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Power Supply Unit Packed Up


springtime
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Hi

It looks like the PSU in my Lunar Solaris has packed up.

Quite frankly I'm not that surprised as the van is constantly on an EHU and I have noticed that the unit has been getting warm so maybe it overheated in the hot weather.

It's a 20amp unit - does anybody know where I can get a replacement, I'm hoping that it shouldn't be too difficult to fit :unsure:

Willerby Avonmore previous kit VW Splitty Camper,Ford Transit Camper, Commer Highwayman, Sprite Alpine Caravan, Rapids Export Folding Caravan, Fiat Autosleeper Harmony, Ci Granduca Motorhome, McLouis Glen 432 Motorhome, American RV Trail-Lite twin slide outs 8.2ltr petrol/lpg, Lunar Solaris Limited Edition Caravan.

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Hi

It looks like the PSU in my Lunar Solaris has packed up.

Quite frankly I'm not that surprised as the van is constantly on an EHU and I have noticed that the unit has been getting warm so maybe it overheated in the hot weather.

It's a 20amp unit - does anybody know where I can get a replacement, I'm hoping that it shouldn't be too difficult to fit :unsure:

 

 

It's probably cheaper to get it repaired (and upgraded!) by a specialist.

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The common problem is that the cooling fan either fails or the circuit driving it does not do so. In most cases if the unit has got too hot at best it will be a blown fuse, at worst a blown switching transistor or failed fan. Switched mode power supplies (SMPS) do run slightly warm but it is unlikely that overheating is the cause of the problem as the regulators (the bits that cause the heat) are internally thermally protected.

 

If it is just a switching transistor or fan that has failed then repair is well possible. If it is the sensing circuit then it would probably not be cost effective as those circuits often use surface mounted devices which are difficult to diagnose and to change - even with a full circuit diagram to hand!

 

Take the unit out and have a look at it. Make sure if it uses a kettle plug connector that said plug is hard home - they often fall out if not retained. Check any externally accessible fuses, even power the unit on the bench and see if there is any output voltage. If it has failed then Google is your friend. So long as you can get a replacement of the same physical size there is no need to bother your local and doubtless frighteningly expensive caravan dealer.

2018 Passat B8 Estate 150GT TDi150 towing a 2018 Bailey Unicorn S4 Seville

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Well, I've got the unit out and had to drill out two rivets to get the cover off.

It's a bit of a mess inside - smells of burning electrics and 2 capacitors have burst and deposited their contents on the circuit board.

There is also evidence of burning on other parts of the circuit board so it looks like it is a write off.

I have ordered a new one from these people http://www. ebay. co. uk/itm/201124678679?_trksid=p2059210. m2749. l2649&ssPageName=STRK%3AMEBIDX%3AIT

Should get it in 3 to 4 days, I'll update you when received and fitted.

 

Steve

Willerby Avonmore previous kit VW Splitty Camper,Ford Transit Camper, Commer Highwayman, Sprite Alpine Caravan, Rapids Export Folding Caravan, Fiat Autosleeper Harmony, Ci Granduca Motorhome, McLouis Glen 432 Motorhome, American RV Trail-Lite twin slide outs 8.2ltr petrol/lpg, Lunar Solaris Limited Edition Caravan.

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If it is unlikely it failed through overheating is there anything else that needs checking before putting a replacement at risk?

 

Our PSU went and was discovered first night out on a long trip. Our dealer agreed to refund the replacement price under warranty and I picked a new one up at a local caravan spares store for £120. It was a simple couple of plugs job to fit, after removing fiddly bits of surrounding furniture.

I've got nothing to do on this hot afternoon

but to settle down and write you a line.

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Well it arrived at 12:30, fitted and running at 12:35 - just a 5 minute job.

I can hear the fan running on this one which wasn't the case on the old unit before it packed up - no wonder it overheated.

Battery now charging, everything seems to be AOK :D

Edited by springtime

Willerby Avonmore previous kit VW Splitty Camper,Ford Transit Camper, Commer Highwayman, Sprite Alpine Caravan, Rapids Export Folding Caravan, Fiat Autosleeper Harmony, Ci Granduca Motorhome, McLouis Glen 432 Motorhome, American RV Trail-Lite twin slide outs 8.2ltr petrol/lpg, Lunar Solaris Limited Edition Caravan.

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