Is it possible that there is a 220 volts but low current?

[Sevs evans]

I read at the power outlet,the meter detect 220 volts but the split type AC doesn't work.it happens when I used the back up generator.

 

[Dr.D]

To answer the question in your title line, yes, you can have 220 v potential but no current. This is simply an open circuit situation.

 

[berkeman]

I read at the power outlet,the meter detect 220 volts but the split type AC doesn't work.it happens when I used the back up generator.

Welcome to the PF.

We need more details in order to be of help. What country are you in? What is the electrical service to your house? For example, here in the US it is commonly 2-phase, with 240V between the outer phases and 120V from each phase to Neutral. Is that what your house is fed from the distribution pole outside?

And what kind of generator do you have? Can you post a link to the datasheet or description? How do you connect the generator to your house? Do you have an approved "Anti-Islanding" switchover circuit? https://en.wikipedia.org/wiki/Islanding