Roomba 540 no more light seems not charging too

Help & Support Domestic Robots
1

My Roomba 540 seems completely dead, no more light after putting on charging station, altough charging station shows a solid green light.

After several hrs battery still at 4.5V , battery is new also. When got the battery blinked on roomba for a few hrs then light went off.

Is there any repais or troubleshooting left to do ( I already tried to reset the charging sequence with removing the battery and holding the button for 30+ seconds)

Thanks

2

Hi tanks for the reply i Will test the charger tonight but i dont Know where to measure the 22v, perhaps on the terminals of the battery area right? Regarding connecting directly you mean from base to batterie terminal inside the robot, of so how Many amp wire minimum i need.

Tanks à lot anyway

3

Tested yesterday, the charger station reads 2.4V, seems fine, the robot charger reads nothing, tried to connect the home base directly to the robot, still delivers 2.4Volts only to the battery in that case.

I guess the robot charging system is dead, saw on some forum people that make their own bypass but seems above my electronic skills, i guess at this point, i need to know if changing the motherboard would fix the charging components as well or if the charging part is available fro purchase, if not i guess ill start digging a grave.

4

Just want to check if you have the spring contact well with battery. Then, check the battery working or not.

The cut off voltage of Roomba is 11.8V. You mentioned 4.5v sounds way low.

Or, you can google Roomba lithium battery for you. That helps.

5

Did you robot work well for a few minutes or seconds with the old battery? Or not at all?

You mention that you get nothing from the robots charger. Did you plug the charger into a wall outlet and measure the output voltage? One lead should go inside the charger and the other on the outside. You should then read 22V output. If not, we would recommend replacing the charger.

If the charger, battery and home base are fine, we would suggest replacing the motherboard.

6

Hi,

Have you tested the output voltage of the robots power supply and home base?

You should get 22V from the robots charger and 2.8V from the robots home base.

Can you try to plug the charger directly into the robot to see if this makes a difference ?