Cause of error Error correction
Oxygen content is greater
than the “Remaining O2 shut
down” parameter - duration
longer than safety time (in
the HEATING state):
Acknowledge error
NOTE: After acknowledging the error, error correction starts
immediately. Keep the doors of the boiler closed!
After error correction starts, check if the induced draught fan is
running
CAUTION! In case of defective induced draught fan inform the
heating engineers or Fröling customer services!
When error correction has been automatically carried out (approx.
20 min) the warning, “Clean/ check burner”, is shown on the
display.
After you have done this, open the insulating door and
combustion chamber door
Clean embers, fuel and slag from the pellet burner (see
chapter on maintenance)
Clean the flue gas guide in the boiler up to the mouth of the
chimney
Empty the ash drawer if necessary
Acknowledge warning
Safety time
O2 too high
039 F
• Wrong air in boiler
• Insufficient pellets fed
into combustion bowl
• Bridge formation over
trough
• Sensor incorrectly set
• Stoker not feeding
Check seal on ash box and
front doors
Check seal on heat exchanger
cover
Check that lambda probe is
fitted firmly
Refill pellets in bunker, check
discharge and stoker
ATTENTION! Do not feed any
pellets into the pellet burner
manually - danger of flash fires!
Break up the bridge, check
pellet length
Readjust the sensor
Check stoker drive
Flow temp 1 false 002 W • Sensor signal damaged Check sensor and sensor cable
Flow temp 2 false 003 W • Sensor signal damaged Check sensor and sensor cable
Flow temp 3 false 023 W • Sensor signal damaged Check sensor and sensor cable
Flow temp 4 false 024 W • Sensor signal damaged Check sensor and sensor cable
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