Fujitsu · Air Conditioners
Both the red and green LED lights on the indoor unit flash four times simultaneously. This indicates a power supply issue to the unit.
Click steps to track your progress.
Check your home's circuit breaker panel to ensure the air conditioner's breaker is not tripped.
Verify that the power cord (if applicable) is securely plugged into the outlet.
If there was a recent power outage, the unit may simply need a few minutes to reset.
If the breaker keeps tripping or there's no power, consult an electrician.