| Bad symtoms | Possible Cause | Solution |
| 1.With low power, powder coating is not easy to coated; | 1. High voltage power supply shortage; | 1.Check the circuit |
| 2.Grouding is bad; | 2.Remove clutter grouding line |
| 3.Compressed air volume is too big, the powder to blow fell &blows away; | 3.Spray appropriate isolation, reduct air convection; |
| 4.Powder particle size is too thin; | 4.Add new powder coating, reduce the recovery powder consumption. |
| 5.The air temperature is too high; | 5.Powder particles with air water branch of low power, control temperature of spray area; |
| 2. Charge repulsion powder repboud from the working surface; | 1.The voltage is too high; | 1. Lower voltage and air volume; |
| 2.Spray gun from the work location is too close; | 2. Extend the spray gun and artifacts; |
| 3. Grouding is bad; | 3.Remove clutter grouding line; |
| 4.Powder particle size is too thin, not esay to attach to the workpiece surface; | 4.Add new powder coating, reduce the recovery powder consumption; |
| 3. Corner not easy spraying penetration is bad; | 1. The powder amount is too small; | 1. Lower voltage and air volume, increasing the amount of powder; |
| 2. Grouding is bad; | 2. Adjust the spray gun position; |
| 3. The voltage is too high; | 3. Choose small backboard, proper nozzle; |
| 4. Spray gun position is not good; | 4.If the corner is more and deeper, then consider friction gun equipment; |
| 5. Powder spraying range is too wide; |
| 4.Powder spraying uneven | 1. Air pressure is insufficient; | 1. Cleaning pipeline, spray gun and flowmeter; |
| 2.Line fault block; | 2.Check the air supply, Exclude water vapor in powder agglomeration; |
| 3.Block in the spray gun; | 3.If powder agglomeration, to screen or change new powder coating; |
