Schaudt 199 not charging from mains

[bubble63]

Hi
Almost new Schaudt 199 is not charging from mains, checked all the fuses and found the 20A charger fuse blown , replaced and still no charge
The system is also fitted with a Schaudt booster WA 121525
I suspect while the mains charger was on there was a short battery to earth issue due to a terminal under the seat , this has been rectified
The booster works fine as I can get 13v in and out when then engine is running, everything else seems fine, just no mains charging, it has a battery master and solar
question, as I don’t often need mains charging is there a way to get the booster working without getting the 199 mains charger fixed
ta

 

[autorouter]

First question, are you sure it's an EBL199, I can't find any reference to an EBL with that number? If it's like all the other EBLs, there will be a big fuse, maybe 30A to 50A, very near to the leisure battery, that is the main power feed for the EBL. That is a favourite to blow if there's a short. Also there is very likely a second fuse, 2A, on a thin wire right next to that big fuse, that could also blow. The 2A fuse is on the voltage sensing wire, and if that's not working the EBL won't switch on.

Also there's a big fuse, 30A to 50A, very near the starter battery, that probably supplies the power for the Booster. And next to it will be a small fuse, 2A to 5A, for the D+ (Engine Running) signal from the alternator. The Booster probably needs this signal to turn on when the engine is running.

The EBL should work fine with the mains charger output fuse removed, apart from the mains charging obviously.

 

[bubble63]

Sorry my mistake, it’s a 119
thanks for the reply
I’ve found all the fuses you refer to , they all check out OK
The booster has power in and shows an output green led and 13v on a test meter
I rarely use EHU and the solar has been keeping the batteries topped up, masking the problem
on a long run I noticed the batteries went down to 80%, I think the fridge was drawing 5a but no charge from the engine
Im tempted to not fix the mains charger as I will need lithium charging soon and the 119 doesn’t support lithium
How could I reroute the booster to charge leisure batteries

I know the photo shows the battery off , buts it’s on now !

 

[autorouter]

The mains charger should not affect the charging while the engine is running. If you want to isolate it, remove the fuse labelled 'Internes Lademodul' ( = internal charger module), bottom left. To be 100% sure, you can pull out the mains 'kettle plug', top left. If it still causes a problem there might be an internal fault with the EBL.

I notice your fridge is not wired in the usual way, from the 4-way connector (Block 1) on the front panel, top left. That violet wire is the 'D+' (Engine Running) signal going out to the fridge to turn it on when the engine is running. It should be about +12V for engine running, and about 0V for engine stopped. If it isn't, check the other violet wire next to it on the 5-way. that is coming from the alternator, via that small fuse near the starter battery I mentioned before. That signal also switches on the 'Booster' which charges the leisure battery from the alternator/starter battery. So worth checking that's OK.

 

[bubble63]

Hi
thanks again for your input, it’s appreciated
violet on block 1 is 12v engine running and 0v engine off
engine running also signals the booster on , green light on, and 13v at the output of the booster
I assume the booster goes through the EBL to the batteries , that’s where I guess I have the problem
I’m thinking is it feasible to wire the booster to the batteries bypassing the EBL ?

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[autorouter]

I’m thinking is it feasible to wire the booster to the batteries bypassing the EBL ?

Yes it's the way to do it if you have a B2B that is too powerful for the EBL to take. A 60A or 70A B2B for example. Take the B2B output directly to the batteries, and make sure that nothing is connected to the starter battery terminal at the back of the EBL. However you will lose the state of charge (SOC) measurement, measured by the shunt inside the EBL. You can either just live with that or fit a battery monitor shunt to the battery. The voltage display should still be accurate.

The other starter battery functions like charging while on EHU and measuring the battery voltage are done via a second wire, from the front of the EBL, so no need to worry that you could disable them. The red wire on the 5-way connector, if you want to know. There is a 20A fuse for it very near the starter battery.

If there's still a problem, Apuljack Electronics can repair or exchange the EBL

Schaudt Elektroblock EBL 119 Fuseboard with Integrated Charger | Apuljack

Schaudt Elektroblock EBL 119 - exchange, repair, new, lithium upgrade

www.apuljackelectronics.co.uk

 

[bubble63]

and make sure that nothing is connected to the starter battery terminal at the back of the EBL.

Pulling the fuse in battery compartment or disconnecting and insulating the wire to the back of the EBL

 

[autorouter]

One way to connect the Schaudt Booster is to disconnect the original starter battery feed to the EBL at the EBL end, and feed it into the starter battery input of the booster. Then run a new wire from the booster output to the EBL starter battery input terminal.

If that's how they did it, then you won't want to pull the fuse on the starter battery wire, because that would cut the feed to the Booster. You could remove the wire from the Booster output to the EBL, and run a new wire from the Booster to the leisure battery.

The EBL doesn't need any input to the big starter battery terminal at the back. That is only for the split charge relay, which you definitely don't want to work if you have a Booster.

 

[bubble63]

Thanks
The booster is fed from the traction battery and then goes to the back of the EBL so I will remove the booster to the EBL at the EBL end and connect it directly to the leisure batter
I’m then thinking it’s probably easier to by a new Victron charger, remove and use the EBL mains input plug/wire to power it and again go straight to the leisure battery
I have a battery master fitted so that should take car of the trickle charging

 

[bubble63]

Sorry to say I didn’t solve the issue by wiring the Schaudt booster directly to the leisure battery
It looks like the booster (B2B) is faulty
Good volts in , engine signals the led on, open circuit there is voltage on the output but when connected to the battery, no charge shows on the shunt
The shunt shows everything else functioning
I’ve checked the selectors , turned the temperature sensor on and off , checked all The connections , nothing

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[bubble63]

So an update
I had to resort to buying a clamp meter and found that I had a discharge via the Schaudt booster (B2B) and not a charge!
I have now replaced the booster with a new one and the problem is solved
It took awhile, but I got great advice on here, which really helped
Phew