Calling Up Fault Codes From The Fault Memory (Fault History) - Viessmann VITOTRONIC 100 Installation And Service Instructions Manual

Checking and acknowledging faults
Fault code System character-
istics
58 Cylinder primary
pump ON:
Set cylinder tem-
perature = Set boil-
er water
temperature, priority
control is cancelled
b1 Control mode
b4 Emissions test
mode
b5 Control mode
b6 Constant mode
b7 The boiler is regu-
lated by the control
thermostat
b9 Control mode
d1 Boiler cools down

Calling up fault codes from the fault memory (fault history)

The 10 most recent faults are saved
and may be scanned.
Faults are sorted by date. The most
recent fault is thus fault number 1.
(cont.)
Cause Measures
Cylinder tempera- Check cylinder tempera-
ture sensor lead ture sensor
broken (see page 50)
Communication Check connections and
error, program- replace the program-
ming unit ming unit, if required
Internal fault Check electronics PCB
Internal fault Check electronics PCB
Invalid hardware Check main PCB
recognised
Boiler coding card Plug in boiler coding
card or replace, if faulty
Internal fault Acknowledge fault, re-
peat data input
Burner fault Check the burner
1. Press G and d simultaneously
for approx. 2 s.
2. Call up individual fault codes with
b/ b.
3. Note
All saved fault codes can be
deleted with e.
Press d.
Troubleshooting
29