| Statuscode | Link | Status | Meaning | Applicable to |
|---|---|---|---|---|
| S.00 | Heating: No heat de- mand | Heating has no heat demand. The burner is off. | Heating mode (all models) | |
| S.01 | Heating mode: Fan start- up | The fan start-up for heating mode is activated. | Heating mode (all models) | |
| S.02 | Heating mode: Pump pre-run | The pump prerun for heating mode is activated. | Heating mode (all models) | |
| S.03 | Heating mode: Ignition | The ignition for heating mode is activated. | Heating mode (all models) | |
| S.04 | Heating mode: Burner on | The burner for heating mode is activated. | Heating mode (all models) | |
| S.05 | Heating mode: Pump/fan overrun | The pump/fan overrun for heating mode is activated. | Heating mode (all models) | |
| S.06 | Heating mode: Fan over- run | The fan overrun for heating mode is activated. | Heating mode (all models) | |
| S.07 | Heating mode: Pump overrun | The pump overrun for heating mode is activated. | Heating mode (all models) | |
| S.08 | Heating mode: Anti-cyc- ling time | The anti-cycling time for heating mode is activated. | Heating mode (all models) | |
| S.10 | DHW demand | The domestic hot water demand is activated. | Domestic hot water mode (ecotec combination boilers only) | |
| S.11 | DHW mode: Fan start-up | The fan start-up for domestic hot water mode is activated. | Domestic hot water mode (ecotec combination boilers only) | |
| S.13 | DHW mode: Ignition | The ignition for domestic hot water mode is activated. | Domestic hot water mode (ecotec combination boilers only) | |
| S.14 | DHW mode: Burner on | The burner for domestic hot water mode is activated. | Domestic hot water mode (ecotec combination boilers only) | |
| S.15 | DHW mode: Pump/fan overrun | The pump/fan overrun for domestic hot water mode is activated. | Domestic hot water mode (ecotec combination boilers only) | |
| S.16 | DHW mode: Fan overrun | The fan overrun for domestic hot water mode is activated. | Domestic hot water mode (ecotec combination boilers only) | |
| S.17 | DHW mode: Pump over- run | The pump overrun for domestic hot water mode is activated. | Domestic hot water mode (ecotec combination boilers only) | |
| S.20 | DHW demand | The domestic hot water demand is activated. | Warm start (ecotec combination boilers only) / Charge hot water cylinder (ecotec systems boilers only) | |
| S.21 | DHW mode: Fan start-up | The fan start-up for domestic hot water mode is activated. | Warm start (ecotec combination boilers only) / Charge hot water cylinder (ecotec systems boilers only) | |
| S.22 | DHW mode: Pump pre- run | The pump prerun for domestic hot water mode is activated. | Warm start (ecotec combination boilers only) / Charge hot water cylinder (ecotec systems boilers only) | |
| S.23 | DHW mode: Ignition Burner on | The ignition for domestic hot water mode is activated. | Warm start (ecotec combination boilers only) / Charge hot water cylinder (ecotec systems boilers only) | |
| S.24 | DHW mode: | The burner for domestic hot water mode is activated. | Warm start (ecotec combination boilers only) / Charge hot water cylinder (ecotec systems boilers only) | |
| S.25 | DHW mode: Pump/fan overrun | The pump/fan overrun for domestic hot water mode is activated. | Warm start (ecotec combination boilers only) / Charge hot water cylinder (ecotec systems boilers only) | |
| S.26 | DHW mode: Fan overrun | The fan overrun for domestic hot water mode is activated. | Warm start (ecotec combination boilers only) / Charge hot water cylinder (ecotec systems boilers only) | |
| S.27 | DHW mode: Pump over- run | The pump overrun for domestic hot water mode is activated. | Warm start (ecotec combination boilers only) / Charge hot water cylinder (ecotec systems boilers only) | |
| S.28 | DHW anti-cycling time | The anti-cycling time for domestic hot water mode is activated. | Warm start (ecotec combination boilers only) / Charge hot water cylinder (ecotec systems boilers only) | |
| S.30 | No heat demand: Con- troller | Room thermostat blocks heating mode. | All boilers | |
| S.31 | No heat demand: Sum- mer mode | Summer mode is activated; there is no heat demand. | All boilers | |
| S.32 | Waiting time deviation: Fan speed | The waiting period for the fan start-up is activated. | All boilers | |
| S.34 | Heating mode: Frost pro- tection | The frost protection function for heating mode is activated. | All boilers | |
| S.39 | Contact thermostat triggered | The surface-mounted thermostat or the condensate pump has triggered. | All boilers | |
| S.40 | Comfort protection act- ive | The comfort protection mode is activated. | All boilers | |
| S.41 | Water pressure too high | The system pressure is too high. | All boilers | |
| S.42 | Flue non-return flap closed | Flue non-return flap return signal blocks burner operation (only in conjunction with the multi-functional module) or condensate pump defective, heat demand is blocked. | All boilers | |
| S.46 | Comfort protection: Min- imum load, loss of flame | Comfort protection mode for flame loss at minimum load is activated. | All boilers | |
| S.53 | Waiting time: Water shortage | The product is within the waiting period of the modulation block/operating block function as a result of a water deficiency (flow/return spread too large). | All boilers | |
| S.54 | Waiting time: Water shortage | Product is in the waiting period of the operation blocking function as a result of low water pressure (temperature gradient). | All boilers | |
| S.57 | Waiting time: Measuring program | The product is within the waiting period as a result of the measuring programme. | All boilers | |
| S.58 | Burner modulation limit- ation | The burner modulation limitation is activated. | All boilers | |
| S.61 | Fault: Incorrect gas type | The coding resistor on the PCB does not match the entered gas group (see also F.92) | All boilers | |
| S.62 | Adjust CO2 | Set the CO2 content. | All boilers | |
| S.63 | Fault: Check gas route | A fault message is activated. Check the gas route. | All boilers | |
| S.76 | Service message: Check water pressure | A service message is activated. Check the water pressure. | All boilers | |
| S.88 | Purging programme is running | The purge programme is activated. | All boilers | |
| S.92 | Water circulation volume self-test | The self-test for the water circulation volume is activated. | All boilers | |
| S.93 | Flue gas measurement not possible | Flue gas analysis is not currently possible. | All boilers | |
| S.96 | Return temperature sensor self-test | The self-test for the return temperature sensor is activated. | All boilers | |
| S.97 | Water pressure sensor self-test | The self-test for the water pressure sensor is activated. | All boilers | |
| S.98 | Flow/return temperature sensor self-test | The self-test for the flow/return temperature sensor is activated. | All boilers | |
| S.99 | Vaillant self-test | The Vaillant self-test is activated. | All boilers |
WINTER ALERT
Due to the unexpected energy crisis, home energy bills will be sky rocketing this winter, see our Money and Energy Saving page to see if there is anything further that you can do.
Vaillant S Codes New
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