Earth Ground Test Fail

[Martin Helmersen]

I have tried everything I can think of, but all I get is Earth Ground Test Failed. My relays have been connected, and clicks when the board runs self tests. The AC out from both relays are connected to the AC test inputs. Some help please?

[chris1howell .]

Is the ground/PE on the OpenEVSE board tied to AC ground and J1772 ground?

On Sat, Mar 1, 2014 at 5:08 AM, Martin Helmersen <mhelm...@gmail.com> wrote:

I have tried everything I can think of, but all I get is Earth Ground Test Failed. My relays have been connected, and clicks when the board runs self tests. The AC out from both relays are connected to the AC test inputs. Some help please?

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[Martin Helmersen]

J1772 is not connected (just connected the simulator kit), and when testing I connected just 1fase with no PE, thought since the board dosent have any referance ground this dident matter... Will try with PE tomorrow :-)

[Martin Helmersen]

Just a thought: here in Norway (and some other countries in the EU) we dont have Terra Neutral mains, but instead Isolated Terra... Meaning my AC input will be 2 fases with current, and no neutral... Does this complicate things? And if so, can I re-program this earth ground check(

[chris1howell .]

Yes, you must connect the OpenEVSE board Ground(PE) connection to PE. The board does need a reference to PE for the pilot measurement and safety checks. The safety check sends a small current to PE to test both the path to PE and for a Stuck relay.

On Sat, Mar 1, 2014 at 1:53 PM, Martin Helmersen <mhelm...@gmail.com> wrote:

J1772 is not connected (just connected the simulator kit), and when testing I connected just 1fase with no PE, thought since the board dosent have any referance ground this dident matter... Will try with PE tomorrow :-)

[chris1howell .]

Neutral is not needed, OpenEVSE works equally well with split phase or single phase 230v. All you need is Hot, Hot and PE.

You do not need to reprogram to disable the safety checks, they can be disabled with a button and LCD. However, it is recommended that they stay on if possible.

On Sat, Mar 1, 2014 at 2:01 PM, Martin Helmersen <mhelm...@gmail.com> wrote:

Just a thought: here in Norway (and some other countries in the EU) we dont have Terra Neutral mains, but instead Isolated Terra... Meaning my AC input will be 2 fases with current, and no neutral... Does this complicate things? And if so, can I re-program this earth ground check(

[Martin Helmersen]

Ok, thanks Chris :-)

[Andrews Dauginas]

[Andrews Dauginas]

Chris,

I purchased OpenEVSE Basic/International Combo

  I have same problem in Ireland also is 220 VAC  and just 3 wires 1- Earth (ground)   2- Live   3- Neutral

I connected power and got Ground Test Faulth

Here is video and photo https://www.dropbox.com/sh/3sd4je3hbo97b1k/60-pqpuFLC

Need your help how connect correctly.

Thank you

Andrews

[chris1howell .]

Andrew,

You need connect AC test lines to the J1772 side of the relay. If they are left disconnected the safety checks will not pass.

Chris

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[Andrews Dauginas]

Thank you Chris

Now Test passed!
On display  Ready  L2:30A
EV not connected

I connected TEST pcb with resistors all modes work fine

Now I connected oscilloscope and I see graphics top are bit different like on yours photo  This is problem?

My oscillogram L2: 30A    1000Hz 



yours  30A   1000Hz   




My graphics  L2:24A






Also question

How connect charger to Nissan Leaf?

First insert Plug in to car and then power on OpenEVSE , Or first power on OpenEVSE and then plug in to car?
Second question is when I set OpenEVSE charging timer I have to turn OFF car timer?


Kind Regards

Andrews

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[Nicholas Sayer]

I can't quite figure out from the graphic... What's the volts per division and time per division scaling in that picture? Where is 0v?

What was connected to your J1772 pilot line when the capture took place?

When I last looked at a pilot signal that was "good," it was a really, really solid square wave with only a tiny bit of ringing at the very beginning of the top or bottom.

Almost certainly excursions more than 0.05 volts away from the "normal" level for the square wave are... questionable. The spec is broader than that, of course, but it really *should* be a *square* wave.

[chris1howell .]

Hi Andrews,

The scope graphics look a little off but its hard to say if it is the scope itself or settings. Most likely everything is just fine.

In general you should plug in OpenEVSE first. After self checks are complete, then you plug in the EV.

When using OpenEVSE timer you should turn vehicle timers off.

Chris