Chapter 5 Methods of Anomaly Diagnosis | VFD-VJ
5-25
5-4 Environment and facilities for installation
The hybrid servo drive is a device for electronic components. Detailed descriptions of the environment
suitable for its operation can be found in the specifications. If the listed regulations cannot be followed for
any reason, there must be corresponding remedial measures or contingency solutions.
1. To prevent vibration, anti-vibration spacer is the last choice. The vibration tolerance must be
within the specification. The vibration effect is equal to the mechanical stress and it cannot
occur frequently, continuously or repeatedly to prevent damaging AC motor drive.
2. Store in a clean and dry location free from corrosive fumes/dust to prevent rustiness, poor
contact. It also may cause short by low insulation in a humid location. The solution is to use
both paint and dust-proof. For particular occasion, use the enclosure with whole-seal
structure.
3. The ambient temperature must be just right. If the temperature is too high or too low, the
lifetime and action reliability of electronic components will be affected. For semiconductor
devices, once the conditions exceed the rated values, consequences associated with
“damage” are expected. As a result, in addition to providing cooler and shades that block the
direct sunlight that are aimed to achieve required ambient temperature, it is also necessary to
perform cleaning and spot check the air filter in the storage tray of hybrid servo drive and the
angle of cooling fan. Moreover, the microcomputer may not work at extremely temperature,
space heater is needed for machines that are installed and operated in cold regions.
4. Avoid moisture and occurrence of condensation. If the hybrid servo drive is expected to be
shut down for an extended period of time, be careful not to let condensation happen once the
air conditioning is turned off. It is also preferred that the cooling equipment in the electrical
room can also work as a dehumidifier.
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