When snow machines go bang.

One of the snow machines went bang and we were trying to locate the area of an elusive fault. Since it's hired equipment I can only go so far unless the hire company approves further exploration, but the fault may be tracking between live and neutral on the mains input on the PCB (it does have small anti-tracking slots), a local MOV or the main blower motor, although I don't think it's an issue.
These snow machines are slightly bizarre. They have clearly had a lot of development work put into them, including a custom round PCB with a very chunky transformer and suitable DMX decoding hardware. The main blower is housed in large drainage pipe with the fluid reservoir formed from equally large drainage pipe, then the whole lot is encased in a rolled stainless steel housing.

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