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Viessmann · Vitodens 050-W
- Viessmann 767Flue-gas temperature is too high.
- Viessmann 799Heating-circuit pump electrical fault; the manual states that the system cannot operate without flow.
- Viessmann 13Lead break, outside temperature sensor.
- Viessmann 14Short circuit, outside temperature sensor.
- Viessmann 57Lead break, room temperature sensor.
- Viessmann 58Short circuit, room temperature sensor.
- Viessmann 73Internal communication error.
- Viessmann 78Communication between heat management unit and programming unit disrupted/interrupted.
- Viessmann 87System pressure too high.
- Viessmann 95OpenTherm remote control not connected.
- Viessmann 104External fault message input active.
- Viessmann 161HBMU heat management unit data memory access fault.
- Viessmann 163Checksum error, data memory access, HBMU heat management unit.
- Viessmann 299Real-time clock fault.
- Viessmann 425Time synchronisation failed.
- Viessmann 471System pressure sensor not available, lead break or short circuit.
- Viessmann 574Room temperature sensor, heating circuit 1 not available.
- Viessmann 575Lead break, room temperature sensor, heating circuit 1.
- Viessmann 576Short circuit, room temperature sensor, heating circuit 1.
- Viessmann 577Room temperature sensor, heating circuit 2 not available.
- Viessmann 578Lead break, room temperature sensor, heating circuit 2.
- Viessmann 579Short circuit, room temperature sensor, heating circuit 2.
- Viessmann 738OpenTherm remote control connected but not configured.
- Viessmann 979Both inputs - plug 96 and OpenTherm - are occupied and reporting a heat demand.
- Viessmann 7474 indicates that system pressure is too low, locking out the burner and stopping central heating and domestic hot water.
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