tm_chom_dy
Newbie level 4
Dear Colleagues,
I need your help for this Danfoss VFD. Owner brought that VFD from previous service workshop which they didn't fix it.
When it arrived to me, I found that Gate drive components of U section was burnt. Then I replaced it and checked all components and IGBTs too.
All are ok. So I'm going do the test run. But I found that there was one snubber capacitor of U section was not included ( please check my attached photo).
There are two snubber capacitors ( each in V and W section). May be snubber for U section was left in previous workshop or I don't know.
I would like to know that is it ok without that snubber or I need to find new one for U section.
I need your help for this Danfoss VFD. Owner brought that VFD from previous service workshop which they didn't fix it.
When it arrived to me, I found that Gate drive components of U section was burnt. Then I replaced it and checked all components and IGBTs too.
All are ok. So I'm going do the test run. But I found that there was one snubber capacitor of U section was not included ( please check my attached photo).
There are two snubber capacitors ( each in V and W section). May be snubber for U section was left in previous workshop or I don't know.
I would like to know that is it ok without that snubber or I need to find new one for U section.