ALTIVAR 11 - model ATV11HU29M2A

Thread Starter

musanss

Joined Dec 5, 2020
5
Hello ,

I am having some issues with the altivar 11 with the fault code : "ovf"
Already checked the motor , and tried the drive without the motor and the result was the same .

Thank you !
 

Thread Starter

musanss

Joined Dec 5, 2020
5
@MaxHeadRoom
It starts for about 20-40 seconds then shut-downs the Altivar with code : "ovf" ..
Also I checked the thermal state: when it's greater or equal to 118 It tricks the drive to "ovf"
 

MaxHeadRoom

Joined Jul 18, 2013
21,984
Has the drive been in operation before OK or just after commissioning?
If the supply is OK and correct voltage, it may have a BJT short if it still shows OLF with no motor connected.
Max.
 

Thread Starter

musanss

Joined Dec 5, 2020
5
@MaxHeadRoom
The drive operation before was OK , supply is OK , also the correct voltage .
Im attaching some images
(I believed that the MOSFET IRFBC20 was the problem but after testing it without the circuit It was resultet OK)viber_image_2020-12-05_19-16-48.jpgviber_image_2020-12-05_19-16-51.jpg
 

MaxHeadRoom

Joined Jul 18, 2013
21,984
Did you test them all?
There normally is six, either BJT or Mosfet.
If the error shows with no motor, it is generally a short or O/L on the output somewhere.
Max.
 
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