The red light is an indicator that the battery charge is below 20% under normal conditions. If you're sure the battery is fully charged and the dome isn't going through the left and right turn to calibrate you should recheck all of your wiring connections to begin with. Did R2 pass all the tests when you were putting him together?

Does he do anything else when you press the arms and ejector buttons?

I found out that you need to make sure you turn off the bottom main power switch when R2's not in use. I left mine on for about 3-4 days and the battery level dropped to the point of the red light coming on when I turned him on to use him, but he did self test without any problems though.

I found out that while the charger is plugged in, he doesn't do anything when you turn him on, other than his lights to indicate he's charging(flashing purple), and when he's fully charged(solid blue).

If you're not getting any dome movement, the first thing you should check is the dome motor wiring. All of the self checks have to pass or nothing will work.

There are parts that the instructions didn't tell you to do, like check the dome motor to make sure it works. It didn't even have you check both leg motors. Don't know why, but I tested everything.

Doesn't sound like fun, but you're going to have to recheck all of your wiring if everything passed the tests.

There's troubleshooting guide that pertains to the dome not moving: https://www.dropbox.com/...0Issues%20Guide.pdf?dl=0

My dome moves slowly to the right to the stop and then moves slowly to the left all the way to the stop, then it centers facing forward.

You'll also find out that if the dome is physically moved after he boots up, it will slam into the stops, which requires rebooting to cure.

I posted the troubleshooting link at the end of my previous post.

Sounds like you're on your way, good to hear!

If you can narrow it down to what the problem is and you need any parts, they'll send you them free of charge. Just call C/S and explain the problem. I'm waiting for a PCB from issue 99 because of connectivity issues

How's the head move now after you've booted it up a few times? Does it drive forward, backward, turn left, and turn right? Do the arms and ejector work?. It could be the stop sensors for the dome also?

I haven't had any problems getting replacement parts. I had to order issue 37 for a replacement ejector motor that was bad and it took almost 3 weeks. It's been almost 2 weeks now since I ordered issue 99 for the PCB, so it should be showing up this week.

Yeah, that center front wheel doesn't like any piled carpet, it's pretty small and doesn't want to turn.

There is a post on here somewhere that addresses the head issue you have, besides the trouble shooting guide, I seem to remember it having something to do with stop sensors and how to correct it?

Good luck!

Ok. I am not the expert R2 specialists here. I can only relate my experience.

I too, had the head slamming experience. As it turns out, it was the head motor that was at fault. I first had the MCU replaced and that was NOT the problem. I then replaced the head motor and that was it. It appears that what is happening it that that hall effect sensor on the motor is defective and can not detect the motor movement so it can not regulate the speed of the motor and just slams the motor full speed in the direction it is directed.

So, I would call customer service and have them send a replacement issue of #37 (I think). I would probably with until an admin or someone of more authority (Mark Warren?) gives you the go ahead.

Just MHO.
Fred

Hey! I got my first diagnosis right

If the head rotates when the power cable is in, then the motor should be okay. It is difficult diagnosing a problem as I’m not there to see what happens. Normally when you plug the power cable in, it should only charge the batteries, no head movement. It sounds like a cable mixed up on the MCU.
Also other things to check.
Do they have the required battery capacity. Over 2000 mAh capacity (recommended 2600-2800 mAh but can be over).
What colour light is shown when you start him up. Not with the power cable connected.
Just check the cables again, making sure they are the right way and the the pins are all in, particularly the cables in the MCU, making sure you have the right cables in the right slot.

The last thing to check is what power is coming out the battery box.
The link to the troubleshooting and how to check the power is here.
https://forum.model-space.co.uk/...aspx?g=posts&t=32756

Good luck

Mark

Don,t think they’ll need to social distance.