Hitachi Error Codes
Every Hitachi error code we have catalogued, with what it means on site — 39 codes in total. In R-Pro, tap any code to get the meaning, likely causes and inspection steps, even with no signal in the plant room.
39 codes
| Code | What it means |
|---|---|
| 01 | Indoor float switch activated |
| 02 | High pressure cut (PSH) |
| 03 | Abnormality between indoor and outdoor |
| 04 | Comm error: inverter PCB ↔ outdoor PCB |
| 05 | Supply phase error / open phase |
| 06 | Abnormal inverter / fan controller voltage |
| 07 | Decrease in discharge gas superheat |
| 08 | Increase in discharge gas temperature |
| 0A | Comm abnormality between outdoor units |
| 11 | Inlet air thermistor |
| 12 | Outlet air thermistor |
| 13 | Freeze protection thermistor |
| 14 | Gas piping thermistor |
| 15 | Liquid piping thermistor |
| 16 | Room air thermistor |
| 17 | Discharge temperature sensor fault |
| 21 | High pressure sensor |
| 22 | Outdoor air thermistor |
| 23 | Discharge gas thermistor (compressor top) |
| 29 | Low pressure sensor |
| 31 | Incorrect capacity setting |
| 38 | Abnormality of protection circuit |
| 43 | Pressure ratio decrease protection |
| 45 | High pressure increase protection |
| 47 | Vacuum protection activated |
| 48 | Outdoor DC fan motor fault |
| 51 | Inverter current sensor fault |
| 52 | Inverter over-current |
| 54 | Inverter fin temperature rise |
| 55 | Inverter failure (under-voltage) |
| P03 | Inverter current high |
| P05 | Discharge gas temp increase |
| P14 | Compressor over-current |
| E3 | Low pressure / gas shortage |
| E4 | Compressor discharge temp high |
| E5 | Over-current protection |
| E6 | Indoor/outdoor comm fault (split) |
| E9 | IPM protection triggered |
| F8 | Outdoor fan motor anomaly |
Official Hitachi source / manual ↗
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