walk in freezer icing after expansion valve
When I arrived discharge temp from evap was about 10 degrees.
everthing after expansion valve frosted over.
Sight glass was not clear
outside ambient temp about 20 degrees
only one condensor fan running due to ambient temp
cond labeled R404A but there is possibility of mixed refrigerants according to owner
low psi 3 lb high around 150 and sub cooling to low to read accurately.
Since I knew siht glass should be flooded wspecially with such low ambient temps I added some 404a.
low only rose to about 5 lbs high rose to about 250 and sub cooling also went up to about 15 degrees
Discharge temp in box droped to about 10 degrees and sight glass was still bubbling although not as much.
At this point something happened between my boss and owner I guess about price so I was asked to pack up and leave but was wondering what you veterens would have done next and if you had to guess what would you think the problem was.
Also did put into defrost and defrost cyle was working although there did not seem to be any type of pumpdown. Condensor just turned off when t went into defrost.
Thaks in advance for your response