Refresh Charging With Battery Charger

Refresh Charging With Battery Charger

CAUTION:
- Risk of injury. Observe warning notes and safety precautions.
- Batteries that have a colorless or light yellow visual indicator must not be tested or charged. Jump starting must not be used
- There is a risk of explosion during testing, charging or jump starting.
- These batteries must be replaced.
- Refresh charging" is not permitted for VW vehicles, because voltage surges can damage the on-board electronics.
- If "Refresh charging" is still used, the battery must always be separated from the vehicle electrical system.
- During the charging process, always set the operation mode corresponding with the battery operation instructions for battery charger VAS 5903
- Refresh charging" is suitable for:
- Wet batteries, that can be topped up with distilled water.

- Do not use "Refresh charging" on maintenance-free wet batteries.

"Refresh charging (Refr)" is only used on batteries that are possibly defective (e.g. sulfation). Thereby the battery is charged to the maximum specific gravity of electrolyte and the plates are reactivated (removal of sulfation layer).

Special tools, testers and auxiliary items required
- Battery Charger VAS 5903 VAS 5900

NOTE: The battery temperature must be at least 10 degrees C.

- Turn off the ignition and all electrical consumers.
- Plug in the electrical system connector of the charger. The last selected operation mode is shown on the display.







- Using INFO, set the mode of operation that corresponds with the battery.

The symbol - 1 - for "Refresh charging of wet batteries" or the symbol - 2 - for "Refresh charging of Gel/AGM batteries" is indicated in the display.

- Set the capacity (Ah) of the battery to be charged with the corresponding button "Up" arrowup or "Down" downarrow.
- Clamp the red charging clamp "+" to the positive battery terminal.
- Clamp the black charging clamp "-" to the negative battery terminal.

The charger recognizes the nominal voltage of the connected battery (6 V, 12V, or 24 V) and begins the charging process automatically.







At a charge condition of approximately 80 - 85 % battery voltage, charging unit begins the "Final-charging" The fourth bar is indicated on the display - 1 - The battery is ready for operation.

NOTE: The "Refresh charging" process is dependent on the degree of sulfation of the battery.

Possible malfunctions and how they are handled:
1 Displayed voltage does not match the nominal voltage: Hold the appropriate button Up (UP arrow) or Down (Down arrow), until the charging process begins. Displayed battery voltage does not match rated voltage - charging process has already begun: Press START / STOP twice. Hold the appropriate button Up (UP arrow) or Down (Down arrow) until the charging process begins. The charger does not recognize a battery, when the battery voltage is less than 2 V: The display remains unchanged. The selected operation mode and Ampere hours (Ah) are displayed.

End battery charging process:
- Press START / STOP
- Remove the black charging clamp "-" of the charger from the negative battery terminal.
- Remove the red charging clamp "+" of the charger from the positive battery terminal.
- Pull out the electrical system connector of the charger.