Ctek 250 help please!

[widu13]

Hi all, my 250 has been fitted for just over a year and stopped working briefly charging at 12.8v and I took it into @travelvolts where I purchased it from who could not find any fault. It's worked okay since.

Away on hols now and exactly the same thing has happened. I have both the battery charger fault lights on the ctek all fuses are good and I have continuity been the ign live and the ctek. I've seen 2 posts on here with a similar issue and their cteks were duff.

Any ideas? Have limited tools with me, just purchased a multimeter and a trace wire to find out the above.

 

[jimc91]

Are you sure you have a problem, your picture is how mine is when working

 

[widu13]

Deconstruct only charging at 12.8 though... Checked the incoming voltage.

 

[widu13]

Definitely

 

[Deaky]

Hi all, my 250 has been fitted for just over a year and stopped working briefly charging at 12.8v and I took it into @travelvolts where I purchased it from who could not find any fault. It's worked okay since.

Away on hols now and exactly the same thing has happened. I have both the battery charger fault lights on the ctek all fuses are good and I have continuity been the ign live and the ctek. I've seen 2 posts on here with a similar issue and their cteks were duff.

Any ideas? Have limited tools with me, just purchased a multimeter and a trace wire to find out the above.

View attachment 128014

They’re not fault lights. That means the battery is being charged by the alternator. If you had a fault then the red ! Top left would be illuminated

 

[Dellmassive]

If you are metering out 12.8v on the LB side that would indicate it's charging the LB.

If the LB is low . . . The CTEK can only deliver 20A max... Which will end up showing that kind of voltage when Charing.

the volts wont go up to >13v(13.6v) untill the LB SOC is near full

as above - no fault light showing

as above the unit appears to be working as designed.

what makes you think its faulty?

have you had a flat LB? - possible faulty LB not taking a good charge?(how old is LB)


To test.

Switch off engine - wait 15mins
Meter out start battery = ?v
Meter out LB = ?V
meter out IGN feed to Ctek = ?v
Start ENGINE on tick over . .
Meter out start battery = ?v
Meter out LB = ?V
meter out IGN feed to Ctek = ?v
post results

 

[Dellmassive]

also what are the battery type setting and SMART enabled or not?

AGM battery = Black cable to 0v

SMART Alt = Red cable to IGN +12v





.

https://cdn.tayna.com/datasheets/D250SE-SMARTPASS120S.pdf

.

 

[widu13]

Smart alt. Red wired to ign live. Battery has taken a dive these last two days and I didn't catch it until the low batt warning. I think it may be down to a less than "positive" connection at the Fuse holder, i.e working loose and not smart charging. It is loose and can be wiggled when correctly seated in the T6s Fuse box. The lights came on after I had been doing some diagnostics and reseated the holder. I have obviously reversed the lights from the instruction manual. (You would think they'd be in colour). Batt has been to 40% but a 2 hour drive did not put anything into it. Charged to 60% with a solar panel, might have to go on hook up and see what happens when batt is correctly charged.

 

[Dellmassive]

What fuse is loose . . . ?

iGN pickup?

Got a pic?

What about starter and LB main power feeds.

Are grounds tested good and secure?

 

[Dellmassive]

Have a look at the battery monitoring thread as well....


Battery Monitoring -- How I Done It --

Battery Monitoring -- How I Done It --

Battery Monitoring -- How I Done It -- Part #1 Battery monitoring is a very important part of your 12v system . . . . whether its just the vans starter battery or your leisure setup keeping an eye on the power in your battery bank will keep you from breaking down and make sure your weekends...

www.t6forum.com

.

 

[widu13]

Ign pick up. Wobbly in the Fuse box. Looks a bit of a job to dismantle and pinch together the contacts for the Fuse blade to fit into. Already using battery monitor but my phone is having dramas allowing notifications. Photo later on the Fuse, currently held in place with a bit of sponge!

What fuse is loose . . . ?

iGN pickup?

Got a pic?

What about starter and LB main power feeds.

Are grounds tested good and secure?

 

[widu13]

Cant post a video, and a photo of the offending Fuse won't help but screenshot showed the rapid decline of the battery and the lack of full charge. I last checked the charging 1-è months ago and it was charging to 15.2v at the max. Now it's struggling to break 13v. Since shutting the engine down the voltage has bombed, in now down to 80% capacity after 15mins. The only load is a compressor fridge on a low setting that until recently the batt would happily run for 3 days without charging at all. Has this charging issue and single deep discharge somehow shagged the batt?

 

[Dellmassive]

Possibly.

SLA batteries are easy damaged by running flat.. reduced capacity at best.

Got a pic of the battery and connections.

Your plot above shows 11.5v rest before the charge starts.... That is a very flat battery....... So I'd assume that battery is knackered and has lost its ability to hold a charge.

Try swapping the battery out as a temp....or just go for a replacement...

Look for AGM style SLA, they have the best results.

 

[widu13]

Cheers it was a brand new AGM just 15 months ago, I'm still away so I'll see if the chemistry recovers over the next few days.