problem with F002. (DC Inverter SIMOVERT VC6SE7041-2WL60-Z).

 dear all. 

Thanks for your discussion. I would lik to add another reason that some times DC link fuses burnt due to IGBT damaged or cable or motor burnt

So be carfule don't restart without check these fuses. 

Thanks

eskey

diwa

Dear All ,

As I had promised I have come out with this 1^st part of the "Common Faults in Masterdrives and their solutions". I hope this will help all the forum users for fault finding in the Masterdrive series of drives.

In this chapter we will be discussing about the faults in masterdrive chasis units only. Here we are assuming that the drives are having ac supply rating as 400V i/p and are always fed with 24v at the X9 connector (pin 1 and 2).

You are requested to refer to my earlier postings about the hardware of masterdrives for understanding the names of the different boards I will be using here.

The first fault we are starting today is

F002 Pre-charging fault.

This is a Pre-Charging Fault. This fault comes normally when you have given a ON command to the drive and the DC link voltage has not built up. After getting the on command the microcontroller of the drive first checks for the dc voltage and finds that the required level is not available at the dc terminals. It then trips with fault F002.

Causes for this fault could be any of the following.

1) There is no ac supply given to the drive.

2) If after giving the on command the main contactor has not picked up there will be no as supply to the drive hence no dc voltage and hence this fault.

3) The pre-charging resistor is open. In this case there will be no dc supply even if there is ac supply at the i/p of the drive. Drive will trip on F002 after giving on command.

4) Assuming the ac supply is ok, the main contactor also picks up, the pre-charging resistor is also ok, and if you measure the dc voltage across the DC terminals of the drive with a voltmeter the voltage is also as per the specification (approx 560V dc) but still the drive trips with this F002 fault. You have to now check the value of r006 and compare it with what your voltmeter reading at the same instance. If the values do not match ( you will find the value of r006 is 0v or very much lower than the actual voltage measure by the voltmeter) the drive will trip with F002. What happens here is the actual dc voltage is correct but the DC measuring circuit is not measuring the voltage correctly and the microcontroller feels that the required voltage is not reached and trips the drive with F002. Here the most probable faulty board will be the PSU1/ PSU2 board. The IVI or the CUVC could also be the culprit.

I hope this will be helpful to you all.

I would like to have your valuable SUGGESTIONS and FEEDBACKS on this.

Also your RATINGS if you liked it.

DIWA

Dear Diwa,

First of all thank you very much for your great postings. Really wonderful.
I came across a similar problem with F002. (DC Inverter SIMOVERT VC6SE7041-2WL60-Z).
Later we found that one of the CT was faulty. To confirm,we put back the old CT and the same sysmptoms repeated.DC voltage at DC bus and cardterminal was OK.But while 'starting' the drive, a light hissing sound was heard and F002 was displayed.
Any experience like it?

Best Regards,
eskey.

Splitted from Common Faults in Masterdrives and their solutions..

Hi to everyone,

Related to all the possible solutions, unfortunately we couldn't get the exact solution. Then we try to open the driver and show that the rapid fuse is damaged. When you change the rapid fuse with a spare part 690V 25A 10x38 or 63A American Type fuses you will get the solution. We tried and now system is working well.