Panasonic · A major brand in the UK. 68 codes across 2 product families, each taken from the manufacturer’s manuals. Panasonic technical support ↗
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Type the code on your display or a word from its meaning. Each code opens its own page with what it means, whether it is safe and what you can check.
68 codes
| Code | Meaning | Stops? | Homeowner check? |
|---|---|---|---|
| F12 | Pressure switch activate | Yes | Yes |
| F14 | Outdoor compressor abnormal revolution | Yes | Yes |
| F15 | Outdoor fan motor lock abnormality | Yes | Yes |
| F16 | Total running current protection | Yes | Yes |
| F20 | Outdoor compressor overheating protection | Yes | Yes |
| F22 | IPM (power transistor) overheating protection | Yes | Yes |
| F23 | Outdoor Direct Current (DC) peak detection | Yes | Yes |
| F24 | Refrigeration cycle abnormality | Yes | Yes |
| F25 | Cooling/Heating cycle changeover abnormality | Yes | Yes |
| F27 | Pressure switch abnormality | Yes | Yes |
| F29 | Low Discharge Superheat | Yes | Yes |
| F30 | Water outlet sensor 2 abnormality | Yes | Yes |
| F32 | Abnormal Internal Thermostat | Partly | Yes |
| F34 | Indoor water heat exchanger leak | Yes | Yes |
| F35 | External meter communication error | No | Yes |
| F36 | Outdoor air temperature sensor abnormality | Yes | Yes |
| F37 | Indoor water inlet temperature sensor abnormality | Yes | Yes |
| F40 | Outdoor discharge pipe temperature sensor abnormality | Yes | Yes |
| F41 | PFC control | Yes | Yes |
| F42 | Outdoor heat exchanger temperature sensor abnormality | Yes | Yes |
| F43 | Outdoor defrost sensor abnormality | Yes | Yes |
| F45 | Indoor water outlet temperature sensor abnormality | Yes | Yes |
| F46 | Outdoor Current Transformer open circuit | Yes | Yes |
| F48 | Outdoor EVA outlet temperature sensor abnormality | Yes | Yes |
| F49 | Outdoor bypass outlet temperature sensor abnormality | Yes | Yes |
| F50 | Water inlet 2 sensor error | Yes | Yes |
| F51 | Economizer outlet sensor error | Not stated | Yes |
| F52 | Bypass inlet sensor error | Not stated | Yes |
| F53 | Main expansion valve overcurrent protection | Yes | Yes |
| F54 | Bypass expansion valve overcurrent protection | Not stated | Yes |
| F55 | Not verified (M-series code; the list around F53-F56 reads "Main expansion valve overcurrent protection", "Bypass expansion valve overcurrent protection", "Electrical anode error" but one explanation could not be aligned) | Not stated | Yes |
| F56 | Not verified (M-series code; the list around F53-F56 reads "Main expansion valve overcurrent protection", "Bypass expansion valve overcurrent protection", "Electrical anode error" but one explanation could not be aligned) | Not stated | Yes |
| F95 | Cooling high pressure overload protection | Yes | Yes |
| H00 | No abnormality detected | No | Yes |
| H12 | Indoor/Outdoor capacity unmatched | Yes | Yes |
| H15 | Outdoor compressor temperature sensor abnormality | Yes | Yes |
| H17 | Zone 2 pump error | Partly | Yes |
| H20 | Water pump abnormality | Yes | Yes |
| H21 | Abnormal water pressure | Yes | Yes |
| H22 | Abnormal tank 2 sensor | Partly | Yes |
| H23 | Indoor refrigerant liquid temperature sensor abnormality | Yes | Yes |
| H27 | Service valve error | Yes | Yes |
| H28 | Abnormal solar sensor | Partly | Yes |
| H31 | Abnormal swimming pool sensor | Partly | Yes |
| H36 | Abnormal buffer tank sensor | Partly | Yes |
| H38 | Brand code not match | Yes | Yes |
| H42 | Compressor low pressure abnormality | Yes | Yes |
| H43 | Abnormal Zone 1 sensor | Partly | Yes |
| H44 | Abnormal Zone 2 sensor | Partly | Yes |
| H62 | Water flow switch abnormality | Yes | Yes |
| H63 | Abnormal low pressure sensor | Yes | Yes |
| H64 | Refrigerant high pressure abnormality | Yes | Yes |
| H65 | Deice circulation error | Yes | Yes |
| H67 | Abnormal External Thermistor 1 | Partly | Yes |
| H68 | Abnormal External Thermistor 2 | Partly | Yes |
| H70 | Back-up heater OLP abnormality | Partly | Yes |
| H72 | Tank sensor abnormal | Partly | Yes |
| H74 | PCB communication error | Partly | Yes |
| H75 | Low water temperature control | Partly | Yes |
| H76 | Indoor - control panel communication abnormality | Yes | Yes |
| H90 | Indoor/outdoor abnormal communication | Yes | Yes |
| H91 | Tank heater OLP abnormality | Partly | Yes |
| H95 | Indoor/Outdoor wrong connection | Yes | Yes |
| H98 | Outdoor high pressure overload protection | Yes | Yes |
| H99 | Indoor heat exchanger freeze prevention | Yes | Yes |
| LAN-IP-COLLISION | LAN IP address collision | No | Yes |
| STATUS-LED-RED | Status LED red - abnormality of the network adaptor | No | Yes |
| STATUS-LED-RED-BLINKING | Adaptor cannot connect to the air-to-water indoor unit | No | Yes |