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Fault codes
(cont.)
Displayed fault
System characteristics
code
A1
Burner locked out
A2
Burner locked out
A3
Burner locked out
A4
Burner locked out
A5
Burner locked out
A6
Burner locked out
AA
Burner locked out
AB
Burner locked out
AC
Burner locked out
AD
Burner locked out
Cause
Combustion chamber
overfilled
Firebed light barrier is in-
terrupted
Fault, burn-back: Feed
tube hot
Fault, light barrier, firebed
monitoring
Fault, material shortage
Fault, material shortage
due to time-out
The blocking time set for
the vacuum module is too
long
Ash box full
Boiler had excess temper-
ature
Water pressure is too low
Water pressure is too high Check water pressure
Fault, flue gas filter
Troubleshooting
Measures
Clean combustion chamber and re-
start boiler
Check ash box position
■
Check air dampers
■
Check the boiler for leaks
■
Clean light barrier and sight glass
Check fuel store fill level
■
Manual charging: Check fill level
■
of day hopper
Pellet supply with vacuum sys-
■
tem: Check the output stage of
the vacuum module
If necessary, set a higher output
stage at the vacuum module
Installation and service in-
structions, vacuum module
Adjust the vacuum module block-
ing time in the control unit
The fault is cleared after the block-
ing time and the boiler is started
Emptying the ash box
■
Confirm message "Has the ash
■
box been emptied?"
Note
The ash box fill level can be reset
manually as follows:
1. å for "Menu".
2. | / ~ to select.
3. Confirm "Information" with d .
4. | / ~ to select.
5. Confirm "Reset data" with d .
Check set values in control unit
■
Check pump
■
Check valves
■
Check sensors
■
Note
For resetting the high limit safety
cut-out, see chapter "Maintenance,
high limit safety cut-out"
Check for water shortage and wa-
ter pressure
Check the fault on the external
control unit
123
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