Viessmann Vitoligno 300-C Installation And Service Instructions Manual page 110

Troubleshooting
Fault codes
(cont.)
Displayed fault System characteristics
code
B0 Burner locked out
B1 Burner locked out
B2 Burner locked out
B3 Burner locked out
B4 Control mode
B5 Burner locked out
B6 Burner locked out
B7 Burner locked out
B8 Burner locked out
B9 Burner locked out
BA Burner locked out
BB Burner locked out
BC Burner locked out
BD Burner locked out
BE Burner locked out
BF Burner locked out
C8 Burner locked out
C9 No fuel transport
D0 Warning
D1 Warning
D2 Warning for log boiler
D3 Warning for log boiler
D4 Warning
D5 Warning
110
Cause
Fault, light barrier, feed
screw conveyor
Shut-off gate valve stick-
ing
Fault, light barrier, screw
conveyor
Fault, external charging
Fuel store empty
Fault, motor, feed screw
conveyor
Fault, motor, screw con-
veyor
Fault, motor, ash removal
Fault, suction turbine mo-
tor
Fault, feed screw convey-
or reversal
Maintenance cover of feed
screw conveyor open
Maintenance cover of
screw conveyor open
Maintenance cover of dis-
charge open
Maintenance cover/door
of fuel store open
Proximity switch at dis-
charge screw conveyor is
permanently active
Rotary lock valve motor is
too hot
Changeover unit has not
reached position
Vacuum module spends
too long in constant oper-
ation
Ash box full
Day hopper empty
Too little heat available for
consumers
Too little heat available for
consumers
The boiler is dirty
Boiler maintenance nec-
essary
Measures
Clean light barrier
Check shut-off gate valve for ease
of operation
Clean screw conveyor light barrier
Check whether external charging is
working
Check fuel store fill level
Check feed screw conveyor motor
Check screw conveyor motor
Check ash removal motor
Check suction turbine motor
Check feed screw conveyor rever-
sal
Check maintenance cover of feed
screw conveyor
Check maintenance cover of screw
conveyor
Check maintenance cover of dis-
charge
Check maintenance cover/door of
fuel store
Clean sensor if possible
Check rotary lock valve motor for
ease of operation and acknowl-
edge fault
Check the changeover unit
Check suction lines for block-
■
ages and remove if necessary
Ensure there is sufficient fuel in
■
the fuel store
Empty the ash box
■
Confirm message "Has the ash
■
box been emptied?"
Fuel check
■
Check supply times
■
Check vacuum module
■
Recharge wood
Heat up the log boiler
Clean the boiler
Carry out boiler maintenance