Lennox LICH4024180P431-C Owner's Manual page 12

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