Ac breaker flips on heat/generator

Liberty44140

Marine air 16k unit. This is only in heat mode (which I know draws more amps than ac). The last two weekends we left the harbor with the genny running and both the cabin and cockpit units on in heat mode. Two times now leaving the harbor the cockpit unit breaker at the panel has flipped, cabin all good (they are on separate main breaker power lines). The admiral will go flip it back, and it’s fine the rest of the trip, just needs popped back once. I’m going to replace that breaker, but should I replace the capacitor too? Any other thoughts? 

aero3113

Could just be a weak breaker, strange that it’s fine once it’s reset though.

Liberty44140

Yea that’s what has me wondering if the capacitor is going.

Handymans342

Without a schematic I don’t know if the reversing valve is energized or not in the heat mode. 

Aqua_Aura

Is it possible to swap the breakers?

Liberty44140

AA, yes I may try that assuming there are two with the same amp, but for the cost of the breaker I figure might as well replace as it takes the same amount of time.

handy, schematic of just the unit? Or of the wiring from the control to the unit?

Aqua_Aura

True. Just thought maybe it could be done quicker if you had to wait awhile for a breaker. 

Handymans342

Just the unit showing the control board too