Troubleshooting
Electrical Control 241
2.2. Self-diagnosis
Indoor unit’s LED indication
During malfunction or protection, the indicators and digital LED displays as follow:
For A5 Duct, HSPD, Ceiling &floor type:
No
Malfunction or protection Operation
Timer
Def/Fan
Alarm
Digital LED Display
1 T1 temperature sensor open or short circuit
X ☆ X X
E2
2 T2 temperature sensor open or short circuit
☆ X X X
E3
3 T3 temperature sensor open or short circuit X X ☆ X E4
4 Indoor EEPROM malfunction
☆ ☆
X X
E7
O (on) X(off) ☆(flash at 5Hz)
Note: Digital display is available for duct type.
For Super-slim 4-way Cassette Type:
NO.
Malfunction
Running
lamp
Timer
lamp
Defrosting
lamp
Alarm
lamp
Display(digital
tube)
1
T1 temperature sensor open or short circuit
X ☆ X X E2
2
T2 temperature sensor open or short circuit
☆ X X X E3
3 T3 temperature sensor open or short circuit X X ☆ X E4
4 Indoor EEPROM malfunction ☆ ☆ X X E7
5 Water level alarm X X X ☆ E8
6
Communication error between auto-lifting
panel and slim cassette
☆ X ☆ ☆ F0
7
Auto-lifting panel is faulty (for slim cassettes
with an auto-lifting panel)
X ☆ ☆ ☆ F1
8
Auto-lifting panel is not closed (for slim
cassettes with an auto-lifting panel)
X O ☆ ☆ F2
O (on) X(off) ☆(flash at 5Hz)
For Compact cassette Type:
NO.
Malfunction
Running
lamp
Timer
lamp
Defrosting
lamp
Alarm
lamp
1
T1 temperature sensor open or short circuit
X ☆ X X
2
T2 temperature sensor open or short circuit
☆ X X X
3
T3 temperature sensor open or short circuit
X X ☆ X
4 Indoor EEPROM malfunction ☆ ☆ X X
5 Water level alarm X X X ☆
O (on) X(off) ☆(flash at 5Hz)
For A6 Duct:
Malfunction
Error Code Timer Lamp
(flashes)
Indoor EEPROM malfunction E0 X 1
T1 temperature sensor open or short circuit E4 X 5
T2 temperature sensor open or short circuit E5 X 6
Refrigerant leakage detection EC X 7
Water level alarm malfunction
EE X 8
T3 temperature sensor open or short circuit F2 O
3
Dual chips communication malfunction FA O 11
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