Help aircon fault

just turned on the aircon to have it pop and trip house and van circuit boards. There was a brief pop from the rear of the unit. I guess something has shorted since I cannot reset the trips in the van. Looked at the handbook but no advice on how to even open the thing. Any suggestions would be welcomed.

Habitation air con? If so the start up current is stated as being quite high. Having said that we have never tripped even a 6A MCB on start up but we were using it often (we weren't sure of the gas heating at one stage so we used the air con) and it may not have needed an extra boost starting.

As for getting to any circuits, sorry - no idea.

Yes habitation aircon. fairly sure it must be a short form whats happened, but the handbook is useless just assumes you will take it to an an authorised dealer

back in the days before I could afford a Haynes manual I bought a cheap series of manuals. These had such advice as "Starting the engine? Too difficult for an untrained mechanic - take it to the nearest trained mechanic."  OK, not exactly that low but nearly everthing from changing a light bulb came in that category.

Which part are you trying to get to? The elctronics within the air con unit? And is it a roof mounted Truma like ours? I'll have a look in my manual later although I suspect the advice will be the same.

Thanks for the offer its a domestic freshet. Just trying to open the filter area would be a start, or working out which fuse it's off that way I could have the rest of the van working.

What has it tripped? One of the over-current circuit breakers or the RCD? If the former then just trial and error with the MCBs should tell you which one it is. If the latter it may be more problematic depending on where the fault is.

It would not be unusual for water ingress into an appliance to cause an earth leakage fault - though your description of a pop from the unit itself suggests that it may be an over-current fault...

Looking at the Freshjet you will see the air inlet filter.  At the middle of one side (left hand from front) you will see an indentation. That's where you lever up.  If I recall there are two nibs one either side of the indentation which will pop out with a little effort, but they are tight, and then one each in the middle of front and back of the unit - those two are even stiffer and quite frightening to open. If you can it would be useful to put a hair drier onto the three sides of the unit to warm the plastic so that the nibs don't shatter.  That will expose the inside and hopefully the connections and the problem.
Manual is here:
https://www.dometic.com/en-gb/uk/support/dometic-freshjet-1700-_-20694

Thank you both for your responses. I have now got the filter down and had a quick look inside, no obvious indications of anything wrong. Looks like a trip to Marquis again, another day wasted and bank balance hammered I expect.