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Hi,

I've got the OTGW up and running, but it seems to have a problem.
On my thermostat (celcia 20) I read "fout 203"

In the OTmonitor I get: T800500CB read data application-specific flags: 00000000 203

Could someone point my in the right direction?

Thanks,
Jasper

You're only showing one message that's actually a request for information from the thermostat to the boiler. It's a bit hard to say anything useful based on such little information. But if that's all you get, there's probably a problem communicating with the boiler. In that case I suggest you follow the troubleshooting instructions.

I understand the info is minimal, but thats what the monitor shows, only this error.
I believe there is a mistake with soldering.
I'll go through the components and troubleshooting guide tonight. Any findings i'll share asap!

Thanks for replying!
/Jasper

jappiedepappie wrote:I understand the info is minimal, but thats what the monitor shows, only this error.

It's not an error. It's a perfectly fine message from the thermostat.

Problem solved! I mixed the two diodes (15v and 4v3). Soldered them in the correct order and everything works.
I get full info from Thermostat and Boiler now and I'm able to set different parameters.

Thanks Schelte for replying!

Fout 203 is actually the error that the Celia shows when it gets no response from the boiler.
Seen it before, after thunder killed both my boiler's as the Celia's opentherm interface
Replacing one of both did not solve the problem, so I eventually exchanged both the boiler main board and the thermostat.

jappiedepappie wrote:Problem solved!

Great. Thanks for reporting back what the problem was.