Leaf stack gen 2 precharge problem

[manj3000]

Hi I'm using a 2017 gen2 leafstack with the zombieverter and I'm getting a pre charge fail.

I have tested the pre charge fuse, the positive contacter let's out power but the negative contactor is not so not getting pre charge.

Been going around in circles and can't seem to find out why it's not working. Is the zombieverter ment to have a gen2 in the drop down list as mine hasn't.

Prams attached

[tom91]

Please provide more information, like wiring, battery used, spot values during all stages ect.

[manj3000]

Hi using the complete system from the leaf, batteries, motor, inverter and PDM.

I'm only getting 2 - 4v on udc when I switch for precharge.

[tom91]

Print screens please not pictures. You can have the browser "print" the page to pdf for easy review.

Everything needs to be wired properly. Is the battery communicating and wired correctly?

[manj3000]

Sorry attached spot when I click pre charge

I got 380v going to the JB

And I think all the 12v is wired up correctly, I know it is to the bms and going to double check stuff to PDM and inverter

[tom91]

Your contactors cycling correctly? You need to have negative close first, then precharge. Voltage comes up and then positive closes. Precharge remains closed.

UDC2 should read your battery voltage from the BMS, spot value shows nothing. Your UDCsw will get set based off of this voltage.

[manj3000]

When I toggle for precharge and measure voltage on contractors I get nothing from negative contactor but 190v on positive contactor, pre charge relay clicks.

I have 390v on the battery side of contactors

I traced all cables back to the vcu and all contactor cables are correct, in getting 12v to contactors

Could be 12v wiring going to pdm and inverter which will double check.

[tom91]

Measure the coil voltages that are driving the contactors.

If you are uncertain of the operation of the contactors DO NOT have HV connected.

[GregFordyce]

... I get nothing from negative contactor but 190v on positive contactor, pre charge relay clicks.

I have 390v on the battery side of contactors ...

Are you using the service plug from the Leaf pack and is it fitted correctly?

[manj3000]

Hi yes using the service plug all wired up with current sensor. Getting power to the contactors. Gonna test the contactors today make sure there working OK and the pre charge resistor.

[tom91]

https://openinverter.org/wiki/ZombieVer ... tor_wiring

Zombieverter pulls the contactors low to turn them on so the other side should be wired to 12V.