Roomba 595 no lights - not charging

I'm far from a Roomba expert and only clicked on your question out of curiosity given my background and as there was a similar question earlier Id passed.

A little research... Roomba NiMh battery pack is 14.4 v full charge. NiMh charging is a bit complicated, suffice to say it will eventually go well over 16V.

I would expect the charging station to have an initial charge voltage in excess of 12.5V. What I don't know is if its always on or waits to see if a load (roomba) attaches and then turns on its output.

So if you measured the power, contacts on the charger with a voltmeter and you get better than 12V likely its good, but really need to know what the voltage is when Roomba (with nominal battery pack) is docked.

Its likely the battery pack in the Roomba has a bad cell and will need replaced. You could measure the battery voltage but likely its low from not taking a charge. If its 14+ then the charger is working and the Roomba is misreporting.

Bad battery most likely. Could be a faulty charger too. Have your local vac shop test it.

It is possible for the charging system inside the roomba to call it quits. What I did to remedy this, since my roomba was out of warranty and I did not want to scrap it, was to buy a charging base on ebay. This charging base accepts different types of roomba batteries and even the scooba battery. The inconvenience is if you have a newer model roomba that has the battery inside, then you will need to remove the screws on the bottom plate to remove the battery. Hope this helps.

"The Charge Indicator Light is located immediately to the right of the power button on Roomba Red and Roomba (sage). On Roomba Discovery and Discovery SE, the Charge Indicator Light is incorporated into the power button. Please refer to the table below to determine what the Charge Indicator Light is telling you.

* Pulsing Amber - Charging
* Green - Fully Charged
* Amber - Partially Discharged
* Red - Almost Fully Discharged
* Flashing Red - Fully Discharged"
At the end of a cleaning mission, Roomba will tell you if it has successfully completed it's mission or not:

GREEN = MISSION COMPLETE

YELLOW = MISSION ABANDONED (Check robot's brushes, etc.)

YELLOW RED POWER BUTTON = BATTERY DEPLETED (Scheduler Models)

RED YELLOW POWER BUTTON = BATTERY DEPLETED (Discovery Models)
number of beeps after ?uh-oh? :

No beeps: A wheel is stuck or is not touching the ground. Pick up the robot, place it down securely on the floor and touch the clean button to restart the cycle.

1 beep: The main brushes cannot turn. Turn over Roomba and remove the brush guard by pushing the two yellow tabs. Remove the brushes, clear any obstructions, and replace them again.

2 beeps: The side brush cannot turn. Turn over Roomba. Look to see if something is wrapped around the side brush. Remove the side brush with a screw driver and check for string or hair that may be wrapped around it.

3 beeps: The vacuum cannot run Remove and empty Roomba?s bin.

4 beeps: A wheel motor cannot run Your Roomba may be stuck or something may be wrapped around a wheel. Look for something wrapped around the wheels. Push them in and out and make sure they turn easily.

5 beeps: The cliff sensors have failed or are blocked. Turn over Roomba and clear any debris that might be caught underneath the front bumper in the cliff sensors. You can also use compressed air to clean them out.

6 beeps: Wheel obstruction or robot attempting to drive over an obstacle. Turn over Roomba and remove any obstructions that prevent the wheels from seating all the way up into Roomba?s body. Also, remove any obstacles that Roomba could drive over.

7 or 8 beeps: Not applicable Roomba?s beep codes do not include 7 or 8 beeps. If you are getting an error with 7 or 8 beeps, try counting again or contact iRobot Customer Care.

9 beeps: Sensor error Please contact iRobot Customer Care.

10 beeps: Roomba is stuck Pick up Roomba and start it again somewhere else. Use a virtual wall or other barrier to keep Roomba away from the
place it got stuck.

Your Roomba may be experiencing an issue where the battery is deeply discharged and may need to charge longer than the standard 3 hours. (or 7 hours if you have a standard charger)

Even with the charging light showing green (this indicates a fully charged battery) the robot is still charging. If your Roomba exhibits behavior where it charges for a short time then runs for a short time you will need to do the following.

1. Plug the charger into Roomba (if you have a home base be sure to plug directly into Roomba instead of using the home base, this will ensure the robot's charging cycle is not interrupted.)

2. After the Roomba's charging indicator goes to solid green please keep the Roomba on the charger for an additional 72 hours. (3 days)

3. After the 72 hours (3 days) has passed, turn your Roomba on and begin a normal cleaning cycle. If this works successfully it may take several uses for the battery to get back up to the performance it once had.

If this does not correct the problem, please call customer support at 877-855-8593

To extend Roomba's battery life and keep Roomba cleaning at peak performance: • Always keep Roomba plugged in when not in use. • Recharge Roomba as soon as possible. Waiting several days to recharge Roomba can damage the battery. • For storage off the charger, remove the battery from Roomba and store in a cool, dry place. • Blue or black batteries should be stored after Roomba has been used. • Yellow batteries should be stored after being fully charged.
16-Hour Refresh Charge If Roomba has been left off the charger for an extended period, Roomba will initiate a special 16-hour charge cycle. This extensive charge refreshes Roomba's battery and extends the battery life. While charging, Roomba's "Clean" button will pulse quickly. Note: For best results, do not interrupt this Refresh Charge.

Happy Holidays The FixYa Team

use a multimeter to test if it is actually putting out a charge. Is this a regular roomba charger with the green led on top? And it just doesnt light up anymore? If so then the pack is dead. replace it.

There's a chance that the battery you bought is bad. There's a greater chance that the problem is with the charger. If you're using the dock to charge, try plugging the charger directly into the roomba just to rule that out. If that doesn't fix the problem, I would try borrowing or buying a new charger, and see if that works. If a new charger and new battery don't solve the problem, the problem must be with your roomba itself.

If the charger doesn't light up, it's broken.

Call customer support at 1-877-855-8593. Be sure to have the Roomba and charger with you when you call-- you'll need them.

Try resetting your Roomba by removing the battery, unplug the charging connector, hold down the Power button for 30 seconds. This will reset the charging system, replace your battery, connect your charger and see what happens. By the way do you also have a homebase ? If so try that too

Is the power light pulsing when on charger? Make sure you have the battery in correctly and snapped securely into place. Only charge on the home base, do not plug in directly.