It's not safe is it ?

[Hedgehog80]

Dd1 has broken the very expensive air conditioning unit we got only 3 weeks ago as her loft room was unusable in the heat. We had planned to use it for at least a few years and it was a big purchase.

It's ruined. Dh thinks "it'll be fine" and I said I can't use it as it could now be dangerous ? He thinks not
I'm right aren't I ?

I'm also totally gutted as we couldn't really afford it but needed it and now it's ruined and it's really upset me.
He didn't keep the receipt so can't claim on contents insurance can we ?

"For your safety ... do not use an extension cord or an adaptor plug"

Also when they talk about properly grounded socket that means the wall socket I think, not an adaptor,or extension.

Just something to think about before you plug it back in.

Absolutely

The manual says don't use an extension (as PP) and that it must be on a suitable surface (floor) and common sense would suggest anything with wheels can and probably will move.
The manual also SUGGESTS that if it falls over (with the assumption it is not falling off something like a table) then it will most likely survive unharmed but should be left for a while for the refrigerant to get itself into the correct place (like fridges and freezers).
Power sockets in your house will be properly 'grounded' by law, but extension cables MIGHT NOT have a ground connection, hence don't use them. Extensions may also not be rated suitably for the power this unit takes, whereas a wall socket will. Having this unit plugged into a 'cable reel' type extension where most of the cable is still wound on the reel could be a significant fire risk.
Although often in 'fine print' cables wound into a coil or on a 'reel' must not be used to power high consumption units, they MUST be unwound otherwise they can and will get hot.

No don't use it. There was a huge fire in a house local to us last year and it was a faulty air conditioner that caused in. The whole place went up in minutes!