Intellitec EMS Question

[dapperphil]

I have 2002 Monaco Windsor that I've owned for 2 weeks and it came without an Owners Manual.

When I am on shore power the EMS display panel service type
is at 50 amps, which makes sense.

When I switch to the Generator the service type goes to 30 amps,
and I loose one of my a/c units. I'm sure the service type should go to
Generator but it doesn't.

I checked the output from the generator side of the transfer switch and both legs are correct at 120 volts.

Is there a way to reset the system or anything else I should be checking
to make this right? Is there a way to override the system?

Any help will be appreciated
Phil

[nodine]

Quote:

Originally Posted by dapperphil I have 2002 Monaco Windsor that I've owned for 2 weeks and it came without an Owners Manual. When I am on shore power the EMS display panel service type is at 50 amps, which makes sense. When I switch to the Generator the service type goes to 30 amps, and I loose one of my a/c units. I'm sure the service type should go to Generator but it doesn't. I checked the output from the generator side of the transfer switch and both legs are correct at 120 volts. Is there a way to reset the system or anything else I should be checking to make this right? Is there a way to override the system? Any help will be appreciated Phil

I know the subject of resetting the EMS has come up before and I believe the method is to remove the AC distribution panel and locate the EMS fuse and pull it for a few seconds and then replace it.

Bob

[Luv2go]

If resetting the EMS does not work, here's another thing to try:

Generator operation is sensed by the EMS using a 12V signal from the generator. Looking at page 15 of this manual (I picked one of the 3 or 4 models as I don't know exactly which one you have) there is a +12V Ger Run signal going into J2-2. The voltage on that wire should be 0V with the Gen off, 12V (12-15V, depending on battery state), with the Gen on. There is probably a fuse on this wire between the gen and the EMS, so if the voltage is not there you will have to find it.

Stewart

[dapperphil]

Thank you nodine & Luv2go, I appreciate the info. I will check on both suggestions today.

Phil

[Flagelpater]

FWIW Make sure you are checking the output side of the transfer switch for voltage. If you checked the input side and one of the contacts in the transfer switch did not "make" you could have your problem.

[dapperphil]

nodine,

Well I pulled the fuse and waited for about a minute, put it back in. Didn't work!
I wish it could have been that simple.

Thanks
Phil

[dapperphil]

Flagelpater,

I checked the Transfer switch on both the input from the generator and the output
and both were fine (identical). This is where I learned that I didn't have 240 volts from the generator. Red to White 120v, Black to White 120v, Red to Black 0v.

Thought this was the problem but later found out that this is normal.

Thanks
Phil

[dapperphil]

Quote:

Originally Posted by Luv2go If resetting the EMS does not work, here's another thing to try: Generator operation is sensed by the EMS using a 12V signal from the generator. Looking at page 15 of this manual (I picked one of the 3 or 4 models as I don't know exactly which one you have) there is a +12V Ger Run signal going into J2-2. The voltage on that wire should be 0V with the Gen off, 12V (12-15V, depending on battery state), with the Gen on. There is probably a fuse on this wire between the gen and the EMS, so if the voltage is not there you will have to find it. Stewart

Luv2go,

Took the panel off and compared it to the diagram on page 15 of the manual and mine is different. The diagram does not show a fuse which I have and I do not have J2. The a/c side is like the diagram, the dc side is different. I looked at the manual you sent me which is for Model 800 and I looked at a Model 750 that someone sent me and they are identical.
Mine is a model 760 and is different. I will try to find a 760 manual and go from there.

Thanks
Phil

[RKL]

make sure both generator circuit breakers are closed....located on gen near panel....RKL

[dapperphil]

Well after finally figuring out that the diagram I needed was on page 5 where I could see the fuse and J2. The problem is that I do not have 12v on J2 pin 2. (Blue Wire)

I do not have owners Manual or any wiring diagrams for my 2002 Windsor. Does anyone know where the 12v is supposed to come from. I'm thinking the Gen Run light on the Gen Start switch and if so how it's routed. Any help would be appreciated.

Phil

[Ed_G]

Quote:

Originally Posted by dapperphil Flagelpater, I checked the Transfer switch on both the input from the generator and the output and both were fine (identical). This is where I learned that I didn't have 240 volts from the generator. Red to White 120v, Black to White 120v, Red to Black 0v. Thought this was the problem but later found out that this is normal. Thanks Phil

Am I missing something here? What you are describing is NORMAL for 30Amp service. The Red, and the Black are SAME phase relative to the neutral (white) wire. If you truly had 50A service, they would be opposite phase and you would then measure 240volts instead of zero across the Red and Black. Sounds to me like your generator is only rated / wired for 30A service.

Correct me specifically if I am wrong.... ( I have already had my evening red wine by now )

[dapperphil]

ED_G,
Actually it surprised me too. I thought it should be 240v from Red to Black. After looking into it I found out that both 120v legs are in phase and therefore do not produce 240v. I have a 7.5 quiet deisel and the documentation does not say that it is 240v. The breaker on the generator is 35 amp per leg.

On shore power you get the 240v because they are out of phase.

Phil

[itdave]

OK, I just checked the Intellitec manual and found that on Gen it is not necessary to have 240 volt between the Red and Black. The Intellitec is disabled when the gen run signal (12 volt on J2 Pin 2) is present. The coach is wired to use 120 on each leg there is no need to have 240 volts except to indicate to the Intellitec that you are connected to shore power and it is supplying 50 amps on each leg. If the Intellitec senses 120 volts on each leg but no 12 volts at J2 pin2 it assumes that it is connected to 30 or 20 amp shore power.
I would make sure your generator is providing the Gen Run signal when it is running.

[dapperphil]

itdave,

That is exactly what I found to be true. I do not have 12v at J2 pin 2. I do have 12v coming from the Generator somehow because the light on the Gen switch comes on when the Gen comes on. I believe that is where they get the 12v from. I do not have a wiring diagram so do not know where the Blue Wire that is on J2 pin 2 comes from.

Thank you for your response, I'm getting closer!
Phil