Electrical Mystery

Go down

Electrical Mystery Empty Electrical Mystery

Post by Rubi's Dad on Mon Jul 04, 2016 7:02 pm

I have a bit of a nightmare, hope someone can help?

When my 2009 Nuevo is not in use I have it on mains hook up at home. I hadn't used it for a couple of weeks and noticed the main control panel was completely dead. The only way I can get it to operate is to start the vehicle then it operates fine and we had no problems over a long weekend away when it would have been charging from the vehicle battery. Van has not been used for 2 weeks again, has been on hook up and same issue all over again.The leisure battery was replaced very recently and the habitation battery is showing 13.8v when the panel does work. To add to the mystery the red charging switch on top of the PDU 4m is not lighting up. My assumption is that this is some sort of charging problem but not sure where to start?

Possibly worth mentioning a couple of months ago the fridge kept blowing fuses so I had an engineer look at it, he wasn't sure if the terminal block in PDU was the issue as fuse was loose and getting hot, so relocated that fuse to a separate holder on side of PDU and replaced the fridge element no blown fuses since then but now I have the 12v charging issue, not sure if there is a connection? Pun intended!

Any help much appreciated.
Rubi's Dad
Rubi's Dad
Member
Member

Male

Posts : 47
Joined : 2016-07-04
Member Age : 55
Location : Lancaster
Auto-Sleeper : Broadway EK
Vehicle Year : 2014

View user profile

Back to top Go down

Electrical Mystery Empty Re: Electrical Mystery

Post by burlingtonboaby on Mon Jul 04, 2016 7:53 pm

Type in battery in the search box, you might find some info that may help, until someone can advise you later.
Boaby
burlingtonboaby
burlingtonboaby
Donator
Donator

Male

Posts : 7989
Joined : 2011-11-15
Member Age : 70
Location : Bridlington
Auto-Sleeper : Warwick duo
Vehicle Year : 2016

View user profile

Back to top Go down

Electrical Mystery Empty Re: Electrical Mystery

Post by willy eckerslike on Mon Jul 04, 2016 9:08 pm

As a first step I would measure the voltage with a meter at the leisure battery terminals while on hookup and see whether there is an output from the charger.

You should see around 13 volts


Last edited by willy eckerslike on Mon Jul 04, 2016 9:10 pm; edited 1 time in total (Reason for editing : additional text)

_________________
Cheers, Willy
willy eckerslike
willy eckerslike
Donator
Donator

Male

Posts : 350
Joined : 2015-09-09
Member Age : 76
Location : Ayrshire
Auto-Sleeper : Devon
Vehicle Year : 2008

View user profile

Back to top Go down

Electrical Mystery Empty Re: Electrical Mystery

Post by PennyandDerek on Wed Jul 06, 2016 6:05 pm

Hi Rubi's Dad,

Interesting that you have no power to the board when at rest after a break.
Then, when you start the engine, you get the D+ signal - over goes the relay(s) and everything then works properly. Engine off - and all OK again (for a while.............).
It sounds like the relay normally closed contacts are giving up. These are the relays that are hanging in the loom down the side of the battery.

You should note that these MES panels are prone to spurious readings - especially if they have suffered from a low voltage situation.
The trick is to remove the hab battery neg. or 30a fuse in pos.- slowly count to ten - reconnect.
This forces a hard reset on the board.

Derek
PennyandDerek
PennyandDerek
Donator
Donator

Male

Posts : 326
Joined : 2012-03-08
Member Age : 70
Location : Dolton, Deepest Devon
Auto-Sleeper : Nuevo ES Lowline
Vehicle Year : 2008

View user profile

Back to top Go down

Electrical Mystery Empty Getting nowhere fast

Post by Rubi's Dad on Thu Jul 07, 2016 6:46 pm

Thanks all so far.

From my basic investigations what do I know for definite?

I know the almost new hab battery is dead and the only way to get life into it is fire up the vehicle.
I know all fuses are ok including main 50amp fuse to the hab battery
I know the electric hook up is all ok
I know the charger light on PDU will not come on
I know if I turn the engine off the hab battery begins to lose charge

So it is clearly a charging issues. Possibilities?

It is a relay problem, can they be tested?
The charger has had it, does that mean new PDU?
Did the guy who fixed my fridge muck something up ?
Wrong kind of Northern electricity?
Leaves on the van?

Answers on a postcard please hugegrins
Rubi's Dad
Rubi's Dad
Member
Member

Male

Posts : 47
Joined : 2016-07-04
Member Age : 55
Location : Lancaster
Auto-Sleeper : Broadway EK
Vehicle Year : 2014

View user profile

Back to top Go down

Electrical Mystery Empty Re: Electrical Mystery

Post by meanchris on Thu Jul 07, 2016 7:49 pm

Do the 230V sockets work on EHU?
avatar
meanchris
Member
Member

Male

Posts : 2381
Joined : 2013-08-10
Member Age : 65
Location : North West
Auto-Sleeper : None
Vehicle Year : N/A

View user profile

Back to top Go down

Electrical Mystery Empty Re: Electrical Mystery

Post by Rubi's Dad on Thu Jul 07, 2016 8:16 pm

Yes they work ok
Rubi's Dad
Rubi's Dad
Member
Member

Male

Posts : 47
Joined : 2016-07-04
Member Age : 55
Location : Lancaster
Auto-Sleeper : Broadway EK
Vehicle Year : 2014

View user profile

Back to top Go down

Electrical Mystery Empty Re: Electrical Mystery

Post by willy eckerslike on Thu Jul 07, 2016 9:24 pm

Is there any output from the charger to the hab battery ?

_________________
Cheers, Willy
willy eckerslike
willy eckerslike
Donator
Donator

Male

Posts : 350
Joined : 2015-09-09
Member Age : 76
Location : Ayrshire
Auto-Sleeper : Devon
Vehicle Year : 2008

View user profile

Back to top Go down

Electrical Mystery Empty Re: Electrical Mystery

Post by PennyandDerek on Thu Jul 07, 2016 9:42 pm

We need the answer to Willy's question.
Just 'cos the charger light doesn't come on, doesn't necessarily mean the charger isn't working.

"...Did the guy who fixed my fridge muck something up ?..."

Could be.........hence the fast discharge rate when you turn the engine off.
With the fridge on 12v, does the indicator light come on only when the motion sensor sends the relay over and also retracts the step?
Moreover, does the indicator light go out when the engine is switched off?

Derek
PennyandDerek
PennyandDerek
Donator
Donator

Male

Posts : 326
Joined : 2012-03-08
Member Age : 70
Location : Dolton, Deepest Devon
Auto-Sleeper : Nuevo ES Lowline
Vehicle Year : 2008

View user profile

Back to top Go down

Electrical Mystery Empty Re: Electrical Mystery

Post by Rubi's Dad on Thu Jul 07, 2016 9:59 pm

Thanks Derek & Willy

The fridge has been turned off while on hook up so that should count that out as a reason for fast discharge. It operates as it should on 12 v while vehicle is in motion, indicator lights and step behave as they should.

As for output from the charger I am not sure how's to tell as I can only get a reading with engine running. As soon as I turn it of the reading plummets
Rubi's Dad
Rubi's Dad
Member
Member

Male

Posts : 47
Joined : 2016-07-04
Member Age : 55
Location : Lancaster
Auto-Sleeper : Broadway EK
Vehicle Year : 2014

View user profile

Back to top Go down

Electrical Mystery Empty Re: Electrical Mystery

Post by meanchris on Thu Jul 07, 2016 10:06 pm

But, do you get a charging voltage at the battery while on EHU?
avatar
meanchris
Member
Member

Male

Posts : 2381
Joined : 2013-08-10
Member Age : 65
Location : North West
Auto-Sleeper : None
Vehicle Year : N/A

View user profile

Back to top Go down

Electrical Mystery Empty Re: Electrical Mystery

Post by Rubi's Dad on Thu Jul 07, 2016 10:37 pm

Questioning if I am reading the meter correctly as I appear to be getting 2/3 v on EHU?
Rubi's Dad
Rubi's Dad
Member
Member

Male

Posts : 47
Joined : 2016-07-04
Member Age : 55
Location : Lancaster
Auto-Sleeper : Broadway EK
Vehicle Year : 2014

View user profile

Back to top Go down

Electrical Mystery Empty Re: Electrical Mystery

Post by meanchris on Thu Jul 07, 2016 10:44 pm

Rubi's Dad wrote:Questioning if I am reading the meter correctly as I appear to be getting 2/3 v on EHU?

On the battery terminals? (Just to check too, you're on the correct DC range?)
avatar
meanchris
Member
Member

Male

Posts : 2381
Joined : 2013-08-10
Member Age : 65
Location : North West
Auto-Sleeper : None
Vehicle Year : N/A

View user profile

Back to top Go down

Electrical Mystery Empty Re: Electrical Mystery

Post by Rubi's Dad on Thu Jul 07, 2016 10:55 pm

Yes on the terminals. Photo of meter [You must be registered and logged in to see this link.]attached
Rubi's Dad
Rubi's Dad
Member
Member

Male

Posts : 47
Joined : 2016-07-04
Member Age : 55
Location : Lancaster
Auto-Sleeper : Broadway EK
Vehicle Year : 2014

View user profile

Back to top Go down

Electrical Mystery Empty Re: Electrical Mystery

Post by meanchris on Thu Jul 07, 2016 10:58 pm

Your meter is set on the wrong range - it needs to be pointing at the 20V range at top right 2 'o' clock on the meter - right next to the yellow button
avatar
meanchris
Member
Member

Male

Posts : 2381
Joined : 2013-08-10
Member Age : 65
Location : North West
Auto-Sleeper : None
Vehicle Year : N/A

View user profile

Back to top Go down

Electrical Mystery Empty Re: Electrical Mystery

Post by Rubi's Dad on Thu Jul 07, 2016 11:36 pm

Ok thanks. Have switched to 20v range and I get a reading of 2.9v at the terminals on EHU .
Rubi's Dad
Rubi's Dad
Member
Member

Male

Posts : 47
Joined : 2016-07-04
Member Age : 55
Location : Lancaster
Auto-Sleeper : Broadway EK
Vehicle Year : 2014

View user profile

Back to top Go down

Electrical Mystery Empty Re: Electrical Mystery

Post by meanchris on Fri Jul 08, 2016 8:13 am

Then the mains charger isn't working.

Probably either because it has no 230V supply at its input terminals (bearing in mind that you say the 230V sockets are working, so there must be a supply into the van) - Or - because it has failed.
The fact that there's no red light on the charger appears to be significant, supporting this suggestion.

This probably means that your 'new' battery is now knackered if it has been discharged to that low a voltage several times, and it's why the control panel only works with the engine running, because there's not enough hab battery voltage to power it without.

You need to find out why the charger isn't working. (pity you don't live nearer, or I'd have a look for you)

Someone recently had a very similar problem, which turned out to be loose mains wires in the back of the charger unit, but I would NOT recommend that you investigate this yourself without a full understanding of exactly what you're doing.
avatar
meanchris
Member
Member

Male

Posts : 2381
Joined : 2013-08-10
Member Age : 65
Location : North West
Auto-Sleeper : None
Vehicle Year : N/A

View user profile

Back to top Go down

Electrical Mystery Empty Re: Electrical Mystery

Post by Rubi's Dad on Fri Jul 08, 2016 8:47 am

Really helpful and all makes sense . Hopefully the hab battery isn't knackered yet as it will charge from the vehicle and hold a charge over a long weekend away.

Will PM you too - Cheers
Rubi's Dad
Rubi's Dad
Member
Member

Male

Posts : 47
Joined : 2016-07-04
Member Age : 55
Location : Lancaster
Auto-Sleeper : Broadway EK
Vehicle Year : 2014

View user profile

Back to top Go down

Electrical Mystery Empty Re: Electrical Mystery

Post by meanchris on Fri Jul 08, 2016 8:55 am

It may, possibly, be acceptably OK, but it will have had its capacity and longevity reduced by being so thoroughly discharged, especially if it's more than once or twice.
You're talking to someone here who will try to extract the last ounce of usefulness from a 12V battery before giving up, so I'd probably give it at least a chance too.
avatar
meanchris
Member
Member

Male

Posts : 2381
Joined : 2013-08-10
Member Age : 65
Location : North West
Auto-Sleeper : None
Vehicle Year : N/A

View user profile

Back to top Go down

Electrical Mystery Empty Re: Electrical Mystery

Post by meanchris on Fri Jul 08, 2016 12:25 pm

PM me again, second and third PMs were repeats of the first. wave
avatar
meanchris
Member
Member

Male

Posts : 2381
Joined : 2013-08-10
Member Age : 65
Location : North West
Auto-Sleeper : None
Vehicle Year : N/A

View user profile

Back to top Go down

Electrical Mystery Empty Re: Electrical Mystery

Post by Peter Brown on Tue Jul 19, 2016 2:31 pm

I cant see any mention of what the electrical system is but if its a Sargent the red light on the PSU is also an on/off switch - did the engineer working on the fridge switch it off?

Peter

_________________
Peter #1
Peter Brown
Peter Brown
Member
Member

Male

Posts : 5296
Joined : 2012-11-10
Member Age : 67
Location : Staffs
Auto-Sleeper : Malvern
Vehicle Year : 2011

View user profile

Back to top Go down

Back to top


 
Permissions in this forum:
You cannot reply to topics in this forum