1. Introduction
This manual provides essential information for the safe and effective operation, maintenance, and troubleshooting of your JASIC ZX7 series Manual Arc Welding Machine. Please read this manual thoroughly before using the equipment to ensure proper function and safety.
The JASIC ZX7 series includes models ZX7-400D, ZX7-250D, and ZX7-315D, designed for portable light industry inverter DC manual arc welding (MMA). These machines feature network voltage adaptability, current self-matching, and an intelligent fan system for energy efficiency and noise reduction.
2. Safety Information
WARNING: Welding can be dangerous. Always follow safety precautions to prevent injury or death.
- Always wear appropriate personal protective equipment (PPE), including a welding helmet with proper shade, flame-resistant clothing, welding gloves, and safety shoes.
- Ensure adequate ventilation in the work area to avoid inhaling welding fumes.
- Protect bystanders from arc rays and hot metal.
- Never weld near flammable materials or in explosive atmospheres.
- Ensure the welding machine is properly grounded.
- Do not touch live electrical parts.
- Disconnect power before performing any maintenance or service.
- Keep children and unauthorized personnel away from the welding area.
- Use only genuine replacement parts and accessories.
3. Product Overview
The JASIC ZX7 series welding machines are compact, portable, and designed for efficient manual arc welding. Key features include:
- Network Voltage Adaptive & Current Self-Matching: Full network connection with arbitrary wiring (single-phase 220/380V, three-phase 380V). Ultra-wide network voltage adaptation range (140V-510V).
- Unified Manual Welding: Manual welding with unified adjustment, allowing selection of electrode diameter and self-matching welding parameters.
- Strong Output Capability: High no-load voltage. ZX7-250D and ZX7-315D models can extend welding handle wire by 50 meters, stably welding 3.2mm and 4.0mm welding rods respectively. The industrial-grade version can extend up to 100 meters for 5.0mm welding rods.
- Long Line Adaptive Thrust: Thrust current is not affected by cable length and diameter.
- Generator Compatibility: Compatible with most generators on the market.
- Intelligent Fan: Energy-saving and noise reduction, reduces dust entry, and extends fan life.
- Portable Design: Lightweight and easy to transport for various applications.
3.1 Components
The front panel features a digital display for current, a control knob for adjustments, and positive/negative output terminals for welding cables.
The rear panel includes the power input connection, cooling fans for heat dissipation, and a circuit breaker for protection.
4. Specifications
The following table details the technical specifications for the JASIC ZX7 series welding machines:
| Parameter | ZX7-400D (Z290II) | ZX7-250D (Z25II) | ZX7-315D (Z26II) |
|---|---|---|---|
| Input Voltage (V) | Single phase AC220 ± 15%, Single phase AC380 ± 15%, Three phase AC380 ± 15% | Single phase AC220 ± 15%, Single phase AC380 ± 15%, Three phase AC380 ± 15% | Single phase AC220 ± 15%, Single phase AC380 ± 15%, Three phase AC380 ± 15% |
| Rated Input Capacity (kVA) | 8 (AC220), 8.8 (AC380 single), 11.5 (AC380 three) | 8 (AC220), 8.8 (AC380 single), 11.5 (AC380 three) | 7.9 (AC220), 11.3 (AC380 single), 9.3 (AC380 three) |
| Power Factor | 0.77 (AC220), 0.7 (AC380 single), 0.85 (AC380 three) | 0.77 (AC220), 0.7 (AC380 single), 0.85 (AC380 three) | 0.77 (AC220), 0.7 (AC380 single), 0.85 (AC380 three) |
| Rated No-Load Voltage (V) | 75 | 65 (AC220), 59 (AC380 single), 65 (AC380 three) | 65 (AC220), 60 (AC380 single), 60 (AC380 three) |
| Welding Current (A) | 40-190 (AC220), 40-190 (AC380 single), 40-270 (AC380 three) | 20-160 (AC220), 20-200 (AC380 single), 20-200 (AC380 three) | 20-180 (AC220), 20-230 (AC380 single), 20-230 (AC380 three) |
| Thrust Current (A) | 0-60 | 0-100 | 0-100 |
| Thermal Arc Current (A) | 0-60 | 0-100 | 0-100 |
| Rated Load Duration Rate @ 40°C | 30% | 20% | 25% |
| Efficiency | 85% | 85% | 85% |
| Protection Grade | IP21 | IP21 | IP21 |
| Insulation Level | H | H | H |
| Dimensions (mm) | 660*260*490 | 465*140*292 | 465*140*292 |
| Weight (kg) | 13.1 | 6.2 | 6.5 |
Standard Accessories: 2 quick plugs, 1 Allen wrench.
5. Setup
- Unpacking: Carefully remove the welding machine and all accessories from the packaging. Inspect for any damage during transit.
- Placement: Place the machine on a stable, level surface in a well-ventilated area, away from moisture, dust, and direct sunlight. Ensure there is sufficient space around the machine for cooling air circulation.
- Power Connection:
- Identify the correct input voltage for your model (Single phase AC220V, Single phase AC380V, or Three phase AC380V).
- Connect the power cable to the appropriate power supply. Ensure the power supply matches the machine's voltage requirements and is properly grounded.
- The machine features an ultra-wide network voltage adaptation range (140V-510V), but always strive for stable power input within the specified range.
- Welding Cable Connection:
- Insert the quick plugs of the welding cables into the corresponding positive (+) and negative (-) terminals on the front panel of the machine. Twist to secure.
- Connect the electrode holder to one cable and the work clamp (ground clamp) to the other.
- Attach the work clamp securely to the workpiece, ensuring good electrical contact.
- Electrode Selection: Choose an electrode with a diameter suitable for your welding task and material. The machine supports various electrode diameters, and its unified adjustment feature helps match welding parameters.
6. Operating Instructions
- Power On: Flip the main power switch on the rear panel to the "ON" position. The digital display on the front panel will illuminate.
- Set Welding Current: Use the control knob on the front panel to adjust the welding current (Amperage) according to the electrode size and material thickness. Refer to the display for the current setting.
- Start Welding:
- Position the electrode at the starting point of the weld.
- Strike an arc by lightly touching the electrode to the workpiece and quickly lifting it slightly to establish the arc.
- Maintain a consistent arc length and travel speed for a smooth weld bead.
- The machine's "Long line adaptive thrust" ensures stable arc performance even with extended welding cables.
- Monitor Performance: The intelligent fan system will operate to cool the machine during use, reducing noise and extending component life.
- Power Off: After welding, turn off the machine using the main power switch. Disconnect welding cables and store them properly.
The JASIC ZX7 series is designed for clean and efficient welding with minimal spatter.
7. Maintenance
Regular maintenance ensures the longevity and optimal performance of your welding machine.
- Cleaning:
- Periodically clean the exterior of the machine with a dry, soft cloth.
- Use compressed air to blow out dust and debris from the cooling vents and internal components. Ensure the machine is powered off and unplugged before cleaning.
- The intelligent fan helps reduce dust entry, but regular cleaning is still recommended.
- Cable Inspection: Regularly inspect welding cables, electrode holder, and work clamp for any signs of damage, fraying, or loose connections. Replace damaged components immediately.
- Terminal Check: Ensure all electrical connections, especially the quick plugs, are tight and free from corrosion.
- Storage: When not in use, store the welding machine in a clean, dry environment, protected from extreme temperatures and humidity.
8. Troubleshooting
This section provides solutions to common issues you might encounter.
| Problem | Possible Cause | Solution |
|---|---|---|
| Machine does not power on | No power supply; loose power cable; tripped circuit breaker | Check power outlet; ensure power cable is securely connected; reset circuit breaker on machine or main panel. |
| No welding arc | Loose welding cables; poor work clamp connection; incorrect current setting; wet or faulty electrode | Check all cable connections; ensure work clamp has good contact; adjust current; replace electrode. |
| Unstable arc or excessive spatter | Incorrect current/voltage; improper arc length; contaminated workpiece; wrong electrode type | Adjust current/voltage; maintain proper arc length; clean workpiece; use correct electrode. |
| Overheating protection activated | Exceeded duty cycle; insufficient ventilation; clogged cooling vents | Allow machine to cool down; ensure proper ventilation; clean cooling vents. |
If the problem persists after attempting these solutions, please contact customer support.
9. User Tips
- For optimal performance, ensure your power supply is stable and within the recommended voltage range, even with the machine's wide adaptation capabilities.
- When welding with longer cables, the machine's long line adaptive thrust helps maintain arc stability, but always ensure cable integrity.
- Take advantage of the unified adjustment feature to quickly set parameters based on your chosen electrode diameter.
- Regularly check the cooling fans for obstructions to ensure efficient heat dissipation and prolong machine life.
10. Warranty and Support
The JASIC ZX7 series welding machines come with a 1-year warranty from the date of purchase. This warranty covers manufacturing defects and malfunctions under normal operating conditions.
For technical support, warranty claims, or service inquiries, please contact your authorized dealer or the manufacturer directly. Provide your product model and serial number when contacting support.
Manufacturer: Shenzhen Jialianda Welding Equipment Co., Ltd.
Contact Information (for reference, please use official channels for direct support):
- Sales Manager: Miracle Gu
- Wechat: MiracleGuJR
- WhatsApp: +86 13618470155
- Email: 767910374@qq.com
- Mobile: +86 13618470155
Please note that contact information provided here is for general inquiry and may not be the primary channel for official support or warranty claims. Always refer to your purchase documentation for specific support contacts.
11. Certifications
The manufacturing facility for JASIC welding equipment holds the following certifications, ensuring quality and adherence to international standards:
- Occupational Health and Safety Management Systems: GB/T45001-2020/ISO 45001:2018
- Quality Management Systems: GB/T19001-2016/ISO9001:2015
- Environmental Management Systems: GB/T24001-2016/ISO14001:2015
