Grundig GSBS15720X Manual Del Usuario página 33

Press once
"Upon seeing PS 0 screen, de-energise the refrigerator and energise it again. This
button for 3 seconds to make the filter counter to count down from 130 days.
Repeat the steps given above to cancel this function."
Filter warning light
Press for 3 seconds
while the filter warning
LED is active to reset the
.filter time
Press twice
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