NIBE · A major brand in the UK. 496 codes across 1 product family, each taken from the manufacturer’s manuals. NIBE technical support ↗
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496 codes
| Code | Meaning | Stops? | Homeowner check? |
|---|---|---|---|
| 1 | Sensor fault BT1: Sensor not connected/defective (outdoor temperature sensor) [other NIBE documents: No contact with outdoor temperature sensor] | Partly | Yes |
| 2 | Sensor fault BT2: Sensor not connected/defective (heating medium supply) | Partly | Yes |
| 3 | Sensor fault BT3: Sensor not connected/defective (heating medium return) [other NIBE documents: Sensor fault, incoming water sensor in F2050 (BT3) / Sensor fault, incoming water sensor in F2040 (BT3)] | Partly | Yes |
| 6 | Sensor fault BT6: Sensor not connected/defective (hot water, controlling) [other NIBE documents: No contact with hot water charging sensor] | Partly | Yes |
| 7 | Sensor fault BT7: Sensor not connected/defective (hot water top) | Not stated | Yes |
| 10 | Sensor fault BT10: Sensor not connected/defective (brine in) | Not stated | Yes |
| 11 | Sensor fault BT11: Sensor not connected/defective (brine out / condenser out per Emmy list) [other NIBE documents: Sensor input unreasonable value for more than 2 s] | Partly | Yes |
| 12 | Sensor fault BT12: Sensor not connected/defective (condenser out / condenser return) [other NIBE documents: Sensor input unreasonable value for more than 2 s / Sensor fault, outgoing water sensor in F2050 (BT12)] | Partly | Yes |
| 15 | Sensor fault BT15: Sensor fault, liquid line sensor in F2050 (BT15) [other NIBE documents: Sensor fault, liquid pipe sensor in F2040 (BT15)] | Not stated | Yes |
| 16 | Sensor fault BT16: Sensor not connected/defective (evaporator) | Not stated | Yes |
| 20 | Sensor fault BT20 / AZ1-BT20: Sensor not connected/defective (exhaust air) [other NIBE documents: Sensor not connected/defective (ventilation, ERS)] | Partly | Yes |
| 21 | Sensor fault BT21 / AZ1-BT21: Sensor not connected/defective (extract air) [other NIBE documents: Sensor not connected/defective (ventilation, ERS)] | Partly | Yes |
| 22 | Sensor fault DEW-BT6: Sensor not connected/defective (hot water sensor in extra water heater, DEW accessory) | Not stated | Yes |
| 23 | Sen flt: AZ30-BT22 sp air sen: Supply air sensor in ERS not connected/defective | Not stated | Yes |
| 25 | Sensor fault BT25: Sensor not connected/defective (external heating medium supply) [other NIBE documents: No contact with external heating medium supply sensor] | Partly | Yes |
| 26 | Sensor fault AZ1-BT26: Sensor not connected/defective (brine, collector in) | Partly | Yes |
| 27 | Sensor fault BP8: Sensor not connected/defective (low pressure sensor) | Partly | Yes |
| 28 | Sensor fault BT71: Sensor not connected/defective (external heating medium return) [other NIBE documents: No contact with return line sensor] | Partly | Yes |
| 29 | Sensor fault BT29: Sensor not connected/defective (compressor oil temperature) [other NIBE documents: Sensor input unreasonable value for more than 2 s] | Partly | Yes |
| 31 | Sensor fault BT63: Sensor not connected/defective (heating medium supply after immersion heater) [other NIBE documents: No contact with external supply line sensor after heater] | Partly | Yes |
| 32 | Sensor fault BS1: Air flow is outside the range of the air velocity sensor | Partly | Yes |
| 33 | Sensor fault EP30-BT53: Sensor not connected/defective (solar collectors) [other NIBE documents: Solar panel sensor not connected/defective] | Partly | Yes |
| 34 | Sensor fault EP30-BT54: Sensor not connected/defective (solar tank/coil) [other NIBE documents: Solar coil sensor not connected/defective] | Partly | Yes |
| 35 | Sensor fault EM1-BT52: Sensor not connected/defective (boiler temperature) [other NIBE documents: No contact with boiler sensor] | Partly | Yes |
| 36 | Sensor fault EP21-BT2: Sensor not connected/defective (supply sensor, heating system 2) [other NIBE documents: Supply sensor extra climate system 1 not connected/defective] | Not stated | Yes |
| 37 | Sensor fault EP22-BT2: Sensor not connected/defective (supply sensor, heating system 3) [other NIBE documents: Supply sensor extra climate system 2 not connected/defective] | Not stated | Yes |
| 38 | Sensor fault EP23-BT2: Sensor not connected/defective (supply sensor, heating system 4) [other NIBE documents: Supply sensor extra climate system 3 not connected/defective] | Not stated | Yes |
| 39 | Sensor fault EQ1-BT64: Sensor not connected/defective (brine/cooling supply) [other NIBE documents: No contact with cooling supply line sensor] | Partly | Yes |
| 40 | Compressor phase 1 missing: Compressor phase missing or below 160 V for more than 30 min | Partly | Yes |
| 41 | Compressor phase 2 missing: Compressor phase missing or below 160 V for more than 30 min | Partly | Yes |
| 42 | Compressor phase 3 missing: Compressor phase missing or below 160 V for more than 30 min | Partly | Yes |
| 43 | Faulty phase sequence: Phases connected in wrong sequence | Partly | Yes |
| 44 | Overheated softstart: Fuses for the soft start card are defective | Partly | Yes |
| 45 | Phase fault: Motor protection on single phase (Norway) has probably been triggered | Partly | Yes |
| 48 | Sens flt room sens cool oper: No contact with cooling room sensor | Partly | Yes |
| 50 | High pressure alarm: The high pressure switch has triggered repeatedly [other NIBE documents: High pressure switch deployed 2 times within 150 min or deployed 300 min continuously] | Partly | Yes |
| 51 | Low pressure alarm: Low pressure switch deployed (blocked 1 min at each mode switch) | Partly | Yes |
| 52 | The temperature limiter has tripped: Temperature limiter has tripped [other NIBE documents: Temperature limiter deployed and open for more than 30 s] | Partly | Yes |
| 53 | Level monitor brine: Brine level monitor/pressure switch has tripped (accessory) | Partly | Yes |
| 54 | Motor protection alarm: The motor protection breaker has triggered | Partly | Yes |
| 55 | Hot gas alarm: Compressor stopped because the hot gas temperature exceeded its limits [other NIBE documents: Three hot gas stops within 240 minutes] | Partly | Yes |
| 56 | Incorrect serial number: Serial number does not exist [other NIBE documents: The heat pump has a serial number that does not exist / The heat pump has an incorrect serial number] | Partly | Yes |
| 57 | Incorrect firmware: Serial number and firmware do not match [other NIBE documents: Heat pump program and serial numbers do not match] | Partly | Yes |
| 58 | Pressure switch: High or low pressure switch has triggered [other NIBE documents: High or low pressure switch has tripped] | Partly | Yes |
| 59 | Incompatible setting: Additional heat before QN10 without hot water being selected | No | Yes |
| 60 | Low HTF out: Outgoing brine temperature below set minimum and alarm selected as permanent [other NIBE documents: Outgoing brine below set minimum and alarm set permanent] | Partly | Yes |
| 63 | Low air flow: Too low air flow at air flow sensor BS1 | Partly | Yes |
| 64 | Low exhaust air temperature: Exhaust air temperature below 16 C and not above 17 C within 60 minutes | Partly | Yes |
| 65 | High condensation water level: Alarm from external level monitor | Partly | Yes |
| 66 | High condensation water level: Alarm from level monitor in condensation water container | Partly | Yes |
| 67 | Antifreeze protection supply air: Supply air temperature (BT22) below 5 C | Partly | Yes |
| 69 | Non-calibrated air flow sensor: The air flow sensor has not been calibrated | Not stated | Yes |
| 70 | Perm. com. error input card: No communication with the input card [other NIBE documents: Communication with input board (AA3) missing] | Partly | Yes |
| 71 | Perm. com. error base card: No communication with the base card (AA2 at AA26) [other NIBE documents: Communication with base PCB (AA2) missing] | Partly | Yes |
| 72 | Perm. com. error softstart card: No communication with the softstart card | Partly | Yes |
| 73 | Perm. com. error heating system 2: No communication with the accessory card [other NIBE documents: Communication with the accessory board missing] | Partly | Yes |
| 74 | Perm. com. error heating system 3: No communication with the accessory card [other NIBE documents: Communication with the accessory board missing] | Partly | Yes |
| 75 | Perm. com. error base card: No communication with the base card (AA26) [other NIBE documents: Communication with the accessory board missing] | Partly | Yes |
| 76 | Perm. com. error heating system 4: No communication with the accessory card [other NIBE documents: Communication with the accessory board missing] | Partly | Yes |
| 77 | Perm. com. error additive with shunt: No communication with the accessory card [other NIBE documents: Communication with the accessory board missing] | Partly | Yes |
| 78 | Perm. com. error pool: No communication with the accessory card [other NIBE documents: Communication with the accessory board missing] | Partly | Yes |
| 79 | Perm. com. error FLM: Permanent communication fault with the FLM accessory card (cables, communication circuits or DIP-switch address) [other NIBE documents: Communication with the accessory board missing] | Partly | Yes |
| 80 | Com.err. PCA Accessory (listed as range 73-91): Communication with the accessory board missing | Partly | Yes |
| 81 | Com.err. PCA Accessory (listed as range 73-91): Communication with the accessory board missing | Partly | Yes |
| 82 | Com.err. PCA Accessory (listed as range 73-91): Communication with the accessory board missing | Partly | Yes |
| 83 | Unsuccessful defrosting: F750: defrost stop conditions not met for 3 hours. F110: three defrosts within 60 minutes [other NIBE documents: Communication with the accessory board missing] | Partly | Yes |
| 84 | Com.err. PCA Accessory (listed as range 73-91): Communication with the accessory board missing | Partly | Yes |
| 85 | Com.err. PCA Accessory (listed as range 73-91): Communication with the accessory board missing | Partly | Yes |
| 86 | Perm. com. error SAM 40: No communication with the SAM 40 accessory card activated in menu 5.2 [other NIBE documents: Communication with the accessory board missing] | Partly | Yes |
| 87 | Perm. com. error step controlled additive: Permanent communication fault with accessory card for step-controlled addition [other NIBE documents: Communication with the accessory board missing] | Partly | Yes |
| 88 | Perm. com. error Solar: Permanent communication fault with solar accessory card [other NIBE documents: Communication with the accessory board missing] | Partly | Yes |
| 89 | Perm. com. error HPAC: Permanent communication fault with HPAC accessory card [other NIBE documents: Communication with the accessory board missing] | Partly | Yes |
| 90 | Perm. com. fault groundwater pump: Permanent communication fault with groundwater pump accessory card [other NIBE documents: Communication with the accessory board missing] | Partly | Yes |
| 91 | Perm. com. error HWC: Permanent communication fault with hot water circulation accessory card [other NIBE documents: Communication with the accessory board missing] | Partly | Yes |
| 92 | Perm. com. error DEW: Permanent communication fault with DEW accessory card | Partly | Yes |
| 93 | Perm. com. error 2-pipes cooling: Permanent communication fault with 2-pipe cooling accessory card | Partly | Yes |
| 94 | Perm. com. error PCD4: Permanent communication fault with 4-pipe passive cooling accessory card | Partly | Yes |
| 95 | Perm. com. error FJVM: Permanent communication fault with FJVM | Partly | Yes |
| 96 | Perm. com. room unit, zone 1: Permanent communication fault with room unit zone 1 [other NIBE documents: Communication with the room unit missing] | Partly | Yes |
| 97 | Perm. com. room unit, zone 2: Permanent communication fault with room unit zone 2 [other NIBE documents: Communication with the room unit missing] | Partly | Yes |
| 98 | Perm. com. room unit, zone 3: Permanent communication fault with room unit zone 3 [other NIBE documents: Communication with the room unit missing] | Partly | Yes |
| 99 | Perm. com. room unit, zone 4: Permanent communication fault with room unit zone 4 [other NIBE documents: Communication with the room unit missing] | Partly | Yes |
| 100 | Perm. com. error inverter: Permanent communication fault with the inverter [other NIBE documents: Communication with inverter missing for 15 s] | Partly | Yes |
| 101 | Sensor fault BT1: Sensor temporarily missing (information alarm) | Not stated | Yes |
| 102 | Sensor fault BT2: Sensor temporarily missing (information alarm) | Partly | Yes |
| 103 | Sensor fault BT3: Sensor temporarily missing (information alarm) | Partly | Yes |
| 104 | Sensor fault BT4: Sensor temporarily missing (information alarm) | Not stated | Yes |
| 105 | Sensor fault BT5: Sensor temporarily missing (information alarm) | Not stated | Yes |
| 106 | Sensor fault BT6: Sensor temporarily missing (information alarm) | Not stated | Yes |
| 107 | Sensor fault BT7: Sensor temporarily missing (information alarm) [other NIBE documents: Sensor input unreasonable value for longer than 2 s] | Partly | Yes |
| 108 | Sensor fault BT8: Sensor temporarily missing (information alarm) | Partly | Yes |
| 109 | Sensor fault BT9: Sensor temporarily missing (information alarm) | Partly | Yes |
| 110 | Sensor fault BT10: Sensor temporarily missing (information alarm) | Not stated | Yes |
| 111 | Sensor fault BT11: Sensor temporarily missing (information alarm) | Not stated | Yes |
| 112 | Sensor fault BT12: Sensor temporarily missing (information alarm) | Not stated | Yes |
| 113 | Sensor fault BT13: Sensor temporarily missing (information alarm) | Partly | Yes |
| 114 | Sensor fault BT14: Sensor temporarily missing (information alarm) | Partly | Yes |
| 115 | Sensor fault BT15: Sensor temporarily missing (information alarm) | Partly | Yes |
| 116 | Sensor fault BT16: Sensor temporarily missing (information alarm) | Partly | Yes |
| 117 | Sensor fault BT17: Sensor temporarily missing (information alarm) | Partly | Yes |
| 118 | Sensor fault BT18: Sensor temporarily missing (information alarm) | Partly | Yes |
| 119 | Sensor fault BT19: Sensor temporarily missing (information alarm) | Not stated | Yes |
| 120 | Sensor fault BT20: Sensor temporarily missing (information alarm) | Not stated | Yes |
| 122 | Sensor fault BT63: Sensor not connected/defective (heating medium supply after immersion heater) | Not stated | Yes |
| 123 | Sensor fault BS1: Air flow outside range of air velocity sensor | Partly | Yes |
| 124 | Sensor fault EP30-BT53: Sensor not connected/defective (solar collectors) | Partly | Yes |
| 125 | Sensor fault EP30-BT54: Sensor not connected/defective (solar) | Partly | Yes |
| 126 | Sensor fault EM1-BT52: Sensor not connected/defective (boiler temperature) | Partly | Yes |
| 127 | Sensor fault EQ1-BT64: Sensor not connected/defective (brine/cooling supply) | Partly | Yes |
| 130 | Com.flt PCA Accessory (climate systems 5-8) (listed as range 130-135): Communication with accessory board for climate systems 5-8 missing for 15 s | Partly | Yes |
| 131 | Com.flt PCA Accessory (climate systems 5-8) (listed as range 130-135): Communication with accessory board for climate systems 5-8 missing for 15 s | Partly | Yes |
| 132 | Com.flt PCA Accessory (climate systems 5-8) (listed as range 130-135): Communication with accessory board for climate systems 5-8 missing for 15 s | Partly | Yes |
| 133 | Com.flt PCA Accessory (climate systems 5-8) (listed as range 130-135): Communication with accessory board for climate systems 5-8 missing for 15 s | Partly | Yes |
| 134 | Com.flt PCA Accessory (climate systems 5-8) (listed as range 130-135): Communication with accessory board for climate systems 5-8 missing for 15 s | Partly | Yes |
| 135 | Com.flt PCA Accessory (climate systems 5-8) (listed as range 130-135): Communication with accessory board for climate systems 5-8 missing for 15 s | Partly | Yes |
| 136 | Sensor fault AZ2-BT21: Sensor not connected/defective (extract air, FLM 2) | Partly | Yes |
| 140 | Compressor phase 1 missing: Compressor phase 1 has been briefly missing | Partly | Yes |
| 141 | Compressor phase 2 missing: Compressor phase 2 has been briefly missing | Partly | Yes |
| 142 | Compressor phase 3 missing: Compressor phase 3 has been briefly missing | Partly | Yes |
| 144 | Sensor fault QZ1-BT70: Sensor not connected/defective (hot water flow) | Partly | Yes |
| 145 | Temporary general phase fault: Temporary problem with communication from the base card to the motor protection | Partly | Yes |
| 146 | ERS accessory blocked by lev. monitor (listed as range 146-149): Level monitor for ERS 1-4 has tripped (input closed) | Partly | Yes |
| 147 | ERS accessory blocked by lev. monitor (listed as range 146-149): Level monitor for ERS 1-4 has tripped (input closed) | Partly | Yes |
| 148 | ERS accessory blocked by lev. monitor (listed as range 146-149): Level monitor for ERS 1-4 has tripped (input closed) | Partly | Yes |
| 149 | ERS accessory blocked by lev. monitor (listed as range 146-149): Level monitor for ERS 1-4 has tripped (input closed) | Partly | Yes |
| 150 | High condenser out / temporary HP alarm: Condenser out has reached max permitted temperature (VVM 310 service manual: temporary HP alarm, see alarm 50) | Varies by model | Yes |
| 151 | Sen flt: CL11-BT51 pool temp sensor: Sensor input unreasonable value for longer than 5 s | Partly | Yes |
| 152 | Sen flt: CL12-BT51 pool temperature sensor: Sensor input unreasonable value for longer than 5 s | Partly | Yes |
| 155 | Hot gas alarm (temporary): Hot gas (BT14) temporarily above 135 C | Partly | Yes |
| 156 | Low lp cool: 5 repeated alarms for low low-pressure within 4 hours [other NIBE documents: Low pressure alarm 5 times within 4 hours] | Partly | Yes |
| 157 | Low lp cool: Low pressure transmitter in outdoor unit showing too low a value [other NIBE documents: Low pressure alarm (information)] | Partly | Yes |
| 158 | Low defrost temperature: Temperature at defrost sensor (BT76) below -25 C | Partly | Yes |
| 159 | High evaporator temperature: Evaporator temperature (BT16) has exceeded 50 C | Partly | Yes |
| 160 | Low HTF out: Brine out has reached set min temperature [other NIBE documents: BT11 below minimum value of brine out] | Varies by model | Yes |
| 161 | High HTF in: Brine in has reached set max temperature | Varies by model | Yes |
| 162 | High condenser out: Condenser out has reached max permitted temperature [other NIBE documents: BT12 has exceeded 59 C; reset when below 59 C and BT3 dropped 2 K / High condenser out temperature] | Partly | Yes |
| 163 | High condenser in: Condenser in exceeds max temperature [other NIBE documents: Condenser in has reached max permitted temperature / Return temperature BT3 has exceeded 58 C; reset when dropped to 56 C] | Partly | Yes |
| 164 | Low exhaust air temperature: See alarm 64 (exhaust air below 16 C) | Varies by model | Yes |
| 165 | Low pressure, climate system: Low pressure in the climate system | Varies by model | Yes |
| 166 | Electrical anode incorrect: Fault in the electrical anode [other NIBE documents: Electrical anode fault] | Partly | Yes |
| 167 | Temperature limiter: Temperature limiter has triggered | Partly | Yes |
| 168 | Level switch: Brine level switch / pressure switch triggered | Partly | Yes |
| 169 | Motor protection breaker: Motor protection breaker has triggered | Partly | Yes |
| 170 | Com. error input card: Communication with the input card temporarily missing [other NIBE documents: Communication fault to input board AA3] | Varies by model | Yes |
| 171 | Com. error base card: Communication with the base card temporarily missing [other NIBE documents: Temporary communication fault to PCB AA2] | Partly | Yes |
| 172 | Com. error softstart card: Communication with the softstart card temporarily missing | Partly | Yes |
| 173 | Com. error heating system 2: Communication with accessory card for climate system 2 temporarily missing [other NIBE documents: Communication fault to accessory board] | Partly | Yes |
| 174 | Com. error heating system 3: Communication with accessory card for climate system 3 temporarily missing [other NIBE documents: Communication fault to accessory board] | Partly | Yes |
| 175 | Start-up of softstart card: The softstart card is starting up (approx. 20 s) [other NIBE documents: Communication fault to accessory board] | Partly | Yes |
| 176 | Com. error heating system 4: Communication with accessory card for climate system 4 temporarily missing [other NIBE documents: Communication fault to accessory board] | Partly | Yes |
| 177 | Com. error addition with mixing valve: Communication with accessory card for shunt-controlled additional heat temporarily missing [other NIBE documents: Communication fault to accessory board] | Partly | Yes |
| 178 | Com. error pool: Communication with pool accessory card temporarily missing [other NIBE documents: Communication fault to accessory board / 3 communication errors in succession on the pool accessory card] | Partly | Yes |
| 179 | Com. error FLM: Communication with FLM accessory temporarily missing | Partly | Yes |
| 180 | Freeze protection: Freeze protection active: outdoor temperature below 3 C and no heating permitted [other NIBE documents: Frost protection active: outdoor below 3 C, no heating permitted, supply temperature below calculated] | No | Yes |
| 181 | Failed periodic increase: Periodic hot water increase did not reach stop temperature within 5 hours [other NIBE documents: Periodic hot water increase did not reach stop temperature in 5 hours] | No | Yes |
| 182 | Load monitor activated: One or more power steps cannot be activated because current in at least one phase is too high [other NIBE documents: Measured power consumption for at least one phase exceeds fuse size set in menu 5.1.12] | Varies by model | Yes |
| 183 | Defrosting: Defrosting in progress [other NIBE documents: The heat pump is defrosting (status alarm) / Not an alarm but an operating status] | Partly | Yes |
| 184 | Filter alarm: Air filter needs cleaning (filter reminder interval expired) [other NIBE documents: Time set in menu 5.3.12 has expired / Reminder to check filter; months set in menu 5.1.99 elapsed] | Varies by model | Yes |
| 185 | Anti-freeze supply air: Supply air temperature (BT22) or return from heating battery (BT69) below 5 C | Partly | Yes |
| 186 | Perm. com. error additive with shunt: No communication with accessory card | Partly | Yes |
| 187 | Com. error step controlled additional heat: Temporary communication fault with step-controlled additional heat accessory card [other NIBE documents: Communication fault] | Partly | Yes |
| 188 | Com. fault solar: Temporary communication fault with solar accessory card [other NIBE documents: Communication fault] | Partly | Yes |
| 189 | Com. error HPAC: Temporary communication fault with HPAC accessory card | Not stated | Yes |
| 190 | Com. error ground water pump: Temporary communication fault with groundwater pump accessory card | Not stated | Yes |
| 191 | Com. error HWC: Temporary communication fault with hot water circulation accessory card [other NIBE documents: Communication fault] | Partly | Yes |
| 192 | Com. error 2 pipe cooling: Temporary communication fault with 2-pipe cooling accessory card | Partly | Yes |
| 193 | Com. error DEW: Temporary communication fault with DEW accessory card [other NIBE documents: Communication fault to EME 20 three times in a row] | Partly | Yes |
| 194 | Com. error PCD4: Temporary communication fault with 4-pipe cooling accessory card | Partly | Yes |
| 195 | Com. error FJVM: Temporary communication fault with FJVM | Partly | Yes |
| 196 | Com. room unit zone 1: Temporary communication fault with room unit zone 1 | Partly | Yes |
| 197 | Com. room unit zone 2: Temporary communication fault with room unit zone 2 | Not stated | Yes |
| 198 | Com. room unit zone 3: Temporary communication fault with room unit zone 3 | Partly | Yes |
| 199 | Com. room unit zone 4: Temporary communication fault with room unit zone 4 | Partly | Yes |
| 200 | Com. error inverter: Temporary communication fault with the inverter | Not stated | Yes |
| 201 | Inverter alarm: Inverter indicates alarm (see alarm log menu 3.4 for inverter code) | Partly | Yes |
| 202 | Inverter fault: Inverter indicates error (see alarm log menu 3.4 for inverter code) | Partly | Yes |
| 203 | Inverter error type I: Permanent inverter fault type I | Partly | Yes |
| 204 | Inverter error type II: Permanent inverter fault type II | Partly | Yes |
| 205 | Inverter error type III: Permanent inverter fault type III | Partly | Yes |
| 206 | Perm. com. error HW-comfort: No communication with hot water comfort accessory card for 15 s [other NIBE documents: Communication with HW comfort accessory board missing for 15 s] | Partly | Yes |
| 207 | Com. error HW-comfort: No communication with the hot water comfort accessory | Partly | Yes |
| 208 | Com. error Acc-EB1: No communication with accessory card for external additional heat for 15 s [other NIBE documents: Communication with accessory board for external additional heat missing for 15 s] | Partly | Yes |
| 209 | Com. error ACC-EPxx: 3 communication faults in a row with the accessory card [other NIBE documents: Communication fault] | Partly | Yes |
| 211 | Cpr not running: Compressor has not been running for 36 hours despite a need | Not stated | Yes |
| 212 | Cmpr has not been running for 1 week: Compressor has not been in operation for one week | Partly | Yes |
| 213 | Inverter error type I (temporary): Temporary inverter fault type I | Partly | Yes |
| 214 | Inverter error type II (temporary): Temporary inverter fault type II | Partly | Yes |
| 215 | Inverter error type III (temporary): Temporary inverter fault type III | Partly | Yes |
| 216 | Inverter alarm type II - incorrect inverter: Incorrect inverter | Partly | Yes |
| 217 | The fuse in the heat pump has tripped: The inverter's fuse has tripped | Partly | Yes |
| 218 | The compressor's rotor is blocked: Compressor rotor blocked [other NIBE documents: The rotor is locked] | Partly | Yes |
| 219 | Failed periodic increase: Periodic increase did not reach stop temperature within 5 hours | Not stated | Yes |
| 220 | High pressure alarm: Heat pump (outdoor unit) sends high pressure fault message to the controller [other NIBE documents: High pressure switch (63H1) deployed 5 times within 60 min or continuously for 60 min / High pressure switch BP1 (63H1) has tripped 5 times within 60 minutes] | Partly | Yes |
| 221 | Low pressure alarm: Heat pump (outdoor unit) sends low pressure fault message to the controller [other NIBE documents: Too low value on low pressure sensor 3 times within 60 min / Low-pressure sensor BP8 (PSL) detects abnormally low pressure] | Partly | Yes |
| 222 | Motor protection alarm: Heat pump (outdoor unit) sends motor protection fault message to the controller [other NIBE documents: Alarm 7 from outdoor unit] | Partly | Yes |
| 223 | Communication alarm (outdoor unit): Heat pump (outdoor unit) sends communication fault message to the controller [other NIBE documents: Communication between control board and communication board interrupted (22 VDC required at CNW2 on PWB1) / Communication between control board and communication board interrupted (22 VDC at CNW2 on PWB1)] | Partly | Yes |
| 224 | Fan alarm: Heat pump (outdoor unit) sends fan fault message to the controller [other NIBE documents: Deviations in fan speed in the outdoor unit / Deviations in the fan speed in F2120] | Partly | Yes |
| 225 | Flow/return: Heat pump (outdoor unit) sends flow/return fault message (return hotter than flow) [other NIBE documents: Return is hotter than supply / The return is higher than the supply temperature] | Partly | Yes |
| 226 | Stove monitor activated: Stove monitor activated | Varies by model | Yes |
| 227 | Sensor fault (outdoor unit): Heat pump (outdoor unit) sends sensor fault message to the controller [other NIBE documents: Outdoor unit sensor not connected/defective / Sensor fault BT3/BT12/BT14/BT15/BT16/BT17/BT28/BT81/BP8/BP9/BP11/BT84 (outdoor codes 34,36,38,40,42,44,46,48,50,52,54,56)] | Partly | Yes |
| 228 | Defrost fault: Heat pump (outdoor unit) sends defrost fault message to the controller [other NIBE documents: 10 failed consecutive defrostings / Defrosting could not be completed 10 times in a row] | Partly | Yes |
| 229 | Short operation times for compressor: Compressor has stopped three times in a row shortly after start [other NIBE documents: Operation stopped from indoor section after less than 5 minutes / Compressor operation shorter than 5 minutes 3 times in a row] | Partly | Yes |
| 230 | Hot gas alarm: Heat pump (outdoor unit) sends hot gas fault message to the controller [other NIBE documents: Temperature deviations on discharge sensor (F2120: 3 times within 4 h; F2040/AMS: 2 times within 60 min or continuous 60 min) / High hot gas alarm 3 times in a row within 4 hours] | Partly | Yes |
| 231 | Phase sequence error: Heat pump (outdoor unit) sends phase fault message to the controller [other NIBE documents: Alarm 18 from outdoor unit] | Partly | Yes |
| 232 | Low evaporation: Heat pump (outdoor unit) sends low evaporation fault message to the controller [other NIBE documents: 5 repeated alarms for low evaporation temperature within 4 hours / Low evaporation temperature 5 times in 4 hours] | Partly | Yes |
| 233 | Fan alarm in outd air heat pump: 5 unsuccessful start attempts [other NIBE documents: No feedback signal from the fan 5 times within 240 minutes / Deviations in the fan speed in F2050] | Partly | Yes |
| 234 | Flow fault: Return is hotter than flow [other NIBE documents: Heat pump (selected outdoor unit) sends fault message to controller] | Partly | Yes |
| 235 | Sensor fault from heat pump: Sensor fault BT3/BT12/BT14/BT15/BT16/BT17/BT28/BT81/BP8/BP9/BP11/BT84 [other NIBE documents: Heat pump (selected outdoor unit) sends fault message to controller] | Partly | Yes |
| 236 | Sensor fault AZ2-BT20: Sensor not connected/defective (exhaust air, FLM 2) | Partly | Yes |
| 237 | Sensor fault AZ2-BT21: Sensor not connected/defective (extract air, FLM 2) | Partly | Yes |
| 238 | Sensor fault AZ2-BT26: Sensor not connected/defective (brine collector in, FLM 2) | Partly | Yes |
| 239 | Sensor fault AZ3-BT20: Sensor not connected/defective (exhaust air, FLM 3) | Partly | Yes |
| 240 | Sensor fault AZ3-BT21: Sensor not connected/defective (extract air, FLM 3) | Partly | Yes |
| 241 | Sensor fault AZ3-BT26: Sensor not connected/defective (brine collector in, FLM 3) | Partly | Yes |
| 242 | Sensor fault AZ4-BT20: Sensor not connected/defective (exhaust air, FLM 4) | Partly | Yes |
| 243 | Sensor fault AZ4-BT21: Sensor not connected/defective (extract air, FLM 4) | Partly | Yes |
| 244 | Sensor fault AZ4-BT26: Sensor not connected/defective (brine collector in, FLM 4) | Partly | Yes |
| 245 | Com. error FLM 2: Temporarily no communication with FLM 2 accessory | Partly | Yes |
| 246 | Com. error slave: Temporarily no communication with slave heat pump | Partly | Yes |
| 247 | Com. error FLM 4: Temporarily no communication with FLM 4 accessory | Partly | Yes |
| 248 | Communication fault (display - base card): No connection between the display unit and the base card | Partly | Yes |
| 249 | Com. error ACS45: Temporarily no communication with accessory card | Partly | Yes |
| 250 | Com. error ACC-SMS 40: Temporarily no communication with SMS 40 accessory card [other NIBE documents: Communication with SMS 40 accessory missing for 15 s] | Partly | Yes |
| 251 | Com. error ACC Modbus 40: Temporarily no communication with MODBUS 40 accessory card [other NIBE documents: Communication with MODBUS accessory missing for 15 s] | Partly | Yes |
| 252 | Com. error slave: Temporarily no communication with slave heat pump | Partly | Yes |
| 253 | Sensor fault QZ1-BT70: Sensor not connected/defective (hot water flow, hot water comfort) | Partly | Yes |
| 254 | Communication error: Communication fault with accessory board | Partly | Yes |
| 255 | Motor protection alarm, brine pump: Motor protection on the brine pump triggered | Partly | Yes |
| 256 | Not enough refrigerant: Not enough refrigerant detected on start-up in cooling mode [other NIBE documents: Low refrigerant amount] | Partly | Yes |
| 257 | Com. error ACS45: Temporarily no communication with ACS 45 accessory card | Partly | Yes |
| 258 | Sensor fault EQ1-BT57: Sensor not connected/defective (cooling brine) | Partly | Yes |
| 259 | Sensor fault EQ1-BT75: Sensor not connected/defective (cooling flow heat pump) | Partly | Yes |
| 260 | Cold outd air, heat. mode: Outside temperature too low to ensure safe operation [other NIBE documents: Temperature of BT28 below the value that permits operation / EB101 sends message to controller] | Partly | Yes |
| 261 | High heat exchanger temperature (generated by heat pump): Temperature deviation on the heat exchanger sensor (Tho-R1/R2) five times within 60 minutes or continuously for 60 minutes [other NIBE documents: Temperature deviation on heat exchanger sensor (Tho-R1/R2) 5 times within 60 min or continuously 60 min / High pressure and/or temperature in the evaporator] | Partly | Yes |
| 262 | Power transistor overheated (generated by heat pump): Overheated power transistor [other NIBE documents: IPM shows FO fault output signal 5 times in 60 minutes / Protection against damage if current too high] | Partly | Yes |
| 263 | Inverter error - incorrect voltage (generated by heat pump): Incorrect voltage out from the inverter [other NIBE documents: Voltage from the inverter outside parameters 4 times within 30 minutes / Abnormally high current detected by the inverter] | Partly | Yes |
| 264 | Communication error with inverter (generated by heat pump): Communication between inverter circuit board and control card interrupted [other NIBE documents: Communication between inverter board and control board/PCB interrupted / Communication between inverter circuit board and control board broken] | Partly | Yes |
| 265 | Inverter error - power transistor (generated by heat pump): Continuous error on power transistor for 15 minutes [other NIBE documents: Continuous deviation on power transistor for 15 minutes / The power transistor emits a fault signal] | Partly | Yes |
| 266 | Low refrigerant amount (generated by heat pump): Low refrigerant amount detected [other NIBE documents: Insufficient refrigerant detected at start-up in cooling operation (BT15 must drop 4 K vs BT3 within 1 min) / Not enough refrigerant detected on start-up in cooling mode] | Partly | Yes |
| 267 | Inverter fault - boot/start failure (generated by heat pump): Inverter fault, boot/start failure of compressor [other NIBE documents: Failed start for compressor / The compressor failed to start] | Partly | Yes |
| 268 | Overcurrent, inverter A/F module (generated by heat pump): Overcurrent in inverter A/F module [other NIBE documents: Overcurrent, inverter A/F module / Overcurrent in the inverter] | Partly | Yes |
| 269 | Non-compatible outd air heat pump: Heat pump and indoor module are incompatible [other NIBE documents: Heat pump and indoor module do not function together due to technical parameters / Outdoor unit connected is not compatible, or DIP switch settings faulty] | Partly | Yes |
| 270 | Compressor preheating: Preheating of the compressor is active [other NIBE documents: Preheating of compressor in progress] | Partly | Yes |
| 271 | Cold outdoor air: Outdoor unit (EB101) reports outdoor temperature below its working range [other NIBE documents: Outdoor temperature outside outdoor unit's working range / Outdoor temperature outside operating range] | Partly | Yes |
| 272 | Hot outdoor air: Outdoor unit (EB101) reports outdoor temperature above its working range [other NIBE documents: Outdoor temperature outside outdoor unit's working range / Outdoor temperature outside operating range] | Partly | Yes |
| 273 | HW-start and HW-stop reset to factory settings: Hot water settings adjusted because of short operating times [other NIBE documents: Set hot water levels cannot be reached] | Partly | Yes |
| 274 | Compressor phase overloaded: Load monitor has prevented the compressor operating at desired power [other NIBE documents: Load monitor prevents compressor running at desired power] | Varies by model | Yes |
| 275 | Compressor phase overloaded long time: Load monitor has prevented the compressor operating at desired power for a long time [other NIBE documents: Load monitor prevents compressor running at desired power] | Varies by model | Yes |
| 276 | Com. error slave 6: Temporarily no communication with slave heat pump (EB106) | Partly | Yes |
| 277 | Sensor fault Tho-R heat exchanger (generated by heat pump): Sensor fault, outdoor unit heat exchanger/evaporator sensor (MHI Tho-R) [other NIBE documents: Evaporator sensor Tho-R unreasonable value 3 times within 40 min / Repeated sensor disconnection, evaporator sensor BT16] | Partly | Yes |
| 278 | Sensor fault Tho-A ambient air (generated by heat pump): Sensor fault, outdoor unit ambient air sensor (MHI Tho-A) [other NIBE documents: Outdoor sensor Tho-A unreasonable value 3 times within 40 min / Repeated sensor disconnection, ambient sensor BT28] | Partly | Yes |
| 279 | Sensor fault Tho-D discharge (generated by heat pump): Sensor fault, outdoor unit discharge/hot gas sensor (MHI Tho-D) [other NIBE documents: Discharge sensor Tho-D unreasonable value 3 times within 40 min / Repeated sensor disconnection, discharge sensor BT14] | Partly | Yes |
| 280 | Sensor fault Tho-S suction (generated by heat pump): Sensor fault, outdoor unit suction gas sensor (MHI Tho-S) [other NIBE documents: Suction gas sensor Tho-S unreasonable value 3 times within 40 min / Repeated sensor failures, suction gas sensor BT17] | Partly | Yes |
| 281 | Sensor fault LPT low pressure (generated by heat pump): Sensor fault, outdoor unit low pressure transmitter [other NIBE documents: Low pressure sensor LPT unreasonable value 3 times within 40 min / Repeated sensor failures, low-pressure sensor BP8 (PSL) / high-pressure sensor BP4 (PSH)] | Partly | Yes |
| 282 | Comm. error Acc.-EQ1: Three communication errors in a row towards accessory card ACS 310 [other NIBE documents: Communication fault] | Partly | Yes |
| 283 | Comm. error Acc.-EQ1 (permanent): Permanent communication error ACS 310 / active 4-pipe cooling [other NIBE documents: Temporary communication fault, active 4-pipe cooling] | Partly | Yes |
| 284 | Temperature limiter alarm for defrost element: Temperature limiter FD3 has tripped | Not stated | Yes |
| 285 | Refrigerant sensor fault: Refrigerant sensor BQ10 (RS) out of range, lost communication or faulty | Not stated | Yes |
| 286 | Refrigerant sensor needs to be replaced: Refrigerant sensor BQ10 (RS) needs to be replaced | Not stated | Yes |
| 287 | Refrigerant sensor has to be replaced soon: Refrigerant sensor BQ10 must be replaced soon; if not replaced within the stated days operation will be limited | Not stated | Yes |
| 288 | Refrigerant sensor disconnected: Refrigerant sensor BQ10 out of range, lost communication or faulty | Not stated | Yes |
| 290 | Fan alarm: Fan speed (tachometer) signal indicates fan speed is zero | Partly | Yes |
| 291 | Charge pump alarm: Charge pump speed (tachometer) signal indicates speed is zero | Partly | Yes |
| 292 | Sen flt: BT74 cool/heat sen.: Sensor BT74 on AUX input not connected/defective | Partly | Yes |
| 293 | Low temp water out: Supply temperature BT12 out of condenser below minimum [other NIBE documents: Low temperature during cooling mode] | Partly | Yes |
| 294 | Not compatible heat pump: Outdoor unit connected is not compatible (e.g. VVM 320 with other than F2030-7/-9, F2040-8/-12) or DIP switches wrongly set [other NIBE documents: The outdoor air heat pump is not compatible / Heat pump and indoor module are incompatible] | Partly | Yes |
| 295 | Recurring high pressure: 5 repeated high pressure alarms within 4 hours | Partly | Yes |
| 296 | Uncertain sensor accuracy: Brine sensors BT10 and BT11 differ by more than 2 K at calibration | Not stated | Yes |
| 297 | Com.flt PCA Accessory (active FTX): Communication fault, active FTX accessory | Not stated | Yes |
| 298 | Preheat. failed, long run time: The inverter has tried to heat up the compressor but has failed | Partly | Yes |
| 299 | Wrong version PCA Base: Firmware on base card (AA2) too low for inverter communication [other NIBE documents: Base board AA2 software too low for inverter communication] | Partly | Yes |
| 300 | Sensor BT14 or BP9 loose or defective: Sensor BT14 or BP9 has come loose or is otherwise defective | Not stated | Yes |
| 301 | Com. error slave 1: Temporarily no communication with slave heat pump (EB101) [other NIBE documents: Communication with slave heat pump 1 missing for 15 s] | Partly | Yes |
| 302 | Com. error slave 2: Temporarily no communication with slave heat pump (EB102) [other NIBE documents: Communication with slave heat pump 2-8 missing for 15 s] | Partly | Yes |
| 303 | Com. error slave 3: Temporarily no communication with slave heat pump (EB103) [other NIBE documents: Communication with slave heat pump 2-8 missing for 15 s] | Partly | Yes |
| 304 | Com. error slave 4: Temporarily no communication with slave heat pump (EB104) [other NIBE documents: Communication with slave heat pump 2-8 missing for 15 s] | Partly | Yes |
| 305 | Com. error slave 5: Temporarily no communication with slave heat pump (EB105) [other NIBE documents: Communication with slave heat pump 2-8 missing for 15 s] | Partly | Yes |
| 306 | Com. error slave 6: Temporarily no communication with slave heat pump (EB106) [other NIBE documents: Communication with slave heat pump 2-8 missing for 15 s] | Partly | Yes |
| 307 | Com. error slave 7: Temporarily no communication with slave heat pump (EB107) [other NIBE documents: Communication with slave heat pump 2-8 missing for 15 s] | Partly | Yes |
| 308 | Com. error slave 8: Temporarily no communication with slave heat pump (EB108) [other NIBE documents: Communication with slave heat pump 2-8 missing for 15 s] | Partly | Yes |
| 313 | Dry running of circulation pump GP1 or GP2: Poor or no flow | Partly | Yes |
| 314 | Undefined fault: Initiation fault inverter / inverter not compatible / configuration file missing / charge error configuration | Not stated | Yes |
| 315 | Sensor fault on EB101: Sensor fault detected on EB101 via COM interface MHI-EMMY | Partly | Yes |
| 316 | Sensor fault BP4: Sensor fault, high pressure heating / low pressure cooling sensor in F2050 (BP4) [other NIBE documents: Sensor fault detected on EB101 via COM interface MHI-EMMY] | Partly | Yes |
| 317 | Sensor fault on EB101-BT12: Sensor fault detected on EB101 via COM interface MHI-EMMY | Partly | Yes |
| 318 | Sensor fault on EB101-BT15: Sensor fault detected on EB101 via COM interface MHI-EMMY | Partly | Yes |
| 319 | Comm.flt with EB103/4-GP12: Communication with accessory board for GP12 missing for 15 s | Partly | Yes |
| 320 | Comm.flt with EB105/6-GP12: Communication with accessory board for GP12 missing for 15 s | Partly | Yes |
| 321 | Comm. fault with EB107/8-GP12: Communication with accessory board for GP12 missing for 15 s | Partly | Yes |
| 322 | SPA not updated: Spot price could not be downloaded | Varies by model | Yes |
| 323 | Safety stop, inverter: Temporary fault in inverter, 2 times within 60 minutes [other NIBE documents: Temporary inverter fault 3 times within 2 hours or lasting 1 hour] | Partly | Yes |
| 324 | Com. fault PCA Acc. HTS 1: Communication with humidity sensor BM1 missing for 15 s | Partly | Yes |
| 325 | Temperature limiter alarm for defrost element: Temperature limiter FD3 has tripped | Partly | Yes |
| 326 | Fault in EB16: Active defrosting has failed three times in a row | Partly | Yes |
| 327 | Phase missing: Phase L2 missing 3 times within 3 hours or continuously for 1 hour [other NIBE documents: A compressor phase continuously missing to the inverter for one hour] | Partly | Yes |
| 328 | Mains disturbance: Temporary fault in inverter, 3 times within 2 hours or continuously 1 hour [other NIBE documents: Temporary fault in inverter, 3 times within 2 hours or continuously for 1 hour / Temporary inverter fault 3 times within 2 hours or continuously 1 hour] | Partly | Yes |
| 329 | Overheated inverter: Inverter temporarily reached max working temperature due to poor cooling 3 times within 2 h or continuously 1 h [other NIBE documents: Inverter temporarily reached max operating temperature due to poor cooling 3 times in 2 hours or for 1 hour] | Partly | Yes |
| 330 | Safety stop, inverter (current): Current to inverter too high, 3 times within 2 hours or continuously 1 hour [other NIBE documents: Max 'power in' temporarily too high 3 times within 2 hours or for 1 hour] | Partly | Yes |
| 331 | Overheated inverter: Inverter temporarily reached max working temperature due to poor cooling 3 times within 2 h or continuously 1 h [other NIBE documents: Inverter temporarily reached max operating temperature due to poor cooling 3 times in 2 hours or for 1 hour] | Partly | Yes |
| 332 | Inverter protection: Inverter detects temporary fault within 10 s after compressor start, 5 times in a row [other NIBE documents: Temporary inverter fault 3 times within 2 hours or continuously 1 hour] | Partly | Yes |
| 333 | Phase drop: Compressor phase missing 3 times within 2 hours or continuously 1 minute [other NIBE documents: Compressor phase missing 3 times within 2 hours or continuously for 1 minute / A phase temporarily missing 3 times within 2 hours or continuously 1 hour] | Partly | Yes |
| 334 | Max. incoming temp. exceeded: Max temperature through outdoor unit exceeded: BT3 higher than 65 C in heating mode | Partly | Yes |
| 335 | Inverter alarm type III: Not used function (false alarm) | Partly | Yes |
| 336 | Sen flt: EP44 BT2 supply temp sens.: Sensor not connected/defective | Partly | Yes |
| 337 | Sen flt: EP45 BT2 supply temp sens.: Sensor not connected/defective | Partly | Yes |
| 338 | Sen flt: EP46 BT2 supply temp sens.: Sensor not connected/defective | Partly | Yes |
| 339 | Sen flt: EP47 BT2 supply temp sens.: Sensor not connected/defective | Not stated | Yes |
| 340 | Anti-freeze supply air: Supply air temperature (BT22) below 11 C | Partly | Yes |
| 341 | Recurring safety defr.: Alarm from outdoor unit (safety defrost repeated) [other NIBE documents: Safety defrost 10 times in a row / 10 repeated defrostings according to the protection conditions] | Partly | Yes |
| 342 | Low temperature water in: Low temperature in during cooling operation [other NIBE documents: Low temperature in] | Partly | Yes |
| 343 | Low temp water out: Low temperature out during cooling operation [other NIBE documents: Low temperature out / Supply temperature BT12 out of condenser below minimum] | Partly | Yes |
| 344 | Recurring low pressure: Alarm from outdoor unit (repeated low pressure) [other NIBE documents: BP8 below limit, 5 low pressure alarms within 4 hours / 5 repeated low pressure alarms within 4 hours] | Partly | Yes |
| 345 | Temp low press: Temporary low pressure BP8 from the outdoor unit [other NIBE documents: BP8 below the limit value (information)] | Partly | Yes |
| 346 | Recurring high press: Alarm from outdoor unit (repeated high pressure) [other NIBE documents: BP9 above limit, 5 high pressure alarms within 4 hours / 5 repeated high pressure alarms within 4 hours] | Partly | Yes |
| 347 | Temp high press: Temporary high pressure BP9 from the outdoor unit [other NIBE documents: BP9 above the limit value (information)] | Partly | Yes |
| 349 | Sens flt: EQ1-BT50: Cooling accessory room sensor has no contact with control module | No | Yes |
| 350 | Sensor fault on BT50 room sensor: Sensor not connected/defective | No | Yes |
| 351 | Uncertain sensor accuracy (BT10/BT11): Brine sensors BT10 and BT11 differ by more than 2 K at calibration | Not stated | Yes |
| 352 | Uncertain sensor accuracy (BT2/BT3): Heating medium sensors BT2 and BT3 differ by more than 2 K at calibration | Not stated | Yes |
| 353 | Uncertain sensor accuracy (BT3/BT12): Heating medium sensors BT3 and BT12 differ by more than 2 K at calibration | Partly | Yes |
| 354 | Slave EB101 / failed sensor calibration BT3-BT12: Delta BT3-BT12 larger than 2 K after calibration [other NIBE documents: Delta BT3-BT12 greater than 2 K after calibration] | Partly | Yes |
| 355 | Slave EB101 / failed sensor calibration BT3-BT63: Delta BT3-BT63 larger than 2 K after calibration [other NIBE documents: Delta BT3-BT63 greater than 2 K after calibration] | Not stated | Yes |
| 356 | Failed sensor calibration: Sensor calibration differs more than 2 K between BT3 and BT63 | Not stated | Yes |
| 357 | Com.flt PCA Accessory (OPT): Permanent communication fault to OPT (gas boiler accessory) | Not stated | Yes |
| 358 | Internal OPT error: Alarm from the gas boiler | Not stated | Yes |
| 359 | Int temp OPT error: The gas boiler issues an alarm (OPT) | No | Yes |
| 361 | Sensor fault EPxx, BT3 return line sensor (listed as range 361-368): BT3 (return) not connected/defective in one of the climate systems | No | Yes |
| 362 | Sensor fault EPxx, BT3 return line sensor (listed as range 361-368): BT3 (return) not connected/defective in one of the climate systems | No | Yes |
| 363 | Sensor fault EPxx, BT3 return line sensor (listed as range 361-368): BT3 (return) not connected/defective in one of the climate systems | No | Yes |
| 364 | Sensor fault EPxx, BT3 return line sensor (listed as range 361-368): BT3 (return) not connected/defective in one of the climate systems | Varies by model | Yes |
| 365 | Sensor fault EPxx, BT3 return line sensor (listed as range 361-368): BT3 (return) not connected/defective in one of the climate systems | Varies by model | Yes |
| 366 | Sensor fault EPxx, BT3 return line sensor (listed as range 361-368): BT3 (return) not connected/defective in one of the climate systems | No | Yes |
| 367 | Sensor fault EPxx, BT3 return line sensor (listed as range 361-368): BT3 (return) not connected/defective in one of the climate systems | No | Yes |
| 368 | Sensor fault EPxx, BT3 return line sensor (listed as range 361-368): BT3 (return) not connected/defective in one of the climate systems | Varies by model | Yes |
| 369 | Error ASB1 card: Communication to ASB 1 card (AA3) missing | Partly | Yes |
| 370 | Error ASB2 card: Communication to ASB 2 card (AA23) missing | Partly | Yes |
| 371 | Perm. com. error Solar: Permanent communication fault with solar accessory board | Partly | Yes |
| 372 | Perm. com. error pool 2: No communication with the pool 2 accessory card | Partly | Yes |
| 373 | Inverter has earth fault: SOLAR accessory: the (PV) inverter has an earth fault | Not stated | Yes |
| 378 | Inverter has high DC voltage: The (PV) inverter has high DC voltage | Not stated | Yes |
| 379 | No communication with inverter for five days: No communication with the inverter for five days; check the installation | Not stated | Yes |
| 380 | Flow protect defrost: Low flow for a certain time triggers alarm to cancel defrosting | Partly | Yes |
| 382 | Inverter limited for a long period: Inverter limited by temperature protection for more than 70% of the last 48 hours | Not stated | Yes |
| 383 | Inverter alarm type II: Incorrect inverter | Partly | Yes |
| 384 | Com. flt PCA Acc. HTS 2: Communication to accessory card missing; may be due to temporary external disturbance e.g. thunder | Not stated | Yes |
| 385 | Com. flt PCA Acc. HTS 3: Communication to accessory card missing; may be due to temporary external disturbance e.g. thunder | Not stated | Yes |
| 386 | Com. flt PCA Acc. HTS 4: Communication to accessory card missing; may be due to temporary external disturbance e.g. thunder | Not stated | Yes |
| 398 | Low pressure in climate system: External pressure monitor for the climate system indicates low pressure; check pressure and top up if necessary | Not stated | Yes |
| 400 | Unspecified fault: Unspecified faults from outdoor unit [other NIBE documents: Initiation fault inverter / inverter not compatible / configuration file missing / charge error configuration] | Partly | Yes |
| 401 | Unspecified fault: The slave sends a message that does not exist in the master [other NIBE documents: Initiation fault inverter / inverter not compatible / configuration file missing / charge error configuration] | Partly | Yes |
| 403 | Sensor fault on EB101: Sensor fault detected on EB101 via COM interface MHI-EMMY [other NIBE documents: Sensor fault in the outdoor unit] | Partly | Yes |
| 404 | Sensor fault on EB101 (BP4): Sensor fault detected on EB101 via COM interface MHI-EMMY (F2040/F2050: high-pressure heating / low-pressure cooling sensor BP4) [other NIBE documents: Sensor fault in the outdoor unit / Sensor fault, high pressure heating / low pressure cooling sensor in F2050 (BP4)] | Partly | Yes |
| 412 | Sensor fault on EB101-BT12: Sensor fault detected on EB101 via COM interface MHI-EMMY [other NIBE documents: Sensor fault in the outdoor unit] | Partly | Yes |
| 415 | Sensor fault on EB101-BT15: Sensor fault detected on EB101 via COM interface MHI-EMMY [other NIBE documents: Sensor fault in the outdoor unit] | Partly | Yes |
| 418 | Low temp water out (flow protection defrosting): Flow protection during defrosting [other NIBE documents: Low flow for a certain time triggers alarm to cancel defrosting] | Partly | Yes |
| 419 | Freeze prot. exch. defr.: Frost protection exchanger defrosting | Partly | Yes |
| 420 | Inverter alarm type II (temporary communication): A temporary communication alarm with the inverter has occurred [other NIBE documents: Temporary communication fault in the inverter / Communication fault to AA2] | Partly | Yes |
| 421 | Inverter alarm type II (communication): Temporary communication alarm 3 times within 2 hours or continuously for 1 hour [other NIBE documents: Temporary communication alarm 3 times within 2 h or active for 1 h / Communication fault to AA2, 3 repeated communication faults within 2 hours] | Partly | Yes |
| 422 | Inverter alarm type II (external input, temporary): Temporary alarm on the inverter's external input [other NIBE documents: Compressor stop due to protection mode] | Partly | Yes |
| 423 | Inverter alarm type II (external input): Temporary alarm on inverter external input 3 times within 2 hours or input broken continuously for 1 hour [other NIBE documents: Temporary alarm on inverter external input 3 times within 2 h or input broken 1 h] | Partly | Yes |
| 424 | Triggered pressure switch: Temporarily triggered pressure switch [other NIBE documents: LP/HP pressure switch deployed] | Partly | Yes |
| 425 | Triggered pressure switch: High or low pressure switch (or compressor over-temperature FQ) triggered [other NIBE documents: Permanent pressure switch alarm / 2 repeated LP/HP pressure switch alarms within 2.5 hours] | Partly | Yes |
| 426 | Inverter alarm type III (temporary): Temporary fault in the inverter [other NIBE documents: Temporary internal fault in the inverter] | Partly | Yes |
| 427 | Inverter alarm type III / safety stop inverter: Temporary internal inverter fault 3 times within 2 hours or continuously for 1 hour (outdoor-unit tables: 2 times within 60 minutes) [other NIBE documents: Temporary inverter fault 2 times within 60 min / Temporary fault in inverter, 2 times within 60 minutes] | Partly | Yes |
| 428 | Inverter alarm type III (temporary internal): Temporary internal fault in the inverter [other NIBE documents: Temporary error message from inverter] | Partly | Yes |
| 429 | Inverter alarm type II / safety stop inverter: Temporary internal inverter fault 3 times within 2 hours or continuously for 1 hour [other NIBE documents: Temporary internal inverter fault 3 times within 2 h / Temporary error message from inverter, 3 times within 2 hours] | Partly | Yes |
| 430 | Inverter alarm type I (high phase voltage, temporary): Phase voltage to the inverter temporarily too high [other NIBE documents: Phase voltage to inverter too high] | Partly | Yes |
| 431 | Inverter alarm type I / high mains voltage: Phase voltage to the inverter too high for more than 1 hour (or 3 times within 3 hours) [other NIBE documents: Phase voltage to inverter too high 3 times within 3 h or continuously 1 h / Phase voltage to inverter too high, 3 times within 2 h or persistently 1 h] | Partly | Yes |
| 432 | Inverter alarm type I (low phase voltage, temporary): Phase voltage to the inverter temporarily too low [other NIBE documents: Phase voltage to inverter too low] | Partly | Yes |
| 433 | Inverter alarm type I / low mains voltage: Phase voltage to the inverter too low (below 180 V) for more than 1 hour (or 3 times within 3 hours) [other NIBE documents: Phase voltage to inverter too low 3 times within 3 h or continuously 1 h / Phase voltage to inverter too low (below 180 V), 3 times within 2 h or persistently 1 h] | Partly | Yes |
| 434 | Inverter alarm type I (compressor phase missing, temporary): A compressor phase has temporarily been missing [other NIBE documents: Phase L2 has been missing / One compressor phase missing] | Partly | Yes |
| 435 | Inverter alarm type I / phase missing: A compressor/supply phase (L2) missing to the inverter continuously for 1 hour (or 3 times within 3 hours) [other NIBE documents: Phase L2 to inverter missing 3 times within 3 h or continuously 1 h / One compressor phase missing 3 times within 2 h or continuously 1 h] | Partly | Yes |
| 436 | Inverter alarm type II (temporary internal): A temporary internal fault in the inverter has occurred [other NIBE documents: Temporary inverter fault / High current to inverter] | Partly | Yes |
| 437 | Inverter alarm type II / mains disturbance: Temporary inverter fault 3 times within 2 hours or continuously for 1 hour [other NIBE documents: Temporary inverter fault 3 times within 2 h or continuous 1 h / High current to inverter 3 times within 2 hours] | Partly | Yes |
| 438 | Inverter alarm type II (overheated inverter, temporary): Inverter temporarily reached max operating temperature because of poor cooling [other NIBE documents: Inverter temporarily reached max working temperature due to poor cooling / Inverter temporarily above max working temperature] | Partly | Yes |
| 439 | Inverter alarm type II / overheated inverter: Inverter reached max operating temperature due to poor cooling 3 times within 2 hours or continuously for 1 hour [other NIBE documents: Inverter temporarily reached max working temperature due to poor cooling 3 times within 2 h or continuously 1 h / Inverter temporarily above max working temperature 3 times within 2 hours] | Partly | Yes |
| 440 | Inverter alarm type II (high input power/current, temporary): Max 'power in' / current in temporarily too high [other NIBE documents: Max current in temporarily too high / High current to inverter] | Partly | Yes |
| 441 | Inverter alarm type II / current too high: Max current/power in too high 3 times within 2 hours or continuously for 1 hour [other NIBE documents: Max current in temporarily too high 3 times within 2 h or continuously 1 h / High current to inverter 3 times within 2 hours] | Partly | Yes |
| 442 | Inverter alarm type II (overheated inverter, temporary): Inverter temporarily reached max operating temperature because of poor cooling [other NIBE documents: Temporarily overheated inverter / Inverter temporarily above max working temperature] | Partly | Yes |
| 443 | Inverter alarm type II / overheated inverter: Inverter reached max operating temperature due to poor cooling 3 times within 2 hours or continuously for 1 hour [other NIBE documents: Inverter temporarily reached max working temperature due to poor cooling 3 times within 2 h or continuously 1 h / Inverter temporarily above max working temperature 3 times within 2 hours] | Partly | Yes |
| 444 | Inverter alarm type II (temporary internal): A temporary internal fault has occurred in the inverter [other NIBE documents: Inverter detects a temporary fault / Temporary fault in inverter] | Partly | Yes |
| 445 | Inverter alarm type II / inverter protection: Temporary inverter fault 3 times within 2 hours / within 10 s after compressor start 5 times in a row [other NIBE documents: Inverter detected a temporary fault within 10 s after compressor start, 5 times in a row / Temporary fault in inverter, 3 times within 2 hours] | Partly | Yes |
| 446 | Inverter alarm type II (compressor phase missing, temporary): A compressor phase has temporarily been missing [other NIBE documents: Compressor phase missing / One compressor phase missing] | Partly | Yes |
| 447 | Inverter alarm type II / phase drop: A compressor phase missing 3 times within 2 hours or continuously for 1 hour [other NIBE documents: Compressor phase missing 3 times within 2 h or continuously 1 h / One compressor phase missing 3 times within 2 h or continuously 1 h] | Partly | Yes |
| 448 | Inverter alarm type II (compressor below min speed, temporary): Compressor temporarily ran below allowed minimum speed [other NIBE documents: Compressor does not start when required / Compressor ran at lower speed than permitted] | Partly | Yes |
| 449 | Inverter alarm type II / failed compressor starts: Compressor ran below allowed minimum speed / failed to start 3 times within 2 hours or continuously for 1 hour [other NIBE documents: Compressor has not started when required 3 times within 2 h / Compressor ran at lower speed than permitted 3 times within 2 hours] | Partly | Yes |
| 450 | Inverter alarm type III: Not used function (false alarm) | Partly | Yes |
| 451 | Inverter alarm type III: Not used function (false alarm) | Partly | Yes |
| 452 | Inverter alarm type II (high output current, temporary): Power/current out from inverter to compressor temporarily too high [other NIBE documents: Current out from inverter to compressor too high / Current from inverter to compressor temporarily high] | Partly | Yes |
| 453 | Inverter alarm type II / high current load compressor: Output from inverter to compressor too high 3 times within 2 hours or continuously for 1 hour [other NIBE documents: Output current from inverter to compressor temporarily too high 3 times within 2 h or continuously 1 h / Current from inverter to compressor temporarily high, 3 times within 2 hours] | Partly | Yes |
| 454 | Inverter alarm type II (high output, temporary): Temporary too high output from the inverter [other NIBE documents: Power from inverter too high / Capacity from inverter temporarily too high] | Partly | Yes |
| 455 | Inverter alarm type II / high power load compressor: Too high output from inverter 3 times within 2 hours or continuously for 1 hour [other NIBE documents: Power output from inverter too high 3 times within 2 h or continuously 1 h / Capacity from inverter temporarily too high, 3 times within 2 hours] | Partly | Yes |
| 460 | Inverter alarm type II (1-phase, high input current, temporary): (1-phase only) Too high 'power in' to inverter temporarily; can be due to low incoming voltage (below 198 VAC) [other NIBE documents: (Single phase only) current into inverter temporarily too high] | Partly | Yes |
| 461 | Inverter alarm type II (1-phase, high input current): (1-phase only) Too high 'power in' to inverter 3 times within 2 hours or continuously for 1 hour; can be due to low incoming voltage [other NIBE documents: Only 1-phase: current to inverter too high 3 times within 2 h or continuously 1 h] | Partly | Yes |
| 466 | Inverter error: Too low incoming voltage to F2120 (temporary) | Partly | Yes |
| 467 | Inverter error: Too low incoming voltage to F2120 | Partly | Yes |
| 468 | Inverter alarm type III: Not used function (false alarm) | Partly | Yes |
| 469 | Inverter alarm type III: Not used function (false alarm) | Partly | Yes |
| 470 | Inverter alarm type III: Not used function (false alarm) | Partly | Yes |
| 471 | Inverter alarm type III: Not used function (false alarm) | Partly | Yes |
| 472 | Inverter alarm type III: Not used function (false alarm) | Partly | Yes |
| 473 | Inverter alarm type III: Not used function (false alarm) | Partly | Yes |
| 474 | Inverter alarm type III: Not used function (false alarm) | Partly | Yes |
| 475 | Inverter alarm type III: Not used function (false alarm) | Partly | Yes |
| 476 | Inverter alarm type III: Not used function (false alarm) | Partly | Yes |
| 477 | Inverter alarm type III: Not used function (false alarm) | Partly | Yes |
| 478 | Inverter alarm type III: Not used function (false alarm) | Partly | Yes |
| 479 | Inverter alarm type III: Not used function (false alarm) | Partly | Yes |
| 480 | Not used function: Not used function (false alarm) | Not stated | Yes |
| 481 | Inverter alarm type III: Not used function (false alarm) | Partly | Yes |
| 490 | Sensor fault BT90: Sensor BT90 not connected/defective | Not stated | Yes |
| 494 | Preheat. failed, long run time: The inverter has tried to heat up the compressor but has failed | Partly | Yes |
| 495 | Sensor BT14 or BP9 loose or defective: Sensor BT14 or BP9 has come loose or is otherwise defective | Not stated | Yes |
| 500 | Failed start, no press. diff: Pressure difference between BP9 and BP8 too low at compressor start [other NIBE documents: Incorrect pressure between BP8 and BP9 at compressor start] | No | Yes |
| 501 | Failed start, no press. diff: Pressure difference between BP9 and BP8 too low at compressor start 2 times within 30 min [other NIBE documents: Incorrect pressure set-up between BP8 and BP9 during compressor start / Pressure difference between BP9 and BP8 too low at compressor start 3 times within 30 minutes] | Partly | Yes |
| 502 | Compressor speed too low: Compressor speed below the lowest permitted speed [other NIBE documents: Compressor ran at lower speed than permitted] | Partly | Yes |
| 503 | Compressor speed too low: Compressor speed below lowest permitted speed [other NIBE documents: Compressor ran at lower speed than permitted 3 times within 2 hours] | Partly | Yes |
| 504 | The inverter has a message: The inverter has sent a message | No | Yes |
| 505 | Inverter has earth fault: Inverter has earth fault | Not stated | Yes |
| 506 | Mains voltage outside inv. work. range: Mains supply outside inverter's working range for an extended period | No | Yes |
| 507 | Mains voltage outside inv. work. range: Mains frequency outside inverter's working range | No | Yes |
| 508 | Inv. lost contact with the mains: Inverter has lost contact with the mains network | No | Yes |
| 509 | High ambient temp. at inverter: Ambient temperature at the inverter too high | No | Yes |
| 510 | The inverter has high DC voltage: Inverter has high DC voltage | Not stated | Yes |
| 511 | No comm. with inverter for five days: No communication with the inverter for five days | Not stated | Yes |
| 523 | Low flow defrosting: Low flow during defrosting [other NIBE documents: The flow is low. Check particle filter and pump / Low flow for a certain time triggers alarm to cancel defrosting] | Partly | Yes |
| 524 | Com. flt PCA Acc. HTS 2: Communication with AA34.2 missing for 15 s | Not stated | Yes |
| 525 | Com. flt PCA Acc. HTS 3: Communication with AA34.3 missing for 15 s | Not stated | Yes |
| 526 | Com. flt PCA Acc. HTS 4: Communication with AA34.4 missing for 15 s | Not stated | Yes |
| 530 | Sens flt BT3 outd air ht pump: Sensor fault BT3 (return) | Not stated | Yes |
| 531 | Sens flt BT12 outd air ht pump: Sensor fault BT12 (supply/condenser out) | Not stated | Yes |
| 532 | Sens flt BT14 outd air ht pump: Sensor fault BT14 (discharge) | Not stated | Yes |
| 533 | Sens flt BT15 outd air ht pump: Sensor fault BT15 (liquid line) | Not stated | Yes |
| 534 | Sens flt BT16 outd air ht pump: Sensor fault BT16 (evaporator) | Not stated | Yes |
| 535 | Sens flt BT17 outd air ht pump: Sensor fault BT17 (suction gas) | Not stated | Yes |
| 536 | Sens flt BT28 outd air ht pump: Sensor fault BT28 (outdoor ambient) | Not stated | Yes |
| 538 | Sens flt BP8 outd air ht pump: Sensor fault BP8 (low pressure sensor) | Not stated | Yes |
| 539 | Sens flt BP9 outd air ht pump: Sensor fault BP9 (high pressure sensor) | Not stated | Yes |
| 541 | Sens flt BT84 outd air ht pump: Sensor fault BT84 | Not stated | Yes |
| 564 | Sensor fault in BT50 room sensor (HTS 1-4) (listed as range 564-567): Sensor fault BT50 in HTS 1-4 | No | Yes |
| 565 | Sensor fault in BT50 room sensor (HTS 1-4) (listed as range 564-567): Sensor fault BT50 in HTS 1-4 | No | Yes |
| 566 | Sensor fault in BT50 room sensor (HTS 1-4) (listed as range 564-567): Sensor fault BT50 in HTS 1-4 | No | Yes |
| 567 | Sensor fault in BT50 room sensor (HTS 1-4) (listed as range 564-567): Sensor fault BT50 in HTS 1-4 | No | Yes |
| 568 | Sensor fault in BM1 humidity sensor (HTS 1-4) (listed as range 568-571): Sensor fault BM1 in HTS 1-4 | Not stated | Yes |
| 569 | Sensor fault in BM1 humidity sensor (HTS 1-4) (listed as range 568-571): Sensor fault BM1 in HTS 1-4 | Not stated | Yes |
| 570 | Sensor fault in BM1 humidity sensor (HTS 1-4) (listed as range 568-571): Sensor fault BM1 in HTS 1-4 | Not stated | Yes |
| 571 | Sensor fault in BM1 humidity sensor (HTS 1-4) (listed as range 568-571): Sensor fault BM1 in HTS 1-4 | Not stated | Yes |
| 572 | Sensor fault in BT50 room sensor (RMU 1-4) (listed as range 572-575): Sensor fault BT50 in RMU 1-4 | No | Yes |
| 573 | Sensor fault in BT50 room sensor (RMU 1-4) (listed as range 572-575): Sensor fault BT50 in RMU 1-4 | No | Yes |
| 574 | Sensor fault in BT50 room sensor (RMU 1-4) (listed as range 572-575): Sensor fault BT50 in RMU 1-4 | No | Yes |
| 575 | Sensor fault in BT50 room sensor (RMU 1-4) (listed as range 572-575): Sensor fault BT50 in RMU 1-4 | No | Yes |
| 580 | Cold outd air, cooling mode: Outdoor temperature at outdoor unit outside its working range [other NIBE documents: Outside temperature too low to ensure safe operation] | Partly | Yes |
| 581 | Warm outd air, cool. mode: Outdoor temperature at outdoor unit outside its working range | Partly | Yes |
| 582 | Low flow defrosting (slave EB102-EB108) (listed as range 582-588): Low flow during defrosting in one of EB102-EB108 | Partly | Yes |
| 583 | Low flow defrosting (slave EB102-EB108) (listed as range 582-588): Low flow during defrosting in one of EB102-EB108 | Partly | Yes |
| 584 | Low flow defrosting (slave EB102-EB108) (listed as range 582-588): Low flow during defrosting in one of EB102-EB108 | Partly | Yes |
| 585 | Low flow defrosting (slave EB102-EB108) (listed as range 582-588): Low flow during defrosting in one of EB102-EB108 | Partly | Yes |
| 586 | Low flow defrosting (slave EB102-EB108) (listed as range 582-588): Low flow during defrosting in one of EB102-EB108 | Partly | Yes |
| 587 | Low flow defrosting (slave EB102-EB108) (listed as range 582-588): Low flow during defrosting in one of EB102-EB108 | Partly | Yes |
| 588 | Low flow defrosting (slave EB102-EB108) (listed as range 582-588): Low flow during defrosting in one of EB102-EB108 | Partly | Yes |
| 589 | Incorrect PCB in heat pump: The heat pump has the wrong baseboard | Not stated | Yes |
| 609 | Sensor fault PCB: Repeated sensor failures | Not stated | Yes |
| 614 | Sensor fault PCB: Repeated sensor failures | Not stated | Yes |
| 615 | Low pressure switch tripped: 2 repeated LP alarms within 2.5 hours | Partly | Yes |
| 616 | Persistent high pressure switch alarm: 2 repeated HP alarms within 2.5 hours | Partly | Yes |
| 617 | Temperature protection compressor activated: 2 repeated FQ alarms within 2.5 hours | Partly | Yes |
| 740 | Sens flt BT84 outd air ht pump: Sensor fault BT84 | Not stated | Yes |
| 742 | Sens flt BP9 outd air ht pump: Sensor fault BP9 (high pressure sensor) | Not stated | Yes |
| 744 | Sens flt BP8 outd air ht pump: Sensor fault BP8 (low pressure sensor) | Not stated | Yes |
| 746 | Sens flt BT28 outd air ht pump: Sensor fault BT28 (outdoor ambient) | Not stated | Yes |
| 748 | Sens flt BT17 outd air ht pump: Sensor fault BT17 (suction gas) | Not stated | Yes |
| 750 | Sens flt BT3 outd air ht pump: Sensor fault BT3 (return) | Not stated | Yes |
| 752 | Sens flt BT16 outd air ht pump: Sensor fault BT16 (evaporator) | Not stated | Yes |
| 754 | Sens flt BT15 outd air ht pump: Sensor fault BT15 (liquid line) | Not stated | Yes |
| 756 | Sens flt BT14 outd air ht pump: Sensor fault BT14 (discharge) | Not stated | Yes |
| 758 | Sens flt BT12 outd air ht pump: Sensor fault BT12 (supply/condenser out) | Not stated | Yes |
| 762 | Temperature protection compressor activated: 2 repeated FQ alarms within 2.5 hours | Partly | Yes |
| 765 | Persistent high pressure switch alarm: 2 repeated HP alarms within 2.5 hours | Partly | Yes |
| 767 | Low pressure switch tripped: 2 repeated LP alarms within 2.5 hours | Partly | Yes |
| 900 | Country not selected: Country not defined | Not stated | Yes |
| 901 | Com.flt PCA F135: Communication with F135 exhaust air module missing for 15 s | Partly | Yes |
| 902 | Failed defrosting (exhaust air module): Defrost stop conditions in exhaust air module not met for 3 hours | Partly | Yes |
| 903 | Low defrosting temp (exhaust air module): Low defrosting temperature in exhaust air module | Partly | Yes |
| 904 | High evaporation temp. (exhaust air module): Evaporation sensor BT16 in exhaust air module 50 C or higher | Partly | Yes |
| 905 | Fan alarm from heat pump (exhaust air module): PWM signal on fan in exhaust air module lower than 29% | Partly | Yes |
| 908 | Pump fault (exhaust air module): PWM signal on circulation pump GP12 in exhaust air module lower than 7% | Partly | Yes |
| 912 | Sensor fault: BT12 condenser out (exhaust air module): BT12 in exhaust air module unreasonable value for longer than 2 s | Not stated | Yes |
| 913 | Sensor fault: BT3 return line sensor (exhaust air module): BT3 in exhaust air module unreasonable value for longer than 2 s | Not stated | Yes |
| 916 | Sensor fault: BT16 evaporator sensor (exhaust air module): BT16 in exhaust air module unreasonable value for longer than 2 s | Not stated | Yes |
| 976 | Sen flt: BT76 defrosting (exhaust air module): BT76 in exhaust air module unreasonable value for longer than 2 s | Not stated | Yes |
| 977 | Sen flt: BT77 air in (exhaust air module): BT77 (incoming air) in exhaust air module unreasonable value for longer than 2 s | Not stated | Yes |
| 990 | Country not defined: Country not selected | No | Yes |
| 995 | External alarm: An alarm according to function chosen on the AUX input [other NIBE documents: Alarm according to selected function on AUX input] | No | Yes |
| 996 | Blocked (additional heat): External additional heat blocked through AUX input [other NIBE documents: Additional heat externally blocked] | Partly | Yes |
| 997 | Blocked (compressor): Compressor externally blocked through AUX input [other NIBE documents: Compressor externally blocked] | Partly | Yes |
| 998 | Starts: Display/machine has restarted [other NIBE documents: Display/installation has restarted] | No | Yes |