I have a Bachmann class 24 factory fitted with sound. I bought it new last September and I understand it is fitted with a Zimo MX644 decoder.
Because I had to rewheel it I haven't used it much until recently and when I have it's worked really well. However, I've now been experimanting with some of the sounds on offer This has resulted in some anomalies. For example, pressing F8 and then F1 is supposed to produce a "cold start". Indeed it does, and it sounds good, but unfortunately the loco then refuses to move, with or without sound, and the only solution is to unplug my Power Cab and start again. Once that's been done, press F1 and all is well. Then there are F5 (on light engine, off heavy train) and F6 (coasting). Try to start off with F5 engaged and the result is the same as F8/F1 - no movement, reboot needed. Engage F5 or F6 while the loco is running and it will continue to run, but it won't stop, either by pressing F2 (active brake) or the red button. Instead the loco has to be grabbed and a reboot is again necessary to getthings working again. All the other F buttons seem to work as intended and lighting works as intended.
I don't imagine I'll use F5, F6 or F8 much, but I'm concerned that they're not working and that there may be other problems. Has anyone any ideas as to what might be happening and if the problems can be resolved?