IPE300 series engineering VFD
Maintenance
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8.3 Cooling fan
The service life of the cooling fan of the VFD is more than 25,000 hours. The actual service life of the
cooling fan is related to the use of the VFD and the temperature in the ambient environment.
You can view the running duration of the VFD through
The increase of the bearing noise indicates a fan fault. If the VFD is applied in a key position, replace
the fan once the fan starts to generate unusual noise. You can purchase spares of fans from INVT.
Cooling fan replacement:
Read chapter 1 “Safety precautions” carefully and follow the instructions to
perform operations. Ignoring these safety precautions may lead to physical injury
or death, or device damage.
1. Stop the VFD, disconnect the AC power supply, and wait for a time no shorter than the waiting
time designated on the VFD.
2. Open the cable clamp to loose the fan cable (for the 380V 1.5
–30 kW VFD models, the middle
casing needs to be removed).
3. Disconnect the fan cable.
4. Remove the fan with a screwdriver.
5. Install a new fan in the VFD in the reverse steps. Assemble the VFD. Ensure that the air direction
of the fan is consistent with that of the VFD, as shown in the following figure.
Air direction
Air direction
Rotating direction
Figure 8-1 Fan maintenance for the 7.5kW and higher VFD model
6. Power on the VFD.
8.4 Capacitor
8.4.1 Capacitor reforming
If the VFD has been left unused for a long time, you need to follow the instructions to reform the DC
bus capacitor before using it. The storage time is calculated from the date the VFD is delivered.
Summary of Contents for IPE300 Series
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