6 Indoor EEPROM malfunction X X X E7 ☆ 7 Refrigerant Leakage Detection O X EC ☆ ☆ 8 Outdoor unit malfunction X X X Ed ◎ 9 Indoor fan speed is out of control X X E8 ☆ ☆ Communication malfunction between main 10 X F0 ☆ ☆ ☆ PCB and up-down panel PCB 11 Up-down malfunction X F1 ☆ ☆ ☆ 12 Up-down panel is not closed X O F2 ☆ ☆ Communication malfunction between master 13 X X F3 ☆ ☆ unit and slave unit 14 Other malfunction of master unit or slave unit X X F4 ☆ ☆ O (on) X(off) at 5Hz) at 0.5Hz) ☆(flash ◎(flash Notes: Digital display is only available for super-slim 4-way cassette & duct type. F0,F1,F2 are only available for super-slim 4-way cassette 2.3 Outdoor unit malfunction Display Malfunction or Protection E0 Outdoor EEPROM malfunction Indoor / outdoor communication error E2 Communication malfunction between IPM board and outdoor main board E3 E4 Open or circuit of T3 or T4 temperature sensor E5 Voltage protection of compressor E6 PFC module protection (Only for 48K with 1 phase) P0 Top temperature protection of compressor P1 High pressure protection P2 Low pressure protection P3 Current protection of compressor P4 Discharge temperature protection of compressor P5 High temperature protection of condenser P6 IPM module protection P7 High temperature protection of evaporator In low ambient cooling mode, the LED displays“LC” or alternative displays between running frequency and displays 0.5s) “LC”(each
6 Indoor EEPROM malfunction ☆ X X X E7 7 Refrigerant Leakage Detection ☆ ☆ O X EC 8 Outdoor unit malfunction X ◎ X X Ed 9 Indoor fan speed is out of control ☆ ☆ X X E8 10 Communication malfunction between main PCB and up-down panel PCB ☆ ☆ ☆ X F0 11 Up-down malfunction ☆ ☆ X ☆ F1 12 Up-down panel is not closed ☆ ☆ X O F2 13 Communication malfunction between master unit and slave unit X ☆ X ☆ F3 14 Other malfunction of master unit or slave unit X ☆ ☆ X F4 O (on) X(off) ☆(flash at 5Hz) ◎(flash at 0.5Hz) Notes: Digital display is only available for super-slim 4-way cassette & duct type. F0,F1,F2 are only available for super-slim 4-way cassette 2.3 Outdoor unit malfunction Display Malfunction or Protection E0 Outdoor EEPROM malfunction E2 Indoor / outdoor communication error E3 Communication malfunction between IPM board and outdoor main board E4 Open or circuit of T3 or T4 temperature sensor E5 Voltage protection of compressor E6 PFC module protection (Only for 48K with 1 phase) P0 Top temperature protection of compressor P1 High pressure protection P2 Low pressure protection P3 Current protection of compressor P4 Discharge temperature protection of compressor P5 High temperature protection of condenser P6 IPM module protection P7 High temperature protection of evaporator In low ambient cooling mode, the LED displays“LC” or alternative displays between running frequency and “LC”(each displays 0.5s)
U2MRT-Light-Commercial-Lot11.docx