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8 Maintenance
MITSUBISHI CNC
< Replacement procedure for the battery unit MDS-BTBOX-36 >
Possible backup period
Possible backup period is at most one year. Thus, make sure to exchange the batteries in the one-year cycle.
How to replace the battery
[1] Remove the battery box cover (four screws).
[2] Replace the batteries with new ones. Be careful not to mistake the polarity.
[3] Attach the cover, and fix it with the four screws.
[4] Cancel the warning 9F by restarting the drive unit to reset the voltage drop detection circuit of the battery
box.
(Note 1) Replace the batteries while applying control power to the servo drive unit.
(Note 2) If the cover is ill-set, mist enters through the interstices and enter into the panel. Tighten the screws.
CAUTION
1. Use new batteries that are within the recommended service period. (Check the recommended service period written on
the batteries before using them.)
2. Replace the batteries with new ones immediately after the battery voltage drop alarm (9F) has been output.
3. Replace the batteries while applying the servo drive unit’s control power.
4. Wrong connection may cause liquid leakage, heat generation and/or explosion.
5. Do not mix new batteries with used ones or mix different type batteries.