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Vaillant VR 50 - Page 39

Vaillant VR 50
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Troubleshooting
Operating and installation instructions 0020248967_00
39
8
2. Re-insert the batteries in accordance
with the polarity markings and, at the
same time, press and hold the system
button for four seconds until the signal
LED starts to rapidly flash in orange.
3. Release the system button.
4. Press the system button again for four
seconds until the signal LED lights up
green.

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