Roomba 530 - Runs a few seconds and gives up!?

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Roomba 530 - Runs a few seconds and gives up!?

Postby PaulyD » January 2nd, 2013, 2:21 pm

Hello All,

Any thoughts on this? I'm helping fix the in-laws (!) Roomba 530. We start it from a green Clean button on the dock and it gets between 3 and 10 centimeters before giving up.

When it gives up it sits there with the clean button flashing green (all others off), it plays what sounds like a happy tune (6ish notes, all rising), and then briefly tries to start again (the motors/fans whir for a split second). It then repeats until you either turn it over or sometimes after a while it goes silent and flashes a red clean button. If you drop it back on the dock it just starts again (no need to press a button, off it goes) until it gets off the dock and the above repeats.

I assumed this was a bad battery and stuck in a spare I had - but it's exactly the same. Perhaps gets a few more centimeters with the new battery, even turned around once, but that's it.

Could I have two bad batteries (the "spare" has been sat on my shelf for a year or two since I bought it to fix my Roomba and it turned out to be needed)?

Or does this sound more terminal?

I've checked everything else, sensors look clean, wheels are free of debri and turn freely, etc.

Please, help me win favour with the in-laws! ;)

P
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Re: Roomba 530 - Runs a few seconds and gives up!?

Postby iMayne » January 2nd, 2013, 2:28 pm

You just may need a new battery. Try holding down both buttons: spot and dock until the robot restarts. But you need a new battery or a charger that can recharge nimh batteries.
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Re: Roomba 530 - Runs a few seconds and gives up!?

Postby theirobotchannel » January 2nd, 2013, 2:33 pm

I think definitely you need new Battery
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Re: Roomba 530 - Runs a few seconds and gives up!?

Postby PaulyD » January 2nd, 2013, 5:00 pm

iMayne wrote:You just may need a new battery. Try holding down both buttons: spot and dock until the robot restarts. But you need a new battery or a charger that can recharge nimh batteries.


Thanks for the advice!

I've tried the reset, but that makes no difference. I'm thinking new battery too, but what do you mean by a charger? I could rescue the batteries I have with an external charger?
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Re: Roomba 530 - Runs a few seconds and gives up!?

Postby iMayne » January 2nd, 2013, 5:30 pm

PaulyD wrote:...I've tried the reset, but that makes no difference. I'm thinking new battery too, but what do you mean by a charger? I could rescue the batteries I have with an external charger?

Those chargers are not your "normal" charger. Those are professional charger. Just do a google search for nimh battery charger.
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Re: Roomba 530 - Runs a few seconds and gives up!?

Postby vic7767 » January 2nd, 2013, 6:17 pm

Here's a great little smart charger with a thermal sensor. I use it to charge up my Roomba and Scooba batteries.

http://www.onlybatteries.com/showitem.a ... 2&uid=1041
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Re: Roomba 530 - Runs a few seconds and gives up!?

Postby Jubo » January 2nd, 2013, 9:39 pm

Is the 6ish sound you describe like the sound when you do a reset or when putting in a new battery? If it is, you could have a problem with the motherboard instead of the battery. The way you described sounds like roomba is always resetting itself.
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Re: Roomba 530 - Runs a few seconds and gives up!?

Postby vic7767 » January 2nd, 2013, 10:23 pm

PaulyD wrote: If you drop it back on the dock it just starts again (no need to press a button, off it goes) until it gets off the dock and the above repeats.
There is a small dome button that may have collapsed located under the clean button. When you press the clean button is there any tactile movement ?
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Re: Roomba 530 - Runs a few seconds and gives up!?

Postby rush » January 3rd, 2013, 7:47 pm

Guys, my Roomba does the same thing...

Walk off the dock, turn around, start forward and then sings the tuu-tuuuuruu-ruu sound, flashing red light....

Battery dead?
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Re: Roomba 530 - Runs a few seconds and gives up!?

Postby vic7767 » January 3rd, 2013, 8:49 pm

One sure way to determine the health of the battery is to measure to fully charged voltage level 16.5 to 17 vdc and then apply a 2 amp load to the battery. Observe the time frame from starting the load test until 12 vdc is reached. If the result is at least an hour or more then the battery is good to go.
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Re: Roomba 530 - Runs a few seconds and gives up!?

Postby rush » January 4th, 2013, 7:49 am

Vic, the seller does not mention anything about protection...
Here is the product page:
http://www.aliexpress.com/item/Free-shi ... 99459.html

To make a load of 2A on battery, should i use a 8 Ohm resistor?
V = R I
14.4V = R * 2
R = 7.2 ohms
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Re: Roomba 530 - Runs a few seconds and gives up!?

Postby mfortuna » January 4th, 2013, 8:07 am

You can use 1 or 2 automotive tailight bulbs as well.
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Re: Roomba 530 - Runs a few seconds and gives up!?

Postby rush » January 4th, 2013, 8:15 am

mfortuna wrote:You can use 1 or 2 automotive tailight bulbs as well.


Perfect... Those brake light bulbs are 21W...
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Re: Roomba 530 - Runs a few seconds and gives up!?

Postby TechGuy » January 4th, 2013, 1:29 pm

PaulyD wrote:...

When it gives up it sits there with the clean button flashing green (all others off), it plays what sounds like a happy tune (6ish notes, all rising),


Is the happy tune played when you put in the battery?
Remove the battery and put the battery again. Please report back.

and then briefly tries to start again (the motors/fans whir for a split second). It then repeats until you either turn it over or sometimes after a while it goes silent and flashes a red clean button. If you drop it back on the dock it just starts again (no need to press a button, off it goes) until it gets off the dock and the above repeats.


If the tune is the battery installation tune, the +5VREG is cut in and out.

Measure the resistance of R138. If it is more than 1 ohm, replace it.

Soon after the +5VREG is restored and the battery installation song, the high current going through the R138 produces large voltage drop across the R138. As a result, the voltage input to the Buck Converter circuit will be lowered to the point that +5VREG output is cut off. Without +5VREG, MCU will shutdown.

As soon as the current going through the R138 is lowered, the proper input voltage is restored to the input of the Buck Converter which in turn restoring the +5VREG. MCU is reboot and then the battery installation song... The whole sequence of events will be repeated over until you take the battery out.
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Re: Roomba 530 - Runs a few seconds and gives up!?

Postby sharkboy » May 22nd, 2013, 3:37 am

is this the tune: http://www.youtube.com/watch?v=hj0eW4ydV78

Look around the 1:30 mark - is it like an increasing tune? This is the re-set tone and my 530 keeps doing (by it self) over and over again.

Whats causing that?
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Re: Roomba 530 - Runs a few seconds and gives up!?

Postby vic7767 » May 22nd, 2013, 10:19 am

Did you check R138 ?
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Re: Roomba 530 - Runs a few seconds and gives up!?

Postby TechGuy » May 22nd, 2013, 11:46 am

sharkboy wrote:...
Whats causing that?


Read my explanation on my post just before your post. Measure R138. If it is greater than 1 ohm, replace it.
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Re: Roomba 530 - Runs a few seconds and gives up!?

Postby sharkboy » May 27th, 2013, 7:17 pm

Thanks - will checkout that resistor. Its been a few years but i'll see if i can find my solder gun :)
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Re: Roomba 530 - Runs a few seconds and gives up!?

Postby sharkboy » January 5th, 2014, 8:29 pm

just some feedback regarding the 6 note tune - before you start attacking the motherboard with a solder gun - double check your battery.
The new battery i bought off eBay did not have same Ah rating as the original Roomba one. I suspect that is why is kept resetting itself every 2 minutes.

I sourced a new identical battery (same V and Ah), charged it and roomba is now running like the day it was born.
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