Since your Pressures Equalized lower than normal its is very likely that you have a LEAK in the system. The below Articles will help you locate your leak:
Normal Run Pressures:
R134: (Low) 5”HG – 5PSI (High) 85 – 110PSI
R600: (Low) 10″HG – 15″HG (High) 45 – 60PSI
Low Side Leak
Low Side: Lower than Normal
High Side: Higher than Normal
High Side Leak
Low Side: Lower than Normal
High Side: Lower than Normal
Undercharged
Low Side: Lower than Normal
High Side: Lower than Normal
*Restriction Close to Compressor
Low Side: Higher than Normal
High Side: Lower than Normal