Troubleshooting, Safety and Maintenance Guide for the Hyundai HYJS-950 All In One Jump Starter With Air Compressor, LED Light and USB Charging

Troubleshooting, Safety and Maintenance

1. Pre-Jumpstart Preparations

• Check the Battery Type:
  Confirm that the vehicle has a 12V lead-acid battery. The HYJS-950 is only designed for this type of battery.
  Never attempt to jump-start a vehicle with a non-rechargeable or defective battery, as it may damage both the jump starter and the vehicle's electrical system.

• Ensure Adequate Ventilation:
  Lead-acid batteries generate explosive gases during charging. Always perform jump-starting operations in a well-ventilated area to reduce the risk of explosions and ensure safety.

• Emergency Use Only:
  The HYJS-950 is designed for emergency use only. Avoid frequent commercial use to prevent excessive wear and tear, which could reduce the lifespan of the unit.

• Battery Capacity Check:
  If the HYJS-950’s battery capacity is below 30%, do not attempt to jump-start the vehicle. Low charge may result in insufficient power, leading to an unsuccessful jump-start or damage to the unit. Charge the unit fully before use.

• Turn Off Vehicle Accessories:
  Turn off the vehicle ignition and any accessories such as radios, lights, air conditioning, and electronic devices to avoid drawing excessive power while jump-starting.

2. Personal Safety Precautions

• Remove Jewelry:
  Remove rings, watches, bracelets, and necklaces to avoid short circuits, which can lead to severe burns or injury.

• Avoid Contact with Eyes and Skin:
  Battery acid can cause serious injury, including permanent blindness. Be cautious and avoid touching your face or eyes when working near the battery. If you come into contact with battery acid, flush the area immediately with water and seek medical attention.

• Avoid Sparks and Flames:
  Never smoke, light a match, or cause sparks near the vehicle or battery. Lead-acid battery gases are highly flammable and could ignite if exposed to a flame or spark.

3. Connection Process for Jump-Starting

• Correct Placement of HYJS-950:
  Position the jump starter as far away from the battery as possible, ensuring no accidental contact with any metal surfaces or battery terminals. Always place the unit on a stable surface to prevent tipping.

• Battery Clamp Safety:
  Always secure the clamps in their designated holders when not in use to avoid accidental short circuits or electrical hazards. Never let the clamps touch together or contact any metal surface while connected to prevent sparks or arcing.

4. Connecting the Cables

• Connect the Positive Cable First:
  Attach the red (positive) clamp to the positive terminal of the vehicle's battery.

• Connect the Negative Cable Last:
  Attach the black (negative) clamp to a grounded metal part on the vehicle (not the battery's negative terminal) to avoid sparks near the battery.

• Double-Check the Connections:
  Ensure the clamps are securely attached to both the jump starter and the vehicle's battery terminals. Verify that no wires are exposed or prone to touching each other.

5. Jump-Starting the Vehicle

• Activate the Jump Starter:
  Turn on the HYJS-950 to begin transferring power to the vehicle battery.

• Monitor the Battery:
  Check that the jump starter’s indicators show proper power flow and no signs of overheating or damage during the process.

• Start the Vehicle:
  Attempt to start the vehicle’s engine. If it doesn’t start after a few attempts, turn off both the jump starter and the vehicle. Double-check connections and the battery’s condition.

6. Disconnecting the Cables

• Remove the Negative Clamp First:
  After the vehicle starts, turn off the jump starter and remove the black (negative) clamp from the grounded metal part.

• Remove the Positive Clamp:
  Finally, disconnect the red (positive) clamp from the battery terminal.

• Store the Cables Safely:
  Securely return the clamps to their designated storage areas on the jump starter to prevent accidental short circuits.

7. Post-Jumpstart Checks

• Inspect for Damage:
  After use, inspect the HYJS-950 for any visible damage (e.g., cracks, loose cables, or corrosion). If performance decreases or damage is suspected, have it inspected or repaired by the manufacturer or an authorized technician.

• Proper Disposal of Old or Damaged Units:
  The unit contains a sealed, non-spillable lead-acid battery. Dispose of the unit properly by contacting a local recycling center. Do not dispose of it in regular trash to prevent environmental harm.

8. General Maintenance and Troubleshooting

• Inspect Cables and Clamps Regularly:
  Check the jumper cables and clamps for signs of wear, damage, or corrosion. Replace any parts showing fraying, cracking, or other issues.

• Recharge the Jump Starter Regularly:
  Keep the HYJS-950 charged so it’s always ready for use. Charge it once a month even if not in use to maintain its internal battery and prevent capacity loss.

• Avoid Wet or Harsh Conditions:
  Keep the unit dry and never expose it to rain or wet conditions. If it gets wet, ensure it’s thoroughly dried before use.

• Check for Electrical Issues:
  If the jump starter shows no power or unusual behavior (e.g., sparks, overheating), consider having it inspected or repaired. Never attempt to open or repair the unit yourself to avoid voiding the warranty or causing injury.

9. Charging and Battery Maintenance

• Initial Charge:
  Fully charge the unit immediately after purchase, even though it’s partially charged from the manufacturer. This ensures it’s ready for use.

• Recharging After Each Use:
  Always recharge the unit after each jump-start to maintain the internal battery's performance and longevity.

• Recharge Regularly (Even if Not Used):
  Charge the unit at least once a month even if it hasn’t been used. This prevents the battery from losing capacity over time.

• Avoid Simultaneous Charging and Discharging:
  Do not charge and discharge the unit at the same time, as it could cause excessive heat buildup and potentially damage the battery.

10. Checking Battery Charge Level

• Battery Voltage and % Indicator:
  Press the Battery Voltage and % Indicator button to check the unit’s charge status. The display will show the remaining charge percentage.

• Best Time to Check the Battery:
  For an accurate reading, check the battery’s charge after the unit has been disconnected from all devices and chargers for a few hours.

• Recharge if Below 100%:
  If the battery charge is below 100%, recharge it immediately to maintain optimal performance.

11. Charging Methods

• AC Charging (Wall Socket):

  • Insert the AC adapter into the charging jack of the jump starter.
  • Plug the other end into a wall socket.
  • Monitor the charging status and disconnect the charger once fully charged to avoid overcharging.

• DC Charging (Using Vehicle’s Power Outlet):

  • Use a male-to-male charger cable to charge the unit via the 12V DC outlet in your vehicle.
  • Turn the vehicle engine on to power the DC outlet and insert the cable into the jump starter’s charging port.
  • Periodically monitor the charge status using the Battery Voltage and % Indicator button.
  • Important: DC charging overrides maintain mode, so monitor closely and disconnect once fully charged to prevent overcharging.

12. Troubleshooting Tips for Charging Issues

• Unit Not Charging or Displaying Low Battery:

  • Ensure the charging cables are securely connected and the power source (AC or DC) is functional.
  • If using DC charging, ensure the vehicle engine is on to power the 12V outlet.

• Battery Charge Percent is Inaccurate:

  • Wait a few hours after disconnecting the unit from all chargers to get the most accurate reading.
  • If the reading remains inaccurate after a full charge, reset the unit or contact the manufacturer for assistance.

• Overcharging During DC Charging:

  • If you suspect overcharging, disconnect the DC charger immediately once the unit is fully charged.

13. Long-Term Maintenance Tips

• Storage and Charging:
  Store the unit in a cool, dry place to prevent damage. Keep the jump starter charged at least once a month, especially if not in regular use.

• Battery Care:
  Recharge the unit periodically if not used for extended periods to prevent deep discharge, which can shorten the battery’s lifespan.

• Cleaning the Unit:
  Keep the unit clean using a dry cloth to wipe down the exterior. Avoid using water or harsh chemicals near the charging ports.

14. Safety Precautions

• Avoid Overcharging:
  Never leave the unit plugged in after it’s fully charged. Overcharging can damage the battery and reduce its overall life.

• Monitor for Overheating:
  During both AC and DC charging, check for signs of overheating. If the unit becomes too hot, disconnect it immediately and let it cool down.

• Storage While Not in Use:
  Store the unit in a safe, dry area and continue the monthly charging routine to maintain battery health.

By following these steps, you’ll ensure the safe and efficient operation of the HYJS-950 Jump Starter, maintaining both the unit’s functionality and longevity. If you encounter any issues, you can troubleshoot using the tips above.

If you need any spare parts for your HYJS-950, please take a look at our page: https://power-spares.co.uk/

For further assistance, call our aftersales team on 01646687880.

For more information, helpful hints and tips, visit the Hyundai Power Equipment website: hyundaipowerequipment.co.uk