The M-ESA-J1003B2C-21.1 Driver Units have high capacity conductors in its internal circuits, thus resulting in high residual voltage of the capacitors for few minutes after the power is turned off.
◊ Do not detach a cover of Driver Unit unless it is necessary.
◊ When the cover has to be removed, follow the procedures bellow.
1) Turn off the control and main power.
* If only main power has been turned on, turn the control power on for 5 seconds or more, and then turn off both of them. Neglect of this procedure is very dangerous because you cannot discharge residual voltage of capacitors.
2) Wait for 5 minutes or more after the control and main powers were turned off, and then remove the cover.
