VEVOR TIG Welder AC/DC 3 in 1 TIG/MMA/ARC Welding Machine User Manual
- June 9, 2024
- VEVOR
Table of Contents
TIG Welder AC/DC 3 in 1 TIG/MMA/ARC Welding Machine
User Manual
This welding machine for industrial and professional use is in conformity with
IEC 60974 International Safety Standard.
Please read and understand this operator’s manual carefully before the
installation and operation of this machine.
The contents of this manual may be revised without prior notice.
This operator’s manual is issued in September 2015.
SAFETY
Welding is dangerous, and may cause damage to you and others, so take good protection when welding. For details, please refer to the operator safety guidelines in conformity with the accident prevention requirements of the manufacturer.
| Professional training is needed before operating the machine.
- Use labor protection welding supplies which are authorized by national security supervision department.
- Operators should possess valid work permits for metal welding (cutting) operations.
- Cut off power before maintenance or repair.
---|---
| Electric shock—may lead to serious injury or even death.
- Install earth device according to the application criteria.
- Never touch the live parts when you are skin bared or wearing wet gloves/clothes.
- Make sure that you are insulated from the ground and workpiece.
- Make sure that your working position is safe.
| Smoke & gas—may be harmful to health.
- Keep your head away from smoke and gas to avoid inhalation of exhaust gas from welding.
- Keep the working environment well ventilated with exhaust or ventilation equipment when welding.
| Arc radiation—may damage eyes or burn skin.
- Wear suitable welding masks and protective clothing to protect your eyes and body.
- Use suitable masks or screens to protect spectators from harm.
| Improper operation may cause fire or explosion.
- Welding sparks may result in a fire, so please make sure no combustible materials nearby and pay attention to fire hazard.
- Have a fire extinguisher nearby, and it needs a trained person to use it.
- Airtight container welding is forbidden.
- Do not use this machine for pipe thawing.
| Hot workpiece may cause severe scalding.
- Do not touch hot workpiece with bare hands.
- Cooling is needed during continuous use of the welding torch.
| Noise may be harmful to people’s hearing.
- Wear approved ear protection when welding.
- Warning spectators that noise may be harmful to their hearing.
| Magnetic fields affect cardiac pacemaker.
- Pacemaker users should be away from the welding spot before medical consultation.
---|---
| Moving parts may lead to personal injury.
- Keep yourself away from moving parts such as fan.
- All doors, panels, covers and other protective devices should be closed during operation.
| Please seek professional help when encountering machine failure.
- Consult the relevant contents of this manual if you encounter any difficulties in installation and operation.
- Contact the service center of your supplier to seek professional help if you still can not fully understand after reading the manual or still can not solve the problem according to the manual.
MAIN PARAMETER
MODEL| TIG160S TIG160S11| TIG200S TIG200S II| | TIG180A
TIG180a| | TIG200A TIG200A| | TIG180P TIG180PII| TIG200P
TIG200PII
---|---|---|---|---|---|---|---|---|---
Input voltage (V)| | Single-phase| AC220V/AC230V| ±15%
Frequency (Hz)| | | 50/60|
Input current (A)| 15| 21| | 18| | 18| | 18| 21
No-load voltage (V)| 42| 42| | 56| | 56| | 56| 56
Output current range| 10–160A| 10–200.’.| | 10–180A| | 10-180A| | 10-180A|
10-200A
Rated voltage (V)| I6.4V| I8V| | 17V| | 17V| | 17V| I8V
Post-flow time (S)| 2.5, 5| 2.5, 5| | ‘2.5. 5| | 2.5, 5| | 5| 5
Arc force range| —| —| | | | Automatic| | Automatic| Automatic
Duty cycle| | | 60%|
No-load loss (W)| 35| 135| | :0| | 140| | 10| 40
Arc ignition| | | HF|
Pulse frequency (Hz)| —| —| | —| | —| | LF: 2.5
MF: 200| LF: 2.5
NF: 200
Efficiency| | | 85%|
Power factor| | | 0.93|
Insulation class| | | B|
Protection class| | | 1P23|
Weight (kg)| 8| 19| | 8| | 18| | 19| 19
Note: The post-flow time of TIG160SⅡ, TIG200SⅡ, TIG180AⅡ and TIG180PⅡ is
1～10s adjustable.
Schematic block diagram (single-phase input)
MODEL| TIG250/
(TIG250 single-phase)| TIG300S/
(TIG300S single-phase)| TIG300| TIG400
---|---|---|---|---
Input voltage (V)| 3-phase AC380V±15%
(Single-phase AC200V±15% for TIG250 single-phase and TIG300S single-phase)
Frequency (Hz)| 50/60| 50/60| 50/60| 50/60
Input current (A)| 9/5/29| 12/5/38| 13.| 20.
No-load voltage (V)| 70/62| 42| 70| 80
Output current rang,| 10-250A| 10–300A| 10-300A| 25-400A
Rated voltage (V)| 20V| 22V| 22V| 26V
Arc force range (A)| 0-100/0-60| —| 0’100| 0-100
Post-flow time (S)| 10 (Adjustable)| 5| 10 (Adjustable)| 5
Duty cycle| 60%| 60%| 60%| 60%
No-load loss (W)| i0| 40| 60| 100
Arc ignition| HF| HF| HF| HF
Efficiency| 85%| 85%| 85%| 85%
Power factor| 0.93| 0.93| 0.93| 0.93
Insulation class| F| F| F| F
Protection class| IP23| IP23| IP23| IP23
ISeight (kg)| 19| 19| 22.| 27
Note: Single-phase 230V type and 3-phase 380V type are available on TIG250 and
TIG300S.
Schematic block diagram (3-phase input)
INSTALLTION & OPERATION
To reduce voltage drop, it is suggested to use cable with bigger cross section
when the output cable is relatively long. If the torch cable is too long, the
performance of this welding machine such as arc ignition will be possibly
affected because the inner resistance of the cable will reduce the output
voltage.
4.1 The connection of the input cable.
-
A primary power supply cable is available for this welding machine. Connect the power supply cable to the rated input power. (Ground connection is needed for safety purpose.)
The input voltage of TIG160 /180/200 is single-phase 230V, and the input voltage of TIG250/300/400 is 3-phase 380V. -
The primary cable should be tightly connected to the correct socket to avoid oxidization.
-
Check whether the voltage value varies in acceptable range by using a multi-meter.
4.2 The connection of output cable.
TIG: Applicable to TIG160S/TIG200S
- Correctly connect the TIG torch according to the above drawing. Connect the gas-electric connector of the TIG torch to the corresponding connector (2a) on the machine panel, and tighten it clockwise.
- Connect the aviation plug on the TIG torch to the corresponding socket (2b) on the machine panel, and tighten it clockwise.
- Insert the quick plug on the earth cable into the “+” quick socket (2c) on the machine panel, and tighten it clockwise. Clamp the workpiece with the earth clamp at the other end of the earth cable.
- Tightly connect the gas hose to the gas inlet on the back panel of the machine. The gas path should include the cylinder, gas regulator and gas hose. The joint with the hose should be tightened with a hoop to prevent gas leakage and air mixing. Otherwise, weld bead cannot be well protected.
- The enclosure of the machine must be grounded with a lead (cross section≥4mm2 ) to avoid static and electric shock. A ground terminal marked with the symbol is located on the back panel of the machine for this purpose.
◆ MMA & TIG: Applicable to TIG180A/TIG200A/TIG180P/TIG20P/TIG300/TIG400.
Refer to the above steps for output cable connection when you use the machine
for TIG welding. When you use the machine for MMA welding, Please note:
- Two quick plugs are available for this welding machine. Insert the quick plugs into the quick sockets on the front panel of the machine, and tighten them with an inner hexagon spanner to ensure good contact. Otherwise, the plugs and sockets will be burned if the working time is long and the working current is high.
- Insert the cable plug with electrode holder into the “＋” socket (2c) on the front panel of the welding machine, and tighten it clockwise. Insert the cable plug with work clamp into the “－” socket (2d) on the front panel of the welding machine, and tighten it clockwise.
- Generally, DCEP polarity and DCEN polarity are available in MMA.
DCEP: Connect the electrode holder to “＋” output terminal, and the work clamp to “－” output terminal.
DCEN: Connect the electrode holder to “－” output terminal, and the work clamp to “＋” output terminal.
4.3 Operation
Main switch (3): Switch the power switch on the back panel to “ON”, the
machine is started with the power LED on and the fan working.
switch (4): Toggle between TIG and MMA.
TIG operation
- Switch the switch to “ ”.
- Open the gas valve of the cylinder, and adjust the gas regulator to the desired value.
- Switch the power switch on the back panel to “ON”, the machine starts with the power LED and the fan. Press the torch trigger, the solenoid valve works and there is gas output.
- Adjust the welding current according to the thickness of the workpiece.
- Keep the torch 2 – 4 mm away from the workpiece, and then press the torch trigger. After arc is ignited, the HF discharge rustling disappears, and welding can be carried out.
MMA operation
- Switch the switch to “ ”.
- Adjust the welding current according to the thickness of workpiece.
Welding current knob (5): It can adjust the output current.
Overheating LED (6): It can indicate overheating. Overheating LED indicates
that the temperature inside the machine is too high and the machine is under
overheating protection status.
Digital meter (7): It can display the welding current value. (Applicable to
TIG300S/TIG250/TIG300/ only)
Pulse selecting switch (8): Switch the switch to “ ”, and then set . Note: “ ”
— no pulse; “ ” — medium frequency; “ ” — low frequency. (Applicable to
TIG180P/200P only) 
2T/4T switch: This function can be added upon customers’ request.
Select proper welding mode 2T or 4T. Note: 2T – General pulsed TIG welding; 4T
– Multifunctional welding. The operation in 4T is as follows: Adjust the arc
ignition current, upslope time, welding current, base current, downslope
time, crater current and post-flow time according to the welding application
requirement. Keep the torch 2 – 4 mm away from the workpiece, and then press
the torch trigger. After arc is ignited, release the torch trigger, and the
current will slowly increase to the peak current value. Then, normal welding
can be carried out. After the welding is completed, press the torch trigger
again, and current will slowly drop to the crater current value. Release the
torch trigger after the crater is well filled, and the machine will stop
working.
Downslope time control (10): The downslope time can be adjusted between 0 to
10 seconds.
Post-flow time control (11): The post-flow time is the period from arc goes
out to the gas supply stops, and it can be adjusted between 1 to 10
seconds.
Arc force current control (12): Applicable to TIG250/TIG400 only.
You may adjust the arc force upon your requirement in MMA welding. This arc
force control knob is used to control welding performance. Especially, it can
be used together with the welding current control knob under low current to
adjust the arc ignition current conveniently. It is not controlled by the
welding current control knob. Thus, big arc force can be obtained in low
current welding.
Pulsed frequency control (13): See the waveform characteristic below.
Base current control (14): Applicable to TIG180P/TIG200P only.
It is not applicable in MMA welding. Switch the pulse selecting switch to “ ”
or “ ”, and adjust the base current according to the thickness of workpiece.
Peak current control (15): Applicable to TIG180P/TIG200P only.
It is not applicable in MMA welding. Switch the pulse selecting switch to “ ”
or “ ”, and adjust the peak current according to the thickness of workpiece.
Waveform characteristic
WELDING PARAMETERS TABLE
Table 1- Parameters for TIG welding on stainless steel sheet (for reference only)
Plate
Thickness
(mm)| Welding joint| Electrode
diameter
(mm)| Wire
diameter
(mm)| Current type| Welding
current
(A)| Gas flow
(L/min)| Welding
speed
(cm/min)
---|---|---|---|---|---|---|---
1.0
1.2
1.5| Butt Joint| 2
2
2| 1.6
1.6
1.6| MEN| 7–28
15
5–19| 3–4
3–4
3–4| 12–47
25
8–32
Table 2- Parameters for TIG welding on titanium and titanium alloy (for reference only)
Plate
thickness
(mm)| Groove
type| Welding
layers| Electrode
diameter
(mm)| Wire
diameter
(mm)| Welding
current
(A)| Gas flow (L/min)| Nozzle
diameter
(mm)
---|---|---|---|---|---|---|---
LO C:, LO 0 LO
O .-1 .-1 c.i cNi| Square
groove| | 1.5
2.0
2.0
2. 0-3.
2.0-3.| 0
0| 1.0
1. 0-2. 0
1. 0-2. 0
1. 0-2. 0
2. 0| 30-50 40-60 60-80 80-110 110-420| 8-10 8-10 10-12 12-14 12-44| 6-8 6-8
8-10 10-12 10-42| 14-16 14-16 14-16 16-20 16-20| 10
10
10-12
12-14
12-14
0 0 0 0 0 0
cri gztri Lei ca t-: 00| Single V
groove
with root
face| CI Cr) Cv, Cr) ‘Tr i” 2 l ? I C1 C 1 C 1 0,| 3.0
3.0-4.
4.0
4.0
4. 0
4. 0| 0| 2. 0-3. 0
2.0-3. 0 3.0
3.0-4. 0
3. 0-4. 0
3. 0-4. 0| 120-140 130-150 130-150 140-180 140-180 140-180| 12-14 14-16 14-16
14-16 14-16 14-16| 10-12 12 14 12-14 12-14 12-14 12-14| 16-20
20-25
20-25
25-28
25-28
25-28| 14-18
18-20
18-20
18-20
20-22
20-22
1020222530| Double V
groove
with root
face| 4-6
12
12
15-46
17-48| 00000
ti. 4 4 -41 -41| 3.0-4. 0 4.0
4.0-5. 0 3. 0-4. 0 3. 0-4. 0| 160-200 200-240 230-250 200-220 200-220| 14-16
12-14 15-18 16-18 16-18| 12-14 10-12 18-20 20-26 20-26| 25-28
20
18-20
26-30
26-30| 20-22
18
20
22
22
Plate thickness
(mm)| Current (A)| Duration (s)| Pulse
frequency
(Hz)| Welding speed
(cm/min)
---|---|---|---|---
Pulse| Base value| Pulse| Base value
0.3| 20-22| 5-8| 0. 06-0. 08| 0.06| 8| 50-60
0.5| 55-60| 10| 0.08| 0.06| 7| 55-60
0.8| 85| 10| 0.12| 0.08| 5| 80-100
Table 3- Parameters for pulsed TIG welding on stainless steel sheet (for
reference only)
Table 4- Parameters for TIG welding on aluminum and aluminum alloy (for
reference only)
Plate
thickness
(mm)| Groove
type| Welding
layers| Electrode
diameter
(mm)| Wire
diameter
(mm)| preheat
temperature
(C)| Welding
current
(A)| Gas flow
(L/min)| Nozzle
diameter
(mm)
---|---|---|---|---|---|---|---|---
1.5
2| Square
groove| 1/0
1/0| 2
2–3| 1.6 –2.0
2 –2.5| | 50–80
50^-80| 7–9
8^-12| 8
8′-12
3
4
5
8
10
12
16
20| Single V
groove
with root
face| 1/0
1 –2/1
1^-2/1
2/1
3^-4/1^-2
3 –4/1 –2
4 –5/1 —2
4–5/1^-2| CD
M .771 .7t4 LC, LC) / C.0 to
LO| C.TI c.n a pls a 0.1 t•J
1 1 1 1 1 1 CA) 1
CD 0) 01 C71 01 a 0.1| 100
100^-150
150-200
200-220
200^-260| 15–180
180^-200
180 –240
260^-320
280^-340
300^360
340^380
360^400| 8–12
10^-15
10–15
16^20
16^-20
18^-22
20–24
25–30| 8
8–12
8′-12
10-12
14^-16
14–16
16^-20
20^22
16-20
22 –25| Double V
groove| 2–3/2–3
2 –3/2 –3| 6
6–7| 5 –6
5 –6| 200–260
200–260| 300–380
360^-400| 25^-30
30^-35| 16^-20
20^22
FAQ
The phenomena listed below may be caused by the accessory you use, the working environment or the power supply condition. Try to improve the working environment to avoid such occurrence.
Black weld bead
This indicates that the weld bead is not well protected and is oxidized.
Please check the following points.
-
Make sure the gas valve of the cylinder is open and the pressure inside the cylinder is sufficient.
Generally, it is necessary to refill the cylinder when the pressure is lower than 0.5MPa. -
Check if the gas flow is normal. You may select different gas flow according to welding current value. However low the current is, the gas flow is recommended to be not less than 5L/min. Otherwise, the weld bead may not be fully covered for lack of shielded gas.
-
Make sure the gas path is not blocked. Check if there is gas output from the nozzle of the welding torch with your hand.
-
Check if the gas path is airproof and if the gas is pure enough.
-
Check if the environment is with strong wind.
-
Check if the pulse duration ratio is too low.
Arc is hard to start but easy to break.
- Make sure the electrode you use is of good quality, because the electrode of bad quality may not meet the discharge requirement.
- Make sure the electrode is sharpened, because arc is hard to ignite and unstable when using the unsharpened electrode.
Unstable current during welding
This may be caused by the following:
- Mains voltage fluctuates badly.
- There is serious interference from other electric appliances.
CAUTION
7.1 Working environment
- Welding should be carried out in dry environment with its humidity not greater than 90%.
- The temperature of the working environment should be between -10℃ to 40℃.
- Avoid welding in the open air unless sheltered from sunlight and rain. Keep it dry anytime and do not place it on wet ground or in puddles.
- Avoid welding in dusty area or environment with corrosive chemical gas.
- Gas shielded arc welding should be operated in environment without strong wind.
7.2 Safety tips
Overvoltage, overcurrent and overheating protection circuit are installed in
this machine. If the output current or the temperature inside the machine is
too high, the machine will stop automatically. However, excessive use (e.g.
too high voltage) of machine may also damage the machine, so please note:
-
Ventilation
This welder can create powerful welding current that has strict cooling requirements. Therefore the two built-in fans are very important in enabling the machine to work stable with effective cooling.
The operator should make sure that the louvers be uncovered and unblocked. The minimum distance between the machine and nearby objects should be 30cm. Good ventilation is of critical importance to the normal performance and lifespan of the machine. -
Overload is forbidden.
Remember to observe the max load current at any moment (refer to the corresponding duty cycle). Make sure that the welding current should not exceed the max load current. Overload could obviously shorten the machine’s lifespan, or even damage the machine. -
Overvoltage is forbidden.
Regarding the power supply voltage range of the machine, please refer to “Main Parameters” table. This machine is of automatic mains voltage compensation, which ensures that the welding current varies within the given range. In case that the input mains voltage exceeds the tolerance value, it would possibly damage the components of the machine. -
The enclosure of the machine must be grounded. A ground terminal marked with the symbol is located on the back panel for this purpose.
-
A sudden halt may occur with the overheating LED on while the machine is of over-load status. Under this circumstance, it is unnecessary to restart the machine. Keep the built-in fan working to lower the temperature inside the machine. Welding can be continued after the inner temperature falls into the standard range and the overheating LED is off.
MAINTENANCE
-
Warning: Cut off the power before maintenance and repair. Make sure the power supply is cut off before uncovering the machine.
-
Check periodically whether inner circuit connection is in good condition (esp. plugs). Tighten the loose connection.
If there is oxidization, remove it with sandpaper and then reconnect them. -
Keep hands, hair and tools away from the moving parts such as the fan to avoid personal injury or machine damage.
-
Clean the dust periodically with dry and clean compressed air. If cutting in environment with heavy smoke and pollution, the machine should be cleaned daily.
-
The pressure of compressed air should be at a proper level in order to avoid the small parts inside the machine to be damaged.
-
Avoid rain, water and vapor infiltrating the machine. If there is, dry it and check the insulation with equipment (between the connections and between the connection and the enclosure). Only when there are no abnormal phenomena any more, then the machine can be used.
-
Put the machine into the original packing in dry location if it is not used for a long time.
TROUBLESHOOTING
Note：Only the qualified technicians are authorized to undertake the
maintenance and repair task in case of machine fault.
9.1 Troubleshooting for TIG160S/TIG200A/TIG 200S/TIG180A/TIG180P/TIG200P
/single-phase TIG300S/single-phase TIG250
Malfunction Phenomena
|
Cause and Solution
---|---
Turn on the machine, the power LED is off, the fan does not work, and no
welding output.| 1. Check if the power switch is damaged.
2. There is no input power.
3. Check if the input cable is well connected.
Turn on the machine, the power LED is on, but the fan does not work or it
stops working after a few turns, and there is no welding output.| 1.
Overvoltage protection occurs because the machine is wrongly connected to 380V
power supply. Connect the machine to the 230V power supply and restart the
machine.
2. The 220V is unstable (The input cable is too thin or too long.) or the
input cable is not well connected to the mains power supply, which lead to
overvoltage protection. Replace with a cable with bigger cross section or
reconnect the input cable. Shut down the machine, and restart it after 2 – 3
minutes.
3. The power switch is switched too frequently in a short time, which lead to
overvoltage protection. Shut down the machine, and restart it after 2 – 3
minutes.
4. Check if the switch wire is loosely connected to the power PCB, and
reconnect it if necessary.
5. The 24V relay on the power PCB is not closed or damaged. Check the 24V
power supply and relay, and replace the relay if it is damaged.
Turn on the machine, the fan works, the protection LED is off, but there is no
HF discharge rustling, and arc cannot be ignited even by scraping.| 1. Check
if the voltage of the power PCB to the anode and cathode of VH-07 on the MOS
board is about DC308V.
- Check if the connecting wire of the rectifier bridge is not well connected.
- Check if creepage exists in some of the four electrolytic capacitors
(470UF/450V) on the power PCB, and replace them if necessary.
2. There is a LED for the auxiliary power supply on the MOS board. If the LED is off and the auxiliary power supply does not work, find out the solution.
3. Check if any loose contact exists inside the machine.
4. Check if the control circuit fails. Find out the solution or contact your supplier.
5. Check if the control wire of the torch is broken.
Turn on the machine, the protection LED is off, there is HF discharge rustling, but no welding output.| 1. Check if the torch cable is broken.
2. Check if the earth cable is broken or is not connected to the workpiece.
3. Check if the “+” output terminal or gas-electric output terminal of the torch is not well connected to the joint inside the machine.
Malfunction Phenomena
|
Cause and Solution
---|---
Turn on the machine, the protection LED is off, but there is no HF discharge rustling, and arc can be ignited by scraping.
| 1. The primary wire of the arc ignition transformer is not well connected
to the power PCB. Reconnect it.
2. The discharge nozzle is oxidized or the interelectrode distance of the
discharge nozzle is too long. Get rid of the oxidation film or adjust the
interelectrode distance of the discharge nozzle to about 1mm.
3. Check if the MMA/TIG switch is damaged, and replace it if necessary.
4. Check if there are some parts in the HF arc ignition circuit, and replace
them if necessary.
Turn on the machine, the protection LED is on, and there is no welding
output.| 1. Overcurrent protection: Shut down the machine, and restart it
when the protection LED is off.
2. Overheating protection: Wait for 2 – 3 minutes without shutting down the
machine, and it will recover automatically. (Machines for TIG welding only are
without overheating protection function.)
3. The inverter or arc ignition board fails. Pull out the power supply plug
(near VH-07 of the fan) of the main transformer on the MOS board, and restart
the machine.
- If the protection LED is still on, shut down the machine, pull out the
power supply plug (near VH-03 of the fan) of the HF arc ignition power supply,
and restart the machine.
A. If the protection LED is still on, check if some of the MOSFET on the MOS board are damaged, and replace them if necessary.
B. If the protection LED is off, check if the transformer booster in the HF arc ignition circuit on the power PCB is damaged, and replace it if necessary. - If the protection LED is off:
A. Check if the transformer on the center PCB is damaged, and replace it if necessary.
B. Check if some secondary rectifier diode of the transformer is broken down, and replace it if necessary.
4. The feedback circuit opens.
The output current is unstable and cannot be controlled by potentiometer when welding.| 1. Check if the potentiometer (1K) is damaged, and replace it if necessary.
2. Check if any loose contact exists inside the machine.
There is excessive spatter in MMA welding, and it is hard to ignite the basic electrode.| The output polarity is incorrect. Exchange the polarity.
9.2 Troubleshooting for TIG250/TIG400
| Malfunction Phenomena | Cause and Solution |
|---|
Turn on the machine, the fan does not work, and there is no display on the
digital meter and no welding output.| 1. Make sure the air switch is not
damaged and is closed.
2. No input power.
3. Check if the four thermal resistors on the power PCB are damaged. (This is
mainly caused by the bad contact of the DC24V relay or that the relay is not
closed.)
4. The power PCB fails, and there is no DC537V output.
- The rectifier bridge opens or it is not well connected.
- Some parts on the power PCB are burned.
- Check if the air switch is well connected to the power PCB and if the power
PCB is well connected to the MOS board (inverter PCB).
5. The auxiliary power supply on the control PCB fails.
Turn on the machine, the fan works, the protection LED is off, but there is no HF discharge rustling, and arc cannot be ignited even by scraping.| 1. Check if any loose contact exists inside the machine.
2. Check if the control circuit fails. Find out the solution or contact your supplier.
3. Check if the control wire of the torch is broken.
Turn on the machine, the protection LED is off, there is HF discharge rustling, but no welding output.| 1. Check if the torch cable is broken.
2. Check if the earth cable is broken or is not connected to the workpiece.
3. Check if the “+” output terminal or gas-electric output terminal of the torch is not well connected to the joint inside the machine.
Turn on the machine, the protection LED is off, but there is no HF discharge rustling, and arc can be ignited by scraping.| 1. The primary wire of the arc ignition transformer is not well connected to the arc ignition board. Reconnect it.
2. The discharge nozzle is oxidized or the interelectrode distance of the discharge nozzle is too long. Get rid of the oxidation film or adjust the interelectrode distance of the discharge nozzle to about 1mm.
3. Check if the MMA/TIG switch is damaged, and replace it if necessary.
4. Check if there are some parts in the HF arc ignition circuit, and replace them if necessary.
Malfunction Phenomena
|
Cause and Solution
---|---
Turn on the machine, the protection LED is on, and there is no welding
output.|
1. Overcurrent protection: Shut down the machine, and restart it when the
protection LED is off.
2. Overheating protection: Wait for 2 – 3 minutes without shutting down the
machine, and it will recover automatically.
3. The inverter or arc ignition board fails. For double-inverter machine,
pull out the power supply plug (near -07 of the panel) of one inverter, and
restart the machine. If the protection LED is off, it indicates that this
inverter fails. Otherwise, the other inverter fails. Follow the below steps to
eliminate this problem for both single-inverter machine and double-inverter
machine.
- If the protection LED is still on, shut down the machine, pull out the
power supply plug (near VH-03 of the fan) of the arc ignition power supply,
and restart the machine.
A. If the protection LED is still on, check if some of the MOSFET on the MOS board are damaged, and replace them if necessary.
B. If the protection LED is off, check the arc ignition board and transformer booster for damage, and replace the transformer booster if necessary. - Connect the power supply of the failed inverter, and restart the machine
with the power cord of the main transformer unconnected.
A. If the protection LED is off, check if the transformer on the center PCB is damaged, and replace it if necessary.
B. Check if some rectifier diode on the center PCB is damaged, and replace it if necessary
4. The feedback circuit opens.
The output current is not high enough and cannot be controlled by
potentiometer when welding.| 1. The secondary cable is overly long or thin.
Shorten the secondary cable or replace with one of bigger cross section.
2. Check if the machine is in remote control mode.
3. Check if the current potentiometer is damaged.