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GB-18
D
GB
F
NL
I
E
? Fault code
U.
and
2
flash alternately and the
light is red?
!
Voltage supply is above the limit (programmable
limit, e.g. > 260 V).
•
Ensure that adequate mains voltage is supplied.
? Fault code
U.
and
3
flash alternately and the
light is red?
!
All start-up attempts in the programmed voltage
range (e.g. 160 – 180 V) are unsuccessful. The
last start-up attempt is not made to prevent a
lock-out.
•
Ensure that adequate mains voltage is supplied.
? Fault code
U.
and
5
flash alternately and the
light is red?
!
While a fault was pending, the unit has been
successfully reset more than 5 times within
15 minutes using the remote reset input.
▷
Reset is only possible by pressing the RESET
button on the burner control unit or using the
remote reset if there is one.
? Fault code
U.
and
6
flash alternately and the
light is red?
!
The unit has been unsuccessfully reset more
than 10 times within 15 minutes using the remote
reset input.
▷
Reset is only possible by pressing the RESET
button on the burner control unit or using the
remote reset if there is one.
? A circulating dash is displayed rather than
a fault code?
▷
After switching on the voltage, a circulating dash
is displayed.
▷
Three possible pieces of information are output:
!
Switch-on delay time running.
Or
!
Cycle lock active. The time (cycle lock) between
two starts is too short.
•
The display will go out automatically as soon as
the time between two starts is long enough. The
burner control unit will ensure a pause between
start-up attempts on the basis of its parameteri-
zation. This warning is displayed during this time.
Or
!
The main fan is switched off but the pressure
switch signal does not drop. A burner restart is
not possible.
•
After 25 s, the display will change to fault code
A.
9
.