Webasto thermoconnect installation problems

[hywel1984]

Hi, I've got the thermoconnect tcon2 that I've tried to install on my air top 200 heater. If I connect the heater directly to the thermoconnect it works fine, if my multi controller is connected to the heater that also works fine, but if I connect the multi controller and the tcon2 to the heater at the same time with the Y shaped wiring harness I get a T46 error message and the heater turns off.
Do you have any idea what could be going wrong? I thought it would be a simple installation but it's driving me crazy not being able to get it to work

T46 error is - Excess current/short circuit at switch output Current exceeds 500mA. Check installation. Ensure that the consumer at the switch output is not drawing more than 500mA

Thanks very much for your help

 

[Ricardo T]

@oldiebut goodie is your man!

 

[hywel1984]

@oldiebut goodie is your man!

If he could help that would be brilliant. I've wasted hours of my life trying to figure out why it won't work. The only thing I can think of at the moment is a broken Y shaped wire harness but I bought it new so it shouldn't be broken so apart from paying another £35 for another one to try I don't know how I can diagnose the problem!

 

[oldiebut goodie]

Is your splitter wired up correctly?
Post pics of all the connectors so that I can see the wiring orientation.

 

[Ricardo T]

I’m sure he’ll be along at some point to help you out if he can. He is the heater master!

 

[hywel1984]

Is your splitter wired up correctly?
Post pics of all the connectors so that I can see the wiring orientation.

Thank you for your help, I'll wait until it's light outside to take the photos and I'll upload them on here

 

[hywel1984]

Is your splitter wired up correctly?
Post pics of all the connectors so that I can see the wiring orientation.

Photo 1 is of thermoconnect to Y harness
Photo 2 is Y harness to heater
Photo 3 is Y harness to multi controller
Photo 4 is of the instructions I followed

I can't see how I have gone wrong, as long as the single wire of the Y connector, before the split, is plugged into the thermoconnect unit then the other 2 cables can only fit into the heater and multi controller one way as the connectors are different

Thank you so much for your help!

 

[Absolut5]

 

[hywel1984]

Thank you so much!! That part of the photo wasn't visible on the screen shot I was working from! I'll try it tomorrow and see if it works and let you know how I get on!

Thanks so much for your help!

 

[oldiebut goodie]

The problem is with the black wire - this should not be needed if you are operating with a Multicontrol and ThermoConnect. These operate via W-Bus whereas the black is an analogue switch.
Can you confirm that you do not have a rheostat connected in addition to the Multicontrol and ThermoConnect?

Whilst I was doing half a dozen things at once the solution has been posted! To remove a pin from a male plug use a fine needle to depress the latching tang - see the gold terminal. For the female receptacle depress the little arrow.

 

[oldiebut goodie]

@hywel1984

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Fixed it yet?

 

[hywel1984]

Yes, it's working perfectly. Thank you very much! I disabled outlet 1 in the parallel control in the settings as Absolut5 pointed out and it started working.

Thank you so much everyone for your help!