Technibel S.A.S. · No longer sold new in the UK. 47 codes across 1 product family, each taken from the manufacturer’s manuals. Technibel S.A.S. technical support ↗
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47 codes
| Code | Meaning | Stops? | Homeowner check? |
|---|---|---|---|
| Cn | System communication failure between A1 and A2 boards | Yes | Yes |
| E01 | Maintenance remote control detected error signal from A2 board - serial signal receiving failure | Yes | Yes |
| E02 | Maintenance remote control / A2 serial signal sending failure | Yes | Yes |
| E03 | A2 board detected error signal from maintenance remocon - serial signal failure | Yes | Yes |
| E04 | A2 board detected error from A3 board - serial signal receiving failure | Yes | Yes |
| E05 | A2 to A3 serial signal sending failure | Yes | Yes |
| E06 | A3 board detected error from A2 board - serial signal receiving failure | Yes | Yes |
| E07 | A3 to A2 serial signal sending failure | Yes | Yes |
| E15 | Automatic address setting failure - A2 capacity/number parameters too low | Yes | Yes |
| E16 | Automatic address setting failure - A2 capacity/number parameters too high | Yes | Yes |
| E20 | Automatic address setting failure - A3 cannot receive any serial signal from A2 (A2 not detected) | Yes | Yes |
| E22 | Mis-wiring between boards or missing phase on power supply | Yes | Yes |
| E31 | Communication trouble within boards - no communication with MDC for 3 minutes or longer | Yes | Yes |
| F01 | Open/short circuit in H/E 'liquid line' temperature sensor E1/S7 | Yes | Yes |
| F02 | Abnormal pressure detected in plate exchanger by E2P/B1 pressure sensor (value out of range) | Yes | Yes |
| F04 | Open/short circuit in discharge temperature sensor TD/S5 (incl. 90 C or more 60 min after compressor stop) | Yes | Yes |
| F06 | Open/short circuit in air heat exchanger sensor C1/S2 | Yes | Yes |
| F07 | Open/short circuit in outdoor heat exchanger temperature sensor C2/S1 | Yes | Yes |
| F08 | Open/short circuit in outdoor air sensor TO/S4 | Yes | Yes |
| F10 | Open/short circuit in water inlet temperature sensor TW1/S8 | Yes | Yes |
| F12 | Open/short circuit in suction temperature sensor TS/S3 | Yes | Yes |
| F29 | EEPROM trouble on A2 board (read/write failure) | Yes | Yes |
| F31 | EEPROM trouble on A3 board (read/write failure) | Yes | Yes |
| FL | Water flow fault in heat pump (see hydraulic alarms) | Yes | Yes |
| Gr | Synthetic heat pump alarm transmitted to system control (see refrigerant/hydraulic alarms) | Yes | Yes |
| H01 | Over-current error (inverter stops) | Yes | Yes |
| HE | Electric support heater fault: heat pump circuit water pressure too low or heater safety thermostat tripped (80 C auto / 115 C manual) | Yes | Yes |
| L02 | A2 and A3 board settings incompatible (wrong spare part or parameters) | Yes | Yes |
| L08 | Settings failure - incorrect address in EEPROM of A2 board | Yes | Yes |
| L09 | Settings failure - incorrect capacity in EEPROM of A2 board | Yes | Yes |
| L10 | Settings failure - capacity not set in EEPROM of A3 board | Yes | Yes |
| L13 | Settings failure - A3 and A2 unit types judged incompatible | Yes | Yes |
| P03 | Abnormal discharge temperature: TD at or above 111 C (095-197) / 115 C (257/307); alarm after 4 consecutive pre-trips | Yes | Yes |
| P04 | High refrigerant pressure switch activated (41.5 bar) - units 257/307 only | Yes | Yes |
| P05 | Missing phase / incorrect phase order (3-ph), AC supply error or current transformer disconnected | Yes | Yes |
| P15 | Insufficient refrigerant detected (TD >=95 C, EEV at max step, low compressor current for 1 min) | Yes | Yes |
| P19 | 4-way valve trouble (water HX temperature moves the wrong way 5 min after compressor start); alarm after 2 pre-trips | Yes | Yes |
| P20 | High-pressure protection caused by high load: air H/E temperature above 64 C / 61 C | Yes | Yes |
| P22 | Fan motor trouble - fan inverter protection activated or fan motor lock detected | Yes | Yes |
| P26 | Compressor inverter protection activated - short circuit on HIC board / HIC temperature protection | Yes | Yes |
| P29 | Error in current detection circuit - AC current high even while compressor halted | Yes | Yes |
| SAE | System outdoor temperature sensor S13 open/short circuit | Not stated | Yes |
| SEin | System water inlet temperature sensor S11 open/short circuit | Yes | Yes |
| SEOu | System water outlet temperature sensor S12 open/short circuit | Yes | Yes |
| W-FAST-FLASH | Low water temperature at heat exchanger outlet (TW2 <16 C during defrost in heat mode, <4 C in cooling); manual reset after 4th event in an hour | Yes | Yes |
| W-FLICKER | Open/short circuit in water outlet temperature sensor TW2/S9 | Yes | Yes |
| W-SLOW-FLASH | Water flow fault in heat pump: no flow detected by flow switch while pump runs (>10 s stops HP; stored if >1 min or >3 times/hour) | Yes | Yes |