If you don't have electrical power in your unit, you may need to contact your utility provider to determine the cause of the issue. Most electrical outages are due to temporary problems like fallen lines.
Did you trip the circuit breaker?
If you overload the electrical circuit within your home, you may trip the breaker. Locate yours and make certain the lever is in the ON position. If it's not, flip the lever back to the correct position.
Be careful not to overload your circuit.