8E indicates a power fault in the control board on the motor circuit.
Samsung suggest unplugging the machine for around 10 minutes.
Plug it back in again and try the machine again.
If the fault persists you would be looking at a potentially very expensive repair.
The control board, motor or both would most likely need changing.
If this is the case, the most cost effective repair would be to obtain a quote from www.repaircare.co.uk
Their price includes parts and labour.
Try unplugging it, see if it does any more washes.
The coin in the filter should have generated a 5E error if it had jammed the pump.
Hope this is of some help
Let me know how it goes or if you need more help