Rev L issues where TIU does not recognizing engines

Mike,

Try pressing the READ button to see if the remote is communicating with the TIU

Joe,

I am able to vary the voltage on the variable channels with the remote.

 I had this issue and to make it short, I found that I had the incoming red and black wires reversed. The engine would still come up silent, it would not add.

Joe,

I had this issue and to make it short, I found that I had the incoming red and black wires reversed. The engine would still come up silent, it would not add.

I think that you may be "misremembering" the situation.

 

If the wires from the transformer to the TIU are reversed, everything would still work fine. If the wires from the TIU to the tracks were reversed, the engines would come on with lights and sounds, in conventional mode.

 I should add a disclaimer. My memory doesn't work well!

It may have been on my G scale with DC power then??

Sorry for the interruption Mike! Now back to your regular helpful guys!

Hump Yard Mike:

 

I use the MTH DCS system.

 

Whenever I add a new piece of equipment such as a new TIU I always start with my system that works correctly.

 

For example: I have 2 TIUs and one remote.  When I purchased a second TIU I set up the original system with a known good engine.  When I was satisfied that everything worked together then I substituted the new TIU and started it up to test it as well.  I do the same thing with New engines.

 

If you suspect a remote is Not communicating wirelessly then connect the remote and the TIU using a cable and try again. 

 

 

Pro Hobby/ Kansas City

Joe, you actually aren't 'misremembering' the situation, what you have described is exactly what happens in a DC environment when input TIU polarity is reverse and one that the guys that run strictly O gauge don't often know or think about.  Because of the difference in behavior between AC and DC power it may not be relevant in this case but you are correct on what you recall.