Response to suggestion.

The lid seal is damaged and it lets water go through and collect on the flood switch which may be triggering F1.

You will have to replace the lid seal. It is item 8 on page 14 of this diagram.

Hi - unfortunately my good friend it cannot be reset as one would like quite easily anyhow... water has found its way to the base of the drwaers and have activated the flooding switch - one could pull it apart to dry it - tip the water out from the base but if the leaks not repaired you will have the same problem later and will be on-going.

5 Fault Codes

Fault Code LED Display Fault Possible Causes

F1 ----#

The flood switch has been activated.

A leak has occurred in the base of the dishwasher.

Cause

 The fill valve has failed open.

 The flood switch is faulty.

 Excessive water has been added to a wash sub cycle, indicating leaking seal or siphoning.

hope this is useful tp you - let me know if you require further asspstance...

Recent changes in the law prevent soap makers from putting phosphates in dishwasher soap so they're not as effective as the were even a few months ago.  Unfortunately,  the solution is more thorough rinsing before loading.
http://www.appliance.net/2010/states-ban-phosphate-laden-dishwasher-soap-1988

Hello,
This sounds like the anti-flood device is activated which would suggest a leak,if the tray underneath has water in it then a float switch would activate and the dishwasher would constantly drain out.You will have to remove the dishwasher and remove side panels and determine where it is leaking.If you tilt the dishwasher backwards to drain out the water then mop up the water then restart the dishwasher you may see with a torch where the leak is coming from.

Hope this helps.

The problem was solved by opening the machine and finding that the bottom "Y" pipe that has 3 inputs is of extremely poor quality and perforates with pin holes allowing a small amount of water to squirt out. This triggers the anti flood and error status lights flash. The outlet pump is activated and machine does not do anything. You need to replace this hose or like I modified it to work from a 32mm Y plastic junction available from most hardware shops. The wire clamps for this was replaced by "jubilee" screw tight clamps.
I worked on a table and also removed the "Brick" placed at the bottom for balance purposes by cutting the back plastic down with a saw. This made the job very easy...

F1 indicates flood switch has been activated. I wouldn't advise you attempt repair on these drawers- they really require an expert to disassemble (I worked for F+P for 10 years!!). Depending on which model you have (DD603 or DD601v2), repair varies. 603 has a small circuit board that acts as flood switch- located in base beneath drawer- requires drawer to be removed for access. 601v2 model has polystyrene float that acts as flood switch-leaks usually caused by split lid seal(tricky to access- drawer has to be removed) In either case, a leak has occurred and activated flood switch. These drawers are very sensitive to detergents (don't use tablets!!), and the way they are loaded.
Would suggest you get service technician to remedy F1 fault

I managed to clean the filter inside the dishwasher and drain a little residual water. I then re-plugged in the appliance and the anti-flood device seemed to reset and I have n't had any problems since.

hi this is the electric pump thats in your dishwasher. its probably seized up.remove and clean it just might be dirty thanks the appliance doc,

Remove and check the "non-return valve" and make sure it's clean. It snaps out and in easily. See page 47 of the manual for this dishwasher.