Refresh Charging
Battery Charger VAS 5903
CAUTION!
Risk of injury. Observe warning notes and safety precautions => [ Dangers When Working with Batteries ] Dangers When Working with Batteries!
CAUTION!
Do not check or charge a battery when the visual indicator has no color or is bright yellow. Jump starting must not be used!
There is a risk of explosion during testing, charging or jump starting.
The battery must be replaced.
• Refer to the Operating Instructions that came with the Battery Charger (VAS 5903).
• Battery Charger (VAS 5903) unit description, refer to => [ Battery Charger VAS 5903 ] Battery Charger VAS 5903.
• Charge the battery, refer to => [ Battery, Charging ]. Battery, Charging
• Refresh charging, refer to => [ Refresh Charging ].
• Charging a severely discharged battery, refer to => [ Severely Discharged Battery, Charging ]. Severely Discharged Battery, Charging
• Support mode, refer to=> [ Support Mode ]. Support Mode
• Maintenance charging, refer to => [ Maintenance Charging ]. Maintenance Charging
Refresh Charging
Special tools, testers and auxiliary items required
• Battery Charger (VAS 5903)
CAUTION!
Risk of injury. Observe warning notes and safety precautions => [ Dangers When Working with Batteries ] Dangers When Working with Batteries!
CAUTION!
Do not check or charge a battery when the visual indicator has no color or is bright yellow. Jump starting must not be used!
There is a risk of explosion during testing, charging or jump starting.
The battery must be replaced.
CAUTION!
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.
CAUTION!
Always set the operating mode that corresponds to the battery. Refer to the Operating Instructions for battery charger VAS 5903.
Refresh Charging is suitable for wet batteries, which must be filled 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). The battery is then charged to the maximum specific gravity of the electrolyte and the plates are reactivated (removal of sulfation layer).
• The battery temperature must be minimum 10 °C.
Perform the following work:
- Turn off the ignition and all electrical consumers.
- Connect the battery charger (VAS 5903). The last selected operation mode is shown on the display, refer to => [ Battery Charger VAS 5903 ] Battery Charger VAS 5903.
- Press the INFO button to select the battery type.
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 battery capacity (Ah) on the battery to be charged with the corresponding [Up Arrow] or [Down Arrow] button.
- Attach the red charging clamp (+) to the battery positive terminal.
• In the case of vehicles with a start/stop function and an installed Battery Monitoring Control Module (J367), the black charge terminal - must be connected to the body ground. The start/stop system will malfunction if it is connected to the negative terminal on the battery.
- Connect the black charging clamp (-) to the negative terminal on the battery/negative connector.
The (VAS 5903) recognizes the nominal voltage of the connected battery (6 V/ 12 V /24 V) and begins the charging process automatically.
At a charge condition of approximately 80 - 85% of the battery voltage, the (VAS 5903) begins the final charging. The fourth bar is indicated on the display - 1 -. The battery is ready for operation.
• The refresh charging process depends on the degree of sulfation on the battery.
Possible malfunctions and how they are handled:
1 - Displayed voltage does not match the nominal voltage:
- Hold down the [Up Arrow] or [Down Arrow] button until the charging process begins.
2 - Displayed battery voltage does not match rated voltage - charging process has already begun:
- Press the START/STOP button two times.
- Hold down the [Up Arrow] or [Down Arrow] button until the charging process begins.
3 - The charger does not recognize a battery, when the battery voltage is less than 2 V:
The display remains unchanged.
The set operating mode and Ampere-hours (Ah) are displayed.
End the battery charging process
- Press START/STOP button.
- Remove the charger clamps from the battery terminals.
- Disconnect the (VAS 5903).