Baxi Bioflo User Operating Instructions Manual page 45

Troubleshooting
Code Meaning/effect
No flame formation in control
mode
AL128
Clean boiler and burner.
Press Reset.
Safety temperature shut-
down
AL 133
Check the system and filling pressure.
Press Release button on boiler.
Excess temperature in the auger
tube
AL 135
Check the burner. Press Release button
B7a on control panel.
Cover of safety thermostat
auger tube B7a
Fig. 109 FireWIN control panel, rear right side panel removed
Cause/remedy
The flame goes out in modulation mode. The boiler switches to burnout mode.
a) Clean the burner and the boiler. Check the exhaust pipe to the flue and
clean it if necessary, press the Reset button.
b) Auger conveyor or rotary feeder jammed due to a foreign body. Clean the
reserve supply container, opening above auger conveyor or rotary feeder
(see section 3.7) and remove the foreign body. Press the Reset button. The
alarm message AL 171 may light on up to 2 occasions until the boiler starts
operating again, press the Reset button.
c) Inform Baxi Customer Service or a heating technician.
Boiler temperature is above 100 °C, boiler enters burnout mode, vacuum fan
is switched off immediately.
a) Check the water level or pressure in the heating system – refill, bleed the
air.
b) Air in the heating system – bleed air.
c) The heat pump or boiler feed pump is sticking or is defective – start pump
manually or have it repaired.
Once the boiler water temperature falls below 90 °C, remove the cover, press
the Release button of the safety thermostat B7 firmly – Fig. 163.
If the malfunction occurs after a short period, or recurs at regular intervals,
contact Baxi Customer Service or your heating technician.
The boiler switches to burnout mode.
a) Check the burner, remove all pellets from the burner pot.
b) Remove the cover from the safety thermostat auger tube B7a, press the
Release button firmly (see Fig. 163). If the ignition does not function first
time (AL 171), press the Reset button (pellets in the auger conveyor will
have been damaged due to the higher temperature).
45
Cover of safety thermostat
B7
Device fuse T 6.3 A