harmony mangement system

Mids,
On my 2019 Nuevo the water heaters symbol below the autofill symbol is present all the time regardless of the content of either tank.  I am not qualified to give a diagnosis but I had a similar problem for my first few weeks of ownership which was a combination of the EC700 requiring a software refresh which included an upgrade and incorrect Advanced Settings on the EC700.  It isn't explained in the Harmony Manual but if you hold down the Settings button it will eventually take you to Advanced Settings. On page 1 of Advanced Settings on the right is a setting for the water heaters.  Mine had gone to off which resulted in the heater symbols disappearing.  You could try checking the Advanced Settings but if they are wrong it may be symptomatic of a software problem which only the dealership can correct.

I would check with your dealer or Sergant direct that the rest of your advanced settings are correct.  In one was wrong, others may also be wrong.  This was my experience.  Happy to compare your advanced settings with mine if you wish.

That’s interesting that someone else has experienced the No 10 en route fuse blowing.  I got through 5 fuses and each time it disabled the Combi and step.  Hopefully the adjustment of the step time to 3000 ms will solve it.

Kids,

Fingers crossed it has solved it.  I also changed the Advanced Setting for ‘ En Route’ to active for good measure.  After Willersey made the step time alteration we were away in our Nuevo for 7 nights and I have been constantly in and out the van on our drive ever since.  We are away now for another 4 days.  I have a good supply of red 10 amp fuses just in case and a mirror and head torch should I need to reset the Combi to clear and fault codes (514) that might arise.  The only lingering doubt I have is then when I spoke last week to an engineer at Sargent in Beverley E Yorkshire he was a bit sceptical about it even though it was Sergant who had recommended to Willersey to change the setting.

Mids,

We as ‘users’ are not supposed to access Advanced Settings which is why it is not covered in the Harmony Manual.  I only know about it as my dealer told me about it to rectify the Advanced Settings which had a mind of their own and were changing.  This and a faulty internal clock were caused by software errors in the EC700 which were not corrected until the software was upgraded by the dealer some weeks after I took delivery of the Nuevo.  My problems were exacerbated by not knowing of or having the Harmony Manual! Even the dealer didn’t know about it.  It was only when I remonstrated directly to AS about their poor documentation that I was sent one in the post.

My step time was 6000 ms but was changed a couple of weeks ago by the AS Service Centre to 3000 ms to overcome the No 10 fuse problem I was having.  

The ENROUTE Advanced Setting is to allow the Combi to be used with gas whilst driving.  I can’t imagine ever wanting to use this but our motorhomes are set up for it providing the Advanced Setting is set to Active.  Mine was set to off but is now Active.  My logic for changing it to Active were that is what it should be (confirmed by Sergant) but also for the Combi to work when driving it must have a 12v supply and the No 10 fuse you will see is for enroute/awning and when it blows it stops the 12 v supply to the Combi which stops it working in all circumstances.

Mids,

The fact that you have a 2019 Broadway and I have a 2019 Nuevo shouldn't make any difference.  I spoke to another 2019 Nuevo owner who confirmed that his ENROUTE is set to Active. I attribute mine being incorrectly set to the earlier software problem I had and the dealer who didn't check the Advanced Settings were all correct after he upgraded the software.  It's easy to check if your software has been upgraded. If it hasn't been upgraded the EC700 Control Panel will replicate under Settings (Not Advanced Settings) the functionality of the Truma Control Panel.  If it has been upgraded, this replication will be removed from the EC700 Control Panel.