Had a odd one today. 404a Walk in running warm. I arrive and go inside box. Hear the liquid line hissing like it's low on gas. grab line and it's hot. Threw my low side gauge on the evap and suction pressures 80 psi. WTF is my condensor fans out. Well, i find out one of them is, But, other 2 are running and condensors is spotless. Head is close to 400. SG is flashing!! What do you think is wrong with it? This is a coldzone rack system. Other systems on same rack are doing ok even though one fan is out.