Scenario Singleplayer [ET22][Cargo] Coal Mine operations

[jmluengor]

I have started this scenario many times and only managed to cover a few kilometres, because the ET22 always loses traction when trying to climb a ramp that ends in two viaducts. That's as far as I go. Suddenly, the ammeter drops to 0 and the locomotive starts to slide backwards. Has the same happened to you? Have you finished this activity? Thank you for your comments.

[GoppelPL]

Did you connect the pantograph back to the main air system, and not leave it with the small compressor system as when powering up the loco? 

[jmluengor]

Hummm... I suspect not. As the activity begins with the locomotive running and stopped at a traffic light, I understand that the locomotive is ready to be driven. I'm going to put your recommendation into action. Thank you for your help.