Leave it Out!
It's quite alright to pull and reset a circuit breaker to reset a faulty unit (much like turning your computer OFF and ON when it locks up). But if it pops on its own, leave it alone! It did exactly what it was designed to do - that is - save your day! Some years ago, a DC-9 crew reset a toilet pump circuit breaker that popped. (One reset). Instead of popping the second time, the pump motor caught on fire, which spread to the cabin. Diversion to Cleveland (or was it Cinci?) and half the pax perished before the EVAC. Circuit Breakers are not hi tech, as earlier described, and they may only work the one time. Did you know that all system breakers on the A330/340 are now located in the Avionics Bay, where the crew can't get to them? There are still some commercial breakers in the cabin, but the FAs are specifically told not to reset them.