This manual provides safety instructions, installation, operation, maintenance, and troubleshooting for the Huayuan ZX7-400/500/630HD inverter DC arc…
The Huayuan ZX7-400/500/630HD inverter DC arc welding machine is designed for manual metal arc welding with low‑hydrogen electrodes on low‑carbon and medium‑carbon steels. The user manual covers the machine’s main uses, technical specifications, structure, and system operation.
Key sections include safety precautions, storage and handling, installation and adjustment, detailed operating procedures, maintenance guidelines, and a troubleshooting guide with common fault tables. The document also lists accessories and provides wiring diagrams for service technicians. This manual is written in Chinese.
| Input voltage | 3–380 V ±15% / 50 Hz |
|---|---|
| Rated input capacity (kVA) | 16.5 kVA (ZX7‑400), 25 kVA (ZX7‑500), 34 kVA (ZX7‑630) |
| Rated input current (A) | 25 A (ZX7‑400), 38 A (ZX7‑500), 52 A (ZX7‑630) |
| Rated welding current (A) | 400 A (ZX7‑400), 500 A (ZX7‑500), 630 A (ZX7‑630) |
| Rated welding voltage (V) | 36 V (ZX7‑400), 40 V (ZX7‑500), 44 V (ZX7‑630) |
| Load duty cycle | 60 % (10 min work / 4 min rest) |
| Dimensions (L×W×H, mm) | 570 × 290 × 530 mm (ZX7‑400) |
| Weight | 38 kg (ZX7‑400), 39 kg (ZX7‑500), 42 kg (ZX7‑630) |
| Operating temperature range | -10 °C to +40 °C (working), -25 °C to +55 °C (storage) |
Read the manual carefully, avoid placing the machine on an inclined surface, do not use it in rain, ensure proper grounding, and wear protective clothing, gloves, and eye protection.
The ZX7‑500HD model has a rated welding current of 500 A.
Store it in a dry, ventilated place away from direct sunlight or rain, within the specified temperature and humidity limits.
When the overheat indicator lights, the power unit has overheated and must be stopped until the temperature drops before resuming operation.