Eberspacher d2 won't work

[stevie43_uk]

Hi All,

Just wondered if there were any Eber experts out there that can help.

My Airtronic d2 won't start - when it gets a signal to fire up from the yellow wire it will click only once - continued attempts to fire don't give anymore clicking. when you take power off the main unit it clicks again - they when attempting to fire (once rebooted so to speak), it will click once again.
Could the Ecu be in lock out ?

Thanks in advance

Steve

[Oldiebut goodie]

On start up the indicator light illuminates and the following
sequences take place:
• Control unit does a systems check of the glow pin, flame
sensor/temperature sensor, fuel metering pump and control
unit.
• Glow pin is energized and starts preheating the combustion
chamber.
• Blower starts slowly and begins to accelerate.
• After a delay (approx. 20 seconds) the fuel pump delivers
fuel.
• Ignition will take place as the fuel/air mixture begins to
burn.
• Blower speed and fuel delivery are slowly increased.
• Once flame sensor has detected a flame the glow pin will
switch off, after approx. 15 secs.
• After another 120 secs., heater will have reached maximum
power.

If you are getting nothing after switch on it will mean it has failed the component test - first in list. So check each of them against the values in the manual.Pages 25 and 26 of the manual. Including voltage at the heater

[stevie43_uk]

Hi

Thanks for yr reply - only just bought it used off eBay and trying to get it to fire up -

Connected +ve to term 1 and Earth to term 10 and attached trigger yellow term 4 but nothing
Do I have to leave it a while ?

Ta
Steve

[Oldiebut goodie]

In that case it would be better if you put up some pics of what components you have, the connections that you have made and what controller you are using.

[stevie43_uk]

Hi

Ive got the thermostat rotary knob controller
Connected Red +ve to 5, Yellow to 6 and -ve Brown to 3 on rotary controller

On the Eber I've connected Red + ve to 1, yellow to 4 and -ve brown to 10

I've done pics but they are too big.... Will try in a bit

Thanks
Steve

[Oldiebut goodie]

If all the components are within the specs from the manual you could try earthing the brown and white that goes from 6 to 1 on the rheostat (it isn't a thermostat). That has solved one problem like that for me in the past. Have you connected the brown/white and the grey/red?
It is no use chasing around too much until you have made the first checks on the components.

[stevie43_uk]

Hi

Will try grounding those wires - with everything connected I assume I'm supposed to have light illuminated in the middle of the rotary switch but it isn't ??

Yes the brown/White is connected from term 1 on the controller to term 6 on the heater and red / green is connected from term 2 on controller to term 7 on heater

Help so far is greatly appreciated - just hope I don't need a new Ecu !,

Ta
Steve

[stevie43_uk]

Hi,

I'm confused now ??

I did as you said and grounded the brown/white wire and connected all the others as per our previous correspondence and now I get a green light illuminated on the rotary rheostat when it is in the clicked off position - when I turn it clockwise it clicks and the green light goes off. If I turn it one more click it allows me to turn the controller knob all the way around but the light still stays off with nothing happening at the heater ?

Surely the green light should be on -

Thanks for any help in anticipation

Steve

[Oldiebut goodie]

Right - ignore earthing now and do the first checks.

[stevie43_uk]

Hi,

Sorry to be a pain but I've got the technical and workshop manuals but can't see procedures on page 25 and 26 - you wouldn't have the list would you - cheers

Steve

[Oldiebut goodie]

pm me your email address and I'll send you the manual.
Also the link to the ebay listing and I can take a look at what is there.

[stevie43_uk]

Weird !

With the Earth disconnected from the brown / white wire (and the rest of the wiring as before) the green lamp is now still illuminated when in the off position.

Checked 12v is OK to heater on +ve and -ve but no voltage from yellow from controller when either off ( with green light on ) or on (with green light off )

Mystified !

[stevie43_uk]

Pm sent

[stevie43_uk]

Hi,

Partial success !
When I short out the yellow wire it activates the fan after a few seconds delay.
This runs and speeds up but the diesel pump doesn't kick in - checked if there is volts getting to the pump and nothing seems to getting to the pump after 20 secs or so of running - pump is connected to earth and red / green wire.
Pump is ok and pulses when tested with 12 v separately

Any suggestions

Cheers

Steve

[Oldiebut goodie]

Follow the check list - the manual describes exactly that scenario and timing. No. 2 on the list.