Chrissaf Posted March 26, 2020 Share Posted March 26, 2020 I have recently gone back to my layout. When I turn it on the loco runs backwards, when I turned the loco around it still runs backwards. My layout is DCC and used to work ok previously. If I turn the power off and then back on again the loco runs backwards with no controller input. What have I done wrong? Link to comment Share on other sites More sharing options...
Chrissaf Posted March 26, 2020 Share Posted March 26, 2020 What DCC Controller are you using?What DCC Decoder is fitted to this loco?.TIP: As a newbie poster on the forum, just be aware that the 'Blue Button with the White Arrow' is not a 'Reply to this post' button. If you want to reply to any of the posts, scroll down and write your reply in the reply text box at the bottom of the page and click the Green 'Reply' button..See also – further TIPs on how to get the best user experience from this forum.https://www.hornby.com/uk-en/forum/tips-on-using-the-forum/. Link to comment Share on other sites More sharing options...
jane1707819582 Posted March 26, 2020 Share Posted March 26, 2020 Hello Peter. To answer your last question .Probably nothing .So can you reset the decoder ? CV 8 to a value of eight covers most decoders.after that swap the decoder with another loco see what happens . Link to comment Share on other sites More sharing options...
96RAF Posted March 26, 2020 Share Posted March 26, 2020 Likely the decoder is set for DC running in CV29.Have you inadvertantly selected loco zero and set it off backwards. If so select it again and zero the speed. Link to comment Share on other sites More sharing options...
Rog RJ Posted March 26, 2020 Share Posted March 26, 2020 Although the op says the layout previously worked OK, wasn't there a problem with early TTS decoders only running in one direction? Link to comment Share on other sites More sharing options...
Fishmanoz Posted March 26, 2020 Share Posted March 26, 2020 Obviously an element of DC Runaway in this but I have had a decoder fail in that first intermittantly, then all the time, the loco would not run forward, backwards was fine. Replaced under warranty from the Mixed Freight set (so Hornby 4-pin). Link to comment Share on other sites More sharing options...
ColinB Posted March 29, 2020 Share Posted March 29, 2020 I have had the same issue with two modules, usually an issue with one side of the H bridge stage going wrong. On both occasions got the module changed. On one of my locos it happened when the track voltage accidently touched one of the motor feeds, so check the loco wheels aren't accidentally touching one of the bits of uninsulated wire that goes to the motor, or a slight short on the 8 pin DCC socket in the loco, between pins 1 and 8 or 4 and 5. I forgot before you do anything, do as jane2 said, reset the module, this happened on a LaisDCC module to me and resetting it, cured it. Link to comment Share on other sites More sharing options...
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