RV: No 12v on hookup

Bryan · 02-12-2009, 22:18

Hi,

RV is on hookup and my understanding is that this means that all the 12v stuff is powered from the converter and the charger will also charge the battery.

Just gone out to the rig and not only is the battery flat but the 12v systems are not working either.

What (and how) should I start testing?

Bryan

American Dream · 02-12-2009, 22:24

Good Luck Bryan.

Better get some charge in those batteries first or they'll be bricks.

I assume they have been charging ok throughout the year.

All 230 volt apps are powered up ok I assume?

All trips ok on the power board?Power into converter ok?

What unit is installed in your rig?

Road Runner · 02-12-2009, 22:33

Check you battery leads and terminals.

I had a similar problem

Bryan · 02-12-2009, 22:39

Quote:

Originally Posted by American Dream

Good Luck Bryan.

Better get some charge in those batteries first or they'll be bricks.

I assume they have been charging ok throughout the year.

All 230 volt apps are powered up ok I assume?

All trips ok on the power board?Power into converter ok?

What unit is installed in your rig?

All 230v okay.
All 110v okay
All trips okay
Power INTO converter?? How would I know?

Can't comment on historical as only recently got the RV. However a recent weekend away on hookup and 12v ran off the hookup then ( I think so anyway).

American Dream · 02-12-2009, 22:47

Quote:

Originally Posted by Bryan

All 230v okay.
All 110v okay
All trips okay
Power INTO converter?? How would I know?

Can't comment on historical as only recently got the RV. However a recent weekend away on hookup and 12v ran off the hookup then ( I think so anyway).

Or was it residual charge while driving that you were using?

Any noise at all from the power converter/transformer?

What unit is it Bryan?

Bryan · 02-12-2009, 22:56

Quote:

Originally Posted by American Dream

Or was it residual charge while driving that you were using?

Any noise at all from the power converter/transformer?

What unit is it Bryan?

away for 2 nights and only one 85 amp battery. Lights etc very bright and used blown heating for a short blast with no dimming etc. leads me to believe that 12v coming form hookup/converter.

Parallax 7355 and it is making a low hum

big map · 02-12-2009, 22:58

Hi, Have you checked the 12v isolater switch is on. Most RVs have a small switch which needs to be on for the batteries to charge, this switch must be on before connecting up to 240v. It seems to be that these switches are normally located near the entrance door.

Mike

American Dream · 02-12-2009, 23:05

Quote:

Originally Posted by Bryan

away for 2 nights and only one 85 amp battery. Lights etc very bright and used blown heating for a short blast with no dimming etc. leads me to believe that 12v coming form hookup/converter.

Parallax 7355 and it is making a low hum

So We can assume power ok into it.

Are you able to measure output? Do You have a Multimeter?

Any Inline fuses to the batteries?Do you have a fuseboard as in the pic?

Parallax 7300 series are single-stage output converters providing a single voltage output of 13.8 VDC to the DC system for load and battery charging.

Does this help? http://parallaxpower.com/Dist_Panl/FB%20Series.pdf

I thought there was a Relay in the circuit too.Mine's in the engine bay.

Mike might have the answer there.