Causes: 

 
1. The double protective lenses are damaged.
 
2. The red light center point is offset and hits the inner wall of the gun body.

3. The focusing lens is damaged.

 
4. The gas has not passed through the dryer's oil-water separation.

5. The light transmittance of the protective lens is insufficient or the coating is not resistant to high temperatures.
 
Solutions:
1. Check if there are any stains on the lenses under the light. If so, the protective lenses need to be replaced.

2. If the red light is offset left or right, the system parameters have a center offset function for fine adjustment; if it is offset up or down, the motor needs to be adjusted.
 

3. Replace the focusing lens.

4. The compressed air needs to be equipped with a dryer and oil-water separator to ensure that the blown gas contains no water or oil. Argon and nitrogen do not need to go through the dryer and oil-water separator.

5. Replace with high-temperature resistant protective lenses with good light transmittance.

Causes:
 

1. Interference from argon arc welding signals. 

2. System failure.
 
3. The temperature monitoring board is burned out.

4. The screen signal line and the temperature control signal line were cross-connected incorrectly during wiring.

5. Poor contact of the signal lines of the control box or temperature control board.

6. No grounding wire.

 Solutions:
 
1.Do not use laser welding in the same location as the argon arc welding machine. The working distance between the laser welding machine and the argon arc welding machine should be 5-10 meters apart.

 
2. Measure the voltage of the CN3 terminal. The normal voltage of pins 1-4 is about 5V; if not, the main board is burned out. The normal voltage of pins 2-4 is 0-0.18V; if not, it indicates that the signal line of this port is open or the main board is burned out. The normal voltage of pins 3-4 is 2.5V; if not, the signal line is open or the temperature control board is burned out.

3. Standardize the grounding wire to ensure that the measured voltage between the internal ground wire and neutral wire of the machine is 0V.
 
4. Open the cover of the gun head temperature monitoring board to check for obvious signs of burning or blackening.

Causes:
 
1. The 15V switching power supply is not powered on simultaneously with the 24V switching power supply.

2. The ±15V power supply connected to the control box is reversely connected.
 
3. The 15V switching power supply is burned out.

4. The 9-pin plug on the gun head is not properly connected, or the signal wire in the middle is disconnected.

 
5. The motor or control box is burned out. 

 Solutions: 

1. The CN5 port on the control box must receive both 24V and ±15V power supplies at the same time. 

2. A total of 3 wires need to be connected for ±15V to the control box, which are +15V, COM, and -15V, and these 3 wires must not be connected incorrectly.

3. Measure whether there is voltage at the input and output ports of the switching power supply. If there is input but no output, it indicates that the power supply is burned out and needs to be replaced.

4. Correct wiring is crucial to ensure the normal operation of the system.

5. After排查 (eliminating) the above issues, troubleshooting can be done by replacing the control box or the gun head.

Causes: 

1. The power switch of the wire feeder is not turned on.

2. The signal wire is connected incorrectly or broken.
 
3. The wire feeding speed is too fast.
 
4. The 24V switching power supply is damaged.
 
5. The driver alarms with a red light on.
 
6. The motor is burned out.

 Solutions:
 

1. Ensure that the power switch of the wire feeder is in the on state.
 
2. Use the continuity test function of a multimeter: connect one test lead to PUL+, PUL-, DIR+, DIR- on the control box CN1, and the other test lead to PUL+, PUL-, DIR+, DIR- on the driver respectively. Measure according to the corresponding wire numbers. If there is continuity, it is normal; if there is no continuity, the signal wire is broken or connected incorrectly.

3. The effective wire feeding speed is 2-80 mm/s.
 
4. Measure whether there is voltage at the input and output ports of the switching power supply. If there is input but no output, it indicates that the power supply is burned out and needs to be replaced.

5. If it is interfered by current signals, restart the power supply to see if it can return to normal. Do not work with argon arc welding.
 
6. Use the continuity test function of a multimeter to measure the motor wires: test each pair of wires. If there is continuity in two groups, it is normal; if all wires are connected (show continuity), the motor is short-circuited and burned out, and needs to be replaced.

Causes:
 

1.The wire feeding tube is too bent.

2.The welding wire is bent and deformed inside the wire feeding tube.
 
3. The welding wire does not match the model of the wire feeding wheel.

 4. The set screw that locks the wire feeding tube is loose.
 
Solutions:
 
1. The wire feeding tube must be straightened before welding, and there must be no bends in the tube. If there is a bend, the tube needs to be cut off and reinstalled or replaced.
 

2. The welding wire must not be bent. If it is bent, it needs to be cut off to ensure that the welding wire inside the wire feeding tube is straight.

 3. Use a wire feeding wheel of the same size as the welding wire. For example, if the welding wire is stainless steel or carbon steel, use a V-shaped wire feeding wheel and a conventional wire feeding tube; if it is aluminum wire, use a U-shaped wheel and a graphene wire feeding tube.
 
4. Normally, the set screw should press against the spring tube. If it is not pressing against the spring tube, it means the screw is loose, causing the spring to retract, and the wire feeding tube needs to be reinstalled.

Causes: 

 1. The gun head does not form a loop with the ground clamp.
 

2. The ground clamp is open-circuited, the positive wire of the safety lock on the gun head is open-circuited, or the wire has poor contact. 

 
3. The terminal block is damaged or the safety lock port on the control box is damaged. 

 Solutions:
 
1. The safety lock alarm will automatically cancel after the gun head forms a loop with the ground clamp. This is a safety auxiliary function designed to prevent customers' misoperation.

 2. Use a multimeter to measure the on-off status of both ends of the ground clamp. Set the multimeter to the on-off gear, touch one test lead to the clamp and the other to the wire of the ground clamp connected to the CN6 terminal of the control box. If there is continuity, the wire is in good condition; otherwise, the wire is open-circuited and needs to be checked. Use a multimeter to measure the set screw on the side of the protective lens of the gun head: touch one test lead to the set screw and the other to the positive wire of the safety lock on the CN6 terminal of the control box. If there is continuity, the wire is in good condition; otherwise, the wire is open-circuited and needs to be checked.

 3. Short-circuit pins 3-4 of CN6 on the control box with a wire. If the alarm is eliminated, it indicates that the port and terminal block are in good condition. If there is no continuity, replace a terminal block and then short-circuit pins 3-4 again. If there is still no continuity at this time, it indicates that the port of the control box is damaged and the control box needs to be replaced.

Causes:

1.The set swing width is too small.

2.The ground clamp and the welding torch tip do not form a circuit loop.

3. There is a galvanometer alarm displayed on the screen.

4. The galvanometer reflection mirror is broken.

Solutions: 

1.Increase the swing width setting slightly. 

2. When the ground clamp and the torch tip fail to form a circuit loop, the safety lock alarm will remain displayed on the screen, and the swing function will automatically shut off within 1 minute. For subsequent welding operations, manual activation of the swing function is not required. The function will automatically activate once the torch tip and ground clamp establish a circuit loop. 

3. The motor cannot swing if there is an active galvanometer alarm on the screen. Resolve the galvanometer alarm issue first.

4. If the galvanometer reflection mirror is broken, replace the mirror. Depending on the motor's mirror mounting structure, it may be necessary to replace both the motor and the mirror assembly.

Causes:
 
1. The air pressure is too low.
 

2. The function is enabled but not wired.
 
3. Incorrect wiring.
 
Solutions:
 
1. Check if the air pressure in the gas tank is sufficient. If the air pressure is too low, replace the gas source.
 
2. First, confirm whether a pressure detection switch is installed. If it is installed, check whether the settings are correct. The normal internal setting of the system is high level.

3. The pressure switch is connected to the normally open port, and the undervoltage alarm receives a -24V alarm. Correct wiring is required to ensure the normal operation of this function.

Causes:

1. The water level of the water chiller is too low or the water chiller itself alarms.

 
2. The function is enabled but not wired.

3. Incorrect wiring.

 Solutions: 

1. Check the alarm code of the water chiller and find the fault point according to the alarm code. 

2. First, check whether the water chiller alarm signal is connected. If the wire is connected, check whether the functions set by the water chiller and the system match.

3. The water chiller is connected to the normally open port, and the flow alarm port receives a -24V alarm. Correct wiring can ensure the normal operation of this function.

Causes:

 
1. The laser itself has a fault alarm.
 
2. The function is enabled but not wired.

Solutions:

1. Connect to the laser monitoring software to check the alarm information and handle related issues according to the alarm information. 

2. First, check whether the laser alarm signal is connected. If the wire is connected, check whether the functions set by the laser and the system match.

Causes:

 1. Poor contact in the 9-pin plug of the motor signal wire, poor contact in the motor wire plug, burnt or broken motor signal wire, or false soldering in the motor signal wire.

 2. The galvanometer motor or its reflection mirror is burnt out.

 3. Control box malfunction.

 Solutions:

 1. Inspect the motor signal wires in sequence. If anomalies are found, assess whether they can be resolved on-site. If not, either send replacement parts for the customer to install or return the device to the manufacturer for repair.

 2. Remove the galvanometer motor for inspection. If issues are detected, determine if they can be fixed locally. If not, provide replacement parts for customer self-replacement or arrange return to the manufacturer.

 3. Control box faults are difficult to diagnose and require substitution testing. Check if the customer has a spare control box. If replacing the control box resolves the issue, the original control box is confirmed faulty.

Causes:

 1. Check whether the "Allow Laser Emission" function on the screen is enabled and whether the laser power is set correctly.

 2. Check if there is any alarm prompt on the screen. 

 3. Check if the laser has an alarm.

 4. Check whether the laser signal wire has poor contact and whether it is connected correctly.

 5. Measure the signal output of the CN2 port with a multimeter. 

 6. Connect to the laser to check if it has received the signal sent by the welding system. 

 Solutions:

 1. The "Allow Laser Emission" function is off when the welding system is powered on, and it needs to be turned on manually before the laser can be emitted. The minimum laser power is 10% of the rated laser power.

 2. Any alarm status on the screen of the welding system will prevent the laser from being emitted. If there is an alarm, troubleshoot according to the alarm information.

 3. Connect to the laser to view the alarm information and handle the alarm according to the prompts.

 4. First, check whether the laser signal wire is connected correctly, then check whether the laser signal wire has poor contact, and finally check whether the terminal where the laser signal wire is connected to the laser is in good contact.

 5. Before measuring the voltage of the CN2 port, ensure that the machine is in the laser emitting state, and the screen shows "Laser Emitting, Blowing, Wire Feeding". Pins 1-2 are modulation voltage, which is normally about 24V; the voltage for cleaning is lower, about 15V. Pins 3-4 are analog voltage, and the voltage varies according to the set laser power. For example, if the full power voltage is 10V, setting the laser power to half of the rated power will result in a voltage of 5V. Pins 6-9 are enable voltage, which is normally about 24V. Pins 8-10 are red light voltage, which is 0V when the laser is emitting and about 24V when the laser is not emitting.

 6. Connect to the laser monitoring software to check if the laser has received the laser emission signal. If the laser receives the emission signal but no laser is emitted, there may be a problem with the laser; if no signal is received, there may be a broken signal wire or an abnormal output of the welding system.

Causes:

 1. The gas cylinder is not opened or there is no gas left in the cylinder.

 2. The air blowing port is burned out.

 3. The solenoid valve is burned out.

 4. Continuous air blowing cannot be stopped.

 5. The gas path is blocked.

 Solutions:

 1. Check whether the gas cylinder switch is turned on and then check whether there is gas in the cylinder.

 2. Click on the diagnostic interface, click "Manual Air Blowing" on the screen and check if the air blowing indicator on the diagnostic interface is on. If it is on, use a multimeter to measure pins 1-2 of the CN8 port in this state. The normal voltage should be 24V; if there is no voltage, it indicates that the port is burned out.

 3. Use a multimeter to measure the wiring port on the solenoid valve. If there is a 24V voltage but the solenoid valve does not work, it means the solenoid valve is burned out.

 4. When "Manual Air Blowing" is not clicked on the screen, measure pins 1-2 of CN8 to check if there is 24V. If there is no voltage, it is normal; if there is voltage, it indicates that the control box port is burned out. If the control box has no voltage output but air keeps blowing, it is caused by the solenoid valve failing to shut off the gas.

 5. First, check the gas flow of the cylinder, then check the gas flow after the gas passes through the solenoid valve, then check the gas flow at the gas pipe joint from the solenoid valve to the gun head, and finally check the gas path of the gun head.

Causes: 

 1. The QBH is not locked properly. 

 2. The lens is burnt out.

 3. The wrong lens is used.

 Solutions:

 1. Check if the optical fiber is locked properly. Hold the gun head with one hand and the optical fiber head with the other, and rotate left and right to see if there is any looseness. Even a little looseness means it is not locked tightly, so it needs to be disassembled and reinstalled.

 2. First, check if the double protective lenses are burnt out, then check the focusing lens, and finally check the collimating lens. When checking, the lens should be viewed against the light to accurately determine whether the lens is intact.

 3. Using the wrong focusing lens and collimating lens will cause the focal length to change, and reversing their installation will also cause the focal length to change. In normal installation, the convex surfaces of both the focusing lens and the collimating lens should face the reflecting lens.

Causes:
 
 1. Incorrect wiring or poor contact of the signal wires.

 2. Incorrect connection of the 24V-15V wires on the control box or a burnt-out power supply.

 3. Issues with the control box or the screen.

 Solutions:

 1. First, check if the signal wires connecting the screen cable to the HMI port on the control box are correctly connected and making good contact. Then, verify the wiring of the screen signal wires. The correct connections are: OVCC to OVCC, GND to GND, TXD to RXD, and RXD to TXD. Use a multimeter to measure the voltage between pins 2-4 and 3-4 of the HMI port (two sets of measurements in total). The normal voltage should be 5V-7V. If there is no voltage, it indicates a problem with the control box or the screen.

 2. Use a multimeter to measure the CN5 port on the control box:   - Connect the red probe to 24V+ and the black probe to 24V-. The normal voltage should be 24V. If not, the power supply may be burnt out or the wiring is incorrect.   - Connect the red probe to 15V+ and the black probe to COM. The normal voltage should be 15V+. If not, check for a burnt-out power supply or incorrect wiring.   - Connect the red probe to 15V- and the black probe to COM. The normal voltage should be 15V-. If not, inspect the power supply and wiring. 

 3. Faults in the control box or screen can only be diagnosed by substitution.