What to do if Siemens FC18 has no power supply indication?
- JJasmine GreenAug 22, 2025
If your Siemens Controller shows no power supply indication, first ensure that the main power and battery are properly connected. Check the power wiring and also verify that the power lines inside the controller are firmly connected. If the issue persists, the power supply itself might be faulty and need replacement. Properly connect power wiring and if it doesn't help, change power supply.