Lennox MPA012S4S-1L Service Manual page 141

Multi-Zone outdoor units display fault codes with a digital LED display on the main board. The main board is
accessed through the top of the unit. Indoor units will display more detailed fault codes. See Section 13.4 for
troubleshooting indoor unit fault codes
DISPLAY
E0
E2
E3
E4
E5
E8
F1
F2
F3
F4
F5
F6
P1
P2
P3
P4
P5
P6
OUTDOOR UNIT ERROR CODE DEFINITION
Outdoor EEPROM error
Communication error between outdoor unit and all indoor units
Communication error between outdoor unit main control
and IPM control
Temp. sensor error (outdoor coil sensor, outdoor ambient sensor,
compressor discharge sensor, indoor unit coil outlet temp. sensor)
High or Low voltage protection
Outdoor DC fan speed error
Indoor unit #1 coil outlet temp. sensor error
Indoor unit #2 coil outlet temp. sensor error
Indoor unit #3 coil outlet temp. sensor error
Indoor unit #4 coil outlet temp. sensor error
Indoor unit #5 coil outlet temp. sensor error
Indoor unit #6 coil outlet temp. sensor error
High pressure switch open
Low pressure switch open
Outdoor Compressor current overload sensed
High temperature sensed at compressor discharge line
High temperature sensed at outdoor coil
Inverter module (IPM) error
Lennox Mini-Split Service Manual / Page 141