5. Fault correction
AL 171
Maximum preheat time exceeded
No flame formation during preheat pro-
cess. Preheat process cancelled.
a) Clean the burner pot (see sect. 4.6) and empty the ash
pan (BioLyt Standard). Press Reset key.
b) Because of too much pellets dust the conveyer system
will get empty. (but eventually, meanwhile a pellets inlet
was started.)
storage tank emptying completly (see
sect. 3.10) and remove dust. Until is in use again, there
can appear the AL-message AL 171 twice. Confirm this
with the Reset-key.
c) The conveyer system sticks because of an external
part, clean storage tank (see sect. 3.10) and remove
external parts through opening of the conveyer system,
refilling of the storage tank. Until is in use again, there
can appear the AL-message AL 171 twice. Confirm
this with the Reset-key.
d) Ignition defective. Inform the Hoval Customer Service
or the heating engineer.
AL 187
No communication with the auto-
matic burner control unit
Boiler goes into burnout mode.
a) Check the connection cable or connection between
the InfoDisplay and the automatic burner control unit.
Inform the Hoval Customer Service or the heating en-
gineer.
b) Connect the automatic burner control unit. Inform the
Hoval Customer Service or the heating engineer.
AL 188
Internal error occured
ErrorCode 188
CurrentTablelD 4
Internal communication error. Boiler
goes into burnout mode.
When this error appears, the unit is reset automatically
after 1 minute.
Please contact the Hoval Customer Service or the
heating engineer if the fault reappears shortly after-
wards or at regular intervals.
AL 195
Combustion chamber door open
during operation
Boiler goes into burnout mode.
Close the combustion chamber door. The door may
only be opened when the burner is turned off. Press
Reset key.
Non-observance can lead to permanent damage
of combustion chamber parts due to temperature
peaks!
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