[8weekly]

I did a miss wire and it blew the fuse surely that's what the fuse is for?

Me too.

[water fed bill]

I think we will have to agree to disagree, we will have the unit back and have it looked at by an idependant electronics expert and see if he can shed any light on it.
Thanks

[Peter Fogwill]

I did a miss wire and it blew the fuse surely that's what the fuse is for?

No as explained, because the current went the opposite way it never got to the fuse until it was on the way back out, and after it had done the damage to the diode.

[Liam1990]

Out of interest how much would the repair cost ?

[Peter Fogwill]

I did a miss wire and it blew the fuse surely that's what the fuse is for?

No as explained, because the current went the opposite way it never got to the fuse until it was on the way back out, and after it had done the damage to the diode.

Does seem a shame that something so easily done can cost so much.  Most things nowadays have reverse polarity protection, because people will always make the mistake of putting the wrong cable on the wrong terminal. Bill I have the cheap PWM controllers that I mentioned earlier, you are welcome to one FOC if your interested?  You can just pay the postage.

[Dave Mills]

I did a miss wire and it blew the fuse surely that's what the fuse is for?

From what's been said it would appear that the mis-wiring blew the diode, which it did to protect the components on the main board.  The fuse kept blowing because of that initial mistake.

In what way is that anyones fault but the person installing it incorrectly?

[Dave Mills]

I did a miss wire and it blew the fuse surely that's what the fuse is for?

No as explained, because the current went the opposite way it never got to the fuse until it was on the way back out, and after it had done the damage to the diode.

Does seem a shame that something so easily done can cost so much.  Most things nowadays have reverse polarity protection, because people will always make the mistake of putting the wrong cable on the wrong terminal.

Perhaps they should RTFM!

[Ian Sheppard]

The cost of repair is £30.00 + vat and postage.

If you would prefer the control returned in its current condition we can also do this.

As previously said it is very important to have correct polarity with a DC device. Also it is essential to fit the appropriate fuse.

Thank you for you input peter re the fuse.

[Peter Fogwill]

I did a miss wire and it blew the fuse surely that's what the fuse is for?

No as explained, because the current went the opposite way it never got to the fuse until it was on the way back out, and after it had done the damage to the diode.

Does seem a shame that something so easily done can cost so much.  Most things nowadays have reverse polarity protection, because people will always make the mistake of putting the wrong cable on the wrong terminal.

Perhaps they should RTFM!

Dave its an easy thing to do.  We all know that its not supposed to be connected that way, but most of us will have done it at some time.  In fact all it needs to do is touch for a split second.

[Dave Mills]

Dave its an easy thing to do.  We all know that its not supposed to be connected that way, but most of us will have done it at some time.  In fact all it needs to do is touch for a split second.

Have to disagree.  Polarity is so important that it must be checked carefully before connecting anything.  Anyone who connects - however briefly - without KNOWING its right is a fool.

[Peter Fogwill]

Why do you think that most things are protected against it? I have £12 battery chargers in the workshop which has reverse polarity protection.  It will happen and that's why most items are protected against it.

[Ian Sheppard]

Thanks for looking into it for us. But we are back to were we started the first repair we was told there was a fault fixed under warranty no mention of miss wiring or goodwill gesture.
As for the miss wiring how can it be wired correctly run the pump and then blow a fuse ? Then blow another and another. To me a fuse blowing tells me there is a short some and it wasnt the external wiring.
Can you say 100% that its impossible for the unit to short from the inside?

Hi Dave/Liam following a miss wire and and blowing the reverse polarity diode, Once the cables are re connected with correct polarity yes the fuse will blow.
This is because following the miss wire it is likely to have caused a short across the board on reconnection of the cables with correct polarity the short will cause the fuse to blow.

The original fault was caused by miss wiring the controller. This tends to happen following a battery change. The battery is disconnected for a re charge on reconnection the positive cable connector only needs to be in contact momentarily with the negative terminal of the battery for a very short period.
 
The way the PCB is designed built and tested plus how we position the diode. Yes I can be 100% sure that only an external miss wire would cause this diode to blow.

I should also add that for a short to occur a power source is required. the controller has no internal power source.
Like the pump it derives its power from an external source in this case the 12V battery.

[Dave Mills]

Why do you think that most things are protected against it? I have £12 battery chargers in the workshop which has reverse polarity protection.  It will happen and that's why most items are protected against it.

The error was in the actions of the person who didnt connect their controller correctly.  Its not as though you connect a controller every day like you might a battery charger.  This is a one-off.  Why should an item be more expensive for all of us (thats what it means, remember, reverse polarity protection is not free) just because some berk cant read instructions the ONE time they have to connect it?

[Peter Fogwill]

Dave you don't know how many times he has disconnected his battery terminals, or connected them back up. It's not just a case of a one off when you connect your controller initially, it has the potential of this happening every time you connect the battery, which will be as many times as you use a charger. Yes it will cost money, the price of a fuse. It wouldn't need to cost anymore to add a fuse, and it would make the controller more desirable.

[water fed bill]

Every one keeps banging on about reverse polority but it WAS NOT wired incorrectly this is my problem it was wired correctly I turned the conrtol unit on the pump run and then the fuse blew and then again and again but every insist were stupid or liars.
Ian please send the controller back to us as it is.

Peter thanks for your kind offer I would appreciate the controller I will happily pay the postage.

[Peter Fogwill]

No problem, can you send me your address to
peter@window-tools.com
Remember there is no garantee with it 

[Dave Mills]

Dave you don't know how many times he has disconnected his battery terminals, or connected them back up. It's not just a case of a one off when you connect your controller initially, it has the potential of this happening every time you connect the battery, which will be as many times as you use a charger. Yes it will cost money, the price of a fuse. It wouldn't need to cost anymore to add a fuse, and it would make the controller more desirable.

Thats incorrect. A fuse will not prevent reverse polarity errors. A fuse only blows if too much current is drawn.  A reverse current will fry components long before a fuse blows.

Anyway, I like the controller being a bit cheaper than it would be with the expense of the protection you desire because I take care when I connect things to batteries, so I get the goods cheaper and still somehow manage not to blow them.

[Ian Sheppard]

Neil I can arrange for the control to be returned to you directly is your address as that advised to PF on 8th April.



 

[water fed bill]

yes the address is the same. thanks
you have an email peter.

[Peter Fogwill]

No sign yet and I am leaving the workshop.  It's all wrapped up and I will post it tomorrow when I get the address.