MITSUBISHI ELECTRIC Mitsubishi Programmable Logic Controller QD75D - Manual (Page 87)

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MELSEC-Q
4 INSTALLATION, WIRING AND MAINTENANCE OF THE PRODUCT
4.5 Maintenance
4.5.1 Precautions for maintenance
The precautions for servicing the QD75 are given below. Refer to this section as well
as "4.1.3 Handling precautions" when carrying out the work.
!
DANGER
Always turn all phases of the power supply OFF externally before cleaning or tightening the
screws.
Failure to turn all phases OFF could lead to electric shocks.
! CAUTION
Never disassemble or modify the module.
Failure to observe this could lead to trouble, malfunctioning, injuries or fires.
Completely turn off the externally supplied power used in the system before installing or
removing the module.
Failure to turn all phases OFF could lead to module trouble or malfunctioning.
4.5.2 Disposal instructions
! CAUTION
When disposing of the product, handle it as industrial waste.