Help required OASE pondvac 7003 PV

I inherited the above unit when I bought the house and have just tried
to use it for the first time.

The previous owner has gone off the radar

It appears dead. I have checked power fuses etc, but no joy.

Does anybody know if it needs priming in order to function ?

I would also appreciate the source of a user guide if it exists.

I have resisted the urge to take it to bits thus far.


thanks in advance



Chris