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A/C failure....Low voltage?

1K views 4 replies 2 participants last post by  Dr. Roy 
#1 ·
recently bought a minisplit A/C (230V), that has stopped working, while checking the line voltage I am only getting 201-203V at the unit and the same reading in the main breaker panel, why so low?.... i am getting 115-117V on eack leg to neutral so shouldnt i be getting somwhere near 230V across both legs.
could it be con-edison lowering the power during a 90 drgee day in NYC w/ almost 100 humidity w/ everone running thier a/c's?
 
#4 ·
The voltage reading pretty much confirmed it.

If the power feed is overhead, there'll likely be 3 transformers on the pole. If it's underground, you'd need to look inside the transformer. But it's locked up; as it should be.

The meter is another clue. If it says 240 volt, it's 120/240 single phase. If it says 120 volt, it's 120/208.

Rob
 
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