Viessmann Vitovalor PT2 Installation And Service Instructions For Contractors page 127

Fault messages on the gas condensing...
Control unit System characteristics
message
F.380 Burner in a fault state
F.381 Burner in a fault state
F.382 Burner in a fault state
F.383 Burner in a fault state
F.384 Burner in a fault state
F.385 Burner in a fault state
F.386 Burner in a fault state
F.387 Burner in a fault state
F.388 Burner in a fault state
F.395 Burner in a fault state
F.396 Burner in a fault state
F.399 Burner in a fault state
F.400 Burner in a fault state
(cont.)
Cause
Flame is lost immediately
after flame formation (dur-
ing safety time).
Flame loss in the stabilisa-
tion or operating phase
Error counter has excee-
ded limit.
Gas valve does not close.
Gas valve does not close.
Short circuit, signal 1, ioni-
sation current
Lead break, signal 1, ioni-
sation current
Short circuit, signal 2, ioni-
sation current
Lead break, signal 2, ioni-
sation current
Short circuit, flame tem-
perature signal 1
Lead break, flame temper-
ature signal 1
Short circuit, ionisation
voltage, signal 1
Lead break, ionisation
voltage, signal 1
Troubleshooting
Measures
Check gas supply (gas pressure
and gas flow switch).
Check balanced flue system for
flue gas recirculation.
Check ionisation electrode:
Distance to burner gauze assem-
■
bly: See page 79.
Contamination of electrode
■
Reset device.
Check gas supply (gas pressure
and gas flow switch).
Check balanced flue system for
flue gas recirculation.
Check ionisation electrode:
Distance to burner gauze assem-
■
bly: See page 79.
Contamination of electrode
■
Reset device.
Reset device.
Check the gas train, replace if nec-
essary.
Reset device.
Check the gas train, replace if nec-
essary.
Reset device.
Check ionisation electrode and
connecting cable.
Reset device.
Check ionisation electrode and
connecting cable.
Reset device.
Check ionisation electrode and
connecting cable.
Reset device.
Check ionisation electrode and
connecting cable.
Reset device.
Check ionisation electrode and
connecting cable.
Reset device.
Check ionisation electrode and
connecting cable.
Reset device.
Check ionisation electrode and
connecting cable.
Reset device.
Check ionisation electrode and
connecting cable.
Reset device.
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