Community Forums

hayward3411 · 02-25-2015, 03:32 PM

My control panel shows I have a fault, when plugged into 115v it shows AC overload, when on battery power it shows DC overload. I have performed both standard reset and a hard reset. I have the green power, red fault and green flashing charge lights on. I have disconnected both DC and AC power and let the inverter/converter sit overnight.

Magnum Energy MS series pure sine wave inverter/charger model MS2000

Walt Bennett · 02-25-2015, 04:47 PM

Have you called Magnum?

BatteryPro · 02-25-2015, 05:49 PM

Quote:

Originally Posted by hayward3411

My control panel shows I have a fault, when plugged into 115v it shows AC overload, when on battery power it shows DC overload. I have the green power, red fault and green flashing charge lights on....

If the inverter is installed properly, you will have a AC sub-panel with breakers that go to your inverter loads. You will also have a 30 amp breaker in your main panel that feeds AC power to the inverter.

1. Turn off all the breakers in the sub-panel.
2. Turn on the inverter.
3. If the Fault light comes on, you may have a bad control board or AC board.
4. If the Fault light does not come on, one by one turn the breakers on until the fault comes on. That circuit is causing the problem.

If the inverter is not installed properly:

1. Tell me why?
2. Tell me how it is installed.

Larry

hayward3411 · 02-25-2015, 06:05 PM

I emailed Magnum and got the standard reset info, I will call them.
The Magnum inverter/converter is installed in my 2009 fleetwood excursion. I keep it in a pole barn during the winter months plugged into a 110v plug. all was OK until a couple days ago when I noticed the fault light. I checked the house batteries and the voltage was 9.5v. I have since charged them and reset the inverter/converter with no luck. I will follow Larrys suggestion in the morning.
The odd thing is when I use the DC house batteries the inverter/converter remote panel indicates DC overload and when I use 110v it indicates AC overload?

Old Bounder · 02-25-2015, 06:36 PM

Quote:

Originally Posted by BatteryPro

If the inverter is installed properly, you will have a AC sub-panel with breakers that go to your inverter loads. .........

.......If the inverter is not installed properly:

1. Tell me why?
2. Tell me how it is installed.

Larry

That is only true for some models. The "B" models are designed to feed circuits directly and DO NOT feed a sub-panel.

hayward3411 · 02-25-2015, 06:55 PM

I do not have a seperate sub panel, there are 2 resets on the inverter side going to the inverted power outlets.

hayward3411 · 02-26-2015, 05:55 AM

Has anybody opened up the box, are there and mechanical relays etc I can look at or does it contain electronic boards?

hayward3411 · 02-26-2015, 07:03 AM

Here is my update: After the house batteries were on charge (standalone charger) overnight the voltage was 11.2v DC, the fault on remote was DC Low Voltage. I started the gen and the batteries charged for a few minutes before AC overload fault showed it's ugly face. I am going to let the batteries fully charge. I will update on Friday. I hope the issue was low DC voltage!

Walt Bennett · 02-26-2015, 07:23 AM

Quote:

Originally Posted by hayward3411

Here is my update: After the house batteries were on charge (standalone charger) overnight the voltage was 11.2v DC, the fault on remote was DC Low Voltage. I started the gen and the batteries charged for a few minutes before AC overload fault showed it's ugly face. I am going to let the batteries fully charge. I will update on Friday. I hope the issue was low DC voltage!

That's way too low. They were discharged to the point they may be damaged. Once you get them up to the point where you don't have a DC Low error, you may find that everything else works OK, but I'd be saving up for new house batteries.

BatteryPro · 02-26-2015, 09:17 AM

Quote:

Originally Posted by Old Bounder

That is only true for some models. The "B" models are designed to feed circuits directly and DO NOT feed a sub-panel.

Correct if that is the model but she said it was a MS2000, not MS2000-20B.

BatteryPro · 02-26-2015, 09:30 AM

Quote:

Originally Posted by hayward3411

I do not have a seperate sub panel, there are 2 resets on the inverter side going to the inverted power outlets.

That means you have a MS2000-15B or MS2000-20B model inverter, not a MS2000. That also makes it simple to diagnose.

Originally you said the fault was AC overload. That is not related to battery voltage but to the current flowing through the transfer relay inside the inverter. You are getting a DC overload when you power the inverter because it is trying to make power for the AC which is overloaded plus charge the battery.

Perform the following to find the problem.

1. Turn off the two breakers.
2. Turn on the inverter.
3. If fault occurs you have a bad control or AC board.
4. If no fault occurs, turn on one breaker at a time to see which circuit is causing the fault.

That circuit has too large a load for the 30 amp relay.

Larry

BatteryPro · 02-26-2015, 10:27 AM

Quote:

Originally Posted by hayward3411

Has anybody opened up the box, are there and mechanical relays etc I can look at or does it contain electronic boards?

The Magnum MS2000 series uses a single Deltrol 30 amp relay. Other models use two 30 amp relays. I [moderator edit] have not seen the relays fail.

Larry

hayward3411 · 02-26-2015, 12:09 PM

I have the MS2000 20B, the DC voltage is up to 12v, the batteries are less than 2 years old. I will try it in the morning..........Thanks

Old Bounder · 02-26-2015, 05:10 PM

Quote:

Originally Posted by BatteryPro

Originally you said the fault was AC overload. That is not related to battery voltage but to the current flowing through the transfer relay inside the inverter.

This is a basically true statement, BUT, it most likely is related to battery voltage, do to the charger drawing off so much of the incoming current, trying to recharge those very low house batteries, that there isn't enough left to pass on through to the down line circuits. Thus an AC OVERLOAD.

Quote:

Originally Posted by BatteryPro

You are getting a DC overload when you power the inverter because it is trying to make power for the AC which is overloaded plus charge the battery.

The DC overload is happening because the voltage is falling below the threshold for creating reliable AC from the inverter.

The AC output is probably NOT overloaded in this mode, (AND the batteries are NOT being charged by the inverter as stated). The battery voltage is simply too low and is being OVERLOADED.

Check the water level in your batteries and ensure that they can be recharged to 13.2V or higher. If not, replace them.