Amazingly, for a major brand, Hitachi offer practically zero online support fo rtheir product! No manual!
http://www.hitachi-sales.ae/eng/products/washingmachines/sf90hj.html
You could always try contavcting Hitachi and askinf for a manual and advice about the error code, but looking at the "commitment to customer support" absent from their website, I'd not hold out much hope.
One can only hope that a white goods engineer who knows about these items will happen along.
XXX
December 2015