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StB activateD
Overheating, max. permissible
boiler temperature (95 °C) was
exceeded, safety temperature
limiter
(STB) was activated
Power failure
Correct defect, allow boiler to cool down, reset STB manually.
Failure heating circuit pump
Radiator adjusted to low opera-
tion (possibly thermal valve)
Open customer, the heating installer should have a look at
the heat customer if it occurs frequently
Air in the boiler /Heating system
De-aerate system
cLeaNiNg FaiLure
Problems with the grate
Pellets jammed
Empty ash pan (in operating position
StOve OFF
)
CAUTION: if ash pan cannot be pulled out, it is likely that the
grate is still open because of jammed pellets.
Throw 3-4 pcs. of ‘Zündis’ (product which helps to light a
fire) from above into the flue and set burner to ON position
to burn off residues from the grate.
Empty ash pan after remedy of fault (in operating position
StOve OFF
)
OverHeatiNg aPPL.
Warning signal overheating
Excessive fuel
Loading of fuel according to table Instruction manual stove
high chimney draught
Check chimney draught (chimney sweep, heating installer)
FLaMe SeNSOr KS
Flame sensor - short circuit
Call service technician
FLaMe SeNSOr uB
Flame sensor - failure
Fastening screws on terminal
block loose
Tighten screws on terminal block
Cable defective
Contact service centre
Flame temperature sensor de-
fective
Contact service centre
FLue gaS SeNSOr K
s
Oven sensor – short circuit
Call service technician
FLue gaS SeNSOr uB
oven sensor - failure
Cause see flame sensor UB
Solution see flame sensor UB
F11
ignition programm after power
failure
power failure
PLug-iN KS
Discharge chute sensor short
circuit
Call service technician
PLug-iN uB
Discharge chute sensor defective
Call service technician
FiLLiNg DOOr OPeN
Heating door or damper /start-up
flap open
Close heating door or damper /start-up flap
BOiLer SeNSOr KS *
Boiler sensor - short circuit
Call service technician
BOiLer SeNOSr uB *
Boiler sensor - failure
Cause see flame sensor UB
Solution see flame sensor UB
OverHeatiNg BOiLer
Overheating, the preset boiler
temperature limit (90°C) was
exceeded.
Cause see “Dust-caused”
Once the boiler temperature has fallen by 3°C below the
preset boiler temperature limit, the appliance resumes auto-
matically normal operation, the error message disappears.
NO cONNectiON
No connection between operating
panel and main circuit board.
Plugs disconnected from the
connecting cablet
Plug-in connections
Damaged cable
Replace connecting cable
Damaged operating panel
Replace operating panel
Operating panel incorrectly
mounted
Check mounting of operating panel (too tightly clamped)
SPeciaL cLeaNiNg
Service display – Special cleaning
Possible problem caused by
buildup of deposits in the ap-
pliance
Remove deposits from the appliance, in particular from the
pellet burner block by means of the cleaning brush provided.
Subsequently release key lock and press and hold the button
OK for two minutes to clear the error message by pressing
the butto 1/0.