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Old 07-16-2014, 02:51 AM   #1
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Systems Monitor not reading water tank correctly

Hi,

The Systems "Micro Pulse" Monitor on my unit is reading low fresh water, but the tank is full. When the tanks drops below 7/8 or so, the monitor reads empty. Any ideas on on the problem?

Looking at the white plastic water tank, I see a connector at the bottom connected to a beige cable that looks like a phone jack (RJ11). That cable seems to run outside the unit, or through the walls. Not sure if its the status sensor? Thanks for any advice.

The monitor also reads the battery level and grey/black tank level. Those seem to be "mostly" accurate.

Pictures attached.. (tank is full but the monitor is reading low)
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Old 07-16-2014, 06:54 AM   #2
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Possibly a stupid question. How can you tell what tank it is reading?
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Old 07-16-2014, 07:49 AM   #3
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My black shows full all the time too. I just re-calibrated all of them a couple weeks ago. the rest are perfect, but the black started off normal and within a few hours it started marching up the LEDs, one at a time, until all are lit.

Since I can see the black level down the toilet, I'm not messing with it until I have to replace with a SeeLevel system.
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Old 07-16-2014, 07:51 AM   #4
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Possibly a stupid question. How can you tell what tank it is reading?
When you press the button, the led beside the tank name will flash, then show the series of leds to indicate the level by color and number of leds lit.
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Old 07-16-2014, 08:20 AM   #5
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You might try completely draining the tank. I open the valve while towing and let the motion of the tow drain the water. I usually leave the valve open overnight to insure a complete drain. Then refill and see if that helps. Maybe there is sediment or other gunk floating in the tank?
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Old 07-16-2014, 10:24 AM   #6
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My black shows full all the time too. I just re-calibrated all of them a couple weeks ago. the rest are perfect, but the black started off normal and within a few hours it started marching up the LEDs, one at a time, until all are lit.

Since I can see the black level down the toilet, I'm not messing with it until I have to replace with a SeeLevel system.
x2... except my black always shows empty. You should have a Micropulse manual that came with your Airstream. It explains how to recalibrate.
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Old 07-16-2014, 10:42 AM   #7
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Oh, believe me, I'm an expert at recalibration. Very well practiced!
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Old 07-16-2014, 10:45 AM   #8
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x2... except my black always shows empty. You should have a Micropulse manual that came with your Airstream. It explains how to recalibrate.
This may well be the problem(calibration). At least when we bought our trailer, it was the dealer's responsibility to calibrate the monitoring system before delivery. They are apparently not calibrated at the factory. In the case of the black water tank in particular, the sensors may be fooled by material adhering to the inside of the tank. A very through rinse may help that.

However, all this aside, the system does not seem all that reliable to me.

An always empty or always full indication could be faulty wiring.

Ken
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Old 07-16-2014, 03:16 PM   #9
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I flushed the fresh water tank and re-filled with no luck and tried to clean the connector up a bit. I'll have to try the re-calibration option. Although, based on other posts, I shouldn't expect a magic fix. The only thing that gives me some hope is the black and battery seem to be registering. Visual inspections and volt meter are probably the way to go.
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Old 07-16-2014, 04:24 PM   #10
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This may well be the problem(calibration). At least when we bought our trailer, it was the dealer's responsibility to calibrate the monitoring system before delivery. They are apparently not calibrated at the factory. In the case of the black water tank in particular, the sensors may be fooled by material adhering to the inside of the tank. A very through rinse may help that.

However, all this aside, the system does not seem all that reliable to me.

An always empty or always full indication could be faulty wiring.

Ken
I've recalibrated 6 - 8 times in the 4 years I've owned it. Funny thing this time is the proper reading in the black tank when done, and then a slow rise of the LEDs over 3 or 4 hours to end up showing full. The tank was thoroughly flushed a couple times before calibration. May be wiring, but I would think high resistance would show up right away, not over several hours. Fresh and gray are calibrated perfectly.

But, if I have to drop tank pans to inspect or change a sensor, I'll do it one time and install a SeeLevel system.
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Old 07-16-2014, 04:32 PM   #11
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Rportillo, the bad news is that there may not be a fix for your unit. If you search you will find several threads dedicated to this topic. My fresh tank experienced the exact same problem as yours with my grey and be similar and the black showing empty or nearly empty in most all cases. After recalibrating around five times, changing all 3 sensors at least once, checking all cable connections and changing the entire control head (all under warranty), it never would work. Airstream eventually changed out my system to the SeeLevel system under warranty and now it works properly. Bay Area Airstream can now change out yours for a low, low $2,500.00. Or you will just have to guess about your fresh water level.


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Old 07-16-2014, 06:36 PM   #12
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Rportillo, the bad news is that there may not be a fix for your unit. If you search you will find several threads dedicated to this topic. My fresh tank experienced the exact same problem as yours with my grey and be similar and the black showing empty or nearly empty in most all cases. After recalibrating around five times, changing all 3 sensors at least once, checking all cable connections and changing the entire control head (all under warranty), it never would work. Airstream eventually changed out my system to the SeeLevel system under warranty and now it works properly. Bay Area Airstream can now change out yours for a low, low $2,500.00. Or you will just have to guess about your fresh water level.


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My black tank level system works perfectly. I raise the lid on the toilet, then open the flush valve while shining a flashlight down the opening.

Ken
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Old 07-16-2014, 06:41 PM   #13
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My black tank level system works perfectly. I raise the lid on the toilet, then open the flush valve while shining a flashlight down the opening.

Ken
That's my brand new system that I just got for my AS a couple weeks ago.
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Old 07-16-2014, 07:04 PM   #14
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Fresh Water Level Alarm System

I have an effective alarm system for the fresh water.

When the water stops coming out the tap, I get alarmed.

I always top up the fresh water before leaving home or any any camp site with water, unless I am going to be home that day. If I arrive home with water in the tank, I regard it as free irrigation for the hedge and flowers next to the driveway.

I guess the reason, the factory systems works well in my trailer is because I don't care about it.

Ken
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