Checking The Ionisation Current - Viessmann VITODENS 333-F WS3A Service Instructions Manual

Further details regarding the individual steps

Checking the ionisation current

A Adaptor cable (available as
accessory)
1. Connect the test equipment
according to the diagram.
Commissioning, inspection, maintenance
(cont.)
2. Adjusting the upper output:
Constant temperature control
unit:
K + d press simultaneously:
"1" is shown.
a press:
"2" is shown.
Weather-compensated control
unit:
K + d press simultaneously:
"Relay test" and then
"Base load" is shown.
a press:
"Full load" is shown.
3. Ionisation current when the flame is
first established: min. 4 µA
Steps in case the ionisation current
is < 4 µA:
Check the electrode gap
Check the control unit power sup-
ply.
4. Press d.
Operation with the upper output is
terminated.
5. Record the actual value in the ser-
vice report.
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