Motor have winding star and delta and scatch for them using a diagram. I also scetch them motor control schematic star delta and direct on line.
Panel troubleshoot using multimeter
Using voltage AC or DC and buzzer test on multimeter. I also told them how to use multimeter correctly
Air conditiong troubleshooting with clamp meter and check amp and pressure with presure gauge
I told them how to check the leakage Moins