What does Fault Code bd mean on my Viessmann B2TF?
If your Viessmann Boiler displays Fault Code bd, there is a communication error with the remote control Vitotrol for heating circuit 2 (with mixer). Check connections, lead, coding address "A0", and remote control settings.
What does Fault Code bE mean on my Viessmann B2TF?
If your Viessmann Boiler displays Fault Code bE, there is a communication error with the remote control Vitotrol for heating circuit 3 (with mixer). Check connections, lead, coding address "A0", and remote control settings.
What does Fault Code Cd mean on my Viessmann B2TF Boiler?
If your Viessmann Boiler displays Fault Code Cd, there is a communication error with Vitocom 100 (KM BUS). Check connections, Vitocom 100 and coding address "95".
What does Fault Code C5 mean on my Viessmann B2TF Boiler?
If your Viessmann Boiler displays Fault Code C5, there is a communication error with the variable speed internal pump. Check the setting of coding address "30".
What does Fault Code C6 mean on my Viessmann B2TF?
If your Viessmann Boiler displays Fault Code C6, there is a communication error with the external variable speed heating circuit pump for heating circuit 2 (with mixer). Check the setting of coding address "E5".
What does Fault Code C7 mean on my Viessmann Boiler?
If your Viessmann Boiler displays Fault Code C7, there is a communication error with the external variable speed heating circuit pump for heating circuit 1 (without mixer). Check the setting of coding address "E5".
What does Fault Code bF mean on my Viessmann Boiler?
If your Viessmann Boiler displays Fault Code bF, the LON communication module is incorrect. Replace the LON communication module.
What does Fault Code CF mean on my Viessmann B2TF Boiler?
If your Viessmann Boiler displays Fault Code CF, there is a communication error with the LON communication module. Replace the LON communication module.
What does Fault Code C1 mean on my Viessmann B2TF Boiler?
If your Viessmann Boiler displays Fault Code C1, there is a communication error with extension EA1. Check connections.
What does Fault Code C3 mean on my Viessmann B2TF Boiler?
If your Viessmann Boiler displays Fault Code C3, there is an extension AM1 communication error. Check connections.
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