EHU alarm not working nor Omnistep retracting on start up

[Paul Gosbee]

Hi There
My 2003 Autoteail Dakota based on a Merc 316 chassis has has developed two faults.
1) the Omnistep does not retract automatically on starting the engine. It always has done then stopped yesterday.
2) The EHU 240v warning alarm now fails to sound if you start the engine with the 250v still attached and working. Again it always used to. Any ideas as to the faults. It has a new Sargent EC328 fitted this February with new control panel.
Thanks

 

[Speve]

Sounds a bit like a fuse that protects both has blown

 

[Lenny HB]

Could be a fault on the D+ circuit from the alternator.

 

[Paul Gosbee]

Thanks for that. All the fuses on the Control unit are fine and on the vehicle side too. How do I check the D+ circuit?

 

[DavidG58]

Thanks for that. All the fuses on the Control unit are fine and on the vehicle side too. How do I check the D+ circuit?

ours failed, another clue would be if you have an AES fridge does that swap to battery when started

ours is a Mercedes 518 chassis and the relay is under drivers seat on ours which is RHD and luckily has a door that side

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[Paul Gosbee]

Rhanks for that but we have a Dometic fridge that has a manual switch to change from 12v, 240v or gas.

 

[rb62]

Fuse in the EM50 ? ours used to be on the floor behind the drivers seat.

Autotrail EM50

Diabalo submitted a new resource: Autotrail EM50 - Auto- trail Vehicle interface Auto-Trail EM50 info Read more about this resource...

www.motorhomefun.co.uk

 

[Paul Gosbee]

Hi Alarm

EHU alarm and step all seem to be working again without any fettling how strange?? Thanks for all the helpful advice.