Hello etroup
if you look at the voltages you would already understand that your Tempest is depleted. It won’t start unless it gets a charge
I just looked at your station and it really never charged properly since quite some time, I suspect a faulty charge circuit or to much battery drain. If you could get it in direct sunlight for a few hours, there is a chance it comes live again but for sure it won’t last long.
Open a support ticket and customer support will help you out.