Eberspacher Wiring? Easystart Timer No Signal Error

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geegrrl

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I got the Eberspacher Easystart Timer in order to replace the Mini Timer. The Mini has no fault diagnosis or reset capabilities. I was hoping just to slot the Easystart in place of the Mini. The problem is the Mini Timer only seems to utilize 3 wires - red, yellow and brown. However I can follow the wiring loom down from the Mini-Timer and see there is an unconnected blue and white wire (for diagnostics). So that gives a total of 4 wires. But the Easystart Timer has 8 wires (red, yellow, brown, grey, violet, blue&white, grey&black, brown&yellow, white&red, brown&white). I connected all the wires I could (red, yellow, brown, blue&white). I replaced the 10A main fuse and the unit light comes on and says "INIT". So far so good. Then I get an error telling me there is "No Signal". The manual tells me this means there is "No communication". It tellsme to check the fuse, voltage supply or the wiring. The 10A blade fuse looks good to my eye. The voltage supply showed a proper 12 something volts. So what is wrong with the wiring? I can see no other wires other than the red, yellow, brown, blue&white which is available to the current Mini Timer. So I'm scratchin' my head. Any ideas? Attached are some pix.
 

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Captainboo, I'm not sure where to connect the Grey/Red wires and Brown/White wires. The only place I can see extra wires other than the red, yellow, brown, blue&white set which go to the Mini Timer, is at the Power Loom. Are you saying the Easystart Timer's wires should be tapped in at the Power Loom?
 
The manual for the easystart explains the two wires joined together and insulated so presumably at the power loom.

Page 18 of the manual and I assume it is an Airtronic and not a Hydronic.

The yellow does not appear to be connected as the switching appears to be through the diagnostic wire.
 
Last edited:
captainboo said:
Page 18 of the manual and I assume it is an Airtronic and not a Hydronic.
Click to expand...

Hi Captainboo,

My heater is the Hydronic and the diagram for it on page 17 shows is no grey/red to brown/white on the heater.

It looks like it really should just be a simple matter of connecting the red, brown and bluewhite diagnostic wires. I've done that but still got the "no signal" error. This is quite bizarre... is there something I missed?
 
geegrrl said:
Hi Captainboo,

It looks like it really should just be a simple matter of connecting the red, brown and bluewhite diagnostic wires. I've done that but still got the "no signal" error. This is quite bizarre... is there something I missed?
Click to expand...

You may want to try connecting a +12v feed to pin 2 (grey/black) admittidley this connection is usually connected to the ignition so as to turn off the heater when the engine is not running, but it may well energise something and it is shown in the schematics for the controller as connected.
 
Hi geegrrl,

I hope you get this post as I have just brought the Easystart select controller to replace the mini timer and are having the exactly the same problem with wiring i.e the no signal error. I have the older style hydronic D5WSC with the same wiring loom as your heater. Did you get it fixed in the end.

Please let me know as I am at my wits end!!!!!
 
svkairos said:
Hi geegrrl,

I hope you get this post as I have just brought the Easystart select controller to replace the mini timer and are having the exactly the same problem with wiring i.e the no signal error. I have the older style hydronic D5WSC with the same wiring loom as your heater. Did you get it fixed in the end.

Please let me know as I am at my wits end!!!!!
Click to expand...

Geegrrl or Svkairos - we are having the exact same problem - did either of you get an answer to this problem?

Hope so - can you please post below if you did. Many thanks
 
geegrrl said:
I got the Eberspacher Easystart Timer in order to replace the Mini Timer. The Mini has no fault diagnosis or reset capabilities. I was hoping just to slot the Easystart in place of the Mini. The problem is the Mini Timer only seems to utilize 3 wires - red, yellow and brown. However I can follow the wiring loom down from the Mini-Timer and see there is an unconnected blue and white wire (for diagnostics). So that gives a total of 4 wires. But the Easystart Timer has 8 wires (red, yellow, brown, grey, violet, blue&white, grey&black, brown&yellow, white&red, brown&white). I connected all the wires I could (red, yellow, brown, blue&white). I replaced the 10A main fuse and the unit light comes on and says "INIT". So far so good. Then I get an error telling me there is "No Signal". The manual tells me this means there is "No communication". It tellsme to check the fuse, voltage supply or the wiring. The 10A blade fuse looks good to my eye. The voltage supply showed a proper 12 something volts. So what is wrong with the wiring? I can see no other wires other than the red, yellow, brown, blue&white which is available to the current Mini Timer. So I'm scratchin' my head. Any ideas? Attached are some pix.
Click to expand...
This is 2023 May and I'm having the same problems. I see that there is no solutions posted ! When I find the answer I will post.
 
geegrrl said:
I got the Eberspacher Easystart Timer in order to replace the Mini Timer. The Mini has no fault diagnosis or reset capabilities. I was hoping just to slot the Easystart in place of the Mini. The problem is the Mini Timer only seems to utilize 3 wires - red, yellow and brown. However I can follow the wiring loom down from the Mini-Timer and see there is an unconnected blue and white wire (for diagnostics). So that gives a total of 4 wires. But the Easystart Timer has 8 wires (red, yellow, brown, grey, violet, blue&white, grey&black, brown&yellow, white&red, brown&white). I connected all the wires I could (red, yellow, brown, blue&white). I replaced the 10A main fuse and the unit light comes on and says "INIT". So far so good. Then I get an error telling me there is "No Signal". The manual tells me this means there is "No communication". It tellsme to check the fuse, voltage supply or the wiring. The 10A blade fuse looks good to my eye. The voltage supply showed a proper 12 something volts. So what is wrong with the wiring? I can see no other wires other than the red, yellow, brown, blue&white which is available to the current Mini Timer. So I'm scratchin' my head. Any ideas? Attached are some pix.
Click to expand...
You should talk to these people. They are very helpful. Eberspacher

Also check out their web page for wiring diagrams.
 
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