Xh-m608 Manual May 2026

Most XH-M608 manuals miss the fact that this board supports dual-pulse welding. This is crucial for welding to the negative terminal of a battery (which sinks heat quickly).

To enable Dual Pulse:

Pro Tip: Use single pulse for the positive terminal (cap) and dual pulse for the negative terminal (can). Xh-m608 Manual

The XH-M608 is a multifunctional automatic charge and discharge control module designed for lead-acid batteries. It features an intelligent voltage comparator that automatically connects the battery to a charger when the voltage drops too low, and disconnects it once full charge is reached. This prevents over-discharging and over-charging, significantly extending battery life.

The LED display shows real-time battery voltage. When P1 is reached, the decimal point on the LED will flash, indicating charging is active. Most XH-M608 manuals miss the fact that this

If your board is not firing, consult this diagnostic section of the XH-M608 manual.

| Symptom | Likely Cause | Solution | | :--- | :--- | :--- | | Screen is blank | No 12V power, or polarity reversed | Check VCC/GND wiring. The board has reverse polarity protection, but it may blow a fuse. | | Pulse light flashes, but no weld | MOSFET gate not connected to Pulse+/- | Wire the Gate of your FET board to Pulse+. Do not rely on shoddy jumper wires. | | Welds are burning holes | Pulse time is too high for nickel thickness | Reduce time to 1.5 ms and test on scrap metal. | | Welds are too weak (pop off) | Pulse time too low, or capacitor bank voltage sag | Increase time by 0.5 ms increments. Ensure caps are fully charged (5V-12V depending on build). | | Welder fires continuously | Trigger wires are shorted or encoder is stuck | Disconnect foot pedal. If problem persists, the MOSFET may be blown. | | Erratic timing / Screen flickers | 12V supply is unstable (cheap LED driver) | Use a regulated power supply or a small 12V lead-acid battery. | Pro Tip: Use single pulse for the positive

Common programmable parameters (may vary slightly by firmware version):

| Code | Meaning | Typical Range | |------|------------------------|------------------------| | P0 | Set temperature (SP) | -50 to +120°C | | P1 | Hysteresis (differential) | 0.1–15°C | | P2 | Control mode (heating/cooling) | H (heat) / C (cool) | | P3 | Calibration offset | -10 to +10°C | | P4 | Delay start (compressor protection) | 0–10 min | | P5 | High temperature alarm limit | up to 120°C | | P6 | Low temperature alarm limit | down to -50°C |

| Problem | Likely Cause | Solution | |---------|--------------|----------| | Display shows --- | No battery connected or voltage < 10V | Check battery voltage and wiring | | Relay chatters | Loose connection or insufficient current | Tighten terminals; ensure battery > 9V | | Does not stop charging | P2 set too high or charger voltage never reaches P2 | Lower P2 or adjust charger output | | Stops charging immediately | P1 and P2 too close | Increase difference (e.g., 12.0V / 14.0V) |