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Old 08-20-2020, 09:43 AM   #21
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I can't get a response to my telephone calls to Dimensions (all phones are busy) so I don't even know if it is possible to send my unit in for repair? Thanks to all the input from members here....
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Old 08-20-2020, 09:56 AM   #22
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Quote:
Originally Posted by buford View Post
just can't seem to get the battery charger to go. I have the cover off the inverter/charger but don't want to start poking around in there. Looks mighty complex!
Have you put a multimeter on the battery posts when plugged in and the inverter is supposed to be charging? What voltage did you see when you did that?
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Old 08-20-2020, 09:59 AM   #23
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I can't get a response to my telephone calls to Dimensions (all phones are busy) so I don't even know if it is possible to send my unit in for repair? Thanks to all the input from members here....
Here's their Email address for Tech Support:

[email protected]

Can't hurt to ask. Make sure you mention the model number and the serial number in the email. Otherwise the first email back from them will be them asking for that info.

But seriously, put a meter on those batteries - before plugging in and then after.

My Inverter/Charger has an Off/On button for my charger... does yours? It's on the control panel inside the RV's Tech cabinet.
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Old 08-20-2020, 10:19 AM   #24
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For most of us, I feel it worthwhile to know what makes an item like the charger work but I do not expect most of us will find it worthwhile to try to repair any internal problems with something as complex as inverter, converters or chargers as they are just too complex with way too little information to begin testing.
That leaves me to check for input and output but no need to remove the cover for looking further.
Back in post 10, there is a picture of the breakers which feed power in and show power out, so I would suggest testing those posts as simple and easy enough for those who use meters but I would not try to go further as the odds are just simply not worth the effort for me.
We have reached a point where even the repair shops who do electronic repair rarely go into repair components but just simply do board changes.
In this case, if I found power going in but not coming out, I would go for replacement.
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Old 08-20-2020, 10:47 AM   #25
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Here's a datasheet for what I believe is your inverter/charger:

https://www.magnum-dimensions.com/si...Kw%20final.pdf

The model number for your Inverter/Charger should be WIN-12X20B3R1T. I found a YouTube video of a guy fixing one of these and he said as of 2017 that Magnum will not fix or sell parts for this Inverter.

The control panel inside your RV (it's actually called a "remote.") has buttons on it to turn things on and off.

I was searching and found some other people with your model number and the charger failed. But when they spoke to Magnum they gave them a "reboot" procedure to try to fix things.

In this guy's case it didn't help. But you should try this... here's the Dimensions RESET proceedure:

Press the 'inverter & reset on/off' button 3 TIMES to reset/turn it on

What does your Remote inside the RV say when it should be charging? The remote details the charging mode, the voltage and the amount of amps being put into the battery. What does yours say on that remote.

Here's a photo of the Remote and what the reading looks like when it's charging:
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Old 08-23-2020, 03:06 PM   #26
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The Dimensions Remote Display will give you all the relevant information you need. However, I assume this is why the OP thinks his charger has failed?

If my Remote Display showed no charge it would also illuminate a red LED to signal a problem.

Keep in mind the charger will only work when you have shore power or the generator working.

Remember, L1 power (120V) out of the Main Power Panel is fed to the Dimensions Inverter internal transfer switch; and when it does not sense 120V-in then the Inverter is supposed to automatically turn on and produce 120V out of your 12V battery bank; and then it sends this power to the 30A Sub-Power Panel (where you will see 20A & 15A circuit breakers).

The charger is a separate board inside the Dimensions inverter, but it still requires 120V shore power or 120V generator power for the inverter section to operate.

If my Dimensions Charger failed I would do the following:


* Check your power panel for 13.2+V, which would tell you if you are getting a charge; and then back that up with a multi-meter reading at the battery bank.

* Find your battery temp sensor... at the inverter end... and un-clip the 2 wires (red and black). These wires lead to a thermal resistor that connects to the NEGATIVE battery terminal; and it is used as a safety "off" switch so you don't melt you batteries by over charging them. And if this thermal sensor fails or more likely breaks a wire at the eye-ring on the battery end, then that could be your problem.

I just replaced my Battery Temp Sensor (BTS) and I ohm'd the new sensor at 16.5K ohms. Note: Room temp is 22K ohms; and the sensor drops the ohm rating as it heats up. Anyway, that's TMI. You can get this part from Sensata-Dimensions. (Part # #611622-15, where 15 is the feet you need.)

What you need to do is to verify your red and black wires to the sensor have resistance.

Next you want to verify your red & black wires to the inverter show 4.5V? ...And if not then will either know your sensor needs to be replaced or you might have a dead charger board inside your working Dimensions Inverter.

* From all I have heard, the charger board will fail before the inverter, but I think it would be an easy upgrade to:

A) Buy a 45A Converter-Charger (I like the Progressive Dynamics Wizard Charger) and then you just mount it in your inverter bay... and power it by plugging into the engine block heater if you have one; or you can connect it to your transfer switch output, but I would prefer to have a hot line protected by a circuit breaker. So if you do not have a 120V wall socket in your inverter bay, you might consider adding one.

OR...

B) Buy the Victron Smart Blue Charger (IP-67) with 25A and just mount it inside your bedroom (or near your battery bank)... and plug it into a wall socket where you can just "pull the power" when you want to turn it off... like when you drive so your inverter is not powering the external charger.

I choose the Victron IP67-17A, because my Dimensions Charger is working just fine and I did not want to FAST CHARGE my house batteries. So I use the Victron now as my main battery charger; and I just turn the Dimension Charger "off" at the Remote Panel. ...but should I ever need a fast charge, then I will turn it on.

I like the Victron Bluetooth App too, but I really bought it for it's advanced battery charging algorithms.

Amazon $133: https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1

Note: The Victron charger makes no noise, but it gets warm. So I used 4 plastic spacers between the charger and the wood cabinet.... then I ran the wires behind the drawers and into the battery bay through a solar power duct I installed years ago. It was a simple installation and I think I now have a better battery charger that MAY lead to longer house battery life. TBD.

Note: The Victron 25A charger is more expensive, but maybe worth while if your Inverter Charger crapped out.

* Truth is: My 420A Battery bank is only good for 225AH if you follow the 50% rule of recharging your batteries at this point.

* So all I really need is a charger that can charge 225AH in a reasonable amount of time. And with a 17A charger it will only take 13.2 hours to fully recharge my battery bank... in theory.

* In actuality, it will take 20hrs to complete a 50% SOC charge cycle and that's never a problem for me since I always stay more than 1 day when I have shore power available.

* Therefore, I use to think buying a 100A charger was the best way to go, but I have since learned the best way to charge a bank of batteries is to use a new technology charger... and to charge it slowly! ...NOT FAST!

* The faster you charge your house batteries the more likely you will only reach 90% SOC... or less over time.
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Old 09-01-2020, 05:13 PM   #27
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Well here I am again...I have replaced the 1000 watt Dimensions inverter/charger with and Aims 1250 watt inverter charger...it seems to work OK and I am in the process of tweaking the adjustments on it to get all the stuff honed in. The Aims unit is a "Smart Inverter/Charger" and I think it is way smarter than I am!. Anyway I am glad to have this on the way to repaired status.
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