Troubleshooting
11
59
We reserve the right to make any changes due to technical modifications.
Commissioning and maintenance instructions Logano GE434 Gas-fired special boiler • Issue 02/2003
Buderus Heiztechnik GmbH • http://www.heiztechnik.buderus.de
Main flame burns for approx. 2 to 5
minutes.
Then the burner goes off and only restarts
after 15 minutes.
The control device also indicates a fault
intermittently.
Info:
The integral flue gas monitor
recognises flue gas escaping from the
draught hood.
Determine and remedy the cause for
insufficient flue draught. Shut the burner
down, if the fault cannot be remedied
immediately.
Info:
flue gas escaping during a heat
demand will be tolerated four times. A
fault shutdown is activated the fifth time
this occurs.
Negative pressure in the flue pipe > 3 Pa?
Is the flue pipe blocked?
Is the size of the chimney OK?
Are fans used in the boiler room, which
extract air from the room (extractor hoods,
dryers …)?
Main flame burns very shallow.
Unpleasant burner whistle.
Burner sooty.
Are the main gas nozzles suitable for the
re-checked gas supply?
If not: Install correct nozzles.
Is the nozzle pressure adjusted correctly? Check the setting details and correct, if
required.
Is the start-up load setting correct?
Is contamination of slots or below the
burner rod slots obvious (e.g. fluff, fibres,
airborne seeds, building dust)?
Carry out the burner wet cleaning
described in this manual.
Determine the source of contamination
and prevent further contamination.
In case of airborne seed, install an air filter
in the inlet air supply acc. to requirements.
Do ventilation and extract apertures
comply with local regulations or those
stipulated by your local gas supply
company?
In case of insufficient ventilation air,
immediately and permanently remedy that
shortcoming.
Do apertures function permanently?
Are deposits or fibre contamination visible
on the heat exchanger surface (visual
check through the clean-out cover and
combustion chamber)?
Clean the boiler dry or, if required, wet.
Are burner rods damaged, deformed or
individual slots deformed?
Replace the burner grate.
Determine and remedy the cause of the
fault.
Info:
Damage and deformation only arise,
if one of the faults listed above has
occurred.
Burner ignition very noisy and extreme
combustion noises.
Flame may be visible at the main gas
nozzles.
Are the correct nozzles installed?
Shut the burner down, install new burner
grate and remedy faulty gas conversion.
Is the nozzle pressure adjusted correctly?
Is the start-up load setting correct?
Operating condition/faults observed
Troubleshooting
Remedy
