D5 NEXT Moisture issue

[Jay85]

Any had an issue where their D5 NEXT from Aquacomputer would randomly come on but there is no moisture or leakage?

I've taken mine apart to inspect thoroughly and can't see anything, cleaned with ISO and let dry, reassemble but still the same issue.


Quite annoying because you can't turn the alarm off either.

 

[Captain_Bosh]

Have you tried an air pressure test for a double check? If it passes could be faulty unit.

 

[Jay85]

Have you tried an air pressure test for a double check? If it passes could be faulty unit.

Tested before refilling the loop. Thinking the mainboard might have died.

Ordered a new one anyway, so annoying... Had this unit for about 5 years!

 

[pre]

Any had an issue where their D5 NEXT from Aquacomputer would randomly come on but there is no moisture or leakage?

I've taken mine apart to inspect thoroughly and can't see anything, cleaned with ISO and let dry, reassemble but still the same issue.


Quite annoying because you can't turn the alarm off either.

So my incident of this was actually due to a pwm cable extension where 1 pin were slightly outside of housing when stretched. If you look at the interior of housing the moisture mechanism is basically bits of metal detecting for a short circuit from conductive liquid. In my case it was conductive metal making contact with the detection point.

 

[Jay85]

So my incident of this was actually due to a pwm cable extension where 1 pin were slightly outside of housing when stretched. If you look at the interior of housing the moisture mechanism is basically bits of metal detecting for a short circuit from conductive liquid. In my case it was conductive metal making contact with the detection point.

Interesting! Didn’t even consider this. I read that damaged traces can cause a false positive too somewhere, i will test the pin touching the traces and see if there’s any contact.

 

[Jay85]

So my incident of this was actually due to a pwm cable extension where 1 pin were slightly outside of housing when stretched. If you look at the interior of housing the moisture mechanism is basically bits of metal detecting for a short circuit from conductive liquid. In my case it was conductive metal making contact with the detection point.

So had a good look tonight and still can't see anything. The pins on the 4pin pwm fan cable doesn't have anything protruding out of it either to cause a contact and to test this i have used the same one on the new unit which has worked perfectly fine.

Only thing i can think of, is a broken trace somewhere that i cannot see.

Been looking a replacement board but it's relatively unobtainium without going into the far reaches of Europe.

 

[Mcnumpty2323]

So had a good look tonight and still can't see anything. The pins on the 4pin pwm fan cable doesn't have anything protruding out of it either to cause a contact and to test this i have used the same one on the new unit which has worked perfectly fine.

Only thing i can think of, is a broken trace somewhere that i cannot see.

Been looking a replacement board but it's relatively unobtainium without going into the far reaches of Europe.

maybe someone like Vince could
take a look at it?
probably not his usual stuff but a short
or a broken trace or solder crack is probably something
he could detect and maybe fix

 

[pre]

So had a good look tonight and still can't see anything. The pins on the 4pin pwm fan cable doesn't have anything protruding out of it either to cause a contact and to test this i have used the same one on the new unit which has worked perfectly fine.

Only thing i can think of, is a broken trace somewhere that i cannot see.

Been looking a replacement board but it's relatively unobtainium without going into the far reaches of Europe.

Just to confirm have you taken the board+ ribbon+screen out of the housing to check for residue in non-exterior? There is an image somewhere which shows how to do it if not. If its alerting 24/7 with the alarm would guess it would be inside vs when something moves a bit like a cable in my case.

If the board/controller is what you need after exhausting investigation then a retailer in nl have them but it almost 70% of a new NEXT.

 

[Sin_Chase]

Just to confirm have you taken the board+ ribbon+screen out of the housing to check for residue in non-exterior? There is an image somewhere which shows how to do it if not. If its alerting 24/7 with the alarm would guess it would be inside vs when something moves a bit like a cable in my case.

If the board/controller is what you need after exhausting investigation then a retailer in nl have them but it almost 70% of a new NEXT.

I had to remove the main board from the plastic housing like this completely. Some corrosion on the copper traces for the moisture sensor from a previous leak and a small amount of coolant stuck between bottom of housing and PCB.

Likely to break a retention clip getting it out but that's no big deal.

I dried out and cleaned with contact cleaner and isopropyl, been fine for 2 years since.

 

[pre]

Here is the image instructions for disassembly in case you havent done this already:

 

[Jay85]

maybe someone like Vince could
take a look at it?
probably not his usual stuff but a short
or a broken trace or solder crack is probably something
he could detect and maybe fix

Thought about that too, my eyes aren't great at the moment and i need glasses! So hard for me to really look closely at the traces.

 

[Jay85]

Just to confirm have you taken the board+ ribbon+screen out of the housing to check for residue in non-exterior? There is an image somewhere which shows how to do it if not. If its alerting 24/7 with the alarm would guess it would be inside vs when something moves a bit like a cable in my case.

If the board/controller is what you need after exhausting investigation then a retailer in nl have them but it almost 70% of a new NEXT.

Yeah everything is apart and away from the plastic housing, the 2 pcb's are separated but from what i can see, there's no corrosion or leakage anywhere.

I'm tempted to send this to someone or possibly buy a replacement pcb...

 

[Jay85]

I had to remove the main board from the plastic housing like this completely. Some corrosion on the copper traces for the moisture sensor from a previous leak and a small amount of coolant stuck between bottom of housing and PCB.

Likely to break a retention clip getting it out but that's no big deal.

I dried out and cleaned with contact cleaner and isopropyl, been fine for 2 years since.

I was quite lucky and didn't break any retention clips! I levered one of the clips back and prodded the pcb from the opposite side to push it past the clip. Once 2 corners were done, the pcb fell out quite easily.

The corrosion on yours looks quite bad but probably isn't, at least it still works!