Kostrzewa Mini Bio Luxury 12kW, User Manual, Page: 72 / 212

72
Mini Bio Luxury 12; 21kW
User Manual – EN 10.17
Leader in pellet boilers
14. End notes for installers
Table 4. Failure chart
Failure Cause Remedy
The feed screw does not turn,
despite being signalled as functioning • no power to gear motor
• wrong wiring of power cables
• the feeder is blocked
• gear motor failure
• control module failure • check control module plugs and
connectors
• check the connection of the gear motor
to the screw shaft
• check if the feeder duct is not blocked and
that the screw shaft can rotate freely in the
duct
No air intake despite the fan being
signalled as functioning • no power to the fan
• fan failure
• control module failure • check fan plugs and cables
(with connectors)
• replace fan
• replace control module
Automatic fuel ignition not working • incorrect heating element connection
• heating element hot air outlet blocked
• heating element failure
• flame sensor contamination/failure
• flame sensor opening at the
rear grate wall contaminated
• check heating element plugs
and cables (with connectors)
• clean igniter opening
• high fuel moisture content
• replace heating element
• replace or clean the flame sensor
• clean flame sensor opening
Black smoke in the combustion chamber.
Not combusted fuel in the ash pan. • incorrect air volume
• incorrect feed and pause time for individual
power settings
• reduce air volume, check feed
and pause time (burner power too high)
Flying fuel particles in combustion chamber.
Non combusted fuel in the ash pan. • incorrect air volume
• incorrect feed and pause time for individual
power settings
• reduce air volume, check feed
and pause time (burner power too high)
Set temperature not reached • incorrect boiler for the given building
• sensor failure
• incorrect location of the return water
temperature sensor
• boiler power set too low
• check if boiler selection is correct
• check sensors
• check return sensor location
(water circulation required)
• check burner feed and pause times
Smoke coming from the boiler • blocked flue
• boiler extension duct blocked
• heat exchanger channels blocked • clean the ducts and channels