Overview Of Electronics Module; Fault Messages - Viessmann Vitodens 200-W B2HE Installation And Service Instructions Manual

Overview of electronics module

A
B
C
Fig. 49
BCU burner control unit
A
HMU heat management unit
B
C HMI programming unit with RF module

Fault messages

Fault number System characteristics
on the display
F.7 No DHW heating
F.8 No DHW heating
F.9 No DHW heating
F.10 No DHW heating
F.11 No solar DHW heating or
central heating backup
F.12 No solar DHW heating or
central heating backup
F.13 Regulates as if the outside
temperature were 0 °C.
Cause
Lead break, cylinder tem-
perature sensor
Short circuit, cylinder tem-
perature sensor
Lead break, DHW outlet
temperature sensor
Short circuit, DHW outlet
temperature sensor
Lead break, collector tem-
perature sensor
Short circuit, collector
temperature sensor
Lead break, outside tem-
perature sensor
Troubleshooting
Measures
Check cylinder temperature sen-
sor. See page 99.
Check cylinder temperature sen-
sor. See page 99.
Check the DHW outlet temperature
sensor. See page 99.
Check the DHW outlet temperature
sensor. See page 99.
Check collector temperature sen-
sor TS2 on extension EM-S1
(ADIO electronics module). See
page 101.
Check collector temperature sen-
sor TS2 on extension EM-S1
(ADIO electronics module). See
page 101.
Check outside temperature sensor.
See page 99.
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