If the powder injector is not working properly, there could be several potential issues to check. Here are some steps you can take to troubleshoot the problem:

1. Check the powder supply: Ensure that the powder container is properly filled and that the powder is notumping or clogging the injector. Also, check if the powder is the correct type and consistency for the application.

2. Inspect the injector components: Carefully inspect the injector and its components for any signs of damage or wear. Check for any loose connections, cracks, or blockages in the powder feed hose, injector nozzle, or electrode.

3. Clean the injector: Powder build-up or residue inside the can affect its performance. Disassemble the injector and clean all parts thoroughly using compressed air or an appropriate cleaning. Be sure to follow the manufacturer's instructions for the specific model of the injector.

4. Check the voltage and grounding: Improper voltage or inadequate grounding can cause issues with the powder injector. Verify that the power supply is providing the correct voltage, and ensure that the injector is properly grounded.

5. Review the: Confirm that the powder injector settings, such as voltage, airflow, and powder flow rate, are correctly adjusted for the desired coating application. Refer to the equipment manual or consult with the manufacturer for recommended settings.

6. Test with different powder: possible, try using a different batch or type of powder see if the issue persists. This will help determine if the problem lies with the powder itself.

If you have followed these steps and the problem still persists, it may be necessary to contact a professional technician or the manufacturer for further assistance or to arrange for a repair or replacement of the powder injector