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It doesn't appear to be the case based on what wire connections I could spot in the pic. I'm hoping the OP does the tests I suggested so we can get to the bottom of the LEDs not lighting when the button is pushed.

You're most right Guy! Close up pictures of each switch and gauge that the wires go to would be great. A closeup up of part number on the strange connector. Also a close up picture of the pin side of the connector like in your original post but much closer. Hopefully the pin location markings...

Guy, I think the problem is either no power to the monitor or it's shot. The OP indicated the Fault Reset button won't illuminate any of the LED's. Looking at my schematic of the Fault Monitor if the Reset button won't illuminate all the LED's then there is a basic problem. synelecpb Two...

If the Concord is stuck at 2.5 v it's very likely it's badly sulphated and beyond hope. A pair of 12v motorcycle batteries work well. I have them in both of my 831's. I'll spend some time tomorrow and try and give you a couple of things to measure to troubleshoot the fault monitor.

:lol: Because of 69birdman's zinger ;-) I took a close look at the picture to see where the wires got to from the mystery plug. Yes - it's a Remote Start cable. It allow the generator to be Pre-Heated, Remote Started, the contactor to be closed and I *think* remotely see the AC voltage. From...

Very odd. I suspect it's a remote start connector judging by the way it's routed to the switch's on the control panel and the round hole on the left cabinet wall.

The firmware, as designed, does not automatically start the generator for the purpose of charging he generators batteries when they eventually start to drop in voltage. The battery voltage can be monitored via WiFi when the generator is off to determine when the batteries might need topping...

https://www.steelsoldiers.com/showthread.php?155865-Manuals-for-the-MEP-831A

Guy, Maybe you're thinking of this thread about using the SX460. https://www.steelsoldiers.com/showthread.php?177057-Alternative-AVR-for-MEP-803a&highlight=SX460

A Samlex Inverter A modified sine inverter output is extreme THD - LOL Yes - Modified Sine Wave inverters can kill sensitive electronics such as chargers. They also cause a lot of excessive heating in motor windings. The output of a typical modified sine wave inverter below. Just nasty...

THD is Total Harmonic Distortion. An ideal AC voltage is a pure sine wave with absolutely no distortion to the "signal". Something close to this.. Usually THD on a cheap inverter or cheap generators output usually appears as noise and sometimes distortion of the sine wave. This example shows...

I looked at these a couple of weeks ago but ruled them out due to their poor THD specification. The Manual for the 24V 2200 specs the THD at: "an average THD of 15% (min 5%, max 25%) depending of load connected and the battery voltage" If your loads aren't fussy about THD then it may be OK for...

Guy, Thx for checking with CECOM on that.

Remove the wires to terminals 7 & 8 of the Voltage Regulator and put tape on each of the lugs so they can't touch anything or each other. This will prevent the regulator from being powered by the generator heads quad winding. * WARNING - The generator will still output ~120/240 volts when you...

Correct SR1 below is the Slave Port

I suspect it's possible to hook two 831's in parallel. To my understanding the 831's inverter is actually two inverters working in tandem. When in 120 mode the two inverters inside are synchronized so they can work in parallel. In 240 mode they operate 180 degrees out of phase and connect in...

J14 that Colt needs is a Molex ‎0003092022. $0.23 The pins are Molex ‎0002092103‎. $0.16 each The fan cord is a Guardtec and looks like PN HP50-24 will work. It has 24" leads to work with. $0.85 These are all avalailble thru DigiKey.

The airflow direction is OUT of the cabinet. As for the wiring it's on the picture you posted. But to clarify it's... 101H18 goes to P14-1. J14-1 goes to the thermostat S21 pin 1. Thermostat S21 pin 2 goes to the fan pin 1. (This is the hot leg being fed by L1 from the inverter.) 102N18 goes...

The battery charger in the 831 can only output a few amps so it's not going to charge an external battery very fast. The spec sheet for the charger doesn't clearly specify it's output capability but it eludes to it being capable of something between 3 and 7 amps. Of course the 831 will use some...

I don't believe it's possible. Unlike all the other MEP's the 831 in inverter based. Other MEP's can be synchronized by adjusting the engine RPM to get their AC output waveforms synchronized. With the 831's you have no control over the AC output waveform timing.