My Fisher & Paykel ICON+ CPAP machine has started cutting out. It works OK, but suddenly stops. The power is on, and the LCD has the word 'error'.

There seems to be no error number.

I've looked at the USB data, but it doesn't seem to contain any error data.

Any ideas of what this might be?

I've got a CPAP machine that automatically adjusts itself for altitude (a Fisher & Pykel machine). So that Isn't my question. I fly from sea level to 1,800 M (6,000 FT) where I stay for five days. I find that I'm tired through most of my trip. Sites that cover altitude adjustment say that it takes a...