Harvia Sentiotec A2 Instructions For Installation And Use Manual page 44

Installation instructions, for professionals only
c. Remove the housing cover and the control panel.
d. Turn the knob to the maximum setting (as far as it goes to the right).
e. For the vertical 10-pin connector, short-circuit pin 1 and pin 2
use a suitable screwdriver, as shown in the figure below.
f. Pin 1 and pin 2 are the bottom 2 contacts.
g. Switch on the control unit.
h. The display shows P123 or P1.
i. Disconnect the connection between pin 1 and pin 2.
j. Wait about 5 seconds and then press and release the start button.
k. Finally, reassemble the control unit in reverse order of disassembly.
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If a problem persists, consult your supplier.
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