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Viessmann · Vitodens 100-W heat-only
- Viessmann 50Flue-gas temperature sensor short circuit.
- Viessmann 59Undervoltage or power-supply fault; the burner is locked out, so there is no heating or domestic hot water.
- Viessmann 62The high-limit safety cut-out responded.
- 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 91DIO electronics module communication error.
- Viessmann 92ADIO electronics module communication error.
- Viessmann 95OpenTherm remote control not connected.
- Viessmann 100PlusBus voltage error.
- Viessmann 103Internal communication error, programming unit.
- 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 425Time synchronisation failed.
- Viessmann 471System pressure sensor not available, lead break or short circuit.
- Viessmann 517Lead break, PlusBus cable, incorrect appliance address set, remote control faulty.
- Viessmann 738OpenTherm remote control connected but not configured.
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