Found main breaker on a/c to be tripped. Reset breaker turned unit on. Large spark happened at contactor. Found melted wires at contactor. Both L1L2 wires have heading that is melted Had to trim a bush next to air conditioner, so I could get to the service panel on the air conditioner. In doing so disturbed a yellow jacket nest in the bush. I think they were coming out of the ground. I’m not sure I couldn’t get close. You’ll need an exterminator to kill the yellow jackets when that happens. Call us back out and we’ll try to figure out What shorted on your air conditioner. Indoor breaker is off. Outdoor service disconnect is out. I was able to put a garbage bag over the top of the unit because I couldn’t put the service panel door back on.