Viessmann Vitodens 222-F B2TA Installation And Service Instructions Manual page 57

Further details regarding the individual steps
1. Remove cover A.
2. Remove earth cable B from tab
C.
Commissioning, inspection, maintenance
(cont.)
3. Connect tester (up to 5 mA ) in series
between tab C and earth cable B.
■ If the current measures > 0.3 mA,
the anode is OK.
■ If the current measures < 0.3 mA or
if there is no current at all, inspect
the anode visually (see page 60).
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