MH EDS failures

Hi,

I've recently had two failures of newish MH EDS oxygens systems.
The units gave the fault alarm with every breath. I checked one
on the ground on the 'N' setting and it faulted with every breath.
The other failure was intermittant over several hours.

We checked the plumbing and changed the battery. Didn't help.

Both failures 'fixed' themselves. The intermittant unit worked
fine on the next flight several days later. The unit I checked
worked on the next flight after the pilot sniffed hard a few times
to get it started.


Anyone else noticed this sort of thing? Any ideas on what is causing
it and how to prevent it.


--
Philip Plane _____
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Glider pilots have no visible means of support