VENMA Comfort S20, Operation And Maintenance Manual

Page: 15 / 21

12. FAQ - frequently asked questions
Alarm/notification text Possible causes
The burner has not ignited and the display
shows the
Ignition Failure error.
- No fuel in the tank- refill the fuel and fill the
feeder pipe during manual operation,
- Check the igniter during manual operation. If
there is an igniter failure, contact the technical
service.
- Check the burner grate for ash contamination.
Clean the grate manually if necessary.
- Check the external feeder during manual
operation. If the feeder is running but does not
supply the required amount of fuel, clean the
hopper and feeder pipe.
- Check if the end of the ignition is visible. Using
low-quality pellets may obstruct the igniter.
- Clean the photocell (gently with a soft, dry
cloth)
The controller displays the Too High Feeder
Temperature alarm
- Check that the chimney duct and the chimney
inlet pipe are clear.
- Carefully check the chambers, the heat
exchanger and the boiler flue - accumulation of
ash and soot may block the chimney draft,
- Check the burner grate for excessive ash
accumulation. Remove manually if necessary.
The blower and external feeder are not working.
The bimetallic thermostat has probably been
triggered. Wait for approx. 60 minutes. If the
fault persists, contact the technical service,
The burner did not start despite the demand for
DHW or request from the room controller
- Weekly Control function is active,
- The burner has been manually extinguished by
the User,
The central heating pump does not start despite
reaching the switch-on temperature
- The Controller is working in the Summer Mode
- change the Operating Mode to Parallel Pumps
or Home Heating,
- The Room Central Heating Pump function is
active,
The DHW pump does not start despite reaching
the switch-on temperature
- The Controller is working in the Home Heating
Mode - change the Operating Mode to Parallel
Pumps or Boiler Priority,
- the current DHW temperature is higher than
the boiler temperature,
- The DHW Operation Plan is active,
The Controller Does Not Switch On
Replace the fuse located in the actuation module
(the white box from which all the cables go out)
The burner makes a lot of smoke, soot is formed
on the boiler Insufficient oxygen or too much fuel:
- reduce the feed or increase the oxygen amount
- check if the openings in the grate and the
furnace plate are not obscured. If they are,
unblock them with a wire with a diameter of <4
15