Initial call was circuit 2 HPCO. After reset I have low suction 50 psi, discharge 100 psi and flashing sight glass. R407C, 30 degrees ambient.
Receiver upper sight glass is maybe 3/4 full.Discharge gas line warm up to tee into coil, then from tee to head master, receiver and liquid line all at roughly ambient.
Any thoughts on this? Stuck valve, receiver heater etc. My plan is to verify heater is working first, but I really haven't had any experience with these so I thought I'd ask for help.