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0006080895 ed 2007/02
TWO-STAGE GAS BURNERS
The built-in microprocessor controls not only the programming sequence but the information system too.
The individual phases of the programming sequence are displayed as Flash-Code. The following messages can
be distinguished:
Message
Flash-Code
waiting for air proving switch
I I .
pre-purge
I I I .
tv1
pre-ignition
I I I I .
tvz
safety time
█
I .
ts
Delay 2
nd
-stage
█
-stage
█
I I .
running
I
_
I
I
low mains voltage
I
█ █
█ █
_
Internal fuse defect
I
█
█
_
>
control box defect
Description
I
short pulse
█
long pulse
.
short pause
_
long pause
__
Lock-out diagnoses
In case of a failure the LED is permanently illuminated. Every 10 seconds the illumination is interrupted by a fl ash
code, which indicates the cause of the error. Therefore the following sequence is performed which is repeated as
long as the unit is not reset.
Error diagnosis
Error message
Flash-Code
Possible fault
lock out
I
█ █ █ █
within lock out safety time
safety time
no fl ame establishment
stray light
I I
█ █ █
stray light during monitored phase,
detector may be faulty
air proving switch
█ █
I I I
air proving switch
in closed position
contact welded
air proving switch
I I I
█ █
air proving switch does not
time-out
close within specifi ed time
air proving switch opened
I I I I
█
air proving switch opens
during start or operation
loss of fl ame
█ █ █ █
loss of fl ame
█ █ █ █
I
loss of fl ame during operation
Flash-Code for manual lock out
anual/external
█ █ █ █ █
anual/external
█ █ █ █ █
anual/external
█ █ █ █ █ █ █ █ █ █
lock out
(see also 4. lock out and reset)
Sequence:
illuminated phase
dark phase
Flash-Code
dark phase
I
█ █ █ █
for 10 sec
for 0.6 sec
for 1.2 sec
