Hello again, Goodman is not listing the flash codes for that model, a good sign that it is Chinese made and short on paper work.
So far I have not found it on line elsewhere.
There might be a code list printed on the outside units wiring diagram or on a sticker next to it.
There are hundreds of thousands of these ductless AC systems imported annually, from 6 or 8 different chinese manufacturers, and with all of them making changes and with different models frequently.
The chances of any one of us here having seen that particular model are in the range of one in ten thousand, or something like that.
Meantime if you like we can continue without the flash code, and look for an installation error.
Your description of the under deck installation indicates that it is getting plenty of air flow.
The next suspect is that it is over charged with refrigerant...or undercharged with refrigerant possibly due to a refrigerant leak.
An over charge of refrigerant will cause the unit to run hot, and trip the compressors heat sensitive overload... it will reset itself once the compressor cools off.
Chances of that being an accurate assessment are in the 70% range, I would need to know the low side and high side pressures to know if that is accurate or not.
The key indicator of an over charged system is demonstrated incompetence by the installer... those will say 'it has the proper charge in it'.
A competent technician will not say that... he will say 'the suction pressure
is 107 psig with the room at 75F, and the compressor fully loaded, and the head pressure is 397 psig with the outside air at 102F, system uses R 410a refrigerant"
This is regardless that these systems come pre-charged with refrigerant.
That is the only correct way of describing the refrigerant charge (my numbers here are arbitrary to demonstrate the point).
Call the installer on the phone and ask 'how the system was charged'
That will tell us a lot about might be going on.
We can go from there.