1. Important Safety Information
Welding operations involve significant risks. Always prioritize safety to prevent injury or damage. Read and understand all safety warnings and instructions before operating the AZZUNO TIG-200L welder.
General Safety Precautions:
- Electric Shock: Welding current can cause fatal electric shock. Ensure proper grounding. Do not touch live electrical parts. Wear dry welding gloves and protective clothing.
- Fumes and Gases: Welding fumes and gases can be hazardous to your health. Work in a well-ventilated area. Use a fume extractor if necessary.
- Arc Rays: Arc rays can burn eyes and skin. Wear a welding helmet with appropriate shade filter and protective clothing.
- Fire and Explosion: Welding sparks and hot metal can cause fires. Keep flammable materials away from the welding area. Have a fire extinguisher readily available.
- Burns: Hot metal and equipment can cause severe burns. Wear protective gloves and clothing.
- Noise: Excessive noise can damage hearing. Wear ear protection.
- Pacemakers: Electromagnetic fields from welding can interfere with pacemakers. Consult a doctor before welding.
Always ensure all connections are secure and the machine is in good working order before starting any welding task.

Figure 1.1: The AZZUNO TIG-200L welder features built-in protections against overload, overheating, overvoltage, and overcurrent to enhance user safety during operation.
2. Product Overview
The AZZUNO TIG-200L is a versatile 200 Amp 5-in-1 TIG welding machine designed for a wide range of welding applications. It supports both 110V and 220V input voltages, making it suitable for various work environments. This machine integrates multiple welding processes, offering precision and control for different materials and tasks.
Key Features:
- 5-in-1 Welding Modes: DC High-Frequency TIG, Pulsed HF TIG, COLD TIG, SPOT TIG, and Stick (MMA) welding.
- Dual Voltage Capability: Operates on both 110V and 220V power supplies.
- Pulsed TIG & Cold TIG: Provides enhanced control for thin metals, minimizing heat input and distortion.
- Memory Function: Save and recall up to 10 custom welding parameter sets for efficiency.
- Large LED Display: Clear and easy-to-read digital panel for precise parameter adjustments.
- Multi-Material Capability: Suitable for stainless steel, carbon steel, copper, and more (Note: AC TIG is recommended for aluminum welding).

Figure 2.1: The AZZUNO TIG-200L welding machine, showcasing its compact design and user-friendly interface.

Figure 2.2: Visual representation of the 5-in-1 multiprocess capabilities of the TIG-200L welder.
3. Included Accessories
The following items are included with your AZZUNO TIG-200L welding machine. Please inspect the package contents upon arrival to ensure all items are present and undamaged. (Note: The list in the physical manual may contain errors; refer to this list for accuracy.)
- Electrode Holder × 1
- Ground Clamp × 1
- 110V~220V Adapter × 1
- Gas Hose × 1
- Hose Band × 2
- TIG Torch with Consumables (Ceramic Cups × 3, Collet × 3, Collet Body × 1, Long Back Cap × 1, Short Back Cap × 1)
Important: A Gas Regulator and Tungsten Electrodes are NOT included and must be purchased separately for TIG welding operations.

Figure 3.1: Overview of the AZZUNO TIG-200L welder and its standard accessories.
4. Setup Instructions
Proper setup is essential for safe and effective welding. Follow these steps carefully.
4.1 Power Connection
- Ensure the welder's power switch is in the "OFF" position.
- Connect the appropriate power cord (110V or 220V) to the welder and a suitable power outlet. Use the provided adapter for 110V/220V conversion if necessary.
- Verify that the power source matches the welder's requirements and is properly grounded.
4.2 TIG Welding Setup
- Gas Cylinder: Connect your Argon gas cylinder to a gas regulator (not included).
- Gas Hose: Attach the gas hose (included) from the regulator to the gas inlet on the rear of the welder. Secure with hose bands.
- TIG Torch: Connect the TIG torch cable to the appropriate connector on the front panel of the welder. Ensure it is securely tightened.
- Ground Clamp: Connect the ground clamp cable to the negative (-) terminal on the welder's front panel. Attach the ground clamp securely to the workpiece, ensuring good electrical contact.
- Tungsten Electrode: Install a suitable tungsten electrode into the TIG torch collet. Ensure the electrode is properly sharpened and extends an appropriate distance from the ceramic cup.
4.3 Stick (MMA) Welding Setup
- Electrode Holder: Connect the electrode holder cable to the positive (+) terminal on the welder's front panel.
- Ground Clamp: Connect the ground clamp cable to the negative (-) terminal on the welder's front panel. Attach the ground clamp securely to the workpiece.
- Electrode: Insert the desired welding electrode (e.g., E6013) into the electrode holder.

Figure 4.1: Connection diagrams for Stick (MMA) and TIG welding modes. Note the polarity for TIG welding where the workpiece is typically connected to the positive terminal for DC TIG.
5. Operating Instructions
Familiarize yourself with the control panel and welding modes before beginning operation.
5.1 Control Panel Overview
The large LED display provides clear feedback on welding parameters. Use the buttons and central knob to navigate and adjust settings.

Figure 5.1: The TIG-200L's large LED control panel, showing parameter display and control elements.
- Button A (Left Side): Selects welding modes (MMA, TIG, COLD, TIG-P, SPOT).
- Button & Knob B (Center): The central knob rotates to adjust parameter values. Pressing the knob cycles through available parameters for the selected mode.
- Button C (Right Side, 2T/4T): Toggles between 2T (Two-Touch) and 4T (Four-Touch) trigger modes.
- Button D (Right Side, RECORD/SAVE): Used for saving and recalling welding parameter sets.
5.2 Welding Modes and Parameters
Select the desired welding mode using Button A and adjust parameters with the central knob.
- MMA (Stick) Welding:
- Arc Force: Adjusts the welding current during short-circuiting to prevent electrode sticking.
- Hot Start: Provides a temporary increase in current at the start of welding for easier arc ignition.
- VRD (Voltage Reduction Device): Reduces open-circuit voltage for increased safety.
- TIG Welding (DC HF TIG):
- Pre-flow: Duration of gas flow before arc ignition.
- Start Current (I start): Current at the beginning of the weld.
- Peak Current (I peak): Maximum welding current.
- Base Current (I base): Minimum welding current (for Pulse TIG).
- Up Slope: Time taken for current to rise from start current to peak current.
- Down Slope: Time taken for current to fall from peak current to crater current.
- Crater Current (I crater): Current at the end of the weld to fill the crater.
- Post-flow: Duration of gas flow after the arc extinguishes to protect the weld puddle and tungsten.
- Weld Time: Duration of the welding arc.
- Pulsed HF TIG (TIG-P):
This mode offers greater control and cleaner welds on thin metals by cycling between peak and base currents.
- Pulse Frequency: Number of pulses per second.
- Pulse Width: Percentage of time spent at peak current during a pulse cycle.
- Other parameters similar to standard TIG.
- COLD TIG:
Minimizes heat input to reduce distortion and prevent burn-through, ideal for delicate or heat-sensitive materials like stainless steel and thin sheet metal.
- SPOT TIG:
Used for precise, short-duration spot welds.

Figure 5.2: Visual guide to TIG welding modes and 2T/4T trigger functions.

Figure 5.3: Stick welding functions: Hot Start, Arc Force, and VRD.
5.3 Memory Function (Save & Recall)
The TIG-200L allows you to save and recall up to 10 custom welding parameter sets.
- To Save: Adjust all desired parameters for a specific welding task. Press the "SAVE" button. Use the central knob to select a memory slot (1-10), then press "SAVE" again to confirm.
- To Recall: Press the "RECORD" button. Use the central knob to select the desired memory slot. Press "RECORD" again to load the saved parameters.

Figure 5.4: Utilizing the memory function to save and recall welding settings.
5.4 Material Compatibility
The TIG-200L is suitable for welding a variety of materials:
- Stainless Steel
- Carbon Steel
- Copper
- Mild Steel
- Sheet Metal
- Round Tube
- Square Pipe
Important Note: For aluminum and magnesium welding, an AC TIG welder (such as the AZZUNO ACDC-200) is recommended, as the TIG-200L is a DC-only TIG machine.

Figure 5.5: Examples of materials suitable for welding with the TIG-200L.
6. Maintenance
Regular maintenance ensures the longevity and optimal performance of your welding machine.
6.1 Daily Maintenance:
- Clean the welding torch and ground clamp to remove spatter and debris.
- Check all cables and connections for wear, damage, or loose fittings.
- Inspect the tungsten electrode for proper sharpening and condition. Replace ceramic cups and collets as needed.
6.2 Weekly/Monthly Maintenance:
- Clean the exterior of the welder with a dry, soft cloth.
- Use compressed air to blow out dust and debris from the ventilation openings. Ensure the machine is unplugged before doing so.
- Check the gas hose for leaks or damage.
6.3 Storage:
Store the welder in a clean, dry environment, away from direct sunlight, moisture, and corrosive substances. Protect it from dust and extreme temperatures.
7. Troubleshooting
This section provides solutions to common issues you might encounter. For problems not listed here, contact customer support.
| Problem | Possible Cause | Solution |
|---|---|---|
| Welder does not power on. | No power supply; loose connection; tripped circuit breaker. | Check power cord, outlet, and circuit breaker. Ensure power switch is ON. |
| No arc in TIG mode. | No gas flow; poor ground connection; incorrect tungsten setup; machine in wrong mode. | Check gas supply and flow rate. Ensure ground clamp is secure. Verify tungsten is correctly installed and sharpened. Confirm TIG mode is selected. |
| Poor weld quality (porosity, weak weld). | Insufficient gas shielding; contaminated workpiece; incorrect parameters; improper technique. | Increase gas flow. Clean workpiece thoroughly. Adjust welding current, pulse settings, and travel speed. Practice welding technique. |
| Electrode sticks in Stick mode. | Low welding current; incorrect electrode type; poor arc force setting. | Increase welding current. Use appropriate electrode for material. Adjust Arc Force setting. |
| Overheat indicator active. | Exceeded duty cycle; blocked ventilation. | Allow machine to cool down. Ensure ventilation openings are clear. Reduce welding time or current. |
8. Technical Specifications
Below are the technical specifications for the AZZUNO TIG-200L welding machine.
| Feature | Specification |
|---|---|
| Model | TIG-200L |
| Input Voltage | 110V & 220V Dual Voltage (50/60Hz) |
| Welding Modes | DC HF TIG, Pulsed HF TIG, COLD TIG, SPOT TIG, STICK (MMA) |
| Max Output Current | 200 Amps |
| Item Weight | 20.2 pounds (approx. 9.16 kg) |
| Package Dimensions | 17.53 x 13.91 x 12.57 inches (approx. 44.5 x 35.3 x 31.9 cm) |
| Manufacturer | AZZUNO |
| Protection Class | IP21S |
| Insulation Class | H |

Figure 8.1: Detailed electrical specifications for the TIG-200L model.
9. Warranty and Customer Support
AZZUNO products are manufactured to high-quality standards. For specific warranty details, please refer to the warranty card included with your product or contact AZZUNO customer support directly.
Customer Support:
If you have any questions, require technical assistance, or need to report an issue, please contact AZZUNO customer support through the retailer where you purchased the product or visit the official AZZUNO website for contact information.
Online Resources: For additional information, tutorials, and product updates, please visit the AZZUNO Brand Store on Amazon.