Toa RM-971 - Manual (Page 25)

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7.1.2. Battery failure: Batteries of the main rack's DS-029B failed.
The main rack's batteries are automatically inspected every 24 hours. Should a failure be detected during a
manual inspection, it is alerted in forms of display and warning tone as well.
[Failure indication and measures]
Warning beep
(Not sounded during emergency broadcast.)
Display
CPU control switch
Shift the CPU control switch to the OFF position, and then back to the ON position.
Broadcast reset key
Warning tone stops, and the failure indication disappears.
Selected general-purpose broadcast speaker lines are disconnected.
Manually check the main rack's Emergency
Power Supply Panel DS-029B. Refer to the
instruction manual included with the main rack.
Should the failure indication be displayed again,
contact the shop from where the unit was
purchased, or TOA's service agent immediately.
(Press the [Broadcast Reset] key to stop a
warning tone.)
Check the date of installation of the main rack
batteries. If four years have passed since the
installation, contact the shop from where the
unit was purchased, or TOA's service agent
immediately because the batteries must be
replaced with new ones.