Sharp Air Conditioner Error Codes   E7 20 Laser beam sensor trouble (BLACK) E7 21 Laser beam sensor trouble (CYAN) E7 22 Laser beam sensor trouble (MAGENTA) E7 23 Laser beam sensor trouble (YELLOW) E7 24 Laser beam detection trouble (BLACK) E7 25 Laser beam detection trouble (CYAN) E7 26 (Laser beam detection trouble (MAGENTA)