My last successful OBC repair (4.7 ohm resistors + snubber) is documented in this thread.
Last posts on page 84. https://myimiev.com/forum/viewtopic.php ... &start=830
From Sa 18.12.2021, my I-MIEV 2011 was charged without any problems until last week.
Now 4.7 ohm resistor broken again (but looks like new)
Before I mounted the OBC cover after the last OBC repair, I checked the heating of the 4.7 ohm resistors
during the normal charging start. Temperature rise only approx. 3 K.
Newly identified problem, for the failure of the 4.7 ohm resistors, is the relay coil connection on relay RL1.
My currently defective OBC:
Measurement at the freewheeling diode D301, (with resistance range !) infinite resistance (normal approx. 59 ohms).
Lightly pressing the relay on the coil side, then suddenly 59 ohms. Bad solder joint.
The problem was discovered by the German "I-MIEV repair Pope" elektrozitrone from the forum:
He's already fixed a few triplets with the same problem.
My current status:
Removed only upper circuit board. Defective relay surgically stripped. Save the PINs on the surface !
New parts coming this week. I will report with photos.