Viessmann VITOLADENS 300-W Installation And Service Instructions Manual page 30

Commissioning, inspection, maintenance
Further details regarding the individual steps
yes
The solenoid
valves open
yes
Flame signal
present
Symbol A
yes
Burner in opera-
tion.
The green LED on
the ignition trans-
former is perma-
nently ON (a
flame is recog-
nised).
For further details regarding faults, see
page 95.
30
no Fault
F4
no Fault
F4
(cont.)
Check the oil sup-
ply; check the sol-
enoid valves
Check ignition
electrodes, elec-
trode gaps and
connecting cables