CP and PP would not cause a "No Ground" error.
A bad PP would cause the vehicle not to detect the charge handle.
A bad CP would cause the station not to detect the vehicle. Station would be stuck at "Ready"
The "No ground" error is caused by either an actual missing earth ground (the intended purpose of the safety feature) or a false positive when the relay fails to close when commanded. The relay may not close because of electrical issues such as a poor connection or a bad output or mechanical resistance/blockage.
The image we posted of the retaining ring was done with the retaining clip removed (blue arrow on image below). The inspection can generally be done by looking between the layers, however it is very easy to remove the clip.
I will remove the clip and look at the ring.
Something we did fairly early on was to apply 12V to the relay coil, I remember it giving a satifying KLAK - whereas ( although it may be muted by the box ) the relay makes a rather dull sound on connecting now.
The OpenEVSE store is not at all familiar with the EU versions of firmware you are running.
We would suggest going back to the version 7.1.3 as shipped on your hardware, located here:
We have received some reports of issues with the 8.x firmware and have not started shipping any hardware with 8.x, until the issues are identified and resolved.
With regard to the firmware, I only applied that version of the firmware because I was having issues
I will re apply 7.1.3
We have spent the morning searching for information about Firmware 8.2.0. It seems there are numerous reports with issues for both GFCI Faults and "No Ground" errors on 8.2.0. All issues were resolved by going back to 7.1.3.
We were going to report the issue to OpenEnergyMonitor, the organization that maintains the EU version of OpenEVSE firmware. Their latest release is 7.1.3_EU, it looks like 8.2.0 was either not officially released or removed.
At this point, we would suggest going to 7.1.3.
@Antony - Programmers are now in stock, we just kitted up 100 pcs.
Any 6 pin Atmel AVR compatible programmer will work.