WSHP with a bad gas problem

[gbfromsd]

Boss sends me out on a Saturday to pull out a WSHP and leak repair. Tech before me located the leak. Still had 90psi in it so I knew it was low on gas to start with. I put the unit back up and fired it up expecting to top off the charge and got some wierd readings.

340/58 77*liquid line, 77* suction, 1 degree TD on the
evap!

Scratch my head wondering what the heck I did to
this unit until it hit me. The gas in the unit was
nitrogen w/22 trace. Doh!

[kyservtech]

just wondering, how did you fix the leak while it was still under pressure?

[gbfromsd]

turns out the high side service port schraeder was bubbling.