Repaired a refrigerant leak on condensor coil friday.had 200# nitrogen system dropped to 190 from friday till today.i jacked her up to 350 it does drop quicker but illbe ##### if i could find a leak. bubbles put somee 22 in her w/nitrogen and used my h-10g nothing.usually that will go crazy but i couldnt even find a trace.this is the old trane unit with splash coil.my boss says pull a vaccum if it pulls down good charge it up. any advice???the only thing I can think of is to try and isolate evap and condensor????