Check the following items before use.
1. Check whether the ambient temperature of the VFD during actual application exceeds 40°C, if yes, derate 1% for every additional 1°C. In addition, do not use the VFD when the ambient temperature exceeds 50°C. Note: For cabinet-type VFD, its ambient temperature is the air temperature inside the cabinet. |
2. Check whether ambient temperature of the VFD during actual application is below -10°C, if yes, install heating facility. Note: For cabinet-type VFD, its ambient temperature is the air temperature inside the cabinet. |
3. Check whether the altitude of the application site exceeds 1000m. If yes, derate 1% for every increase of 100m; when the installation site altitude exceeds 3000m, consult the local INVT dealer or office. |
4. Check whether the humidity of application site exceeds 90%, if yes, check whether condensation occurred, if condensation does exist, take additional protective measures. |
5. Check whether there is direct sunlight or animal intrusion in the application site, if yes, take additional protective measures. |
6. Check whether there is dust, explosive or combustible gases in the application site, if yes, take additional protective measures. |