Started Charging a R404A Walk-In Freezer, ambient temp was 30 degrees. HS 155 PSIG< LS 11PSIG. I've read where this website talks about condensing Temp of Ref must be at 105 degrees when doing low ambient charging. My problem was even blocking the condenser couldn't get the 105 degree cond temp with probe located at outlet of king valve.(Temp would only get to 75 degrees). FLA on comp was almost loaded 10.7 FLA running at 10.0 amps. Superheat was high but only if I shut off the condenser fan could I get the condensing temp up. Then operation of TXV sporadic. Just trying some info I read on this site. Box temp good around 0 degrees. I added ref 8 lbs and no change in liquid line temp...?