Here is my issued:
There are two Units of air conditioning of 12.5 Tons each one,
We noticed that one of the unit was not working, so that we called the Supplier in order to repair this problem.
They came and told us that the problem was the device of protection of the unit shows the fail "Open circuit"
The suppier said that due to variations of voltage the device opens the circuit, preventing a damaage of the unit condenser. The suppier recommeded that when we have this problem we can go to the breaker panel and open and close the breaker in order to reset
But passed the days, and then the unit continued with the same problem.
when the supplier came to do the reparations they measured and the values were correct.