Use a highlighter in your PDF reader (e.g., Xodo or Foxit). On a control schematic, highlight the path of current when START is pressed. Then highlight what happens when STOP is pressed. Then simulate a thermal overload trip.
Mistaking the IEC normally closed symbol (——/\——) for a normally open, leading to incorrect safety circuit analysis. elektrotechnicka schemata a zapojeni v praxi 1 pdf
If the lamp turns ON but motor does NOT run → suspect OL contact miswired: it interrupts lamp path but not K1. Use a highlighter in your PDF reader (e