FG3 | Control box not communicating with daughter board. | 1. Reset power to the control box and wait 10 minutes 2. Check connections whilst waiting. 3. Reconnect power and wait 5 minutes. 4. If the FG3 error does not clear, please replace the control box or contact the help desk. | CB, Link Cable | Communication error | 1. Wait 5 minutes to see if the error clears itself. 2. If no, reset power to your mains (leaving off for 15 minutes). 3. Once power has been restored to the touch screen wait an additional 5 minutes and test the system. 4. If the error has still not cleared, please contact you A/C specialist. | Control box not communicating with daughter board or dictionary (except for Samsung) |