service call to walk in freezer not holding temp today got stumped and frustrated not sure what was going on. upon arrival box 12 degrees
404a ambient temp 92
suction pressure 22 = -15 degree evap coil
liquid line pressure 275 = 110 condensing temp
compressor drawing 8.4 amps rla 9.9
superheat 9 degrees
did not check sub cooling definitely should have
all fans were running and coils clean
Box would not pull below 10 degrees
the unit has a head pressure regulating valve, these always seem to throw me off because if the unit is low on gas it will still hold my head pressure somewhere near where it should be , right? but i had nothing leading me to think it was low on gas because my superheat and suction pressure was within range.
just looking for some opinions.