Viessmann Vitovalor PT2 E11T Installation And Service Instructions Manual page 120

Troubleshooting
Fault messages for gas condensing module
Fault number System characteristics
on the display
F.402 Burner in a fault state
F.403 Burner in a fault state
F.404 Burner in a fault state
F.405 Burner in a fault state
F.406 Burner in a fault state
F.407 Burner in a fault state
F.408 Burner in a fault state
F.409 Burner in a fault state
F.410 Burner in a fault state
F.415 No current electricity meter
values
F.416 Burner locked out
F.417 Burner locked out
F.418 Burner locked out
120
(cont.)
Cause
Lead break, ionisation
voltage, signal 2
Short circuit, dynamic ioni-
sation current, signal 1
Lead break, dynamic ioni-
sation current, signal 1
Short circuit, dynamic ioni-
sation current, signal 2
Lead break, dynamic ioni-
sation current, signal 2
Safety chain
Gas valve, relay 1
Gas valve, relay 2
Internal error, processor
Communication error on
M-bus
Flue gas temperature sen-
sor incorrectly positioned
Short circuit, 24 V power
supply
Lead break, 24 V power
supply
Measures
Check ignition electrodes and con-
necting cables.
Check ionisation electrode and
connecting cable.
Reset burner.
Check ignition electrodes and con-
necting cables.
Check ionisation electrode and
connecting cable.
Reset burner.
Check ignition electrodes and con-
necting cables.
Check ionisation electrode and
connecting cable.
Reset burner.
Check ignition electrodes and con-
necting cables.
Check ionisation electrode and
connecting cable.
Reset burner.
Check ignition electrodes and con-
necting cables.
Check ionisation electrode and
connecting cable.
Reset burner.
Check heating system fill level.
Check circulation pump.
Vent the system.
Reset burner.
Check ignition electrodes and con-
necting cables.
Check ionisation electrode and
connecting cable.
Reset burner.
Check ignition electrodes and con-
necting cables.
Check ionisation electrode and
connecting cable.
Reset burner.
Check ignition electrodes and con-
necting cables.
Check ionisation electrode and
connecting cable.
Reset burner.
Check connection to M-bus gate-
way.
Fit flue gas temperature sensor
correctly (see page 130).
Check connecting lead and supply
voltage to the burner control unit.
Check connecting lead and supply
voltage to the burner control unit.