Technical information

The following status codes may be
displayed during normal operation.
Code Meaning
. (point) burner in operation
0 ready for use
C central heating use
c central heating pump overrun
d Hot water operation
b boiler operation
h Hot water pump overrun
o frost protection
P system water pressure
If the control system detects a fault, the
burner will be switched off and every
heating demand will be blocked.
The fault indications are divided into two
different groups:
blocking and interlocking.
The interlocks give a flashing code on the
status display, the blocks give a non-
flashing code.
The following blocking codes are possible:
Malfuncti
on code
Description of malfunction
1 or 1. Supply sensor open or short-
circuit(ed)
2 or 2. Return sensor open or short-
circuit(ed)
6 or 6. Tank sensor open / short-
circuit(ed)
4 or4. External sensor open or
short-circuit(ed)
F / F. Burner does not ignite or
goes out
A Exhaust gas sensor > 80 °C
E Control system internal fault
U Neutral or Live reversed
P Pump Test
q Supply sensor > 105 °C
The following lockout codes are shown as
flashing symbols:
Code Meaning
F Too many ignition attempts
1 Supply sensor failure
2 Too many flame faults detected
3/ 7/E Control system internal fault
5 Fan malfunction
A Exhaust gas sensor > 95 °C
7 Gas valve malfunction
Once operation is locked out, the control
system will wait until the fault is removed.
After this the control system will return to
normal operation. A lockout action can only
be cancelled by pressing the reset
pushbutton.
27. Menu structure
Several parameters can be set by pressing the set/reset pushbutton on the display for longer
than 5 seconds. This brings you into the settings menu.
In order to see/change the following parameter, the set/reset pushbutton must be pressed once.
The value of the parameter can be changed by pressing the +/- pushbutton.
The menu contains the following parameters:
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