Vaillant ecoTEC Plus Combi

F.000 The signal for the flow temperature sensor has been interrupted. F.001 The signal for the return temperature sensor has been interrupted. F.002 The signal for the domestic hot water connection temperature sensor has been interrupted. F.003 The signal for the cylinder temperature sensor has been interrupted. F.010 The flow temperature sensor has short-circuited. F.011 The return temperature sensor has short-circuited. F.012 The domestic hot water connection temperature sensor has short-circuited. F.013 The cylinder temperature sensor has short-circuited. F.020 The safety cut-out (SCO) interrupts the gas valve control. The gas valve was closed because the temperature of the flow or return temperature sensor has exceeded the maximum limit. F.022 No/insufficient water in the product or the water pressure is too low. F.023 The temperature spread between the flow/return is too great. F.024 The temperature increases too quickly. F.025 The flue gas temperature is too high. F.027 A flame signal has been detected while the burner is off. F.028 The flame signal was not detected during the ignition phase. F.029 The ignition following a flame loss during operation was unsuccessful. F.032 The fan speed is outside of the tolerance. F.035 The air/flue pipe is blocked. F.040 The air ratio is too low. F.042 The coding resistor (in the wiring harness) or the gas group resistor (on the PCB, if available) is invalid. F.044 The ionisation signal for the control electrode is too low. The drift adaptation has failed. F.047 The signal for the domestic hot water temperature sensor at the output for the internal cylinder is implausible. F.049 The eBUS has short-circuited or two active eBUS sources have inverted polarity. F.057 The combustion regulation has failed and the associated limp home mode has failed. F.061 The ASIC or μControl does not run in the defined times. F.062 The flame switch-off was detected after a delay. F.063 EEPROM reports faults during the read/write test. F.064 The sensor signal could not be converted correctly. F.065 The permissible operating temperature range for an electronic component has been exceeded. F.067 The flame monitor is defective. F.068 The flame monitor reports an unstable signal. F.070 The Device Specific Number (DSN) is incorrect, missing or does not match the coding resistor. F.071 Flow temperature sensor returns implausible values. F.072 The temperature spread between the flow and return temperature sensor is invalid. F.074 The signal for the water pressure sensor has been interrupted. F.075 The pressure change is too low when the heating pump is started up. F.076 The overheating protection for the primary heat exchanger is active. F.077 A condensate pump or an external flue non-return flap is blocking the burner operation. F.078 The control centre is not supported by the unit. F.080 The cold water inlet temperature sensor in the internal cylinder is defective. F.081 Cylinder charging has failed. F.083 When the burner starts, no temperature increase is registered at the flow or return temperature sensor or the temperature increase here is too slow. F.084 The temperature difference between the flow and return temperature sensors returns implausible values. F.085 The NTC sensors are installed incorrectly. F.087 The ignition transformer is not connected to the PCB. F.088 The electrical connection to the gas valve has been interrupted. F.089 The installed heating pump does not match the unit type. F.090 Communication with the internal cylinder has been interrupted. F.092 The gas-type conversion was not completed correctly. F.095 The gas valve stepper motor has reached the minimum permissible step number. F.096 The gas valve stepper motor has reached the maximum permissible step number. F.097 The self-test of the main PCB has failed. F.105 When replacing the gas valve assembly or replacing the PCB and the display at the same time, the gas valve assembly offset must be set according to the current gas valve assembly. F.110 No successful ignition could be detected with the enriched gas-air mixture. F.194 The power supply unit for the PCB is defective. F.195 The unit has detected significant undervoltage in the power supply. F.196 The unit has detected significant overvoltage in the power supply. F.228 The unit was in limp home mode. In this status, ignition was unsuccessful during the start phase. F.229 The unit was in limp home mode. In this status, ignition was unsuccessful following a flame loss. F.235 The air/flue pipe is blocked during initial start-up. F.281 The flame has failed during the stabilisation period. F.291 The flame has failed during the stabilisation period following flame loss during operation. F.317 The signal for the volume flow sensor in the domestic hot water circuit is implausible. F.318 The 3-port motorised valve does not move. F.320 The heating pump is blocked. The unlocking function was not successful. F.321 The pump electronics are defective. F.322 The heating pump has overheated. The temperature could not be lowered by the limp home mode. F.323 The heating pump is dry running. F.324 The electrical connection to the pump has been interrupted. F.325 The heating pump has a fault. F.326 The hydraulic sensor and actuator test has detected at least two hydraulic components that are not working. F.327 The minimum heating volume flow is limited due to there being no domestic hot water circuit connected. F.330 The pump is not responding to commands during the hydraulic test. F.334 The configuration of the flue system was not completed. F.336 The unit is not permitted in this configuration. F.337 The multiple-flue configuration conversion set is not suitable for the heat cell. F.338 Incorrect multiple-flue configuration setting F.342 The air-mass flow is not within the permitted limits. F.343 The signal for the air-mass flow sensor is not plausible. F.344 The control electrode can no longer be used. F.347 Condensate has been detected in the combustion chamber. The burner operation is interrupted. F.363 The display's EEPROM reports errors during the read/write test. F.707 No communication is possible between the display and the PCB. F.905 Communication interface switched off