The problem happen again with the same unit , or with replaced new unit ???
If this was the same unit, I suggest you to replace it with the new unit.
Based on my communication with Fuji, they assume the lack of the airpuressure of the pump
causes this problem. They didn't teach you how to adjust it when they did the technical
training there. Ronnie will visit you some time this month to invest the reason for the cause.
Thanks,