I posted this in the wrong section, sorry.
The indoor unit is model ABT24LBAJ and the outdoor unit is a model AOT24LMADL. The fault codes or flashing lights is 14 on the green timer. This says outdoor fan.

I have replaced outdoor fan and it still runs hot for 20 minutes to 2 days then faults 14 flashes saying outdoor fan.

I replaced with 7 second hand outdoor PCB and the same fault same problem. sometimes it would run for 10 minutes (outdoor temp about 3-5c) and other times it would run for 3 days (about 10c).

The ambient temperature outside is quite cool.

To top it off sometimes the indoor unit is blowing cold air. It's a floor mount.

Sometimes it runs hot then faults when it hits defrost and other times it goes to blowing cold air instead of hot on indoor unit.

Thanks for all your help.

Scott New Zealand, its now winter.