Heat pump not working after rain
I have a 3-ton heat pump and it keeps tripping the outside “disconnect” (that electrical connection outside near the unit) too.  It looks like it’s not tripped, but when I flip it off and then back on, the unit then comes on. 

Some disconnects have a “breaker” that you remove from the base unit mounted on the wall. If yours is like that, just pull it out and then reinstall.