Question about Wss Pre-Wired VFX3648 Outback Flexware 7,200 watt 48VDC input 240VAC outpu

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No 12v output from aux terminals on a vfx 3648

Connected to a mate 3. system calls for generator to start but there is no 12v output from the inverter to start generator. Kohler 14res

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  • rheuer163 Nov 08, 2012

    Well all...thanks for your input but I was mislead by the installer. The inverter aux is used to drive the hydrogen exhaust fan in the battery box and only comes on when the batt voltage exceeds 50 volts such as when equalizing or bulk charging. The problem was in the DC flexNet box. The Aux function is used to start and stop generator. The controller board is what failed in the FlexNet. The Mate 3 Programs this usign the AGS function. All fixed. Thanks for all your input.

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Pretty sure it won't provide current to start anything. Just provides 12vdc at a low current to pull a relay in.
Manual say it is auto reset on the aux terminals for the generator start relay. 0.7 amps max.

http://www.wholesalesolar.com/pdf.folder/inverter%20pdf%20folder/Outback_fx_vfx_installationManual.pdf


If you still don't have the voltage there at the correct time (when called for), you unit is bad or has a fuse they don't mention in the manual. Remember!! This is a called for function so the voltage will not be there all the time, just when required as per the programming.

Posted on Nov 06, 2012

  • rheuer163 Nov 08, 2012

    Thanks. Problem solved...DC FlexNet starts and stops Gen using AGS function programmed by Mate 3. Inverter runs Hydrogen exhaust fan.

  • Wayne Holden Nov 08, 2012

    Sometimes it just takes a little more digging!

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How to test the electrical system of the generator for free


Ez test to determine if stator wiring is ok. This test works on generators that have two sets of 115v plugs and 220v plug. Use a 12v, 1amp ac power supply ( smaller ac power supply should work ok ). With generator not running, apply 12v to one of the 115v outlet plugs. Now verify 12v output voltage with meter at another 115v outlet on generator. Also verify that there is about twice the voltage at the 220 v outlet plug (should be about 20v - 24v) . If the adjoining 115 v outlet plug has no output or very little voltage or if the 220 volt plug has no output, most likely stator is damaged or breaker is off. If the stator is shorted voltage reading will be very low and power supply will heat up. If stator is open, there will be no voltage at second 115v plug or 220 v plug. If voltage is ok at the other outlet plugs as per test above then most likely problem is with voltage regulator, or brushes not making contact or armature winding open or just needs to be energized. Unplug the 12v power supply after test to prevent it from overheating. Most generators have two 115v windings that together power the 220v plug. When you energize one of the windings with the 12v power supply, the second 115v winding will be energized also and give you a voltage reading about equal to 12v. You will not damage the generator with this small voltage being input thru the plug. Good luck

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1 Answer

Have a 18kw generator that keeps draining battery. Put a new charge on battery and started up fine. Went on vacation and when I got back battery was dead. Put new battery in and same thing has happened....


I am assuming the generator is not being maintained by grid power when in standby.
I would suggest breaking the live feed from the battery + terminal through a cheap (or expensive) ameter, accuracy is not important.
Try disconnecting any wires feeding the various parts of the electric system to identify where the leakage is.
If there is no Identifiable leak being indicated by the ammeter then there may be an issue with the battery.
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1 Answer

On a 12 lead generator to achieve 480volts. would i have to tie 4 -7 5-8 6-9. 10 11 12 to neutral. and 1 2 3 are line leads. i can get 240 volts from my center taps, for my regulator. cause line to...


The terminals you listed are correct.
T4 -T7 mated
T5 -T8 mated
T6 -T9 mated
10, 11, 12 combined connection

L1, L2, & L3 = output / line leads

However you should have 277 VAC line to ground and 480 VAC Line to line (Across any 2 phases)

So terminals 1, 2 or 3 to ground should be 277 VAC (L1 L2 or L3)
1-2 or 1-3 = 480 VAC
any combination of
1 , 2, or 3 to each other = 480 VAC

As a "generator man" with 19 solutions one being "You might have to sting it" you should know this and be able to use the diagram on the power head to get your desired voltages unless the wiring data plate is missing. I have had to dial in voltage regulators when switching between 240 and 480 to prevent automatic shut downs from over / under voltage.

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The charging system is an integral part of the battery and starter systems. Since all of these systems work together, any diagnosis and testing should be done in conjunction.

The charging system is protected by a 12 gauge fusible link located in the A11 circuit. This fusible link is between the generator and the starter.

The generator ground is provided through a case ground in the generator to its attaching bracket. This generator uses a voltage regulator internal to the Powertrain Control Module (PCM)

When the vehicle is running, battery voltage is applied to the generator field terminal through the A142 circuit. This circuit is the output from the contact side of the Automatic Shut Down (ASD) relay. The ground, or voltage regulated side, of the generator field is controlled by the K20 circuit which connects to cavity 4 of the PCM connector.

When there is current present in the field, and the rotor is turning, the stator in the generator produces a B+ voltage that is supplied to the battery through the A11 and A0 circuits. The A11 circuit is connected to the output terminal of the generator and connects to the engine starter motor battery feed terminal. The A0 circuit is a direct feed line from the battery and connects to the engine starter motor.

Grounding for the system is accomplished at the battery negative terminal. These grounds connect to the engine and body.

HELPFUL INFORMATION
Inspect for a blown fusible link in the A11 circuit between the generator and the starter motor.

other Fusible link goes from the starter to the alternator. Thanks. Keep updated for any more query. You can rate this solution and show your appreciation.

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