272 YASKAWA TM.V1000.01 V1000 Drive Installation & Start-Up Manual (Preliminary 01-19-07)
6.2 Inspection
6.2 Inspection
Power electronics have limited life and may exhibit changed characteristics or
performance deterioration after years of use under normal conditions. To help
avoid such problems, it is important to perform preventive maintenance and
periodic inspection on the drive.
Drives contain a variety of power electronics such as power transistors, semi-
conductors, capacitors, resistors, fans, and relays. The electronics in the drive serve
a critical role in maintaining proper motor control.
Follow the inspection lists provided in this chapter as a part of a regular
maintenance program.
The drive will require more frequent inspection if it is placed in harsh
environments, such as:
• high ambient temperatures
• frequent starting and stopping
• fluctuations in the AC supply or load
• excessive vibrations or shock loading
• dust, metal dust, salt, sulfuric acid, chlorine atmospheres
• poor storage conditions.
Perform the first equipment inspection 3 months after installation.
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