Mitsubishi Electric A1SJ71DN91 User Manual page 5

[Cautions on Startup and Maintenance]
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Always turn off all external power supply phases before touching any terminals.
Failure to do this may result in malfunction.
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Always turn off all external power supply phases before cleaning or tightening the terminal screws.
Failure to do this may result in malfunction.
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Do not disassemble or modify any module.
This will cause failure, malfunction, injuries, or fire.
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Always turn off all external power supply phases before mounting or dismounting the unit.
Failure to do this may result in malfunction or damage to the unit.
[Cautions on Disposal]
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Dispose of this product as industrial waste.
CAUTION
CAUTION