In order to fix this problem you'll need to isolate the unit from the power for 2 minutes and then restart.
After restarting and the error code is still showing then the indoor PCB needs to be replaced. These error codes are signifying that the memory chip on the PCB has malfunctioned and lost its memory.
To replace the PCB you can contact us via email at info@airconditioningcentre.com or call us at 0370 3344 556.