Questions about prepaid electric meters

Because you used electricity, the property certainly has the right to ask for a supplementary electricity.

If you can prove that the meter is a quality problem, the manufacturer may change it for you, but there is nothing to compensate. "

If the mechanical part works normally, you can prove that you used electricity! You use "electricity bought by the property", which has nothing to do with the power bureau, but the national power supply regulations say that you have to pay the electricity bill. So the property management can let your friend pay according to the remaining electricity in the "mechanical part".

Your friend was not at fault in this incident (the failure of the electric meter was purely accidental), so it is definitely unreasonable for the property to be fined.