Help with Eberspacher heater wiring

[Jabamusic]

I know not another one, but please your assistance would be gratefully received.

After 3 years in storage, I now have a new (to me) boat to install my old D1LC compact into. With winter on its way, it will be a great asset I'm sure.

Anyway, whilst I thought I'd removed and stored it nicely, unfortunately the controller (a 401.00 191) is damaged beyond repair. I have got another, but the wiring is quite different.
The 401 has 6 wires coming from it, whilst the new one (a 7 day, 1 hour timer I believe) only has 4 wires coming from it.
The 701 has RED, BROWN, YELLOW, RED/GREY.

The 401 has RED, BROWN, GREY, YELLOW, BLUE, BROWN/WHITE.

To complicate matters the old controller was wired with an external thermostat, so the Brown/White wire and the Grey wired are spliced out to a choc block- the Grey from the ECU is spliced to the the blue of the Thermostat and the Brown/white to the brown of the thermostat. The Brown/white wire is then led fed back into the connector.

My question is what do I connect to what?
I assume
Blue = diagnostics
Red + ve
Yellow = Signal

I have attached a photo or 2 to help out. The first two are the switch loom heading to the ECU, the last 2 are from the controller into the switch loom.

I am happy to lose the thermostat if necessary to simplify things, although if it can stay all the better.

Very much appreciate any help, suggestions, advice.

Jaba

 

[cliff]

If you can be bothered you could down load the manuals for the D1LC and look at the wiring diagrams for the various units / controllers - might take a little effort but i am sure you would be able to determine which wires go where when changing type of controller.

Let me Google that for you - wiring diagrams about ½ way through the manual.

If you cannot find the solution there there are several other manuals on teh ESPAr web site dealing with the various timers / controllers - maybe something in those.

 

[Jabamusic]

I have certainly been bothered to do that and have enough print-outs to wallpaper the front sitting room

I was hoping for some informed assistance as I am not confident and the wiring diagrams I have don;t offer up the same scenario i have.
Jaba

 

[Gordon_Rival]

I sell quite a few of these and they are very straight forward to wire up. I would ditch the external theromostat and just wire :
yellow - yellow
red to red
brown to blue
grey.red to grey

If its wrong you shouln't blow up the ecu
G.

 

[Jabamusic]

I sell quite a few of these and they are very straight forward to wire up. I would ditch the external theromostat and just wire :
yellow - yellow
red to red
brown to blue
grey.red to grey

If its wrong you shouln't blow up the ecu
G.

The first part offers some re-assurance, I'm not so certain about the last bit !!

 

[pcatterall]

Dont understand the photos and away from my diagrams. Red battery+ Brown battery neg, yellow trigger wire when your timer puts 12v + to the yellow it will start the heater but there will be nothing to set the heaters thermostat. I thought it was brown /white but not certain.
Have you tried espar.com for there down loads. If yoy have problems contact me when I get home ( Saturday)

 

[Heckler]

I know not another one, but please your assistance would be gratefully received.

After 3 years in storage, I now have a new (to me) boat to install my old D1LC compact into. With winter on its way, it will be a great asset I'm sure.

Anyway, whilst I thought I'd removed and stored it nicely, unfortunately the controller (a 401.00 191) is damaged beyond repair. I have got another, but the wiring is quite different.
The 401 has 6 wires coming from it, whilst the new one (a 7 day, 1 hour timer I believe) only has 4 wires coming from it.
The 701 has RED, BROWN, YELLOW, RED/GREY.

The 401 has RED, BROWN, GREY, YELLOW, BLUE, BROWN/WHITE.

To complicate matters the old controller was wired with an external thermostat, so the Brown/White wire and the Grey wired are spliced out to a choc block- the Grey from the ECU is spliced to the the blue of the Thermostat and the Brown/white to the brown of the thermostat. The Brown/white wire is then led fed back into the connector.

My question is what do I connect to what?
I assume
Blue = diagnostics
Red + ve
Yellow = Signal

I have attached a photo or 2 to help out. The first two are the switch loom heading to the ECU, the last 2 are from the controller into the switch loom.

I am happy to lose the thermostat if necessary to simplify things, although if it can stay all the better.

Very much appreciate any help, suggestions, advice.

Jaba

bottom line, red is positive, brown is negative. yellow is the switch, so red to yellow it fires up, blue is diagnostic.
all the thermostats and controllers have red and brown to power them and when it calls for power it energises one which needs to go to the yellow on the unit.
Stu

 

[Jabamusic]

Yes I have downloaded diagrams - struggling to comprehend them in reference to what I have.

Jaba

 

[Jabamusic]

bottom line, red is positive, brown is negative. yellow is the switch, so red to yellow it fires up, blue is diagnostic.
all the thermostats and controllers have red and brown to power them and when it calls for power it energises one which needs to go to the yellow on the unit.
Stu

So, if I have this right:

I can ignore Blue and I can ignore Black.

I connect Red from the controller to red from the switch cable
I connect Yellow to yellow
I connect brown to brown

That leaves me Red/Grey from the controller with only grey remaining from the switch cable.
These I connect together?

I know - a real numpty, but better to be honest with ones ignorance than pretend you know what you're talking about !

Jaba



From Controller the 4 wires only

 

[Heckler]

So, if I have this right:

I can ignore Blue and I can ignore Black.

I connect Red from the controller to red from the switch cable
I connect Yellow to yellow
I connect brown to brown

That leaves me Red/Grey from the controller with only grey remaining from the switch cable.
These I connect together?

I know - a real numpty, but better to be honest with ones ignorance than pretend you know what you're talking about !

Jaba



From Controller the 4 wires only

I forget what the red and grey is, perhaps the thermostat signal?
Stu

 

[Jabamusic]

I forget what the red and grey is, perhaps the thermostat signal?
Stu

Not sure either. From the photos you can see that the grey is spliced out to the blue of the external 2 core cable (blue and brown) from the thermostat and the brown from the thermostat returns to the loom via the brown/white which connects to the brown wire to the controller.
It seems to make sense that it is the grey/red that through-connects to the grey to the controller.
Jaba