Viessmann Vitoflame 100 Service Instructions Manual page 18

Troubleshooting
Diagnostics
(cont.)
Fault
Flame extinguishes
during operation
Ignition switches ON
during operation g p
at stage 1
at stage 1
Burner sooty
CO content too low
2
Flue gas temperature too
high
18
Cause
Air in suction line
Nozzle faulty
Air incorrectly adjusted,
pump pressure
incorrectly adjusted
Sensor plate and inside
of flame tube
contaminated
Flame monitor faulty
Flame monitor
contaminated
Flame monitor faulty
Sensor plate or flame
tube contaminated
Too little or too much air Correct setting.
Insufficient chimney
draught
Nozzle faulty
Incorrect setting
Infiltrating air
Oil consumption too
high
Boiler contaminated
with soot
Remedy
Seal line and filter
Nozzle replacement
Adjust pre-settings
correctly (see page 37)
Clean sensor plate and
inside of flame tube
Replace flame monitor
Clean flame monitor
Replace flame monitor
Clean sensor plate or
flame tube
Check and clean
impeller.
Check boiler room
ventilation.
Check flue and flue gas
baffles
Replace nozzle and
install correct nozzle
(see page 37)
Check setting (see
page 37)
Seal flue pipe at boiler
adaptor.
Retighten boiler door
screws and those on
flue outlet.
Match oil flow to rated
output of boiler
Clean boiler and correct
burner settings