27
Checking and calibrating the Lambda probe
The Lambda probe can be calibrated manually as fol-
lows:
Danger
There is a risk of fire and burns due to hot com-
ponents and cinders.
■
Switch OFF the boiler and let it cool down.
■
Carry out maintenance and cleaning work only
on central heating boilers that have cooled
down.
■
Allow hot component to cool down before
removing.
■
Wear suitable personal protective equipment,
in particular protective gloves.
Requirements
■
Boiler not in operation
■
Flue gas temperature < 50 °C
Check Lambda probe
1.
Disconnect the Lambda probe plug. Remove the
Lambda probe from the flue pipe.
2.
Check the Lambda probe for contamination and
damage. Clean if necessary.
3.
Reconnect the Lambda probe plug.
4.
Call up the service menu on the control unit.
Probe heating is activated automatically.
5.
Hang the Lambda probe for at least 15 minutes
outside the boiler in the installation room without
any earth contact.
Calibrating the Lambda probe
1.
d
+
å
simultaneously for approx. 4 seconds.
The
"Service"
menu appears.
2.
|
/
~
for
"Service functions"
.
3.
d
to confirm.
4.
|
/
~
for
"Calibrate O2 probe"
.
5.
d
to confirm.
6.
|
/
~
to select.
7.
d
to confirm.
8.
|
/
~
for
"Yes"
.
9.
d
to confirm.
10.
ä
until the default display is shown.
Note
The Lambda probe is calibrated correctly when
21 % O
2
is displayed.
We recommend repeating the Lambda probe
calibration regularly. See table "Maintenance
intervals" on page 31.
Ending commissioning
Press the following keys:
1.
|
/
~
To end the commis-
sioning sequence:
Select
"Yes"
.
The display changes
to the standard
menu.
To restart the com-
missioning se-
quence:
Select
"No"
.
2.
d
To confirm.
Commissioning, inspection, maintenance
Lambda probe
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