Viessmann VITOFLAME 200 Service Instructions Manual page 20

Troubleshooting
Diagnosis
(cont.)
Fault/system characteristics
Burner starts up, but no oil
injected j
Extraneous light during
p pre−purge phase p g p
Burner starts up and flame is
formed, but burner cuts out ,
after safety time expires
Flame extinguishes during
operation p
Ignition switches on during
operation
Flame pulsates
20
Flashing code Cause of fault
red
at LMO 14
2 × flashes Solenoid coil faulty
DD
2 × flashes Oil pump faulty
DD
2 × flashes Nozzle blocked
DD
4 × flashes Oil pump solenoid valve
DDDD
fails to close
4 × flashes Flame monitor faulty
DDDD
4 × flashes Ignition electrodes
DDDD
incorrectly adjusted or
worn
2 × flashes Flame monitor
DD
contaminated
2 × flashes Flame monitor receives
DD
insufficient light
2 × flashes Flame monitor faulty
DD
2 × flashes Burner control unit faulty
DD
2 × flashes Carbon deposits on flame
DD
tube or on sensor plate
7 × flashes Air in suction line
DDDDDDD
7 × flashes Nozzle faulty
DDDDDDD
7 × flashes Burner incorrectly
DDDDDDD
adjusted
7 × flashes Sensor plate
DDDDDDD
contaminated
7 × flashes Flame monitor
DDDDDDD
contaminated
7 × flashes Sensor plate
DDDDDDD
contaminated
7 × flashes Nozzle contaminated or
DDDDDDD
faulty
Fan pressure too high
Oil consumption too high
Check
Replace solenoid coil
Replace oil pump
Replace nozzle
Replace oil pump
Replace flame monitor
Check ignition electrodes and replace, if
necessary
Clean flame monitor
Clean sensor plate
Replace flame monitor
Replace burner control unit
Clean flame tube
Seal line and filter
Nozzle replacement
Re−instate factory pre−set values
(see page 22)
Clean sensor plate
Clean flame monitor
Clean sensor plate
Nozzle replacement
Check fan pressure via test nipple on top
of fan housing (U−shaped pressure
gauge). Set air damper or blast tube
connection, so that lower value of static
burner pressure (see Standard values
for burner setting", page 22) will not be
exceeded
Correctly adjust oil pressure
(see page 22)