PFA, BGT · Edition 03.11
17
4 .1 Scanning the parameters
During operation, the 7-segment display shows the program
status.
The individual parameters of the PFA can be called up on the
display by repeatedly pressing the Reset/Information button
(for 2 seconds).
In the event of a fault, the PFA halts the program run, the display
blinks and it then displays the cause of the fault in coded form.
The PFA indicates “
––
” when the mains switch has been
switched off. This signals standby mode. The bus interface is
still operational to maintain the function of the communica-
tion system.
4 .2 Changing parameters
The PFA is protected by a password to prevent unauthorized
changes to the parameter settings. After entering the pass-
word, the parameter settings can be modified. Be aware of
possible effects on the safe functioning of the system. The
factory default password is 1234.
4 .3 Manual operation
The PFA can be started in manual mode for burner adjustment
or for fault-finding.
When switching on, press the Reset/Information button until
the unit reverts to manual mode. Two dots blink on the dis-
play. In this operating mode, the burner control unit operates
independently of the status of the bus and the inputs (apart
from the pre-purge input and the safety interlocks).
In the factory default setting, manual mode is limited to 5
minutes (parameter 34 = 1). During this time, the burner can
be adjusted, for example. If parameter 34 is set to 0, the time
limitation will be removed. Emergency operation is now pos-
sible, for example in the event of a lengthy bus fault. (In the
event of a bus fault,
P
will blink on the display).
Using the opto-adapter and the BCSoft software (see page 23
(Opto-adapter and BCSoft)), the operating mode parameters for
manual mode can be changed. On parameterization, ensure
that the program sequence matches the application. Select the
parameters so that the burner can be operated as intended
in all operating phases.
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