Miele OPTIMA SERIES G 2420 - Manual (Page 13)

Salt indicator
^ When the "Salt" indicator comes on,
refill the salt after the program is
finished.
After the reservoir has been filled, the
water softener is automatically
reactivated the next time the
dishwasher is started. The "Salt"
indicator will be lit during this process.
Before using for the first time
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