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MELSEC-Q

4      INSTALLATION, WIRING AND MAINTENANCE OF THE PRODUCT 

 

4.5 Maintenance 

4.5.1 Maintenance precautions 

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. 

 

!

WARNING 

  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 precautions 

!

CAUTION 

  When disposing of the product, handle it as industrial waste.