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rugbytowbars

issue with pms6 control unit

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Ive got a lunar premiere 5 birth 1995. First caravan ive owned.
Im having issues with the electrics. The leisure battery is dead as a dodo, ordered a new one, but i don't seem to be getting a charging supply to it when the ehu is plugged in. Doesnt matter what position the car/off/van switch is at. Or the red charging switch on the same part of the panel.

Ive had the whole unit out, and from reading some posts on here, it looks like the battery charging system is built into the pms6.

Im assuming that with the ehu plugged in, i should get 12v out. Tried with battery connected and disconnected, but no difference.

Can i repair the pms6, or would it be easier to replace with a suitable unit. Guessing that the pms6 being 25 years old, any second hand replacement i find may also have issues either now or later down the line.

I have no issues with working 12v electrics, but struggling with this control panel and how exactly caravan electrics are supposed to work.

Quite happy to swap the whole unit out completely for another make etc.

pms6.jpg

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I have no knowledge of your system but some have a charger that is connected to the mains via a kettle type lead that can become disconnected. So maybe have a look to see if you can find the charger. Make sure EHU is disconnected if you are removing panels. Also I assume you have checked the fuses, both 12v and mains that powers the charger?

Have you a multimeter that you could check the cables from battery to control panel for continuity? Sometimes there is a fuse in the 12v line from battery to fuse box that may be hidden. So checking continuity might help.

 

Sorry I can't be more specific.

 

PS do post back what you find.

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The very best person to Talk to is Paul at Apuljack Engineering.

He will Talk you through some checks and then advise what to do.

He specialise in caravan power supplies and can repair to better than new in most cases.

Give him a ring.

 www.apuljackengineering.co.uk

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thank you ched and brecon, ill have another look, if still no joy, ill give paul a call.

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took the pms 6 apart today, and not good news. The transformer/battery charger unit is not giving an out put. Checked voltage after the built in fuse, got 240v ac, but thats as far as it gets. Cleaned up fuse and holder, pcb tracks and joints and checked for continuity, and came to the professional conclusion, its Fu--ed.

Now to source a suitable aftermarket replacement and wire it in.

Everything else on the pms6 is working, apart from the 'pump on' led as i broke it, oops. 5 min job to put another led in place, should have some knocking about.

 

Also found out that after changing my 7 pin electrics on my insignia estate last week to 13 pin, then using a 13 to twin adaptor, I only have 1 switched supply. I honestly thought the adaptor would of linked the single switched in the 13 to both switched in the twin. No big deal as I'm changing out the twin on the caravan to 13 and will link the 2 switched lives.

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Posted (edited)
52 minutes ago, rugbytowbars said:

Also found out that after changing my 7 pin electrics on my insignia estate last week to 13 pin, then using a 13 to twin adaptor, I only have 1 switched supply. I honestly thought the adaptor would of linked the single switched in the 13 to both switched in the twin. No big deal as I'm changing out the twin on the caravan to 13 and will link the 2 switched lives.

I thought pin 9 was permanent +ve and pin 10 was ignition switched for fridge?

 

As for charger, I assume no capacitors were bulging as sometimes they age and dry out? 

I have no idea if you could do this but could you take the 240v feed from input to fuse to a new charger (via a new fuse) so you are not powering the duff charger. Then attach the output on new charger to the existing cables to the battery? All suitably fused and mains isolated while you do the work. I am assuming you are OK with electrics/electronics as you mention replacing leds...

If in doubt don't risk 'tinkering' with electrics....

Edited by Ched

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10 hours ago, rugbytowbars said:

took the pms 6 apart today, and not good news. The transformer/battery charger unit is not giving an out put. Checked voltage after the built in fuse, got 240v ac, but thats as far as it gets. Cleaned up fuse and holder, pcb tracks and joints and checked for continuity, and came to the professional conclusion, its Fu--ed.

Now to source a suitable aftermarket replacement and wire it in.

Everything else on the pms6 is working, apart from the 'pump on' led as i broke it, oops. 5 min job to put another led in place, should have some knocking about.

 

Also found out that after changing my 7 pin electrics on my insignia estate last week to 13 pin, then using a 13 to twin adaptor, I only have 1 switched supply. I honestly thought the adaptor would of linked the single switched in the 13 tohttp://www.expluginsteve.co.uk/spares-and-advice both switched in the twin. No big deal as I'm changing out the twin on the caravan to 13 and will link the 2 switched lives.

Hi

 for help and advice contact Steve

http://www.expluginsteve.co.uk/spares-and-advice

 

Dave

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