3 Hammersmith Road W14 8XJ
| Message | Possible cause |
|---|---|
| F.00 Interruption: Flow sensor | Flow temperature sensor defective or not connected |
| F.01 Interruption: Return sensor | Return temperature sensor defective or not connected |
| F.10 Short circuit: Flow sensor | Flow temperature sensor defective or has short-circuited |
| F.11 Short circuit: Return sensor | Return temperature sensor defective or has short-circuited |
| F.20 Safety switch-off: Temperature limiter | Maximum temperature at the flow/return temperature sensor is too high when the safety cut out function is operating using the NTC |
| F.22 Safety switch-off: Low water pressure | No/insufficient water in the product or the water pressure is too low |
| F.23 Safety switch-off: Temp. spread too large | Temperature spread too great. Water circulation too low |
| F.24 Safety switch-off: Temp. incr. too fast | Temperature increase too fast |
| F.25 Safety switch-off: Flue temp. too high | Flue gas temperature too high |
| F.26 Fault: Fuel valve not working | Gas valve assembly stepper motor defective or not connected |
| F.27 Safety switch-off: Flame simulation | Monitoring electrode reports an incorrect flame |
| F.28 Start-up failure: Ignit. unsuccessful | Failure during start-up or ignition unsuccessful. Gas pressure monitor or thermal cut-out has been triggered. |
| F.29 Operating failure: Ignit. unsuccessful | Gas supply interrupted intermittently. Re-ignition failed. |
| F.32 Fault: Fan | Fan defective or not connected |
| F.49 Fault: eBUS | Undervoltage on the eBUS |
| F.61 Fault: Fuel valve actuation | The gas valve assembly cannot be actuated |
| F.62 Fault: Fuel valve switch off delay | Delayed switch-off sequence for the gas valve after the flame is extinguished |
| F.63 Fault: EPROM | EEPROM faulty |
| F.64 Fault: Electronics/sensor | Electronics, safety-relevant sensor or cable defective |
| F.65 Fault: Electronics temp. | Electronics defective or too hot due to external influences |
| F.67 Fault: Electronics/flame | Implausible flame signal |
| F.68 Fault: Flame signal un stable | Flame monitor reports an un stable flame signal |
| F.70 Fault: Invalid Device Specific Number | Incorrect/missing Device Specific Number or incorrect/missing coding resistor |
| F.71 Fault: Flow sensor | Flow temperature sensor re turns implausible values |
| F.72 Fault: Flow/return sensor | Temperature difference between flow and return temperature sensor is too great |
| F.73 Fault: Water press. sensor (signal too weak) | Water pressure sensor reports that the water pressure is too low |
| F.74 Fault: Water press. sensor (signal too strong) | Water pressure too high |
| F.75 Fault: Pump/ water shortage | Insufficient pressure jump de tected when starting the pump |
| F.77 Fault: Flue non-ret. valve/condens. pump | No flue non-return flap feed back; condensate pump over flow |
| F.78 Interrupt.: DHW outlet sensor on ext. contr. | UK link box is connected without the domestic hot water temperature sensor being bridged |
| F.83 Fault: NTC temp. gradient | Temperature difference between flow and return temperature sensor is too small |
| F.84 Fault: NTC temp. diff. implausible | Temperature difference is im plausible |
| F.85 Fault: NTCs fitted incorrectly | Flow/return temperature sensors returning incorrect/implausible values |
| Communication fault | Communication fault between the display and the PCB in the electronics box |
| Message | Possible cause |
|---|---|
| F.00 Interruption: Flow sensor | Flow temperature sensor de- fective or not connected |
| F.01 Interruption: Return sensor | Return temperature sensor de- fective or not connected |
| F.02 Interruption: DHW outlet sensor | Cylinder temperature sensor for the shift-load cylinder defective or not connected |
| F.03 Interruption: Cylinder sensor | Temperature sensor for the shift-load cylinder defective or not connected |
| F.10 Short circuit: Flow sensor | Flow temperature sensor de- fective or has short-circuited |
| F.11 Short circuit: Return sensor | Return temperature sensor de- fective or has short-circuited |
| F.12 Short circuit: DHW outlet sensor | Cylinder temperature sensor defective or has short-circuited |
| F.13 Short circuit: Cylinder sensor | Warm start sensor/cylinder tem- perature sensor defective or not connected |
| F.20 Safety switch-off: Tem- perature limiter | Maximum temperature at the flow/return temperature sensor is too high when the safety cut- out function is operating using the NTC |
| F.22 Safety switch-off: Low water pressure | No/insufficient water in the product or the water pressure is too low |
| F.23 Safety switch-off: Temp.spread too large | Temperature spread too great. Water circulation too low |
| F.24 Safety switch-off: Temp. incr. too fast | Temperature increase too fast |
| F.25 Safety switch-off: Flue temp. too high | flue gas temperature too high |
| F.26 Fault: Fuel valve not working | Gas valve assembly stepper motor defective or not connec- ted |
| F.27 Safety switch-off: Flame simulation | Monitoring electrode reports an incorrect flame |
| F.28 Start-up failure: Ignit. unsuccessful | Failure during start-up or igni- tion unsuccessful. Gas pressure monitor or thermal cut-out has been triggered. |
| F.29 Operating failure: Ignit. unsuccessful | Gas supply interrupted intermit- tently. Re-ignition failed. |
| F.32 Fault: Fan | Fan defective or not connected |
| F.42 Fault: Coding resistor | Coding resistor or gas group resistor causes a short circuit |
| F.49 Fault: eBUS | Undervoltage on the eBUS |
| F.52 Mass flow sensor not connected | Mass flow sensor defective or not connected |
| F.53 Fault: Mass flow sensor | Mass flow sensor defective |
| F.54 Fault: Boiler start | No gas inlet pressure or insuffi- cient gas inlet pressure causes faults when the product is star- ted |
| F.55 Fault: CO sensor | All-gas sensor defective or has short-circuited |
| F.56 Safety switch-off: CO limit exceeded | Safety shutdown after the CO limit value is exceeded |
| F.57 Fault: Measuring pro- gram | Regulation fault caused by cor- roded ignition electrode |
| F.61 Fault: Fuel valve actu- ation | The gas valve assembly cannot be actuated |
| F.62 Fault: Fuel valve switch- off delay | Delayed switch-off sequence for the gas valve after the flame is extinguished |
| F.63 Fault: EEPROM | EEPROM faulty |
| F.64 Fault: Electronics/sensor | Electronics, safety-relevant sensor or cable defective |
| F.65 Fault: Electronics temp. | Electronics defective or too hot due to external influences |
| F.67 Fault: Electronics/flame | Implausible flame signal |
| F.68 Fault: Flame signal un- stable | Flame monitor reports an un- stable flame signal |
| F.70 Fault: Invalid Device Specific Number | Incorrect/missing Device Specific Number or incorrect/missing coding resistor |
| F.71 Fault: Flow sensor | Flow temperature sensor re- turns implausible values |
| F.72 Fault: Flow/return sensor | Temperature difference between flow and return temperature sensor is too great |
| F.73 Fault: Water press. sensor (signal too weak) | Water pressure sensor reports that the water pressure is too low |
| F.74 Fault: Water press. sensor (signal too strong) | Water pressure too high |
| F.75 Fault: Pump/ water shortage | Insufficient pressure jump de- tected when starting the pump |
| F.77 Fault: Flue non-ret. valve/condens. pump | No flue non-return flap feed- back; condensate pump over- flow |
| F.78 Interrupt.: DHW outlet sensor on ext. contr. | UK link box is connected without the domestic hot water temperature sensor being bridged |
| F.80 Fault: actoSTOR inlet sensor | Inlet temperature sensor defect- ive or not connected |
| F.81 Fault: cylinder charging pump | Cylinder is not fully charged after specified time |
| F.82 Fault: Ext. current anode | External current anode defect- ive or not connected |
| F.83 Fault: NTC temp. gradi- ent | Temperature difference between flow and return temperature sensor is too small |
| F.84 Fault: NTC temp. diff. implausible | Temperature difference is im- plausible |
| F.85 Fault: NTCs fitted incor- rectly | Flow/return temperat- ure sensors returning incorrect/implausible values |
| F.90 Fault: Communication | Communication with actoSTOR interrupted |
| F.91 Fault: actoSTOR sensor | Sensor on the actoSTOR is defective |
| F.92 Fault: Incorrect gas type | The coding resistor on the PCB does not match the gas group that is entered |
| F.93 Fault: Check gas route | Combustion quality outside the permitted range |
| F.94 Fault: Vortex and differen- tial pressure | Sensors return implausible val- ues. |
| LED actoSTOR Modul actoSTOR communication status | actoSTOR communication status: Not connected, Con- nection error, Connection active |
| Communication fault | Communication fault between the display and the PCB in the electronics box |
| Fault code | Meaning |
|---|---|
| F.00 | Fault: Flow temperature sensor |
| F.01 | Fault: Return temperature sensor |
| F.10 | Short circuit: Flow temperature sensor |
| F.11 | Short circuit: Return temperature sensor |
| F.12 and F.91 | Short circuit: Cylinder temperature sensor |
| F.13 | Short circuit: Domestic hot water cylinder temperature sensor |
| F.20 | Safety switch-off: Overheating temperat- ure reached |
| F.22 | Safety switch-off: Low water pressure in the boiler |
| F.23 | Safety switch-off: Temperature difference too great (NTC1/NTC2) |
| F.24 | Safety switch-off: Temperature rise too fast |
| F.25 | Safety switch-off: Flue gas temperature too high |
| F.27 | Safety switch-off: Fault in flame detection |
| F.28 | Fault: Ignition unsuccessful when starting up |
| F.29 | Fault: Flame loss |
| F.32 | Fan frost protection function active: Fan speed outside the tolerance values |
| F.49 | eBUS fault: Voltage too low |
| F.61 | Fault: Gas valve control system |
| F.62 | Fault: Gas valve switch-off control |
| F.63 | Fault: EEPROM |
| F.64 | Fault: Electronics/sensor/analogue-to- digital converter |
| F.65 | Fault: Electronics temperature too high |
| F.67 | Value sent back by ASIC is incorrect (flame signal) |
| F.68 | Fault: Unstable flame (analogue input) |
| F.70 | Invalid product code (DSN) |
| F.71 | Fault: Flow/return temperature sensor |
| F.72 | Fault: Deviation in the water pressure sensor/return temperature sensor |
| F.73 | Fault: Water pressure sensor not con- nected or has short-circuited |
| F.74 | Fault: Electrical problem in the water pressure sensor |
| F.75 | Fault: Pressure sensor |
| F.76 | The safety cut-out in the primary heat exchanger is defective |
| F.77 | Fault: Condensate or smoke |
| F.78 | Interruption to DHW outlet sensor at external controller |
| F.83 | Fault: Dry fire |
| F.84 | Fault: Flow/return temperature sensor |
| F.85 | Fault: Temperature sensor |
| F.86 | Fault: Underfloor heating contact |
| F.87 | Fault: Electrodes |
| F.88 | Fault: Gas valve |
| F.89 | Fault: Pump |
| Connection | No communication between the PCB and the user interface |
| Code | Meaning |
|---|---|
| F.00 | Interruption: Flow sensor |
| F.01 | Interruption: Return sensor |
| F.02 | Interruption: DHW outlet sensor |
| F.03 | Interruption: Cylinder sensor |
| F.10 | Short circuit: Flow sensor |
| F.11 | Short circuit: Return sensor |
| F.12 | Short circuit: DHW outlet sensor |
| F.13 | Short circuit: Cylinder sensor |
| F.20 | Safety switch-off: Temperature limiter |
| F.22 | Safety switch-off: Low water pressure |
| F.23 | Safety switch-off: Temp.spread too large |
| F.24 | Safety switch-off: Temp. incr. too fast |
| F.25 | Safety switch-off: Flue temp. too high |
| F.26 | Fault: Fuel valve not working |
| F.27 | Safety switch-off: Flame simulation |
| F.28 | Start-up failure: Ignit. unsuccessful |
| F.29 | Start-up failure: Ignit. unsuccessful |
| F.32 | Fault: Fan |
| F.33 | Pressure switch |
| F.35 | Fault: Air/flue gas duct |
| F.42 | Fault: Coding resistor |
| F.49 | Fault: eBUS |
| F.55 | Fault: CO sensor |
| F.56 | Safety switch-off: CO limit exceeded |
| F.57 | Fault: Measuring program |
| F.61 | Fault: Fuel valve actuation |
| F.62 | Fault: Fuel valve switch-off delay |
| F.63 | Fault: EEPROM |
| F.64 | Fault: Electronics/sensor |
| F.65 | Fault: Electronics temp. |
| F.67 | Fault: Electronics/flame |
| F.68 | Fault: Flame signal unstable |
| F.70 | Fault: Invalid Device Specific Number |
| F.71 | Fault: Flow sensor |
| F.72 | Fault: Flow/return sensor |
| F.73 | Fault: Water press. sensor |
| F.74 | Fault: Water press. sensor |
| F.75 | Fault: Pump/ water shortage |
| F.77 | Fault: Flue non-ret. valve/condens. pump |
| F.78 | Interrupt.: DHW outlet sensor on ext. contr. |
| F.80 | Fault: actoSTOR inlet sensor |
| F.81 | Fault: cylinder charging pump |
| F.82 | Fault: Ext. current anode |
| F.83 | Fault: NTC temp. gradient |
| F.84 | Fault: NTC temp. diff. implausible |
| F.85 | Fault: NTCs fitted incorrectly |
| F.90 | Fault: Communication |
| F.94 | Fault: Vortex and differential pressure |
| LED actoSTOR module | actoSTOR electronics status |
| Communication fault | Communication fault |
| Code | Meaning |
|---|---|
| F.00 | Flow temperature sensor interruption |
| F.01 | Return temperature sensor interruption |
| F.02 | Interruption cylinder charging sensor actoSTOR (NTC) only in combination with F.91 |
| F.03 | Interruption cylinder sensor actoSTOR (NTC) only in combination with F.91 |
| F.10 | Flow NTC short circuit |
| F.11 | Return NTC short circuit |
| F.12 | Short circuit at cylinder charging sensor (NTC) only in combination with F.91 |
| F.13 | Product with integrated hot water generation: Short circuit warm start sensor/cylinder sensor Product with integrated hot water generation and actoSTOR: Short circuit cylinder sensor (NTC) only in combination with F.91 |
| F.20 | Safety switch-off: Temperature limiter |
| F.22 | Safety switch-off: Low water pressure |
| F.23 | Safety switch-off: Temperature difference too great |
| F.24 | Safety switch-off: Temperature rise too fast |
| F.25 | Safety switch-off: Flue gas temperature too high |
| F.26 | Fault: Gas valve without function |
| F.27 | Safety switch-off: Flame simulation |
| F.28 | Failure during start-up: Ignition unsuccess- ful |
| F.29 | Failure during operation: Re-ignition unsuc- cessful |
| F.32 | Fault: Fan |
| F.42 | Coding resistance fault (possible in combin- ation with F.70) |
| F.49 | Fault: eBUS |
| F.52 | Contact fault mass flow sensor/Venturi |
| F.53 | Combustion regulation fault |
| F.54 | Fault in the gas supply (in combination with F.28/F.29) |
| F.56 | Combustion component fault |
| F.57 | End comfort protection mode |
| F.61 | Gas valve actuation fault |
| F.62 | Gas valve switch-off delay |
| F.63 | Fault: EEPROM |
| F.64 | Fault: Electronics/NTC |
| F.65 | Fault: Electronics temp. |
| F.67 | Fault: Electronics/flame |
| F.68 | Fault: Unstable flame signal |
| F.70 | Fault: Invalid Device Specific Number |
| F.71 | Flow NTC fault |
| F.72 | Flow/return NTC fault |
| F.73 | Water pressure sensor signal in the wrong range (too low) |
| F.74 | Water pressure sensor signal outside cor- rect range (too high) |
| F.75 | Fault: No pressure change detection when starting pump |
| F.77 | Fault: Flue non-return flap/condensate pump |
| F.78 | Interruption to DHW outlet sensor at the external controller |
| F.80 | Interruption or short circuit of secondary heat exchanger inlet sensor; only in connection with F.91 |
| F.81 | actoSTOR charging pump defective; only in combination with F.91 |
| F.83 | Fault: Flow and/or return temperature sensor temperature change |
| F.84 | Fault: Flow/return temperature sensor tem- perature difference implausible |
| F.85 | Fault: Flow and return temperature sensors incorrectly installed |
| F.90 | Communication with actoSTOR module interrupted |
| F.91 | Sensor/actuator fault on actoSTOR module |
| F.92 | Coding resistance fault |
| F.93 | Poor combustion quality |
| LED actoSTOR module | actoSTOR electronics status |
| Communication fault | No communication with the PCB |
