Electrolytic Capacitor; Reforming - INVT Goodrive390L Series User Manual

Goodrive390L Series Lift-Dedicated VFD

9.2.2 Electrolytic capacitor

Possible damage cause

The possible causes include high input power harmonics, high ambient temperature,
frequent load jumps, and electrolyte aging.
Filter capacitor replacement

It is recommended that a professional be asked for the replacement because the filter
capacitor involves VFD internal components.

9.3 Reforming

If the VFD has been left unused for a long time, you need to follow the instructions to
reform the DC bus electrolytic capacitor before using it. The storage time is calculated
from the date the VFD is delivered. For detailed operation, contact us.
Storage time
Less than 1
No charging operation is required.
year
Before the first run, apply the voltage of one class lower than the VFD voltage
1 to 2 years
class to the VFD for 1 hour.
Use a voltage controlled power supply to charge the VFD:

2 to 3 years



Use a voltage controlled power supply to charge the VFD:

More than 3

years


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. Both 1PH and 3PH VFDs can be charged with a 1PH voltage controlled
power supply (connect 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
202403 (V1.0）
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.
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.
Operation principle
Inspection and maintenance
127