Washing machine keepings beeping during wash cycle

I have a Zanussi FJ 1354 S washing machine. During the wash cycle the PREWASH and RINSE HOLD lights will start to flash and the washing machine makes a beeping sound. This beeping will carry on indefinitely. To workaround the issue I just press the on/off button to turn it off and then on again when the machine then re-engages to one of the steps in the wash cycle.

It can vary the number of times you need to do this during a wash. Sometimes you can get lucky and it will only be one or two but sometimes it can be going off all the time.

The clothes seem to wash fine – it is just annoying having to switch it off and on again.

I have turned off the acoustic signal. However, this is only relevant to the buttons you press when you are selecting your programme and the end of wash cycle beep.