Vaillant S Codes New

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

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