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Old 05-28-2012, 06:09 PM   #1
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MicroPulse System not Working

The black water sensor in my 2011 27'FB has never worked from day one. I've read all the pertinent info on the forum I could find, finally arriving at the .pdf instructions to recalibrate the offending sensor.

The recalibration sequence proceeds as per the instructions until the step to toggle the status switch when the black tank is full. After I do this the LED illuminates red, indicating the sensor failed calibration. The MicroPulse manual then instructs the user to turn off the monitor and repeat the calibration. I have done this several times with the same result. OK, I can live with a faulty black tank sensor, but my problem is the MicroPulse monitor will not exit from the calibration mode. Nothing I have tried will put it back to the way it was before - every time I turn it on it is in calibration mode. Can anyone help?

Don
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Old 06-09-2012, 07:32 AM   #2
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micropulse calibration

I had a similar problem with our black water tank sensor, and was attempting the re-calibration drill. I found the instructions a bit confusing, so I called the manufacturer and asked for help. One of the employees got on the line and actually led the through the process right on the phone while I performed the calibration. They were super helpful, and I bet they would do the same for you. Hope that is helpful.
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Old 06-09-2012, 08:33 AM   #3
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Interesting dilemma and one I would find somewhat encouraging. Our monitoring system hasn't worked at all during our ownership despite having tried everything short of complete removal. I've come to believe they are just decoration units for the wall.
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Old 06-09-2012, 08:49 AM   #4
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Hmmm...after I did the calibration ours has been working fine.
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Old 06-09-2012, 08:50 AM   #5
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We had issues when we first purchased our Bambi. Everything worked for a couple of weeks then it began to go wonky. After recalibrating several times with no good results I called the manufacturer and had a talk about what I could really expect. They assured me that the units do indeed work well but that sometimes there are several easy to correct problems that need to be addressed.
Ours had a bad sensor on the fresh water tank. I was told to look carefully at the connections at the sensors as this is a common source of problems too. Once I had the sensor replaced and the wire ends cleaned and re-snapped in, I carefully went through the calibration procedure (I actually measured water in 3 gallon buckets and knew exactly where I was in the filling of the tanks).
After this everything works perfectly! They are accurate and thus far problem free...
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Old 06-09-2012, 10:23 AM   #6
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We had a similar problem and symptoms and wasted a lot of water and time trying to recalibrate after replacing the fresh water sensor. We had our unit over at the Mothership for other repair issues and asked them to do what they could.
They found that there was corrosion on the terminals at both ends of the cable for the fresh water. I had examined the terminals earlier but the corrosion was not visible. The techs replaced the terminals and then the system would calibrate and has been working fine for the past five months. They told me when I asked them to work on the system that they'd do what they could but would give no guarantee of success or that it would continue to work.
Steve Barth at CatCon told me that corrosion was a frequent problem. If the system goes wacky on us again, I think I'll start by replacing terminal ends. Of course getting to the terminal ends for the sensors is a real challenge. :-(
Good luck!
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Old 06-11-2012, 05:54 AM   #7
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Thanks for the tips. AS are sending me a new black tank sensor along with instructions for installation and calibration. Looking under the trailer it appears the tank and sensor are covered by a galvanized belly pan. Not sure how to access the sensor but hopefully this will be explained when the package arrives. I'll let you know how it turns out.

Don
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Old 06-11-2012, 06:04 AM   #8
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Quote:
Originally Posted by DMT View Post
Thanks for the tips. AS are sending me a new black tank sensor along with instructions for installation and calibration. Looking under the trailer it appears the tank and sensor are covered by a galvanized belly pan. Not sure how to access the sensor but hopefully this will be explained when the package arrives. I'll let you know how it turns out.

Don
I found it interesting to speak to the manufacturer of the system. They had some useful information and I'd suggest that after you get the new parts and have decided exactly what you need to do to install them, you call MicroPulse for a quick heads up.....
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Old 06-13-2012, 08:19 PM   #9
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I was able to contact Catcon and the instruction to get the MicroPulse Monitor out of calibration mode are as follows:

Turn the power on. All LEDs will light green signaling "Ready for Calibration"
Toggle the status switch one time . The unit will light green for all installed functions, and the bottom LED will light green. This signals the unit is in diagnostic mode.
Toggle the status switch one time. As soon as the 1/8 LED is illuminated toggle the status switch four times in a row.
The display will go blank, and then start-up in normal mode.

I did this and sure enough the monitor is back in normal mode. Still have the problem with the black tank always reading empty but the new sensor en route from AS will hopefully fix that.

Don
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Old 03-15-2013, 06:55 PM   #10
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Could not get Micro-Pulse out of calibration mode

I followed the instructions in the previous post, glad to have found a way out of calibration mode. But for me starting in calibration mode, all green. One push gets to the dead sensor display which correctly indicates that I have two dead sensors ( top two leds are yellow, fresh water & grey water ). According to the previous post, one more push should get should show the 1/8 LED. Instead, mine jumps straight to 1/4 LED. Then four pushes does not seem to work to exit calibration mode. Fiddling around, without filling the black water tank (the one that works), I end up with the black water led red indicating that calibration failed and remain stuck in calibration mode!

I also followed the "selecting a single tank for calibration" which mentions a two-second delay between "select tank" and "ready for empty", but I see no such delay and no opportunity to select just one tank for calibration or give 4 pushes and exit calibration.

My real problem is the water pump does not work and has no 12 VDC at its in-line fuse. And that 12 VDC would seem to come from the pump switch on the MicroPulse panel. Does Calibration mode disable 12VDC to the pump?

I gather from the manual that there is a RJ11 connector at the sensor end. It is hard to imagine an RJ11 connector operating successfully for any reasonable period in the hostile environment of the underpan with not much between it road water and road salt. RJ11's are intended for use in household conditions. From the previous comments, Airstream techs don't have much confidence that the system can be reliable. Why don't they tell the factory! Mine lasted just 12 months from new!
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Old 03-16-2013, 06:26 AM   #11
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Call Catcon. When they finally answered the phone I found them very helpful. Maybe they can get you out of this.


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Old 03-16-2013, 07:47 AM   #12
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The system as a whole is unreliable and requires ongoing fiddling to keep working. I've had wiring problems, failed sensors, and calibration problems. Most of the problems have involved the wastewater holding tanks.
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Old 03-18-2013, 08:53 AM   #13
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I will call Catcon (when I made the post it was 5pm Friday).

Re Shurflo pump not working. I pulled the Catcon panel and saw that the pump switch is located with the level indicators, but circuit-wise is nothing to do with it except the level indicator gets its +12VDC from the wiper of the switch. When the switch was was in the on position, I did indeed get 12V at the pump fuse.

Eventually I removed the pump, disassembled it ( removed the pressure switch and the cover on the diaphragms ) then applied power and exercised the diaphragm switch but still the pump refused to go. I decided the pump electronics must be broken and started putting it back together. Due to finger trouble, at some point, I dropped the pump on the floor, the diaphragm partially released from the housing and the pump sprung to life, jumping around the floor of the trailer! I pushed the pressure switch to stop it, pulled the fuse, then reassembled the whole thing. It is now working.

I don't know if it is normal but the pump starts very slowly seeming as though it might not make it, but it seems to. I did a few test runs by turning the pump on and off and opening the cold tap and it seems to work.

Was this some kind of air lock whereby removing the diaphragm fixed it?

We shall see.
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Old 03-18-2013, 10:05 AM   #14
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Sounds like that might be the pump issue ...
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