Viessmann Vitodens 200-W B2HE Installation And Service Instructions Manual page 90

Troubleshooting
Fault messages
(cont.)
Fault number System characteristics
on the display
F.400 Burner in a fault state
F.401 Burner in a fault state
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.410 Burner in a fault state
F.416 Burner blocked
F.417 Burner in a fault state
F.418 Burner blocked
F.425 System in control mode, cal-
culation out of operation
F.426 Burner in a fault state
F.427 Burner in a fault state
F.428 Control mode
F.429 Control mode
90
Cause
Lead break, ionisation
voltage, signal 1
Short circuit, ionisation
voltage, signal 2
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 monitoring re-
lay 1 has responded
Internal error, processor,
BCU burner control unit
Flue gas temperature sen-
sor incorrectly positioned
Short circuit, 24 V power
supply
Lead break, 24 V power
supply
Time synchronisation
failed.
Short circuit, external un-
lock signal
Lead break, external un-
lock signal
Short circuit, air mass
sensor, fan unit
Lead break, air mass sen-
sor, fan unit
Measures
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 heating system fill level.
Check circulation pump.
Vent the system.
Reset device.
Reset device.
Reset device.
Fit flue gas temperature sensor
correctly. See "Repairs".
Check connecting cable and sup-
ply voltage to the BCU burner con-
trol unit.
Reset device.
Check connecting cable and sup-
ply voltage to the BCU burner con-
trol unit.
Reset device.
Set the time. If external time is
used, check parameters 1504 and
508.
Check the connection to the HMU
heat management unit.
Reset device.
Check the connection to HMU heat
management unit.
Reset device.
Check connecting cable and plug-
in connector.
Check connecting cable and plug-
in connector.