vic7767 is right about doing a liquid purging (search for "turkey baster") of Scooba's pump, since one reason Scooba lights the CheckTank warning is it "thinks" the Tank's Clean chamber is empty.Higher Than the Sun wrote:...When I'd initially turn the power on and press "clean" it would sound like something was whirring up (a soft sound), and then the sound would sort of tone down, and then stop - that's when Scooba would give the error beep and the "check tank" light would come on.
Pushing Scooba should have nothing to do with making it start a mission! OTOH, giving a a sharp rap, or bump, might indicate existence of an intermittent connection going to the pump-motor (that sort of thing used to be a popular fault).I found that if you give Scooba a little push (very little push; you don't need to start rolling it forward) then it'll take off and go through a cycle on its own. ...
Normally: a) the pump (that whirring sound) starts before anything else and you hear that sound for three or four seconds, but the pump's sound is then drowned out by the louder noise of Scooba's blower-motor spinning up (the noisiest Scooba sub-system)! b) Scooba will start its initial spiral sweep and you should see a solution trail behind it. If liquid is not leaving the Clean chamber, it can't wet the sensor to tell the controller its OK to start the blower and wheels running, so you should check the above items....I'd initially turn the power on and press "clean" it would sound like something was whirring up (a soft sound), and then the sound would sort of tone down, and then stop ...
You know you have adequately purged (its not really equivalent to "priming", such that a pump is able to create suction) when you observe liquid squirting out of both jets, i.e., jets which are indicated in this image:Higher Than the Sun wrote:I did prime the pump rather extensively -
That's normal....The first time I pumped the bulb there was a fair bit of resistance, and after that there was no resistance.
That is not normal.... when the Scooba did finally get going, it didn't put any liquid down for the first minute or so.
Internal Drying Mode.It wasn't in "head drying mode" (or what ever it's called -
Yep! About normal there!...Ultimately it put down liquid properly and sucked it up fairly well - no worse than some people have shown in pictures here, anyway. At the end of the cycle the cleaning tank was empty, and the dirty tank was 1/4 to 1/2 filled with dirty water. ...
You are welcome, and you might benefit by scanning all pages of Scooba-5900 Technical, if you like 'anatomy'.Higher Than the Sun wrote:Thanks for the diagram showing where both spray jets are - always helps to know the anatomy of the robot a bit better.
That conductivity requirement was most strict for the 5900-Scooba; however, iRobot reduced that requirement when it issued the 5800-Scooba just half a year later. The 5800s, and all subsequent (newer) Sccoba models, will function with (asserted) any water distributed by public water-supply utilities.... you may be wondering (as I did) why you need to use 2 oz. of white vinegar. The reason is actually for Scooba's sensors. The way that it detects if there's liquid left in the tank is by electrical conductivity. The Clorox solution is conductive enough, but plain water may not be (it depends on your water source).
Seems like you have done a good job of following iRobot's recommendations, Angie Mc. There are two suspects that come to mind. One is loss of a magnet (which is one half of the sensor type that reports the presence of Filter, Brush, and Tank, as well as wheels UP/DOWN), or the Tank's dirty-chamber may contain residue that is reporting "full", when you know you have dumped it!Angie Mc wrote:...It worked...for a day or two...now I'm back looking for more solutions because the "Check Tank" light is back on - ... Can someone help me? ...it won't work and it all seems so random as to why.
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