Daikin AC Error Code | Fault diagnosis by remote controller OUT DOOR UNIT Daikin AC Error Code H0-Malfunction Compressor’s sensor system H1-room malfunction Temperature sensor or humidifier unit dumper H2-Malfunction Power supply sensor H3-high malfunction Pressure Switch (HPS) H4-less malfunction Pressure Switch (LPS) H5-Malfunction Compressor motor overload Thermistor H6-Malfunction Position detection sensor H7-Malfunction Outdoor unit