrigerant gas leak is in the condensing coil or in the evaporator coil, repair might be possible, but we're less optimistic that repair is possible, but it might be, as we explain 
6.  Use a halogen gas leak detector to pinpoint refrigerant gas leaks and for thorough inspection & testing of the entire refrigerant piping system, including the condensing and evaporating coils.