Goodrive270 series VFD for fan and pump Maintenance
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Air direction
Rotation
direction
Air
direction
Figure 8-2 Fan maintenance for the 220kW and higher VFD models
6. Connect to the power.
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.
No charging operation is required.
1 to 2 years
The VFD needs to be powered on for 1 hour before the first running
2 to 3 years
Use a voltage controlled power supply to charge the VFD:
Charge the VFD at 25% of the rated voltage for 30 minutes
and then charge it at 50% of the rated voltage for 30 minutes
at 75% for another 30 minutes
and finally charge it at 100% of the rated voltage for 30 minutes.
More than 3 years
Use a voltage controlled power supply to charge the VFD:
Charge the VFD at 25% of the rated voltage for 2 hours,
and then charge it at 50% of the rated voltage for 2 hours,
at 75% for another 2 hours,
and finally charge it at 100% of the rated voltage for 2 hours.
The method for using a voltage controlled power supply to charge the VFD is described as follows:
The selection of a voltage controlled power supply depends on the power supply of the VFD. For
VFDs with an incoming voltage of 1PH/3PH 230 V AC, you can use a 230 V AC/2 A voltage regulator.
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