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Troubleshooting
Error Codes
Number
Cause
The number of
flashes per
second
Timer indicator
Error Code
1
Indoor EEPROM (Electrically Erasable Programmable
Read-Only Memory) error
1
Off
E0
2
Indoor and outdoor unit communication malfunction
2
Off
E 1
3
Indoor fan speed malfunction
4
Off
E3
4
Indoor room temperature sensor error
5
Off
E4
5
Evaporator coil temperature sensor error
6
Off
E5
6
Refrigerant leak detection system malfunction
7
Off
EC
7
Water level alarm malfunction
8
Off
EE
8
Dual indoor unit (twin model only) communication
malfunction
9
Off
E8
9
Other twin model malfunction
10
Off
E9
10
Overload protection
1
On
F0
11
Outdoor temperature sensor error
2
On
F 1
12
Outdoor condenser pipe sensor error
3
On
F2
13
Discharge air temperature sensor error
4
On
F3
14
Outdoor EEPROM (Electrically Erasable Programmable
Read-Only Memory) error
5
On
F4
15
Outdoor fan speed (DC fan motor only) malfunction
6
On
F5
16
T2b sensor error
7
On
F6
17
Auto-lifting panel communication error
8
On
F7
18
Auto-lifting panel malfunction
9
On
F8
19
Auto-lifting panel is open
10
On
F9
20
Inverter module IPM protection
1
Flash
P0
21
High/Low voltage protection
2
Flash
P 1
22
Compressor top overheating protection
3
Flash
P2
23
Outdoor low temperature protection
4
Flash
P3
24
Compressor drive error
5
Flash
P4
25
Mode conflict
6
Flash
P5
26
Compressor low-pressure protection
7
Flash
P6
27
Outdoor IGBT sensor error
8
Flash
P7
