Lambda Probe; Checking The Lambda Probe; Calibrating The Lambda Probe; Connection - Viessmann Vitoligno 300-C Installation And Service Instructions For Contractors

Maintenance
Sensors
(cont.)
3. Compare the test result with the actual tempera-
ture. Scanning test results, see chapter "Diagno-
sis".
In the case of severe deviation, check sensor instal-
lation and replace the sensor if required.

Lambda probe

For measuring the residual oxygen content in the flue
gas.

Checking the Lambda probe

1. Check the Lambda probe for contamination and/or
damage (see page 44).
2. Check the connecting cable for possible damage.

Calibrating the Lambda probe

1. Hang the probe for at least 15 minutes outside the
boiler in the installation room.
2. Call up the service menu on the control unit.
3. Use / to select menu point "Boiler". Confirm
| ~
with .
d

Connection

The Lambda probe is connected with plug
chapter "Connection and wiring diagram" from
page 117.
76
Notes
■ Do not paint, wax or treat the probe with any other
such substance. Only use special grease suitable for
Lambda probes to grease the threads.
■ The connection plugs must be kept clean and dry
and do not treat them with contact spray, anti-corro-
sion agents etc.
■ Do not solder the connecting cable; it must be crim-
ped, clamped or secured with screws.
4. Use
|
probe". Confirm with
The waiting time of 3 mins is displayed in s.
For Lambda probe specification, see page 77.
. See
a:K
/ to select menu point "Calibrate O2
~
d .