Viessmann VITODENS 222-F Installation And Service Instructions Manual page 84

Troubleshooting
Fault messages
(cont.)
Fault number System characteristics
on the display
F.430 Connection of automation
modules not possible
F.432 Burner locked out if fault con-
tinues to occur
F.433 Burner locked out if fault con-
tinues to occur
F.440 Burner locked out
F.441 Burner locked out
F.442 Burner locked out
F.443 Burner locked out
F.444 Burner locked out
F.445 Burner locked out
F.446 Burner in a fault state
F.447 Burner in a fault state
F.448 Burner in a fault state
F.449 Burner in a fault state
F.450 Burner in a fault state
F.451 Burner in a fault state
F.452 Burner in a fault state
F.453 Burner in a fault state
F.454 Burner in a fault state
84
Cause
Communication error
gateway
Short circuit, fan speed
signal
Lead break, fan speed
signal
Short circuit gas pressure
switch on EM-EA1 exten-
sion (DIO electronics
module)
Lead break gas pressure
switch on EM-EA1 exten-
sion (DIO electronics
module)
Short circuit signal, flue
gas damper at EM-EA1
extension (DIO electronics
module)
Lead break signal, flue
gas damper connection at
EM-EA1 extension (DIO
electronics module)
Short circuit, LPG safety
valve (solenoid valve) sig-
nal at EM-EA1 extension
(DIO electronics module)
Lead break, LPG safety
valve (solenoid valve) sig-
nal at EM-EA1 extension
(DIO electronics module)
Deviation, flow tempera-
ture sensor/high limit safe-
ty cut-out, heat generator
Deviation, ionisation volt-
age signal
Deviation, ionisation cur-
rent signal
Error in scheduled pro-
gram run monitoring
Error in scheduled pro-
gram run monitoring
Error in scheduled pro-
gram run monitoring
Error in scheduled pro-
gram run monitoring
Synchronisation error, se-
quence
Incorrect software version
Measures
Check gateway module connecting
cable and power supply.
Check ventilation air supply; clean
if necessary. Check the fan and
connecting cable.
Check ventilation air supply; clean
if necessary. Check the fan and
connecting cable.
Check gas pressure switch con-
nection at EM-EA1 extension (DIO
electronics module).
Check gas pressure switch con-
nection at EM-EA1 extension (DIO
electronics module).
Check flue gas damper connection
at EM-EA1 extension (DIO elec-
tronics module).
Check flue gas damper connection
at EM-EA1 extension (DIO elec-
tronics module).
Check solenoid valve connection
at EM-EA1 extension (DIO elec-
tronics module).
Check solenoid valve connection
at EM-EA1 extension (DIO elec-
tronics module).
Check the flow temperature sen-
sor/high limit safety cut-out. See
page 91.
Reset the appliance.
Check ionisation electrode.
Reset the appliance.
Check ionisation electrode.
Reset the appliance.
Reset the appliance.
Reset the appliance.
Reset the appliance.
Reset the appliance.
Reset the appliance.
Flash the correct software version
for the burner control unit (BCU).