We've got an Electrolux RM 185 in our 1990 T25 and on the hook-up it works fine, on the battery I think it works (although it seems to be far less effective than on hookup) but when I try to put it on gas, the little red light flashes and I can hear it clicking, but i'm waiting in vain for a woompff (yes that is how you spell it

) but alas it just stops after a while.
My questions are: Does anyone have a manual for it? I've found one in German and one in Swedish but not one in English.
Is it necessary to get the air out of the pipes before it starts? (I don't think it's successfully run on the gas for years)
Is there an easy way to diagnose what's wrong?
Many thanks
Jules
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