F is no pilot light or no gas to system. ensure you have gas and also that you have either the Button on Auto or Electric. Post back, will find you a troubleshoot chart in a sec.
The A is no AC to the unit. Ensure it is plug in. Take the panel off the back on the Outside and ensure it is plug in. Also you will have to bleed the air out of the system to get it to light the first time. Turn on a cook top burner and light it and at lease two more and let them run for a few minutes. Post back
Do you have 110 volts to the rest of the RV. TV, Microwave.
https://100refrigerator.com/norcold-refrigerator-error-codes/
