Viessmann Vitocrossal 100 CI1, Инструкции по обслуживанию для подрядчиков

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74
Fault code dis-
played System characteristics Cause Measures
DE Control mode without room
influence Lead break, room temper-
ature sensor, heating cir-
cuit 2 (with mixer) Check room temperature sensor
for heating circuit 2 and the remote
control settings.
DF Control mode without room
influence Lead break, room temper-
ature sensor, heating cir-
cuit 3 (with mixer) Check room temperature sensor
for heating circuit 3 and the remote
control settings.
E0 Control mode External LON subscriber
error Check connections and LON sub-
scribers.
E1 Burner in a fault state Ionisation current too high
during calibration Check gap between ionisation
electrode and burner gauze as-
sembly (see page 21).
In open flue operation, prevent
high levels of dust in the combus-
tion air.
Press reset button
R .
E3 Burner in a fault state Heat transfer too low dur-
ing calibration.
Temperature limiter has
shut down. Ensure adequate heat transfer.
Press reset button
R .
E4 Burner blocked 24 V power supply fault Replace control unit.
E5 Burner blocked Flame amplifier fault Replace control unit.
E7 Burner in a fault state Ionisation current too low
during calibration Check ionisation electrode for the
following:
■
Distance to burner gauze assem-
bly (see page 21)
■
Contamination on electrode
■
Connecting cable and plug-in
connections
Check flue system; remove flue
gas recirculation if required.
Press reset button
R .
E8 Burner in a fault state Ionisation current lies out-
side the permissible range Check gas supply (gas pressure
and gas flow switch), gas train and
connecting cable.
Check ionisation electrode for the
following:
■
Distance to burner gauze assem-
bly (see page 21)
■
Contamination on electrode
Press reset button R .
EA Burner in a fault state Ionisation current not with-
in permissible range dur-
ing calibration (excessive
deviation from previous
level) Check flue system; remove flue
gas recirculation if required.
In open flue operation, prevent
high levels of dust in the combus-
tion air.
Press reset button
R .
Following several unsuccessful re-
set attempts, replace the coding
card and press reset button
R .
Troubleshooting
Fault codes
(cont.)
5792 925 GB
Diagnosis