No cooling in walk in freezer. One and a half horsepower 404a, comp mdl awa2460zxd. Suction in the fifties. Head upper 300's, subcool near 5, superheat in sixties. New TXV adjusted wide open. Compressor amp draw 10. No delta t in liq line indicating restriction. Guessing ambient in low 90,s Box temp 35.What am I missing befor I condem the compressor valves and replace it?