Viessmann B1HF - Electronics Modules and Fault Message Reference

66
A
B
Fig. 41
A
HBMU heat management unit
B
HMI programming unit with TCU communication
module
Fault messages
Note
For diagnosis and troubleshooting, see chapter
"Repairs".
Fault messages dependent on appliance equipment
level
Troubleshooting
Overview of electronics modules
6167586
Diagnosis