Vaillant VC 156/5-7 Operating Instructions Manual

Also see for VC 156/5-7: Installation and maintenance instructions

Contents

Appendix0020189874_03 ecoTEC exclusive Operating instructions 15Status code Parameter MeaningS.36 Target value for ext. controller lower than 20 °C Reference setting for continuous controller 7-8-9 oreBUS controller is < 20°C and blocks the heating modeS.37 Waiting time: Deviation in fan speed Waiting time: Fan failure in operationS.39 Contact thermostat triggered "Burner off contact" has responded (e.g. contact thermo-stat or condensate pump)S.40 Comfort protection active Comfort protection mode is active: Product running withlimited heating comfortS.41 Water pressure too high Water pressure > 2.8 barS.42 Flue non-return flap closedFlue non-return flap response blocks burner operation(only in conjunction with accessory VR40) or condensatepump defective; heat requirement is blockedS.46 Comfort protection: Minimum load, loss of flame Comfort protection mode, flame loss at minimum loadS.53 Waiting time: Water shortageProduct is within the waiting period of the modulationblock/operation block function as a result of low waterpressure (flow/return spread too large)S.54 Waiting time: Water shortageProduct is within the waiting period of the operationblocking function as a result of low water pressure(temperature gradient)S.55 Waiting time: CO sensor Waiting time: CO sensorS.56 Waiting time: CO limit value exceedance Waiting time: CO limit value exceedanceS.57 Waiting time: Measuring program Calibration unsuccessful. Waiting period, comfort safetymodeS.58 Burner modulation limitation Modulation limitation due to noise/windS.59 Waiting time: Water circulation vol. Minimum circulation water volumeS.76 Service message: Check water pressure System pressure too low. Top up water.S.85 Service message: Check water circulation volume Service message: Check water circulation volumeS.86 Service message: Check vortex sensor Service message: Check vortex sensorS.87 Service message: Check differential pressure sensor Service message: Check differential pressure sensorS.88 Purging programme is running Purging programme is runningS.92 Water circulation volume self-test Water circulation volume self-testS.93 Flue gas measurement not possible Flue gas measurement not possible because not allmeasuring programs have yet runS.96 Return temperature sensor self-test Return sensor test running, heating demands areblocked.S.97 Water pressure sensor self-test Water pressure sensor test running, heating demandsare blocked.S.98 Flow/return temperature sensor self-test Flow/return sensor test running, heating demands areblocked.S.99 Vaillant self-test Self-testS.105 Unit not purged Unit not purged (D.130 = 0: No bypass valve)

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