Desperate - Fleetwood 640-I Dometic Fridge problem

[selwyn29]

Hi all

We upgraded our 600ES to a 640-I yesterday. We saw it all set up and working before purchase. We towed it home using the 2 connector tow rope (grey and black) and once on our drive noticed a loud buzzing noise coming from the consumer unit.

We tried everything to stop the noise but couldn't. We noticed that the control board for the fridge was only partially lighting up (3 way control between battery, mains and gas LED wasn't lit) and the Alde heating control panel was also not lit up.

The only way to stop this very loud noise was to disconnect the electric and the battery and at the moment the caravan is totally unusable

Furious googling found that there is a fault with the Dometic RM7651L PCB which can overload on 12V as an additional wire grounding it is needed to be fitted. We think that the fridge has never been run on 12V during the caravan's life and towing home with the 12V connected did this.

Has anyone come across this before? Does anyone know how to fix or any engineers who know?

Many thanks
Charlie

[richardB]

Does the problem carry on if you turn the fridge to OFF ? and if it stops will the fridge work on gas and 240v,if it does the previous owner might not have used it on 12v for that reason.

[Webmaster]

If it is a 2008 Heritage and have disconnected the battery without covering the solar panel you may need to reset the controller. Check out the link below - note you need to be signed into the website to access



O'Leary's are agents for Dometic and may be able to help with spares for your fridge.

Re the PDU Unit - you may have faulty relay which can cause the fridge to malfunction on 12v. You can get one for around £10 if you are able to replace yourself. Alternatively M.E.S. can still supply new units for GBP290 (2017 price) and also repair the units. One member had theirs repaired (cost GBP80) and was effected within three days of receipt.

Contact details are as follows:-
MES
Unit2A Harris Road
Wedgnock Industrial Estate
Warwick CV34 5JU
PH:- 01926 499756
Fax:-01926 410327
Email: julie@meslimited.net

[selwyn29]

Many thanks for the replies so far, we are going to try the reset shortly.

We removed the battery and charged it overnight and replaced it today fully charged and the PCU was still making the loud buzzing noise, the only way to stop the noise is by removing the battery fuse and the circuit breaker which is hand labelled fridge charger.

Going to ring MES next

Charlie

[selwyn29]

Update

We performed the reset instructions and discovered that unplugging the controller makes the noise stop, so can only assume the issue is in the controller - got a new battery arriving tomorrow so fingers crossed that works, but does anyone know where you can get a new controller?

[Webmaster]

Try M.E.S.

Good Luck

[richardB]

Can I suggest you log in to the 'technical section' where another member is having a similar problem.You can contact them to see if they have had any luck solving the problem. The technical advise from the club has come via the 'webmaster'