Clear your head get yourself well positioned and think it through writing down all the data you grab and see what jumps off the page. Obviously head pressure is low and suction is high. Bad valves? Why would amp draw be normal at that case? Is it also overcharged because someone added gas at some point to 'fix' the faulty valves?
If you could valve off the high side I'd see if it could hold it's mud. That's a quick way to prove out the valves. Bad valves won't pump down especially if its over charged but this is an RTU right so no go on that.
What's your delta across the coil?
Shophound makes an excellent point in knowing whether your gauges are correct before you take all this for granted. I've spun my wheels on a few occasions only to later realize my test equipment (gauges) were giving me bad data.