Storage Guidelines - YASKAWA CR700 Technical Manual

7.7

Storage Guidelines

The chemicals in the electrolytic capacitors and other electronic parts of the drive change over time. When you
store the drive for long periods of time, use the information in this section to help keep the performance life
estimates.
Storage Location
◆
• Temperature and Humidity
When you store the drive for approximately one month, for example during shipping, you can put the drive in a
location where the temperature is -20 °C to +70 °C (-4 °F to +158 °F). Correctly package and store the drive
during shipping to prevent vibration and impact damage.
Do not put the drive in direct sunlight or where there will be condensation or ice. Put the drive in a location
where the relative humidity is 95% or less.
• Dust and Oil Mist
Do not keep the drive locations with dust or oil mist. For example, cement factories and cotton mills.
• Corrosive Gas
Do not keep the drive in locations with corrosive gas. For example, chemical plants, refineries, and sewage
plants.
• Salt Damage
Do not keep the drive in salty locations. For example, locations near the ocean, and salt damage-designated
locations.
Do not keep the drive in unsatisfactory locations. Keep all drives in storage rooms that are safe from
unsatisfactory elements.
Regular Application of Power
◆
To prevent deterioration of the capacitors, Yaskawa recommends that you apply power to the drive a minimum of
one time each year for a minimum of 30 minutes.
If you store the drive for longer than two years and do not apply power, Yaskawa recommends that you use a
variable power source and gradually increase the power from 0 V to the rated drive voltage over a period of 2 to 3
minutes. Apply power for a minimum of 1 hour with no load to reform the main circuit electrolytic capacitor.
When you operate the drive after you apply power, wire the drive correctly and check for drive faults,
overcurrents, motor vibration, motor speed differences, and other defects during operation.
A - AC power supply
B - Variable power source
YASKAWA SIEPC71061723A YASKAWA AC Drive CR700 Technical Manual
C - Drive
Figure 7.82 Power Distribution Method
7.7 Storage Guidelines
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