Capacitors; Capacitors Reforming - INVT Goodrive 310-UL Series Operation Manual

GD310-UL series VFD
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.
6. Connect the power supply.

9.4 Capacitors

9.4.1 Capacitors reforming

The DC bus capacitors must be reformed according to the operation instruction if the VFD has been
stored for a long time. The storing time is counted from the producing date other than the delivery
data which has been marked in the serial number of the VFD.
Time
Storing time less than 1 year
Storing time 1-2 years
Storing time 2-3 years
Storing time more than 3
years
Use voltage-adjusting power supply to charge the VFD:
The right selection of the voltage-adjusting power supply depends on the supply power of the VFD.
Single phase 220V AC/2A power surge is applied to the VFD of single/three-phase 220V AC. The
VFD of single/three-phase 220V AC can apply single phase 220V AC/2A power surge (L+ to R, N to S
or T). All DC bus capacitors can charge at the same time because there is one rectifier.
High-voltage VFD needs enough voltage (for example, 460V) during charging. The small capacitor
power (2A is enough) can be used because the capacitor nearly does not need current when
charging.
The operation method of VFD charging through resistors (LEDs):
The charging time is at least 60 minutes if charge the DC bus capacitor directly through supply power.
This operation is available on normal temperature and no-load condition and the resistor should be
serially connected in the 3-phase circuits of the power supply:
460V drive device: 1k/100W resistor. LED of 100W can be used when the power voltage is no more
than 460V. But if used, the light may be off or weak during charging.
Operational principle
Operation without charging
Connect with the power for 1 hour before first ON command
Use power surge to charge for the VFD
• charging 25% rated voltage for 30 minutes
• charging 50% rated voltage for 30 minutes
• charging 75% rated voltage for 30 minutes
• charging 100% rated voltage for 30 minutes
Use power surge to charge for the VFD
• charging 25% rated voltage for 2 hours
• charging 50% rated voltage for 2 hours
• charging 75% rated voltage for 2 hours
• charging 100% rated voltage for 2 hours
-187-
Maintenance and hardware diagnostics