125
Displayed fault
code
System characteristics
Cause
Measures
D6
Warning
The silo may not be full
enough
Check the silo fill level
D7
Warning
Heat exchanger cleaning
limit switch
Check the heat exchanger clean-
ing limit switch
D8
Warning
CAN bus interruption
■
Checking the fuses
■
Check wiring
E0
Burner locked out
Jumpers are not inserted
in slots 97 and 98
Check jumpers and insert if neces-
sary
F7
Burner locked out
Heat exchanger cleaning
did not reach limit position
■
Check the limit switch for heat
exchanger cleaning
■
Check heat exchanger cleaning
F8
Burner locked out
Ash removal screw con-
veyor has gone into re-
verse too often
Check ash removal screw convey-
or and ash box
F9
Burner locked out
Grate did not reach limit
position
■
Acknowledge a fault
■
If fault recurs, check grate
■
Clean grate if necessary
FA
Burner locked out
Proximity switch in pellet
hopper is constantly dirty
Clean proximity switch
FF
Boiler output deviating
Program memory error
Check boiler type in the control unit
Troubleshooting
Fault codes
(cont.)
5679249
Diagnosis