circuit or short circuit ☆ 5 times O F4 Outdoor unit EEPROM parameter error ☆ 6 times O F5 Outdoor fan speed has been out of control ☆ 1 times ☆ P0 IPM malfunction or IGBT over-strong current protection ☆ 2 times ☆ P1 Over voltage or over low voltage protection High temperature protection of compressor top ☆ 3 times ☆ P2 diagnosis and solution ☆ 5 times ☆ P4 Inverter compressor drive error O（light） X（off） ☆（flash） 8.2 Trouble shooting 9.2 Outdoor unit error display For COB01-09HFN1-MX0W,COB01-12HFN1-MV0W,COCA01-18HFN1-MT0W After power on, LED100(Blue color) will be slow flash(0.2Hz) when the unit is in standby and quick flash (2.5Hz) if the unit has some problems. LED301 LED300 No. Problems IU display (Green) (Red) 1 standby for normal O X 2 Operation normally X O 3 IPM malfunction or IGBT over-strong current protection X P0 ☆ 4 Over voltage or too low voltage protection O O P1 5 Over voltage or too low voltage protection O P1 ☆ 6 Inverter compressor drive error X P4 ☆ 7 Inverter compressor drive error O P4 ☆ 8 Inverter compressor drive error P4 ☆ ☆ O（light） X（off） flash） ☆（2.5Hz For MOB30-09HFN1-BW0W, MOB30-12HFN1-BV0W,
circuit or short circuit ☆ 5 times O F4 Outdoor unit EEPROM parameter error ☆ 6 times O F5 Outdoor fan speed has been out of control ☆ 1 times ☆ P0 IPM malfunction or IGBT over-strong current protection ☆ 2 times ☆ P1 Over voltage or over low voltage protection ☆ 3 times ☆ P2 High temperature protection of compressor top diagnosis and solution ☆ 5 times ☆ P4 Inverter compressor drive error O（light） X（off） ☆（flash） 8.2 Trouble shooting 9.2 Outdoor unit error display For COB01-09HFN1-MX0W,COB01-12HFN1-MV0W,COCA01-18HFN1-MT0W After power on, LED100(Blue color) will be slow flash(0.2Hz) when the unit is in standby and quick flash (2.5Hz) if the unit has some problems. No. Problems LED301 (Green) LED300 (Red) IU display 1 standby for normal O X 2 Operation normally X O 3 IPM malfunction or IGBT over-strong current protection ☆ X P0 4 Over voltage or too low voltage protection O O P1 5 Over voltage or too low voltage protection O ☆ P1 6 Inverter compressor drive error X ☆ P4 7 Inverter compressor drive error ☆ O P4 8 Inverter compressor drive error ☆ ☆ P4 O（light） X（off） ☆（2.5Hz flash） For MOB30-09HFN1-BW0W, MOB30-12HFN1-BV0W,