Thank you Andy,
I've done the following opened the door, turned the power off, drained the system, and removed the soap tray.
Holding in the start button (S1) turned on the mains, I then held in the programme options button (s4) for a count of 12.
All the LEDS turned on. I think this means it has entered it test mode.
I closed the door.
I pressed the start button S1
Light L6 started to flash I think this means is progressed in test mode.
Looking inside the soap hole I saw water run from
the middle hole for 2 secs
the left hole for 2 sec
the right hole for 2 secs
Then water ran in from the left hole till there was about 30mm of water showing in the drum. Whilst this happened I monitored the pressure sensor This started at 0.48v and rose to 1.4v
the valve then shut and nothing else happened.
I pressed the start button (s1) again and the flashing lights changed to L6 and L1 and the display said END.
I think this means that the level sensor are in error, however the 1.4v seems to be about right I think,
I have independently checked the other level switch and it seems to be working OK - not sure when it should switch?
I have a spare electronic level sensor and that operates just the same.
Other things I know - there is 380v DC knocking about on the frequency motor driver card.
The drain cycle works to empty the drum.
Not sure where to go now.