Dcdc converter died maybe?

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DkubusEV
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Dcdc converter died maybe?

Post by DkubusEV » Sun, 30 Sep 2018, 14:02

Hi my name is mike, I'm in South Australia and have an Imiev project (transferring Imiev running gear into classic car) I've just charged my donor car for the first time since getting it, (was working fine prior) and now I have no output from the DCDC converter and have the battery symbol and vehicle with explanation mark symbol on the left side of my dashboard.

If I'm not mistaken this means my symptoms seem to be pointing towards a DCDC converter problem of some type.

If anyone is good at diagnosing this type of situation please reach out and let me know. I've tried disconnecting the 12V battery and giving it a good charging over night to make sure that's not falsifying the symptoms... all external "serviceable" fuses are in working order so...

Thanks in advance to anyone that may be able to assist me find the answers.

Cheers
Mike.


Cheers 🍻
Mike.
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coulomb
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Re: Dcdc converter died maybe?

Post by coulomb » Sun, 30 Sep 2018, 17:00

DkubusEV wrote:
Sun, 30 Sep 2018, 14:02
all external "serviceable" fuses are in working order so...
Does that include the fuse for the charger and DC-DC that is actually located under a cover in the motor controller? It's a 20 A 450VDC sand filled (I think) fuse that bolts in.

Edit: the DC-DC units are pretty tough, and seem to give little trouble, as long as they get battery power through that fuse.
Learning how to patch and repair PIP-4048 inverter-chargers and Elcon chargers.

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DkubusEV
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Re: Dcdc converter died maybe?

Post by DkubusEV » Sun, 30 Sep 2018, 19:40

No so far I've only checked fuses in fuse boxes (no bolted covers) are you talking about the main inverter box directly above the motor itself?

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Mike.
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coulomb
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Re: Dcdc converter died maybe?

Post by coulomb » Sun, 30 Sep 2018, 21:26

DkubusEV wrote:
Sun, 30 Sep 2018, 19:40
are you talking about the main inverter box directly above the motor itself?
Yes. In the original iMiEV, it would have been to the right of the charger/DC-DC box [ Edit: Looking from the back of the car. ]. My understanding is that the fuse is moderately easy to get to. I'm not an iMiEV owner, just an interested observer.
Learning how to patch and repair PIP-4048 inverter-chargers and Elcon chargers.

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Re: Dcdc converter died maybe?

Post by mark_hetho » Mon, 01 Oct 2018, 06:03

It's a common symptom of a failure in the charger/DC-DC unit. Sometimes just the fuse goes, but an increasing number of imiev's are seeing burnt out capacitors within the charger unit. Not sure which way the causal relation goes. The fuse is a good first port of call though.

Beyond that, you may want to read into this:
http://myimiev.com/forum/viewtopic.php?t=4079

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DkubusEV
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Re: Dcdc converter died maybe?

Post by DkubusEV » Tue, 02 Oct 2018, 12:13

My PEC 20A DC450V fuse is open circuit.

Anyone have a good supplier for these? For now I've ordered one from Mitsubishi dealership to see if it fixes the problem?

Will update as soon as I know.

Cheers 🍻
Mike.
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DkubusEV
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Re: Dcdc converter died maybe?

Post by DkubusEV » Thu, 04 Oct 2018, 13:24

Received the replacement fuse today and installed, all seems well now (no warning ⚠️ lights 👌🏻 ) however I haven't yet tried to charge the car. Seeing as how last time this is when it happened...

We will see how long this fuse lasts?...

Cheers for all your help guys.
Mike
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