Jump to content
Sign in to follow this  
Paul Hancock

Problem filling on board water tank

Recommended Posts

I have a 2018 Lunar Delta TI which is fitted  with an Aldi Compact 3020 HE heating system.  A problem has developed when I attempt to fill the onboard water tank from the aquaroll in that it appears that the on board pump is working in reverse.  Instead of the pump drawing water into the on board tank the pump forces the water out, emitting it under pressure from the aquaroll hose connection point on the caravan.   

i would appreciate any advice or help.

Share this post


Link to post
Share on other sites

Welcome

Silly question but could the battery terminals the wrong way round?

12V DC motors can be reversed by reversing the terminals.

Share this post


Link to post
Share on other sites

Hi, thank you for responding to my cry for help.  The terminals are correctly polarised.  However, the pump does appear to be operating in reverse.

Share this post


Link to post
Share on other sites
9 minutes ago, Paul Hancock said:

Hi, thank you for responding to my cry for help.  The terminals are correctly polarised.  However, the pump does appear to be operating in reverse.

Is there some form of valve to switch the pump between drawing water from the aquaroll to the tank. Then some how the same pump supplies pressure from the internal tank to the taps?

So look for a valve system maybe.

Share this post


Link to post
Share on other sites

Hi Ched,

good point which has made me think valves.  The van is fitted with an outlet for an attachable external shower.  Although the shower has never been attached it must require a valve system to reverse the pump action.  I will investigate under the seating tomorrow in an attempt to locate such a switch over valve.

Thank you.

Share this post


Link to post
Share on other sites

Good luck and let us know how you get on as it may help others in future.

Share this post


Link to post
Share on other sites

There have been quite a few posts about problems with the Delta on board water tank.  Ours included.

If the operating system is still based around Sargent control units then give them a call.  They sent us an easily understandable set of instructions. That more or less solved our problems.

  • Like 1

Share this post


Link to post
Share on other sites

Hi Bubble,

I called Sargent this am as you suggested.  They tried to help me but concluded that the fault did not lay with the control panal as it is sending 12v to the external pump in the aquaroll.

Through investigation I discovered the following;

a. The Sargent Control panal is ok.

b. The external, aquaroll pump is receiving the signal from the control panal to pump water to the internal tank.

c. Only around 15% of the water pumped from the aquaroll reaches the internal tank, the remaining 85% of the water is being restricted at the caravan inlet and is discharged, under pressure, from the water filter compartment, externally.

d. When water is demanded from the internal tank, by a tap being turned, everything works as it should and the water is distributed by the on board pump.

I came to the conclusion that the water filter must be blocked as I was advised that it had a diaphragm within it to allow a limited amount of water to pass through, in the event of a blockage, thereby reducing the pressure on the pump.  However, I have fitted a new filter today but the problem still exists.

I can only guess that there has to be a blockage between the filter and the internal tank.

Sorry to be so long winded, but, HELP PLEASE, if anyone can.

 

Paul

 

 

 

 

Share this post


Link to post
Share on other sites

Hi Paul

I'll dig out my Sargent stuff tomorrow.

One question - you say that a fault has developed, so did everything work OK to begin with. If so that will rule out incorrect pipe connections by the manufacturer.

Also, just try it without the water filter in place.

Edited by bubble2015
Typo

Share this post


Link to post
Share on other sites

Hi,

yes, everything worked fine prior to my winterising it in November.   The problem developed when I tried to flush the system through with Elsan Tank Cleaner before winterising it.  At that time I inspected the water filter, suspecting a blockage, and deduced that the O ring on the water filter looked damaged.  As a consequence I replaced the O ring but this did not solve the problem.  I then did as you say and tried it without the filter in place, but, to no avail.  I gave up and put the van into storage and planned to revisit the problem.

 

Share this post


Link to post
Share on other sites

We get this sort of problem with our Airstream and it is normally due to the main input solenoid valve getting gunged up - for us an easy job to remove and clean it.  Did it two weeks back and now fills as supposed to.

 

Share this post


Link to post
Share on other sites

Thank you Ted.  Any idea where I might find this?

Thank you Ted.  Any idea where I might find this?

Share this post


Link to post
Share on other sites

Is it a Whale / Sureflo pump ?  ours has a board under a bed with the filter and solenoid valves on it and the one that gives the trouble is a fairly large brass affair that acts as the diverter for the tanks !  Hope this helps

 

Share this post


Link to post
Share on other sites

Just need to say a big thank you to all the advise provided to me, especially by bubble 2015.  It turned out that the issue with the water being ejected from the aquaroll connection point was not as complex an issue as I’d thought.
it had nothing to do with: reverse polarity of the on board pump, a solenoid, pipe blockage, faulty Trauma Ultraflow external pump or the control panel.

After checking all of the above it turned out to be a distorted O ring on the water filter cover cap 😏.

 

 

 

  • Like 3
  • Haha 1
  • I agree completely 1

Share this post


Link to post
Share on other sites

Well done for posting the fix. It might help others in future. Have fun.

  • I agree completely 1

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Restore formatting

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Sign in to follow this  

×
×
  • Create New...