Maybe foolishly I brought several 50Hz UK machines with me when we moved to Philippines, a 60Hz 230V country. Apart from shipping damage both the washing machine & dishwasher required 60Hz lift pumps in order to reliably drain water. Somehow the controllers also became corrupted & have been replaced. Whereas the Hotpoint wash M/C functions fine the dishwasher runs through wash cycles taking approximately twice the expected run time and beeps continuously. The second from the left (wash)light flashes quite fast. Occasionally the 1st & 3rd from the left lights flash instead. Your Indesit fault codes suggest suggest checking the water input components in the 1st case and the heater & thermistors in the latter. I did have an earth leakage fault which cleared when the replacement heater element, bought from yourselves, was fitted. Tracing out the circuit I see that the water level switch also provides an input to the controller via a small grey wire which connects to J001 pin3. COULD THIS SWITCH CAUSE MY PROBLEM?. I have previously, whilst waiting for the replacement controller, constructed a manual test box to check each drive and most of the sensing functions but of course it was a static test which was performed. In the case of this switch a neon lamp verified the switch contact.
I will willingly send my diagram if it is of use to you.