Ferroli · A niche brand in the UK. 63 codes across 3 product families, each taken from the manufacturer’s manuals. Ferroli 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.
63 codes
| Code | Meaning | Stops? | Homeowner check? |
|---|---|---|---|
| Ba | T4 out of operation range | Not stated | Yes |
| bH | PED PCB failure | Not stated | Yes |
| C7 | High temperature protection of inverter module heat sink | Not stated | Yes |
| CD | Compressor module fault (L1E-L- family per table) | Not stated | Yes |
| CL | Water pump communication wire fault | Not stated | Yes |
| E0 | Water flow fault (10 times E8) | Not stated | Yes |
| E1 | Power fault | Not stated | Yes |
| E2 | Communication fault between wired controller and indoor unit | Not stated | Yes |
| E3 | Hydro-box water outlet temperature sensor (T1) fault | Not stated | Yes |
| E4 | Water tank temperature sensor (T5) fault | Not stated | Yes |
| E5 | Outdoor unit heat exchanger temperature sensor (T3) fault | Not stated | Yes |
| E6 | Outdoor unit ambient temperature sensor (T4) fault | Not stated | Yes |
| E7 | Balance tank temperature sensor (Tbt) fault | Not stated | Yes |
| E8 | Water flow fault | Not stated | Yes |
| E9 | Compressor suction line temperature sensor (Th) fault | Not stated | Yes |
| EA | Compressor discharge line temperature sensor (Tp) fault | Not stated | Yes |
| Eb | Solar panel temperature sensor (Tsolar) fault | Not stated | Yes |
| EC | Water tank temperature sensor (T5_2) fault | Not stated | Yes |
| Ed | Hydro-box plate heat exchanger water inlet temperature sensor (Tw_in) fault | Not stated | Yes |
| EE | Hydraulic module EEprom failure | Not stated | Yes |
| EL | Communication fault between hydraulic module and MH-kit | Not stated | Yes |
| F1 | DC bus low voltage protection | Not stated | Yes |
| F6 | EXV fault | Not stated | Yes |
| FC1 | TL temperature sensor fault | Not stated | Yes |
| H0 | Communication fault between hydro-box and outdoor unit | Not stated | Yes |
| H1 | Communication fault between main control board and inverter module board | Not stated | Yes |
| H2 | Plate heat exchanger outlet (heat) refrigerant temperature sensor (T2) fault | Not stated | Yes |
| H3 | Plate heat exchanger inlet (heat) refrigerant temperature sensor (T2B) fault | Not stated | Yes |
| H4 | Three times L1 protections | Not stated | Yes |
| H5 | Room temperature sensor (Ta) fault | Not stated | Yes |
| H6 | DC fan motor fault | Not stated | Yes |
| H7 | AC voltage protection | Not stated | Yes |
| H8 | High pressure sensor fault | Not stated | Yes |
| H9 | Zone 2 water flow temperature sensor (Tw2) fault | Not stated | Yes |
| HA | Hydro-box plate heat exchanger water outlet temperature sensor (Tw_out) fault | Not stated | Yes |
| Hb | 3 times 'PP' protection | Not stated | Yes |
| Hd | Communication fault between master unit and slave unit | Not stated | Yes |
| HE | Communication error between main board and thermostat transfer board | Not stated | Yes |
| HF | Outdoor unit EEPROM fault | Not stated | Yes |
| HH | 10 times H6 in 120 minutes | Not stated | Yes |
| HP | Low pressure protection in cooling mode | Not stated | Yes |
| JCD | Fan module fault (J1E- family per table) | Not stated | Yes |
| L0 | Module protection (P6 group) | Not stated | Yes |
| L1 | DC generatrix low voltage protection (P6 group) | Not stated | Yes |
| L2 | DC generatrix high voltage protection (P6 group) | Not stated | Yes |
| L4 | MCE malfunction (P6 group) | Not stated | Yes |
| L5 | Zero speed protection (P6 group) | Not stated | Yes |
| L7 | Phase sequence error | Not stated | Yes |
| L8 | Speed difference > 15 Hz between the front and the back clock (P6 group) | Not stated | Yes |
| L9 | Speed difference > 15 Hz between the real and the setting speed (P6 group) | Not stated | Yes |
| P0 | Heat pump system low pressure protection | Not stated | Yes |
| P1 | Heat pump system high pressure protection | Not stated | Yes |
| P3 | AC current protection | Not stated | Yes |
| P4 | Compressor discharge temperature too high protection | Not stated | Yes |
| P5 | |Tw_out - Tw_in| value too high protection | Not stated | Yes |
| P6 | Inverter module protection group (sub-codes L0, L1, L2, L4, L5, L8, L9) | Not stated | Yes |
| P21 | Low pressure sensor fault | Not stated | Yes |
| P27 | Pressure sensor reverse insertion protection | Not stated | Yes |
| Pb | Anti-freeze mode | Partly | Yes |
| Pd | Condensing temperature too high protection | Not stated | Yes |
| PE | Water pressure sensor fault | Not stated | Yes |
| PF | Insufficient discharge superheat | Not stated | Yes |
| PP | Tw_out - Tw_in unusual protection | Not stated | Yes |