Viessmann Vitodens 100 Series Installation And Service Instructions Manual page 67

Fault display
(cont.)
Displayed System character-
fault code istics
F03 Burner in a fault
state
F04 Burner in a fault
state
F05 Burner in a fault
state
F07 Burner locked out
F08 Burner in a fault
state
F10 Continuous opera-
tion
Cause
Flame signal is al-
ready present at
burner start
Flame signal is not
present
Fan does not start
when burner starts
Lead break, water
pressure sensor
Gas solenoid
valve relay
blocked
Short circuit, out-
side temperature
sensor or room
temperature sen-
sor
Troubleshooting
Measures
Check ionisation elec-
trode and connecting ca-
ble.
Turn the ON/OFF switch
off and back on again, or
perform a reset – see
F02.
Check the ignition/ionisa-
tion electrodes and con-
necting cable, check the
gas pressure, check the
gas train, check the igni-
tion and ignition module.
Turn the ON/OFF switch
off and back on again, or
perform a reset – see
F02.
Check the fan motor and
connecting cables
Turn the ON/OFF switch
off and back on again, or
perform a reset – see
F02.
Check the water pres-
sure sensor
Turn the ON/OFF switch
off and back on again
(or reset, see F02).
Check relay, gas sole-
noid valve and connect-
ing lead
Turn the ON/OFF switch
off and back on again, or
perform a reset – see
F02.
Check the sensor (see
page 72).
67