| No. |
Symptoms of the problem |
Cause of the problem |
Troubleshooting method |
| 1 |
The power indicator light does not light up after turning on the “Power Switch” of the plasma cutting machine main unit. |
The “Power Indicator Light” is broken. |
To replace |
| The 2A fuse is broken. |
To replace |
| No 380V three-phase voltage input. |
To repair |
| Input power phase loss. |
Use a multimeter to check the three-phase power supply. |
| The power switch is broken. |
To replace |
| The control board or main unit is broken. |
To repair |
| two |
After connecting the input power, the fan of the plasma cutting machine does not rotate, but the power indicator light turns on. |
Phase loss in three-phase input power. |
Use a multimeter to check the three-phase power supply. |
| The fan blade is stuck by a foreign object. |
Remove foreign objects. |
| The fan power plug is loose. |
Reconnect it. |
| The fan cable is broken. |
To repair |
| The fan is damaged. |
Repair or replace. |
| 3 |
After connecting the input power, the power indicator light is on and the fan is normal, but there is no air flow ejected after turning on the “Test Air” switch. |
No compressed air intake. |
Inspect and repair the air source and supply piping. |
| The air filter pressure reducing valve fails, the pressure gauge indicates 0 and the “insufficient air pressure” indicator light comes on. |
Adjust the pressure reducing valve pressure or replace the pressure reducing valve. |
| The “Test Air” switch is broken. |
To replace |
| The electromagnetic valve of the main unit is broken. |
Repair or replace. |
| The gas supply pipeline is leaking or broken. |
Maintenance |
| 4 |
When the “Test Air” switch on the main panel is turned on, airflow is ejected, but the machine does not respond when the torch switch is pressed. |
The plasma torch switch is broken or the connecting line is broken. |
Repair or replace. |
| The “Cut” switch on the plasma cutting machine panel is broken. |
Repair or replace. |
| The control board of the cutting machine main unit is broken. |
Repair or replace. |
| The host control transformer or related circuits and components are damaged. |
Maintenance |
| The cutting machine is in a protection state due to temperature or other reasons. |
Wait for the temperature to normalize. |
| The water circuit is not working properly, causing low water pressure protection. |
Check the water circuit and water pressure valve. |
| 5 |
When the plasma torch switch is pressed, there is airflow from the nozzle, but neither “High Gear” nor “Low Gear” can cut off. |
Phase loss in input power. |
Maintenance |
| The air pressure is less than 0.45Mpa. |
Adjust the pressure reducing valve pressure. |
| The inlet airflow is very small. |
Ensure 0.3 m 3 /min. |
| Poor contact between the cutting ground wire and the workpiece. |
Replace or replace. |
| The electrode tip or other parts of the torch are damaged. |
Replace with new parts. |
| The cutting method is incorrect. |
Place the nozzle and workpiece correctly. |
| The torch cable of the plasma cutting machine is broken. |
Replace or reconnect correctly. |
| The gap in the “spark arrestor” in the main unit is too large or short-circuited. |
Ensure a gap of approximately 0.5 mm. |
| Some components of the main unit are damaged, such as: pressure controller, etc. |
Repair or replace. |
| The main unit control board is damaged. |
Repair or replace. |
| The plasma cutting machine torch is damaged. |
To replace |
| 6 |
Contact cutting is possible, but non-contact cutting is not. No spark is ejected from the nozzle during the non-transferred arc test. |
The 15A fuse core is broken. |
To replace |
| The air pressure in the pressure reducing valve is too high. |
Adjust the pressure. |
| Some torch parts are damaged. |
To replace |
| The torch is wet and the moisture content in the compressed air is very high. |
Dry and add a water filter device. |
| The arc ignition line is broken. |
To replace |
| The torch is damaged. |
To replace |
| 7 |
Only one gear can work in high and low gears. |
The coarse cut selection switch is broken or the wire is broken. |
To replace |
| One of the AC contactors is damaged. |
To replace |
| The main rectifier is broken or the related wire is broken. |
Repair or replace. |
| 8 |
The plasma arc is unstable when the plasma cutting machine is working. |
Air pressure is too low or too high. |
Adjust |
| The torch electrode or nozzle is burned out. |
To replace |
| Input AC voltage is too low. |
Adjust the input voltage. |
| Poor contact between the cutting ground wire and the workpiece. |
Replace or replace. |
| The cutting movement speed is too slow. |
Adjust the cutting speed. |
| The spark arrester cannot automatically break the arc. |
Discharge normally for 0.5s and then repair. |
| Related components in the main unit are not working properly. |
Maintenance |
| 9 |
The cutting thickness does not reach the nominal index. |
Low input voltage. |
Adjust the input voltage. |
| The diameter of the input power line is too small, causing a lot of line loss. |
Increase input capacity. |
| The inlet compressed air pressure is too low or too high. |
Adjust air pressure. |
| The compressed air flow is very small. |
Ensure compressed air flow. |
| Gear selected for cutting thickness is inappropriate. |
Shift into high gear. |
| The cutting speed is very fast. |
Decrease the cutting speed. |
| The workpiece material does not match. |
Adjust the parameters. |
| The nozzle hole was burned. |
Replace the nozzle. |
| The electrode is burned out. |
To replace |
| The nozzle model is incorrect. |
Change to the correct nozzle model. |
| There is a gas leak in the air duct. |
Repair or replace. |
| 10 |
The cut is distorted. |
The electrode nozzle has been damaged. |
To replace |
| The installation position of the electrode nozzle is not concentric. |
Reinstall correctly. |
| The cutting speed is very fast. |
Decrease the cutting speed. |
| The nozzle axis is not perpendicular to the part surface. |
Adjust to resolve. |
| 11 |
The cut is too wide, resulting in poor cutting quality. |
The cutting speed is very slow. |
Adjust the speed. |
| The electrode nozzle is burned out. |
To replace |
| The cutting material and thickness do not match the selected dispensing mechanism. |
Choose the correct equipment. |
| The nozzle model is incorrect. |
Replace the nozzle with the correct model. |
| 12 |
The torch of the plasma cutting machine is burnt out. |
The metal pressure cap is not tight. |
Regularly inspect the plasma cutting machine's torch section connections to ensure that all parts work well together. |
| Torch lead connection is loose and leaking. |
|
| Poor insulation at the torch joint. |
|
| The ceramic protective cover on the torch is damaged and cannot be replaced. |
|
| Too much humidity in the compressed air. |
|
| The torch misfires when the sectional cutting machine is cutting in parallel. |
|
| The electrode was not replaced in time after it was burned. |
|
| The water circuit is not normal when the water-cooled torch is working and the interface is leaking. |
|
| 13 |
The rectifier diode often burns out. |
The reverse breakdown voltage of the newly replaced diode is very low. |
Reverse voltage resistance ≥1600V. |
| Some iron capacitors on the protection capacitor board are damaged. |
To replace |
| The main rectifier transformer is damaged. |
Repair or replace. |
| The torch is damaged. |
To replace |
