Troubleshooting
114 Electrical Control
2.2. Self-diagnosis
Indoor unit’s LED indication
During malfunction or protection, the indicators and digital LED displays as follow:
For Duct and Ceiling-floor Units:
No Operation Timer Def/Fan Alarm Digital LED Display Malfunction or protection
1
X
☆
X X
E2 Indoor temperature sensor is abnormal
2
☆
X X X
E3 Evaporator temperature sensor is abnormal
3
X X
☆
X
E4 Condenser temperature sensor is abnormal
4
☆ ☆
X X
E7 EEPROM malfunction
5
X X X
☆
E8 Full-water malfunction
O (on) X(off) ☆(flash at 5Hz) ◎(flash at 0.5Hz)
For Super-slim 4-way Cassette
NO. Malfunction
Running
lamp
Timer
lamp
Defrosting
lamp
Alarm
lamp
Display(digital
tube)
1
Open or short circuit of T1 temperature
sensor
X ☆ X X E2
2
Open or short circuit of T2 temperature
sensor
☆ X X X E3
3
Open or short circuit of T2B temperature
sensor
X X ☆ X E4
4 Fault of water level sensor X X X
☆
E5
5 Outdoor unit malfunction ☆ ☆ ☆ ☆ E6
6 Indoor EEPROM malfunction ☆ ☆ X X E7
7 Full-water malfunction X X X ☆ E8
8
Communication malfunction between main
PCB and up-down panel PCB
☆ X ☆ ☆ F0
9 Up-down panel malfunction X ☆ ☆ ☆ F1
10 Up-down panel is not closed X O ☆ ☆ F2
O (on) X(off) ☆(flash at 5Hz) ◎(flash at 0.5Hz)
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