Lennox MPA009S4S Service Manual page 96

Running Light State of
Short Flashes Timer Light
1 time OFF
2 times OFF
4 times OFF
5 times OFF
6 times OFF
7 times OFF
8 times OFF
1 time ON
2 times ON
3 times ON
4 times ON
5 times ON
6 times ON
1 time Flash
2 times Flash
4 times Flash
5 times Flash
6 times Flash
7 times Flash
Running Light State of
Short Flashes Timer Light
1 time OFF
2 times OFF
4 times OFF
5 times OFF
6 times OFF
7 times OFF
8 times OFF
1 time ON
2 times ON
3 times ON
4 times ON
5 times ON
6 times ON
1 time Flash
2 times Flash
4 times Flash
5 times Flash
7 times Flash
8 times Flash
Table 9. Indoor Unit Fault Codes (09/24)
Display Description
E0 Indoor unit EEPROM error
E1 Communication error between indoor and outdoor units
E3 Indoor fan speed error
E4 Indoor return air temperature sensor error
E5 Indoor coil temperature sensor error
EC Low refrigerant
EE High water level alarm
F0 Outdoor current overload sensed
F1 Outdoor ambient temperature sensor error
F2 Outdoor coil temperature sensor error
F3 Compressor discharge temperature sensor error
F4 Outdoor unit EEPROM error
F5 Outdoor unit fan speed error
P0 Inverter module IPM error
P1 High or low voltage protection
P3 Outdoor unit low temperature lockout
P4 Compressor drive error
-- Mode conflict
P6 Compressor high- or low-pressure switch open.
Table 10. Indoor Unit Fault Codes (09/30-48)
Display Description
E0 Indoor unit EEPROM error
E1 Communication error between indoor and outdoor units
E3 Indoor fan speed error
E4 Indoor return air temperature sensor error
E5 Indoor coil temperature sensor error
EC Low refrigerant
EE High water level alarm
F0 Outdoor current overload sensed
F1 Outdoor ambient temperature sensor error
F2 Outdoor coil temperature sensor error
F3 Compressor discharge temperature sensor error
F4 Outdoor unit EEPROM error
F5 Outdoor unit fan speed error
P0 Inverter module IPM error
P1 High or low voltage protection
P3 Outdoor unit low temperature lockout
P4 Compressor drive error
P6 Compressor high- or low-pressure switch open.
P7 Outdoor IGBT temperature sensor error
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