Friga Bohn SKB 19 four Evap fans low temp application. Hi can any one shed some light on a fault I have, just in the process of changing a Evap in a low temp cold store due to ice balls in the coil, if you were to see the coil its like some one has been at it with a machine gun, ice balls have formed in the coil growing up to about 10cm to 15cm bending coil pipes and heaters, but no ice any were else, all defrost heaters were, working, set at –25C two coils in a store, the only difference with this coil and the one in the same room is the restricted air flow to the coil, if you were to imagine the room, the left side with the damaged coil is floor to ceiling with stock 7 meters high with a 1 meter air gap at the top, and a 2 meter zone around the coil, I suspect this is problem