Question about iRobot Roomba 4210 Bagless Robotic Vacuum

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4210 and 4230 won't charge-new batteries.

Won't charge on their own docks nor a brother's dock. Must charge battery in other Roombas and transfer--runs & cleans great w/ charged battery; just won't charge itself. Sits on dock for days glowing red--hit the clean button and it's dead.. The charging problem seems to be in the robots themselves--have 4 of them and all docks are fine. HELP!

Posted by Anonymous on

  • Anonymous Jul 02, 2009

    problem has been solved with new chassis for both.

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I've been having the same problem myself. The charger is apparently built into the roomba main board. From what I've read there are two MOSFETs U2 & U4 that can go out and require replacement to fix the problem. More info here
http://www.robotreviews.com/chat/viewtopic.php?f=1&t=3909

Posted on Jul 08, 2009

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Amber flashing light while on home base. New, pulled tab, placed on dock. First time said charge err1, took out battery and replaced. Now just flashes amber. Is this correct?


Your manuals are here. Flashing lights must be covered. A quick look at the site says flashing red is bin full. In fact, I found it. Flashing Amber is CHARGING.

Roomba 600/500 Battery and Charging Overview On some robots, the CLEAN light should pulse red/amber while charging. ... Amber - partially discharged; Red - nearly discharged; Flashing Red - discharged . homesupport.irobot.com homesupport.irobot.com/.../roomba-600%2F500-battery-and-charging- overview LabeledSupport ... clipped from Google - 12/2015 iRobot: Customer Care - Roomba 700 Anatomy homesupport.irobot.com homesupport.irobot.com/app/answers/.../a.../roomba-700-anatomy images?q=tbn:and9gcss8oogw3vmcv_uom0z_pxoi9q5tq9n4aqrcwbsxn0zd1blfvnacictdbyn iRobot: Customer Care - Roomba 700 Anatomy Solid Red = Battery Discharged; Amber Pulse = Charging; Solid Green = Fully Charged; Quick ... The battery indicator blinks when there is a charging issue. homesupport.irobot.com homesupport.irobot.com/app/answers/.../a.../roomba-700-anatomy LabeledSupport ... clipped from Google - 12/2015 iRobot Roomba 500 Series Battery Maintenance homesupport.irobot.com homesupport.irobot.com/ci/documents/.../042809_500MaintBatt_vib iRobot Roomba 500 Series Battery Maintenance Roombas "CLEAN" light should pulse red/amber while charging. ... Green - fully charged; Amber - partially discharged; Red - nearly discharged; Flashing Red - ... homesupport.irobot.com homesupport.irobot.com/ci/documents/.../042809_500MaintBatt_vib LabeledSupport ... clipped from Google - 12/2015 Roomba 400 Series/Discovery Battery and Charging Overview homesupport.irobot.com homesupport.irobot.com/.../roomba-400-series%2Fdiscovery-battery-and- charging-overview Roomba 400 Series/Discovery Battery and Charging Overview Your Roomba's POWER light should pulse red/amber while charging. ... Amber - partially discharged; Red - nearly discharged; Flashing Red - discharged. homesupport.irobot.com homesupport.irobot.com/.../roomba-400-series%2Fdiscovery-battery-and- charging-overview LabeledSupport ...

iRobot Owner Manuals and Quick Start Guides

Dec 31, 2015 | Roomba Vacuums

1 Answer

Why is there no green light or red docking showing it is charging?


Sometimes the contacts between the battery and the iRobot get corroded...you can try using a small piece of sandpaper to lightly scuff/clean the battery contacts. Once you put it back together, try the reset function mentioned previously.

May 26, 2015 | iRobot Roomba 530 Robotic Vacuum

1 Answer

Roomba undocks and then immediately redocks


I don't know much of anything about roombas, but that sounds to me as though the battery is not holding a charge. Check the voltage to see if it is normal. If not, I would replace the battery.

Mar 28, 2014 | Vacuums

2 Answers

I roomba wont dock


That's usually caused by a charging issue. Could be that the contacts the roomba uses to charge on the base are bad or the contacts on the roomba its self. Here is a good troubleshooting guide. Roomba customer service is very good too, if the roomba is less than a year old they will repair it for you. good luck!

Jul 19, 2013 | Vacuums

1 Answer

Stops


I had the same problem when I renovated my kitchen. With boxes of stuff everywhere it was impossible to use Roomba. When I tried to use it again a few months later, it would stop after only a few minutes work. I had to buy a new battery which cost in excess of $100. Its better to loan it to a friend to be used than to put it into storage.

Apr 30, 2013 | iRobot Roomba 530 Robotic Vacuum

1 Answer

Irobot roomba 500


If you're sure the battery contacts are clean and the battery really is charged, then there is faulty circuitry within the Roomba that would have to be repaired or replaced.

Confirm that the battery is inserted with the metal contacts down so they make contact with the spring terminals in the battery compartment.

Visually confirm that the metal contact plates on the battery pack, and the spring terminals in the battery compartment are clean and shiny. If not, wipe with a clean cloth or paper towel, its OK to use a little water or rubbing alcohol on the cloth, if needed, and then dry it.

Visually confirm that the metal contact plates on the Roomba, and the spring terminals on the docking station's home plate are clean and shiny. If not, wipe with a clean cloth or paper towel, its OK to use a little water or rubbing alcohol on the cloth, if needed, and then dry it.

If you have a volmeter, measure the voltage between the contacts on the battery pack If it isn't something in the neighborhood of 14 volts and is 11 volts or less, the battery isn't fully charged.

Reinstall the battery.

For the moment, please connect the power adapter directly to the Roomba rather than the docking station to eliminate one possible faultly connection.

If the battery wasn't fully charged, or you weren't able to test it, try to charge the Roomba and then retest the battery voltage if you can. If the battery voltage was higher immediately after charging, but didn't get to 14 volts, the charger is good, but battery needs to be replaced. If the battery voltage was unchanged after attempting to charge the Roomba, the charging circuitry may be faulty. If there was no light patterns when you tried to charge it, and it was plugged in to a good outlet, then the power adapter or charging circuitry is definitely bad.

If you have no voltmeter and you cleaned the contacts and tried to charge the Roomba and it works, use the Roomba and then recharge using the docking station and see if it was just dirty contacts or it won't charge through the docking station. If it didn't work, you'll need to figure out if its the battery, the charging circuitry in the Roomba, or the power adapter. If there are no lights when you try to charge the Roomba, then Either the power adapter or the Roomba power circuitry is defective, but without a voltmeter you can't find out which one, and there's no way to know if the battery is good or bad, but you know Roomba wasn't trying to charge it. If there are lights when you try to charge the Roomba, then at least you know the power adapter is good. Unfortunately, without being able to test something there's no way to distinguish between a charger that won't deliver a charge to the battery and a battery that won't accept a charge. If you want to take a guess then a bad battery is more common and less expensive to fix.

Jul 07, 2012 | iRobot Roomba 560 Robotic Vacuum

1 Answer

My roomba 530 cleans just great, but it will not return to the docking station--it just stops in the middle of the floor without any warning. I push the dock button, etc. to no avail.


I sometimes have the same problem with my Roomba 530 (named Ethel). Make sure the signal transmittor on the docking station and the signal receiver on the top of the Roomba are clean. You can use a cloth or paper towel with a SMALL amount of window cleaner to run around both of these signal devices. I also like to clean the metal contacts on the station and the corresponding contacts on the bottom of the Roomba at the same time. This won't make a difference for the docking but it just assures that the vacuum will charge efficiently. If this doesn't work, you might need to have the unit cleaned professionally unless you feel comfortable about taking the unit apart and cleaning it yourself. I did this and Ethel has worked fine ever since!
If this helps, please come back and rate my suggestion!

Jun 06, 2011 | iRobot Roomba 530 Robotic Vacuum

1 Answer

I think the battery is not holding its charge anymore. The red (charging) light does change to green but only runs a few yards on leaving the dock.


You have dead nimh (nickle metal hydride) batteries2_bing.gif.
You will need a replacement. You can test for this by removing the battery and holding the power button for 15 seconds. This will restart the charging cycle as if the battery were new.

Mar 04, 2010 | iRobot Roomba 560 Robotic Vacuum

1 Answer

My Roomba Discovery doesn't appear to hold a charge


cor2an,
That sounds like a classic battery failure in the Roomba discovery series. There are sensors inside the battery pack that go bad too. Either way...it's not very practical to repair the battery....the best shot you have would be to order a replacement battery. You just pop the old one out and then put the new one in.

They are available from iRobot for $69 at this link: http://store.irobot.com/product/index.jsp?productId=2799714&cp=2804606.3358509&ab=CMS_AccSuper_Roomba400_102308&parentPage=family

There are sources of less expensive (about $35) Genuine iRobot quality batteries also. You could try www.RoboticVacParts.com at this link: http://cgi.ebay.com/OEM-iRobot-APS-battery-Roomba-400-4XXX-Discovery_W0QQitemZ270412120603QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item3ef5d1821b&_trksid=p4634.c0.m14.l1262&_trkparms=|301%3A1|293%3A1|294%3A30

Jun 21, 2009 | iRobot Roomba Discovery SE Bagless Robotic...

1 Answer

My Roomba does not want to dock


Need more info.
Does the unit go into search mode? "SPOT & CLEAN" flashing? It actually tries to search?
Do you have another roomba to test your dock on to see if IT will dock? If it tries but just cant, then either the dock transmitter, or the roombas receiver is dead. (The round antennae thingys on the dock and the bumper) replace these would be the first point.

Jan 21, 2009 | iRobot Roomba 4210 Bagless Robotic Vacuum

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