wilwahabri Posted June 27, 2021 Share Posted June 27, 2021 I have recently fitted a Lenz Standard+ V2 decoder to a Fleischmann 4430 diesel railcar. I have a number of locos fitted with this decoder, all have worked with no issue, however originally I did not connect the lights, which have been replaced with LEDs and resistors (again something I have done a number of times before). With the lights disconnected the train worked fine, however after connecting the lights the loco will not run and the forward running lights flash on and off at about 1 second intervals. This looks like an error code of some sort, but the manual does not list anything. The auxiliary output is still working switching the interior lights off and on under control of the DCC system. Current drawn is minimal > 50mA Appreciate any suggestions as to what may be wrong and how to fix the problem Link to post Share on other sites More sharing options...
TWG Posted June 27, 2021 Share Posted June 27, 2021 Flashing lights on a loco with a Lenz decoder indicate a short circuit (this also happens with Kuehn decoders and possibly others); the safety cutout has switched the decoder off to avoid damage. It is odd that this is not mentioned in the instructions. Since everything else works when the lights are disconnected, it seems likely that when you replaced the bulbs with LEDs you created a short circuit somewhere. So I suggest that you get out your multimeter and check your alterations. 1 Link to post Share on other sites More sharing options...
RMweb Gold beejack Posted June 27, 2021 RMweb Gold Share Posted June 27, 2021 Manual for V2 says 5.1 Capacity and protection equipment The decoder is protected against overloading, short circuits and overheating. In case of a fault, the corresponding bit is set in CV30 which will state the type of fault which has occured. This bit can be deleted via programming. CV Value / Bit Meaning Ex-works setting 30 Bit Fault display 0 (dec) 1 (0) 1 Light short-circuit 0 2 (1) 1 Overheating 0 3 (2) 1 Motor-/Track short-circuit 0 Link to post Share on other sites More sharing options...
wilwahabri Posted June 28, 2021 Author Share Posted June 28, 2021 Yep lack of insulation! Always check what you last touched! valuable words of advice. the motor brush gear (it is a horizontal motor with the brushes mounted on a vertical faceplate ) touched the live feed for the lights when it went round bends, which resulted in the train accelerating on bends when going forwards and shorting out when going around bends backwards! fixed! Link to post Share on other sites More sharing options...
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