Viessmann VITOSOL 200 Operating instructions

Service instructions
for heating engineers
Vitoflame 200
Oil pressure jet burner (typeVEK)
Hup to 40 kW with oil pre−heater
Hfrom 50 kW without oil pre−heater
Vitorond200 and Vitorond222
See notes on applicability, page2.
VITOFLAME 200
Vitoflame 200 oil burner
fitted to Vitorond200
5692452 GB2/2002 File in: Service folder

General Information
2
Safety instructions
Please follow these safety instructions closely to prevent accidents and material losses.
Work on the equipment
Installation, initial start−up,
maintenance and repairs must only
be carried out by a competent
person (heating engineers/
installation contractors) (EN50110,
part1, and VDE1000, part10, or
local regulations).
Before working on the equipment/
heating system, isolate the mains
electrical supply (e.g. by removing a
separate mains fuse or by means of
a mains electrical isolator) and
safeguard against unauthorised
reconnection.
Disconnection must be carried out
by means of an isolating device
which simultaneously isolates all
non−earthed conductors with at least
3 mm contact separation.
Work requiring the control unit to be
opened must not subject internal
components to electrostatic
discharges.
Repair work
It is not permitted to carry out
repairs on parts that fulfil a safety
function.
Use only original Viessmann spare
parts or equivalent which have been
approved by Viessmann.
Initial start−up
This must be carried out by the
system installer or a commissioning
engineer designated by him; all
actual values should be recorded in a
commissioning/service report.
Instructing the system user
The system installer must hand the
operating instructions to the system
user and instruct him/her in the
operation of the system.
This symbol is a reference
to other instructions which
must be observed.
Applicability
Applicable to burners from serial no.:
7159805200001kkk,
7159806200001kkk,
7159807200001kkk,
7159808200001kkk,
7159809200001kkk,
7159810200001kkk,
7159811200001kkk,
7159812200001kkk
Operating and service documents
1. Complete and separate the
customer registration card:
HHand the system user section
to the user for safekeeping.
HKeep the heating engineer
portion.
2. File all parts lists, operating and
service instructions in the folder
and hand over to the system user.
5692452 GB

Contents
3
Page
General Information Safety instructions2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Applicability2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating and service documents2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Initial start−up,
inspection and maintenance
Procedure summary4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Implementation5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Burner control unit15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Troubleshooting Procedure summary18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Diagnosis19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Additional information Specification22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Standard values for burner settings22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Component summary23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wiring diagram25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts list27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Commissioning/service report31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Index 32. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5692452 GB

Initial start−up, inspection and maintenance
4
Procedure summary
Initial start−up steps
Steps for biannual inspection
Maintenance steps
I1. System start−up Page 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
I M 2. Oil pressure adjustment and vacuum check Page 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
I M 3. Air volume fine adjustment Page 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
I M 4. Checking the burner Page 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
IM5. Flame monitor check Page 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
IM6. Heating system shutdown Page 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
I M 7. Checking the electrical connections Page 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
M8. Cleaning the burner Page 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
IM9. Checking the impeller fixings Page 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
IM10. Checking the flame tube fixings Page 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
M11. Nozzle replacement Page 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
I M 12. Checking and adjusting the ignition electrodes Page 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
M13. Burner cover installation on the burner housing Page 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
M14. Cleaning or, if necessary, replacing the oil pump filter Page 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
M15. Pre−filter element replacement Page 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
I M 16. System start−up Page 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
IM17. Checking all oil pipes and connections for leaks Page 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
M18. Re−checking the burner Page 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5692452 GB

Initial start−up, inspection and maintenance
5
Implementation
To obtain the optimum combustion values, it is essential to adjust the burner
with the boiler heated to operating temperature.
Check the CO content, CO2content, flue gas temperature, room temperature
and chimney draught after 2minutes operation and at 60 ºC boiler water
temperature with fitted burner hood.
Remove the burner hood before commencing maintenance work.
1. System start−up
Initial start−up
Service instructions
Boiler control unit
Please note:
Vitoflame 200 oil burners have
excellent combustion values which
are achieved without the use of fuel
oil additives to improve combustion.
We do not therefore recommend the
use of such combustion improvers.
1. Check whether the flame tube
attachment (for 15 to 33 kW
output) has been fitted.
2. Check the heating system
pressure and the oil level in the
tank.
3. Open the shut−off valves in the oil
supply lines on the oil tank and on
the filter.
4. Fill the oil suction line and filter
with fuel oil using the manual oil
suction pump before switching on
the burner.
5. Switch on the mains electrical
isolator (outside the boiler room).
6. Switch on system On/Off
switchBon the control unit.
If fault indicator lampAon the
control unit illuminates, press reset
buttonCon the burner.
Please note:
For Vitorond 222:
For balanced flue operation the air
supply duct should be fitted before
burner setup. Observe the following
values during this step:
HPressure loss in the air supply duct
max. 35 Pa,
HAir inlet temperature in the inlet
adaptor min. 5°C/max. 30°C.
5692452 GB

Initial start−up, inspection and maintenance
6
Implementation (cont.)
2. Oil pressure adjustment and vacuum check
Maint.Initial start−up
Please note:
The oil pressure is preset at the factory according to the oil throughput.
Adjust the oil pressure, if necessary.
1. Isolate the mains electricity
supply and safeguard against
reconnection.
2. Unscrew drain plug"P" Afrom
the oil pump.
3. Unscrew drain plug"V" Bfrom
the oil pump.
Please note:
This allows the oil to drain from
the oil pump.
Danfoss oil pump, typeBFP21
4. Insert a pressure gauge (range
025bar) and a vacuum gauge
(range 01bar); seal the gauges
only with copper or aluminium
rings or O−rings.
Please note:
Do not use tape to seal these
joints.
5. Start up the burner. The solenoid valve opens.
6. Read off the oil and vacuum
pressures of the pump on the
relevant gauges (vacuum should
be max. 0.35bar given a head of
3 m between the oil pump and
the bottom of the tank).
Where the vacuum measures
higher than 0.35bar, check the
filter for cleanliness or the pipe
run.
7. If necessary, set the oil pressure
on oil pump pressure setting
screw C(for Danfoss pumps:
depending on the model either on
the front or the side).
Turning clockwise³pressure
increases
Turning anti−clockwise³pressure
decreases.
Please note:
For standard values for burner
settings, see page22.
Suntec oil pump, typeAL35
8. Check the emission values after
checking the oil pressure.
9. Isolate the mains electricity
supply and safeguard against
reconnection.
10. Remove the pressure and
vacuum gauges.
11. Insert drain plugs"P" A
and"V" B.
Please note:
Check the plug seal rings
for possible damage and replace,
if necessary.
12. Start up the burner and
check the plugs for leaks.
5692452 GB

Initial start−up, inspection and maintenance
7
Implementation (cont.)
3. Air volume fine adjustment
Maint.Initial start−up
Please note:
The oil pressure is preset at the factory. Re−adjust the air volume if necessary.
Starting up the burner may require a fine adjustment.
AAir damper
BTest nipple
CBlast tube connection setscrew
DBlast tube connection
ETerminal screw
FSensor plate
GFlame tube
1. Modify the sensor plate position
inside the flame tube. To do this,
turn the blast tube connection
setscrewC:
HAnti−clockwise³greater
cross−section³more air,
Hclockwise³smaller cross
section³less air.
Please note:
For standard values for burner
settings, see page22.
2. Check the static burner pressure at
test nippleB.
3. Check the emission values by
measurement.
Please note:
Do not slacken sealed clamping
screw E, otherwise the zero point of
the blast tube connection will be
altered.
5692452 GB

Initial start−up, inspection and maintenance
8
Implementation (cont.)
4. Checking the burner
Maint.Initial start−up
Record all test values in the order of
the commissioning/service report on
the penultimate page of this manual.
Please note:
The flue pipe must be sealed on
the boiler adaptor. Infiltrating air
leads to false readings.
5. Flame monitor check
Inspection Maint.
1. Pull flame monitorAfrom
flangeB.
2. Clean the flame monitor.
Safety check Response
Burner start with darkened flame monitor Fault shutdown at the end of
the safety period
Burner start with flame monitor lit from
an outside source
Fault shutdown not later than
after 40 sec.
3. Push flame monitorA into
flange B, until strap C
noticeably clicks into place.
Please note:
Observe the angle and distance.
Safety check Response
Burner operation with simulated flame
interruption: to do this pull plug Dfrom
the solenoid valve during operation and
leave in this condition.
Restart followed by fault
shutdown at the end of the
safety period
ESight glass of the flame monitor
FStrap centering tab
6. System shutdown
Inspection Maint.
1. Isolate the mains electricity supply
and safeguard against
reconnection.
2. Pull plug−connectorfA from the
burner.
3. Close the oil supply line (oil filter
valve).
5692452 GB
.
.

Initial start−up, inspection and maintenance
9
Implementation (cont.)
7. Checking the electrical connections
Inspection Maint.
Check the plug−connections on the
burner components and the cable
bushes for tight fit.
8. Cleaning the burner
Maint.
1. Burner in the maintenance
position.
2. Clean the housingand the flame
tube, sensor plateA, ignition
electrodesB, flame monitorC
and impellerD.
Cleaning the combustion
chamber and hot gas flues,
see service instructions.
5692452 GB

Initial start−up, inspection and maintenance
10
Implementation (cont.)
9. Checking the impeller fixings
Inspection Maint.
See maintenance item8.
10. Checking the flame tube fixings
Inspection Maint.
Please note:
The flame tube must be finger
tight.
5692452 GB

Initial start−up, inspection and maintenance
11
Implementation (cont.)
11. Nozzle replacement
Maint.
1. Plug the burner chassis, with the
blast tube connection pointing
upwards, onto the burner housing.
Please note:
This avoids air−locks being created
when replacing nozzles.
2. Pull flame monitorDfrom its
retainer.
3. Release screwCby two full
turns.
4. Remove sensor plateAfrom the
blast tube connection.
5. Unscrew nozzleF(whilst holding
the blast tube connection).
6. Insert the replacement nozzle
(whilst holding the blast tube
connection).
Please note:
For make and type of nozzle, see
standard values for burner
settings, page22.
7. Only for 15 to 33 kW:
Check seal ringBon deflectorE
of the sensor plate and apply
instrument grease; replace the
seal ring, if necessary.
8. Push sensor plateAonto the
blast tube connection up to the
end−stop of the oil pre−heater and
re−tighten fixing screwC.
9. Push flame monitor Dinto its
retainer.
Please note:
The flame monitor, type QRB,
should be positioned at the sensor
plate (see page 8).
5692452 GB
15 to 33 kW
40 kW
50 and 63 kW

Initial start−up, inspection and maintenance
12
Implementation (cont.)
12. Checking and adjusting the ignition electrodes
Inspection Maint.
15 up to 33kW
40 up to 63kW
Check ignition electrodesAfor
wear and size (see fig.) and replace,
if necessary.
13. Burner chassis installation on the burner housing
Maint.
5692452 GB
.
.
.
.
..
.
.
.
.

Initial start−up, inspection and maintenance
13
Implementation (cont.)
14. Cleaning or, if necessary, replacing the oil pump filter
Maint.
Danfoss oil pump
typeBFP21
1. Unscrew filter plugAfrom the
pump cover with a 4mmAllen key.
2. Remove plugAwith cartridge
filterC.
3. Carefully disconnect filterCfrom
plugA with a screwdriver.
4. Change theO−ringBon plugA.
5. Push the new filter onto plugA.
6. Insert the plug and filter into the
oil pump.
Suntec oil pump, typeAL35
1. Unscrew the four screws from the
pump housing and remove the
cover.
2. Subject to the level of
contamination, flush out the oil
pump filterAwith clean fuel oil
or replace the filter.
3. During re−assembly, renew flat
gasketBof coverDand
OringsCfor the plug.
15. Replacing the pre−filter element
Maint.
Check the Oring, which seals the
filter cup, for possible damage and
replace, if necessary.
5692452 GB

Initial start−up, inspection and maintenance
14
Implementation (cont.)
16. System start−up
Inspection Maint.
1. Open the oil filter valve.
2. Switch on the mains electrical
isolator (outside the boiler room).
3. Switch on the system On/Off
switch on the control unit.
17. Checking the oil pipes and connections for leaks
Inspection Maint.
The presence of air bubbles in the
prefilter is a sign of a leak in the
suction line. Check oil pipes and
connecting pipes on the oil tanks.
Leaks will cause the fuel oil to
continue to be injected (run−on) and
produce soot deposits on the sensor
plate and on the flame tube
attachment.
18. Re−checking the burner
Maint.
Record all test values in the order of
the commissioning/service report on
the penultimate page of this manual.
Please note:
The flue pipe must be sealed on
the boiler adaptor. Infiltrating air
leads to false readings.
5692452 GB

Initial start−up, inspection and maintenance
15
Burner control unit
You may use the following burner
control units with this burner:
Burner control unit LOA 14.171B2V
For programming sequence, see the
wiring diagram on page 25.
Sensor current:
Hmin. requirement 50 µA
Hmax. permissible without flame
5.5µA
Undervoltage
When the mains voltage falls below
165 V~, the burner will be prevented
from starting or the oil flow will be
interrupted; simultaneously the
system will be initiating a fault
shutdown.
Fault position
A lamp in the reset button also
indicates the fault shutdown of the
burner control unit.
Burner control unit LMO 14.113A2
For programming sequence, see the
wiring diagram on page 25.
Sensor current:
Hmin. requirement 40 µA
Hmax. permissible without flame
5.5µA
Undervoltage
If the mains voltage falls below
165V~ the burner control unit
initiates a safety shutdown.
The system re−starts when the mains
voltage rises again above approx.
175 V~.
Please note:
If the power supply is 2×127 V and a
red flashing code: 10×flashing (see
page 19) refer to your local
Viessmann sales office.
Controlled intermittent operation
After a maximum of 24 hours
non−stop operation, the burner
control unit implements an
automatic safety shutdown with
subsequent re−start.
Control sequence in case of faults
The fuel valve outputs and the
ignition system are immediately shut
down (< 1 s) if the system shuts
down because of faults.
Cause Response
After mains power failure Re−start
After falling below the undervoltage level Re−start
In case of premature, faulty flame signal during the
pre−flush time t1
Fault shutdown at the end of the pre−flush time
t1
In case of premature, faulty flame signal during the
oil pre−heat time t0
Starting will be inhibited after a maximum of
40sec. fault shutdown
If the burner does not light within the safety limit t2 Fault shutdown at the end of the safety period t2
If the flame fails during operation Max. 3 start repeats, then fault shutdown
No heating or oil pre−heater enabling within 10 min. Fault shutdown
System creates a fault shutdown
After a fault shutdown, the burner
control unit remains locked out
(non−modifiable fault shutdown) and
the red lamp illuminates.
This state is also maintained after
the mains power supply has failed.
Resetting the boiler control unit
The system can be immediately reset
after a fault shutdown. Hold down
the reset button for approx. 1 sec.
(<3 s).
Ignition sequence
The system is re−ignited, if the flame
fails within the safety period,
however not later than at the end of
the safety period. This allows several
ignition attempts within the safety
period, see program sequence on
page 25.
Repeat restriction
The system may be re−ignited up to
3times, if the flame fails during
operation. The fourth flame failure
during operation triggers a fault
shutdown. The count of these
repeats begins with every controlled
switch−on (through temperature or
pressure regulators, thermostat or
pressure limiters or safety limiters).
5692452 GB

Initial start−up, inspection and maintenance
16
Burner control unit (cont.)
Burner control unit LMO 14.113A2 (cont.)
Operating controls
The reset button "ET" is
the central control for
resetting the system
and for activating and
deactivating the
diagnostic system.
The multi−coloured
signal lamp "LED" is
the central display
element for the visual
diagnosis as well as the
interface diagnosis.
Both elements ("ET" and "LED") are
located under the clear cover of the
reset button.
Visual diagnosis
Operational display or fault cause
diagnosis
During normal operation the various
conditions are indicated by colour
code acc. to the following colour
code table.
Colour code table
Condition Colour code Colour
Oil pre−heater active, oil pre−heat
time t0
\\\\\\\\\\\\\yellow
Ignition phase, ignition activated \0\0\0\0\0\0\yellow off
Operation, flame OK JJJJJJJJJJJJJJgreen
Operation, poor flame J0J0J0J0J0J0Jgreen off
Undervoltage \Y\Y\Y\Y\Y\Y\yellow red
Fault, alarm YYYYYYYYYYYYYYred
Fault code output Y0Y0Y0Y0Y0Y0Yred off
Extraneous light before burner start JYJYJYJYJYJYJYgreen red
Interface diagnosis YYYYYYYYYYYYYYred flickering light
Legend:
0off
\yellow
Jgreen
Yred
5692452 GB
red
yellow
green

Initial start−up, inspection and maintenance
17
Burner control unit (cont.)
Burner control unit LMO 14.113A2 (cont.)
Diagnosis of fault causes
After a fault shutdown the red signal
lamp is constantly on. In this state,
the visual diagnosis of fault causes
can be activated in accordance with
the fault code table, by activating the
reset button >3 s.
The diagnosis of fault causes is
activated as follows:
5692452 GB
on
Fault setting Fault setting
Visual diagnosis
flashing
Fault code table
reset

Troubleshooting
18
Procedure summary
Diagnosis 1. Establish faults/ascertain system behaviour
2. Look for the corresponding cause of the fault in the diagnosis tables
3. Establish the action required from the table
Remedy 4. Correct the fault
5692452 GB

Troubleshooting
19
Diagnosis
Fault/system characteristics Flashing code
red
at LMO14
Cause of fault Check
Burner does not start (no fault
display), signal lamp does not
illuminate
No voltage Check fuse or connectoraBÖ in control
unit, or check electrical connections,
setting of heating system on/off switch
on control unit and mains electrical
isolator
High limit safety cut−out
activated
Press reset button on boiler control unit
Burner does not start (no fault
display), signal lamp
illuminates
10× flashes
DDDDDDDDDD
Faulty electrical
connection, wires"L1"
and "N" interchanged or
faulty burner control unit
Check electrical connection
If phases are correctly connected,
replace burner control unit
Burner does not start up (with
fault)
2× flashes
DD
Motor faulty Replace motor
2× flashes
DD
Coupler between motor
and oil pump faulty
Replace coupler
2× flashes
DD
Oil pump seized or stiff Clean or, if necessary, replace oil pump
8× flashes
DDDDDDDD
Oil pre−heater faulty Replace oil pre−heater
Burner starts up, but no flame
is formed
2× flashes
DD
Ignition electrodes
incorrectly adjusted
Adjust correctly (see page12)
2× flashes
DD
Ignition electrodes damp
and contaminated
Clean ignition electrode block
2× flashes
DD
Insulation of ignition
electrode cracked
Replace ignition electrode block
2× flashes
DD
Ignition transformer faulty Replace ignition transformer
2× flashes
DD
Ignition cable faulty Replace ignition cable
2× flashes
DD
Pump does not feed oil Install pressure and vacuum gauges on
pump and check build−up of pressure
(see following paragraph)
Pump does not feed oil 2× flashes
DD
Shut−off valves closed at
filter or in oil pipe
Open valves
2× flashes
DD
Filter blocked Clean filter (pre−filter and pump filter)
2× flashes
DD
Coupler between motor
and pump faulty
Replace coupler
2× flashes
DD
Leak in suction line or
filter cup
Tighten connections
Check oil pipes and connections for leaks
and tighten if necessary
2× flashes
DD
Oil flow and return hoses
interchanged
Connect correctly acc. to instructions on
pump
2× flashes
DD
Vacuum in suction line too
high (higher than 0.35bar)
Check cross−section of oil pipes. Replace
filter
Check external fuel oil valve
2× flashes
DD
External fuel oil valve
faulty
Check and, if necessary, replace external
oil valve
5692452 GB

Troubleshooting
20
Diagnosis (cont.)
Fault/system characteristics Flashing code
red
at LMO14
Cause of fault Check
Burner starts up, but no oil
injected
2× flashes
DD
Solenoid coil faulty Replace solenoid coil
j
2× flashes
DD
Oil pump faulty Replace oil pump
2× flashes
DD
Nozzle blocked Replace nozzle
Extraneous light during
pre−purge phase
4× flashes
DDDD
Oil pump solenoid valve
fails to close
Replace oil pump
ppgp
4× flashes
DDDD
Flame monitor faulty Replace flame monitor
4× flashes
DDDD
Ignition electrodes
incorrectly adjusted or
worn
Check ignition electrodes and replace, if
necessary
Burner starts up and flame is
formed, but burner cuts out
2× flashes
DD
Flame monitor
contaminated
Clean flame monitor
,
after safety time expires 2× flashes
DD
Flame monitor receives
insufficient light
Clean sensor plate
2× flashes
DD
Flame monitor faulty Replace flame monitor
2× flashes
DD
Burner control unit faulty Replace burner control unit
2× flashes
DD
Carbon deposits on flame
tube or on sensor plate
Clean flame tube
Flame extinguishes during
operation
7× flashes
DDDDDDD
Air in suction line Seal line and filter
p
7× flashes
DDDDDDD
Nozzle faulty Nozzle replacement
7× flashes
DDDDDDD
Burner incorrectly
adjusted
Re−instate factory pre−set values
(see page22)
7× flashes
DDDDDDD
Sensor plate
contaminated
Clean sensor plate
Ignition switches on during
operation
7× flashes
DDDDDDD
Flame monitor
contaminated
Clean flame monitor
7× flashes
DDDDDDD
Sensor plate
contaminated
Clean sensor plate
7× flashes
DDDDDDD
Nozzle contaminated or
faulty
Nozzle replacement
Flame pulsates Fan pressure too high 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
Oil consumption too high Correctly adjust oil pressure
(see page22)
5692452 GB