I have an Ariston LL65 and the eco and rapid light are flashing

AL03 - Drain Timeout (drain problems)
LED 1 (washing) and LED 2 (drying) flashing.

Probably the siphon of the apartment is clogged.

• Remove the drain hose and make sure that is not clogged.
• Drain water in a bucket.
• If the dishwasher drains the water, clean the siphon of the apartment.

Dado

Your dishwasher is equipped with a safety system which is able to detect any operating problems. These anomalies are reported by
one or two wash cycle indicator lights "E" will flash rapidly.

Any flashing combination of LED diodes (Intensive wash, Regular wash, Eco wash, Rapid wash, Soak and Crystal care) means different error code. Take a note of which lights are flashing?

If you have problem with fill water than following two LED should be flashing.
In this case could be:

• Water valve disabled
• Turbine disabled
• Control board faulty

Dado

try getting owners manual on line.

Obstruction in the hose or the pump, flush with extra hot water and don't burn yourself, hope this helps.

Ariston LI6401-Washed a load. Last light on R control panel (Eco Wash) is blinking rapidly and didn't dry the dished.Turned pwer off then on. Did same type of wash. New maching-This is about the 6th wash

You did not mention what model number that you had but this is what I found after a little digging:

From http://servicetechhelp.com/discus/messages/2801/6823.html?1205974228 :
For future reference, the technician who replaced the control board for me gave me a complete list of flashing LED fault codes for the Ariston LL65 (which are same as Ariston LL64):

001000 Float Switch: Water in Base Pan
001100 No Drain: Dranin Motor Disabled, Filters Clogged, Dramin Hose Blocked
001010 Main Motor Presure Switch Blocked Filter
100100 Control Board: Software of Control Board not Recognized.
000100 Water Valve: Water Valve Diabled <--- This one sounds like your error
000110 Fill Fault: Water Valve Disabled, Turbine Disabled or Control Board
000101 Heating Element disabled or High Limit Open or Control Board
000010 NTC defective or not positioned or control board
000001 NTC defective or not positioned or control board

KEY: 0 = LED off
1 = LED flashing


I also found this for a different model:
http://www.diybanter.com/home-ownership/89945-resetting-controller-ariston-dishwasher.html
No Program Code Fault condition
1 Heavy wash 1000 Operation of flood
protection system
2 Normal wash 0100 Heating
element/Thermistor/Thermostat fault
3 Rapid wash 0010 Drain pump fault or drain
blockage
4 Soak wash 0001 Not filling to correct
level within 6 minutes

This just started happening to me too. Don't know how to fix it either. If i find something I'll let u know.

did you fill the rinse aid compartment fully?

DRAIN MOTOR IMPINGEMENT

had something jamming pump impeller which prevented machine pumping water out. The motor is connected by a bayonet fitting to the pumpand is easy to get at and clear obstruction.