Chapter 5 Troubleshooting VFD-EL-W
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5-13 Operating Environment Condition
Since the AC motor drive is an electronic device, you must deal with the operating environment
conditions. Here are some remedial measures to use if necessary.
1. To prevent vibration, anti-vibration dampers are the last choice. Vibration must be within the
specification. Vibration causes mechanical stress and it should not occur frequently, continuously or
repeatedly to prevent damage to the AC motor drive.
2. Store the AC motor drive in a clean and dry location, free from corrosive fumes/dust to prevent
corrosion and poor contacts. Poor insulation in a humid location can cause short circuits. If
necessary, install the AC motor drive in a dust-proof and painted enclosure. If necessary in
particular situations, use a completely sealed enclosure.
3. The ambient temperature should be within the specification. Too high or too low temperature affects
the lifetime and reliability of the AC motor drive. For semiconductor components, damage occurs
once any specification is out of range. It is necessary to periodically check air quality and the
cooling fan and provide extra cooling if required. In addition, the microcomputer may not work in
extremely low temperatures, making cabinet heating necessary.
4. Store the AC motor drive in a relative humidity range of 0% to 90% (non-condensing). Use an air
conditioner and/or desiccator if necessary.
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