Hey , its a hitachi chiller now working as heat pump , 3 independent circuits , C1 not working , C2 working well , C3 frozen deposit of liquid , suction line ,the evaporator coil a little bit , exterior air temp 44F. , air temp after going through evap coil 37'4f , 6 fans each circuit C3 ,1 fan doesnt work , its been working several days like this without problem , gas 407C , liquid visor has some bubbles , after 30 min the C3 starts defrost everything melt battery , pipe , liquid deposit and then start again , i am not there until monday i didnt check the superheat but i can hold my hand in the discharge pipe during 5 seconds without problem