Buffalo DC331-N - Page 29

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Fault
Possible Cause
Remedy
Lifting of flames or
Blowing Flames
Too much primary air.
Adjust the air shutter to eliminate lifting of
flames.
Wrong size of injector orifice
installed.
Check the orifice size of the injector installed.
Replace injector if necessary.
Extinction Pop or
Flashback during
extinction
Too much primary air.
Adjust the air shutter of the burner to minimize
primary air input.
Gas pressure is too low.
Adjust the gas supply pressure to required
standard.
Wrong injector orifice size
installed.
Check the orifice size of the injector installed.
Replace it if necessary.
Faulty or clogged burner.
Clean the burner or replace it if necessary.
Fluctuating flames
Unsteady gas pressure due
to faulty gas pressure
regulator or gas meter.
Replace the gas regulator or gas meter.
Injector’s orifice is clogged or
blocked by dust or dirt.
Clean the injector’s orifice or replace it as
necessary.
The burners are directly
under the exhaust fans.
Check and ensure that the burners are not
directly under the exhaust fans. Relocate the
unit if necessary.
Floating flames
Poor venting. Flue-ways are
blocked by soot or dust.
Check and clean the flue-ways.
Burners are clogged or
blocked.
Clean the burners or replace them as
necessary.
Operated from cold start.
Warm up stage.
Allow the appliance to heat up.
Flame roll-out.
Poor venting. Flue-ways are
blocked by soot or dust.
Check and clean the flue-ways.
Burners are clogged or
blocked.
Clean the burners or replace them as
necessary.
Piezo igniter won’t
ignite
Faulty igniter wire.
Replace the Pilot Assembly/Flame Device
System (FDS).
Faulty piezo igniter.
Replace the piezo igniter.
The piezo igniter is a consumable and is not
covered under warranty.