Bosch D220 - Silencing Trouble Tone Alerts; Muting System Trouble Alerts

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Silencing the Trouble Tone
The trouble tone sounds and the OK light blinks when there is system
trouble, such as low batteries cause system troubles.
1. When there is system trouble, the trouble tone sounds and the
OK light blinks.
2. Press the [CLEAR] key to silence the trouble tone.
3. Use Checking System Troubles (press [4]) to discover the origin of
the system trouble.