Goodrive270 series VFD for fan and pump Maintenance
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Both 1PH and 3PH VFDs can be charged with a 1PH voltage controlled power supply (connecting L+
to R, and N to S or T). All the DC bus capacitors share one rectifier, and therefore they are all
charged.
For VFDs of a high voltage class, ensure that the voltage requirement (for example, 380 V) is met
during charging. Capacitor changing requires little current, and therefore you can use a
small-capacity power supply (2 A is sufficient).
The method for using a resistor (incandescent lamp) to charge the drive is described as follows:
If you directly connect the drive device to a power supply to charge the DC bus capacitor, it needs to
be charged for a minimum of 60 minutes. The charging operation must be performed at a normal
indoor temperature without load, and you must connect a resistor in series mode in the 3PH circuit of
the power supply.
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than 380V, you can also use an incandescent lamp of 100W. If an incandescent lamp is used, it may
go off or the light may become very weak.
Power supply
380 V
VFD
R
S
T
U
V
W
Resistor
1 Kœ/100 W
Resistor
1 Kœ/100 W
Resistor
1 Kœ/100 W
Figure 8-3 380V driving-device charging circuit example
8.4.2 Electrolytic capacitor 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.
The electrolytic capacitor of a VFD must be replaced if it has been used for more than 35,000 hours.
For details about the replacement, contact the local INVT office.
8.5 Power cable
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 power supply, and wait for a time no shorter than the waiting time
designated on the VFD.
2. Check the connection of the power cables. Ensure that they are firmly connected.
3. Connect to the power.
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