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Maintenance
4.7 Indoor unit error codes
Error code Cause
Number of
flashes per
second
Timer
indicator
E0
EEPROM (Electrically Erasable Programmable Read-Only Memory)
error of the indoor unit
1 O
E1 Communication error between an indoor unit and the outdoor unit 2 O
E3 Malfunction of the indoor unit fan speed 4 O
E4 Internal room temperature sensor error 5 O
E5 Evaporator coil temperature sensor error 6 O
EC Malfunctioning of the refrigerant leak detection system 7 O
EE Water level alarm failure 8 O
E8
Communication error between two indoor units (only in systems
with multiple indoor units)
9 O
E9 Other malfunction of the two-unit model 10 O
F0 Overload protection 1 On
F1 External temperature sensor error 2 On
F2 External condenser pipe sensor error 3 On
F3 Exhaust air temperature sensor error 4 On
F4
Outdoor unit EEPROM (Electrically Erasable Programmable
Read-Only Memory) error
5 On
F5 Malfunction of the outdoor unit fan speed 6 On
P0 IPM protection of the inverter module 1 Flashing
P1 High/low voltage protection 2 Flashing
P2 Compressor overheating protection 3 Flashing
P3 Low outside temperature protection 4 Flashing
P4 Compressor drive error 5 Flashing
P5 Mode conflict 6 Flashing
P6 Compressor low pressure protection 7 Flashing
P7 External IGBT sensor error 8 Flashing
FA Malfunction of communication with the indoor unit 11 On
88 Malfunction of communication with the indoor unit - -
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