Baxi Bioflo User Operating Instructions Manual page 46

Troubleshooting
Code Meaning/effect
No neggativ pressure in combus-
tion chamber or sensor defective.
AL 156
Press Reset.
Maximum heating up time
exceeded
AL 171
Clean the burner pot. Press Reset.
No communication with
main PCB
AL 187
Check connection for main PCB and
connections. Press Reset.
Internal error occurred
AL 188 ErrorCode 188
Current TablelD 4
Cause/remedy
The boiler switches to burnout mode.
a) Heating surface cover leaking, check whether this is firmly closed (see sec-
tion 3.8), press the Reset button.
b) Combustion chamber and ash door are leaking – check the seal, replace
the seal if necessary, press the reset button.
c) Pressure measuring nipple of combustion chamber pressure switch is blok-
ked – clear it (see section 3.9.1), press the reset button.
d) Intake air line or induction opening at rear is blocked – clear it and press
the reset button.
e) Exhaust pipe or flue is blocked, clear it and press the reset button.
f) Combustion chamber pressure switch is defective, inform Baxi Customer
Service or a heating technician.
a) The reserve supply container is empty.
Fill fuel into the fuel container (see section 2.3). Press the Reset button
until the boiler starts operating again. The alarm message AL 171 may
light on up to 2 occasions, press the Reset button.
b) Clean the burner pot (see section 3.6), empty the ash pan .
c) Too much dust in the reserve supply container – bridge formation, remo-
ve the dust (see section 3.7), press the Reset button.
d) Auger conveyor or rotary feeder jammed due to a foreign body, clean the
reserve supply container or rotary feeder (see section 3.7) and remove the
foreign body, refill the reserve supply container. The alarm message AL 171
may light on up to 2 occasions until the boiler starts operating again, press
the Reset button.
f) Ignition defective, inform Baxi Customer Service or a heating technician.
The boiler switches to burnout mode.
a) Check the connection cable or Info panel plug connection to the main PCB,
inform Baxi Customer Service or a heating technician.
b) Connect the main PCB, inform Baxi Customer Service or a heating techni-
cian.
Internal communication error. The boiler switches to burnout mode.
A reset is performed automatically after 1 minute if this error occurs.
If the malfunction occurs after a short period, or recurs at regular intervals,
contact Baxi Customer Service or your heating technician.
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