Yamaha PW SYSTEM Manual page 34

Display Unit (Display B)
The Display Unit offers the following operations and infor-
mation displays.
™ Coin battery (CR2032)
Check if the rated coin battery is installed in the rear of the
Cover
Display Unit.
If a coin battery is not installed, or if there is not sufficient
Coin battery
(CR2032)
battery power remaining, install a new coin battery.
O-ring In case of setting the language, see "Language".
To adjust the time, see "Settings".
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