The VFD’s cooling fan has a minimum life span of 25,000 operating hours. The actual life span depends on the VFD usage and ambient temperature.
The operating hours can be found through P07.14.
Fan failure can be predicted by the increasing noise from the fan bearings. If the VFD is operated in a critical part of a process, fan replacement is recommended once these symptoms appear. Spare fans are also available.
9.3.1 Replacing the cooling fan
| Read and follow the instructions in Chapter 1 "Safety precautions". Ignoring the instructions would cause physical injury or death, or damage to the equipment. |
1. Stop the VFD and disconnect it from the AC power source and wait for at least the time designated on the VFD.
2. Loose the fan cable from the clip (remove the shell for the VFDs of 380 V 1.5–30 kW).
3. Disconnect the fan cable.
4. Remove the fan.
5. Install the new fan in the VFD, put the fan cables in the clip and then fix the VFD well. Keep the wind direction of the fan consistent with that of the VFD as shown below:
6. Connect the power supply.