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Vaillant S Codes New

StatuscodeLinkStatusMeaningApplicable to
S.00Heating: No heat de- mandHeating has no heat demand. The burner is off.Heating mode (all models)
S.01Heating mode: Fan start- upThe fan start-up for heating mode is activated.Heating mode (all models)
S.02Heating mode: Pump pre-runThe pump prerun for heating mode is activated.Heating mode (all models)
S.03Heating mode: IgnitionThe ignition for heating mode is activated.Heating mode (all models)
S.04Heating mode: Burner onThe burner for heating mode is activated.Heating mode (all models)
S.05Heating mode: Pump/fan overrunThe pump/fan overrun for heating mode is activated.Heating mode (all models)
S.06Heating mode: Fan over- runThe fan overrun for heating mode is activated.Heating mode (all models)
S.07Heating mode: Pump overrunThe pump overrun for heating mode is activated.Heating mode (all models)
S.08Heating mode: Anti-cyc- ling timeThe anti-cycling time for heating mode is activated.Heating mode (all models)
S.10DHW demandThe domestic hot water demand is activated.Domestic hot water mode (ecotec combination boilers only)
S.11DHW mode: Fan start-upThe fan start-up for domestic hot water mode is activated.Domestic hot water mode (ecotec combination boilers only)
S.13DHW mode: IgnitionThe ignition for domestic hot water mode is activated.Domestic hot water mode (ecotec combination boilers only)
S.14DHW mode: Burner onThe burner for domestic hot water mode is activated.Domestic hot water mode (ecotec combination boilers only)
S.15DHW mode: Pump/fan overrunThe pump/fan overrun for domestic hot water mode is activated.Domestic hot water mode (ecotec combination boilers only)
S.16DHW mode: Fan overrunThe fan overrun for domestic hot water mode is activated.Domestic hot water mode (ecotec combination boilers only)
S.17DHW mode: Pump over- runThe pump overrun for domestic hot water mode is activated.Domestic hot water mode (ecotec combination boilers only)
S.20DHW demandThe domestic hot water demand is activated.Warm start (ecotec combination boilers only) / Charge hot water cylinder (ecotec systems boilers only)
S.21DHW mode: Fan start-upThe 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.22DHW mode: Pump pre- runThe pump prerun for domestic hot water mode is activated.Warm start (ecotec combination boilers only) / Charge hot water cylinder (ecotec systems boilers only)
S.23DHW mode: Ignition Burner onThe ignition for domestic hot water mode is activated.Warm start (ecotec combination boilers only) / Charge hot water cylinder (ecotec systems boilers only)
S.24DHW 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.25DHW mode: Pump/fan overrunThe 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.26DHW mode: Fan overrunThe fan overrun for domestic hot water mode is activated.Warm start (ecotec combination boilers only) / Charge hot water cylinder (ecotec systems boilers only)
S.27DHW mode: Pump over- runThe pump overrun for domestic hot water mode is activated.Warm start (ecotec combination boilers only) / Charge hot water cylinder (ecotec systems boilers only)
S.28DHW anti-cycling timeThe 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.30No heat demand: Con- trollerRoom thermostat blocks heating mode.All boilers
S.31No heat demand: Sum- mer modeSummer mode is activated; there is no heat demand.All boilers
S.32Waiting time deviation: Fan speedThe waiting period for the fan start-up is activated.All boilers
S.34Heating mode: Frost pro- tectionThe frost protection function for heating mode is activated.All boilers
S.39Contact thermostat triggeredThe surface-mounted thermostat or the condensate pump has triggered.All boilers
S.40Comfort protection act- iveThe comfort protection mode is activated.All boilers
S.41Water pressure too highThe system pressure is too high.All boilers
S.42Flue non-return flap closedFlue 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.46Comfort protection: Min- imum load, loss of flame
Comfort protection mode for flame loss at minimum load is activated.All boilers
S.53Waiting time: Water shortageThe 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.54Waiting time: Water shortageProduct is in the waiting period of the operation blocking function as a result of low water pressure (temperature gradient).All boilers
S.57Waiting time: Measuring programThe product is within the waiting period as a result of the measuring programme.
All boilers
S.58Burner modulation limit- ationThe burner modulation limitation is activated.
All boilers
S.61Fault: Incorrect gas typeThe coding resistor on the PCB does not match the entered gas group (see also F.92)All boilers
S.62Adjust CO2Set the CO2 content.All boilers
S.63Fault: Check gas routeA fault message is activated. Check the gas route.All boilers
S.76Service message: Check water pressureA service message is activated. Check the water pressure.All boilers
S.88Purging programme is runningThe purge programme is activated.All boilers
S.92Water circulation volume self-testThe self-test for the water circulation volume is activated.All boilers
S.93Flue gas measurement not possible
Flue gas analysis is not currently possible.All boilers
S.96Return temperature sensor self-testThe self-test for the return temperature sensor is activated.All boilers
S.97Water pressure sensor self-testThe self-test for the water pressure sensor is activated.All boilers
S.98
Flow/return temperature sensor self-testThe self-test for the flow/return temperature sensor is activated.All boilers
S.99Vaillant self-testThe Vaillant self-test is activated.All boilers

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