AGS Coming On By Itself

Had that happen, Magnum tech told be to clean the wiring harnesses plugs at the generator. Never happened again

The magnum also has a sensor for RV temperature inside. It may be that the inside temp rose too high and the genny came on. The theory is that a temp rise causes the genny to start which starts the A/C if it is turned on.

did it start based on temperature?
Do you have a periodic exercise run programmed in?
Do you have it programmed to start as a load shave feature. (I forget what Magnum calls that.) Did a mouse chew thru some wires and make it short out somewhere?
Do you have it programmed to start at a certain time?
It's quite possible that you have accidentally programmed one or more of these reasons for it to start.

larry cad wrote:
The magnum also has a sensor for RV temperature inside. It may be that the inside temp rose too high and the genny came on. The theory is that a temp rise causes the genny to start which starts the A/C if it is turned on.

Explain which model you are talking about. I know of NO Magnum and its optional AGS module that has an Interior temp sensor connected to it. There are AC systems that a Magnum can COMMUNICATE with to start the Genset when the AC system calls for cool. But, you have to program that and engage the AGS system to be ON. AND, If you are plugged into Shore Power, that disengages the Temp control system from starting the Genset unless you lose Shore Power. Doug

KD4UPL wrote:
did it start based on temperature?
Do you have a periodic exercise run programmed in?
Do you have it programmed to start as a load shave feature. (I forget what Magnum calls that.) Did a mouse chew thru some wires and make it short out somewhere?
Do you have it programmed to start at a certain time?
It's quite possible that you have accidentally programmed one or more of these reasons for it to start.

If the rv was plugged into it's 50 amp service wouldn't that make all your points null ? Except for the mouse theory !

SPRING STREET wrote:

KD4UPL wrote:
did it start based on temperature?
Do you have a periodic exercise run programmed in?
Do you have it programmed to start as a load shave feature. (I forget what Magnum calls that.) Did a mouse chew thru some wires and make it short out somewhere?
Do you have it programmed to start at a certain time?
It's quite possible that you have accidentally programmed one or more of these reasons for it to start.

If the rv was plugged into it's 50 amp service wouldn't that make all your points null ? Except for the mouse theory !

I don't see why it would. Plugged into shore power or not the programming could still be set up to make the gen start under various conditions. Not that you'd want to program it that way but it could have been done accidentally.

dougrainer wrote:

larry cad wrote:
The magnum also has a sensor for RV temperature inside. It may be that the inside temp rose too high and the genny came on. The theory is that a temp rise causes the genny to start which starts the A/C if it is turned on.

Explain which model you are talking about. I know of NO Magnum and its optional AGS module that has an Interior temp sensor connected to it. There are AC systems that a Magnum can COMMUNICATE with to start the Genset when the AC system calls for cool. But, you have to program that and engage the AGS system to be ON. AND, If you are plugged into Shore Power, that disengages the Temp control system from starting the Genset unless you lose Shore Power. Doug

Every Magnum AGS I've ever seen has an input for a temp sensor. The last one I installed came with the temp sensor in the box. They will work with pretty much every Magnum inverter ever made. I'll not list all the models.

KD4UPL wrote:

dougrainer wrote:

larry cad wrote:
The magnum also has a sensor for RV temperature inside. It may be that the inside temp rose too high and the genny came on. The theory is that a temp rise causes the genny to start which starts the A/C if it is turned on.

Explain which model you are talking about. I know of NO Magnum and its optional AGS module that has an Interior temp sensor connected to it. There are AC systems that a Magnum can COMMUNICATE with to start the Genset when the AC system calls for cool. But, you have to program that and engage the AGS system to be ON. AND, If you are plugged into Shore Power, that disengages the Temp control system from starting the Genset unless you lose Shore Power. Doug

Every Magnum AGS I've ever seen has an input for a temp sensor. The last one I installed came with the temp sensor in the box. They will work with pretty much every Magnum inverter ever made. I'll not list all the models.

OK, That is called a BTS Temp sensor. BATTERY TEMP SENSOR. Has nothing to do with the interior AC control system. You attach that sensor to a Coach battery post for Temp monitor charging. If you installed that BTS inside the RV, I suggest you go back and READ the directions. Doug

PS, maybe more explanation is needed
1. The Inverter/Charger does NOT have Roof AC AGS connections or capability. It does have a network plug for the optional AGS module
2. The 2 Magnum separate AGS modules do have the capability to use interior RV temp to start the genset with or without a Magnum Inverter/Charger.
3. BUT, for this capability, you MUST use the Magnum AGS optional kits.
4. The Magnum remote panel has the Interior temp sensor in the remote switch. So, it must be installed in a location where it will correctly sense the interior temp of the RV, which most OEM's do NOT install the remote switch where it is best located for interior temp sensing.

SPRING STREET wrote:
RV is sitting at home plugged in! Went outside this morning and heard the genny starting up. Went to breaker box to make sure nothing had tripped, all as should be. My setting on the Magnum Energy system was set to enable. Just don't understand why it would come on by itself ? HELPAGS Coming On By Itself

From the Magnum manual for BOTH Magnum AGS modules. Doug

Auto start is locked out when utility power is present

dalsn1 wrote:
Had that happen, Magnum tech told be to clean the wiring harnesses plugs at the generator. Never happened again

IF you have the Onan Genset. As the OP above stated. Disconnect the remote quick connect at the Genset. LOOK at the small pins that plug together. They usually have corrosion in that plug and if moist will cause the Genset to start. Remember, the Start and Stop of most Gensets is a closing of a ground between 2 pins. So, if corroded or moist that is enough to start a Run sequence. Doug

PS, in very rare cases, a Onan Genset that got extremely wet from rain sitting still, enough water got into the control housing and was enough to start the Genset