good morning. we have six lg units (EN 61000-2 or EN 61000-3). one of the wall mounted units does not work even though all three compressors are working. This seemed to have occurred after a serious lightning thunderstorm. The remote control for the unit has operating batteries and the power had gone off at one point during the storm but was restored. Can you tell me if this unit can be operable without calling an electrician? Mimi Anderson, mimila53@gmail.com, 630-336-6490