SAMSUNG BUBBLEWASH VRT BLDC INVERTER MAIN CONTROL BOARD

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Grant080627

Joined Apr 17, 2022
1
Hi All!
- FLUCTUATING & LOW DC VOLTAGE ON ALL PHASE WIRES TO MOTOR

Im currently working on an 11kg Samsung VRT front loader. It uses a 3phase BLDC motor. I've tested the ohms resistance across each or phase wires on the motor, so that checks out ok. I checked the voltage coming from the main board and its showing a fluctuations in voltage across all three phase wires between 0 and 80V DC.

I pulled out the main board and I took a look at the high power side and what looks like a capacitor seems bulged.. I'm trying to identity it but can't find what it is. I'll take some close up pics. Also, if anyone knows what other components might need replacing here, I'd also appreciate any help :)

Cheers
 

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twohats

Joined Oct 28, 2015
289
Have a look on YouTube.. On our samsung washer there is an extra bit amongst the motor coils with an ic on it.
Also the ic next to the large electrolytic capacitor (Offline ic), can give the machine totally dead symptom.
Just my observations.
Good luck.............
 
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