Hello,
I have a similar problem with our distributor, only ours has been working properly for about 10 years and now there is a problem, namely when refueling, the distributor stops refueling and after opening this, i.e. the cabinet, the 12V indicator flashes.
After disconnecting it from the power supply and reconnecting it, the distributor normally sets the price and works correctly.
In the last 2-3 weeks, this situation is repeated more and more often and the distributor will fill up once with 800-900 and other times only 20, 15 or even 2 liters ...
I noticed that after a longer disconnection from the power supply, I work longer, but after several attempts, it refuels less and less and disconnects more and more often ...
Please help or give me some pointers on what to look for.