Roomba 530 Error 5

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Roomba 530 Error 5

Postby jgoodtx » May 9th, 2010, 1:28 am

I have ran a search on this subject and I have eliminated some issues. I have a 530 that is giving me the charging error 5. It gives me the code with and without the base. My PSU output is 22.5 VDC and the output on the Base is 2.8 VDC. The battery is reading 16.1 VDC. Everything I find says to replace the power supply. I cannot find a way to check the voltage under a load. I have a hard time buying a new one when the green light is working and the output is correct. Is there anything else I can check? I am fairly tech savvy and would like to fix it if I can avoid buying a new one. Thanks in advance.
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Re: Roomba 530 Error 5

Postby vic7767 » May 9th, 2010, 11:05 am

Although many have traveled this road, most wind up obtaining a new power supply.
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Re: Roomba 530 Error 5

Postby TechGuy » May 9th, 2010, 12:30 pm

I think the service manual is partially wrong to single out the charger is the only problem for Err5 error. The battery may generate the same error. The following is the proof.

From the 500 Series Roomba service manual for the Err5:
Power Supply Failed/Overheated or Roomba lost connection on Home Base
This occurs when the full charging current is below 400 mA for more than 30 minutes.


Those members, who uses Li-Ion battery with the 500 Series Roomba, are familiar with the Err5 charging error. It is due to the Li-Ion battery internal controller shuts off (disconnects) itself from the charging source when the cells are fully charged. In this case, it has nothing to do with the charger. One member had the same error and it was the battery problem.

A few weeks ago, I was dealing with a Scooba giving "Alarm + 4 beeps" error. It was a Ni-Mh battery. But it generated the same error as my Li-Ion Scooba battery.

From the Scooba service manual for "Alarm + 4 beeps" error"
Power Supply has failed
•Need to test the Power Supply and Scooba.


It turns out that this error has nothing to do with the charger. It is the battery itself.

Therefore, don't write off the charger yet since the OP said the charger no-load voltage is 22.5V. We need to test the battery.

[end of proof]

jgoodtx,
1. How old is your battery? If it is over 1 year old, you may need a new battery.
2. What type of battery are you using in your Roomba? Li-Ion or Ni-Mh?
3. If you have a Ni-Mh battery, do a load test on your battery with a car tail light bulb.
Last edited by TechGuy on May 9th, 2010, 12:57 pm, edited 1 time in total.
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Re: Roomba 530 Error 5

Postby jgoodtx » May 9th, 2010, 12:57 pm

The battery is the original battery for the Roomba. It is the Ni-Mh battery and it is at least two years old. This morning I removed the battery and it had a resting charge of 15.1 VDC. The Roomba was unplugged all night. I did not have a tail light but I used a license plate lamp bulb across the battery terminals and measured the voltage. The voltage dropped to 13.38 VDC.
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Re: Roomba 530 Error 5

Postby TechGuy » May 9th, 2010, 1:01 pm

I would say you need to replace the 2 years old battery.

What is the run time of your 2 years old battery before the Err5?

Your Roomba will not charge the battery after the Err5 error. You may charge your battery directly without Roomba.

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Re: Roomba 530 Error 5

Postby jgoodtx » May 9th, 2010, 1:37 pm

The run time was Roomba about an hour or so. I just cannot find in the manual or tech guide where it shows a bad battery giving the Charging error 5.
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Re: Roomba 530 Error 5

Postby vic7767 » May 9th, 2010, 2:28 pm

If the Roomba has been charging this battery for the past 2 years and now you are getting an err 5 then you have a charging error condition. This is caused by an interruption of the charging system. As TechGuy has suggested, you probably have a defective battery. The only way to verify this situation is to either purchase a new battery or a new charger since the err 5 error dectection software will not differentiate between the two devices.
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Re: Roomba 530 Error 5

Postby TechGuy » May 9th, 2010, 4:01 pm

jgoodtx wrote:The run time was Roomba about an hour or so. I just cannot find in the manual or tech guide where it shows a bad battery giving the Charging error 5.

That is what I said in my previous post in red. You will not find any reference of the battery in relation to Err5 in the service manual.

Change the battery directly without the Roomba for 15 minutes. If the battery can hold charge, it should run your Roomba for 10 seconds or longer.
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Re: Roomba 530 Error 5

Postby jgoodtx » May 9th, 2010, 6:20 pm

Ok well I charged it for 15 minutes. The battery voltage showed 22.4 VDC while charging so I think the charger is good. It ran for about 10 seconds and then the red light went on. It started blinking and stopped. I guess a new battery is in order? Thanks for the help
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Re: Roomba 530 Error 5

Postby jgoodtx » May 15th, 2010, 3:39 pm

I am happy to report that a new battery has fixed the problem. The power supply showed 22VDC when attached directly to the battery as shown in the above picture. This was my basis for trying the battery before the power supply. I bought one on Ebay and I am getting about an hour with it. Thanks for the help.
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Re: Roomba 530 Error 5

Postby PatchesTheCat » October 2nd, 2010, 11:55 am

I'm new here, but I believe from searching/reading/goofing that it seems this is my problem as well.

I have attached two pics showing my code.

I'll probably try the new battery idea.

Anyone think I'm way off base?
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roomba1.jpg
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Re: Roomba 530 Error 5

Postby vic7767 » October 2nd, 2010, 1:07 pm

You're not off base. The Err 5 is a charging fault. You could try directly charging the battery for a few minutes and see if the battery will run the Roomba for a short time. If so then your Roomba may require a new battery.
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Re: Roomba 530 Error 5

Postby SteveinMD » October 9th, 2010, 4:47 pm

I too have a Err5 error on a 8 month old 561

iRObot sent me a new battery and a device called an OSMO which apprently updated the firmware in my unit.

I get the same Err5 error when charging directly or via the dock.

The unit is under warranty but it sounds like my charging circuitry may be shot?

Thoughts?
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Re: Roomba 530 Error 5

Postby vic7767 » October 9th, 2010, 5:44 pm

If under warranty seek a replacement. iRobot provided international owners with the OSMO to resolve the err5 condition. Where are you located?
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Re: Roomba 530 Error 5

Postby SteveinMD » October 10th, 2010, 9:24 am

I'm in Maryland - yes I am currently in touch with iRobot.

Just a bit disappointed. If this had happened out of warranty - which I have no assurance it won't down the road - I would be seriously ticked off.
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Re: Roomba 530 Error 5

Postby SteveinMD » October 11th, 2010, 8:39 pm

Looks like I'm getting a replacement. I assume that this will be a refurb of some kind?
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Re: Roomba 530 Error 5

Postby mfortuna » October 12th, 2010, 7:21 am

I think Irobot sends out new cores for warranty replacements.
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Re: Roomba 530 Error 5

Postby SteveinMD » October 13th, 2010, 10:57 pm

I got a brand new 581 with everything except the battery.

Does anyone know the actual cause of the Err5 error? Is it a hardware issue - failing caps for example? I work for a firm that performs component level industrial electroinic repairs, I may pull the mobo out of the old one and check it out before I send it back.

Has anyone done this already?
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Re: Roomba 530 Error 5

Postby vic7767 » October 13th, 2010, 11:55 pm

Some work was done it that area. It had to do with the 500 models giving the err 5 at the end of the charging cycle of LI-ion batteries. It has something to do with the sudden shutdown of the charging current and the Roomba firmware does not understand that condition and shuts down with the err 5. Now it appears this same condition is happening on stock NiMH, and NiCD batteries. You might get a clue by monitoring the charging report that is sent out the SCI port during a charging cycle.
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Re: Roomba 530 Error 5

Postby SteveinMD » October 14th, 2010, 8:34 am

Vic, I looked at the charging circuitry on the mobo as best I can and all the transistors and diodes are good on a Huntron. If this is the case and there is no physical hardware damage, how can the firmware be reset?

Any ideas?
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