Battery Charger: VAS5900 SERVICE CHARGE
Special tools and workshop equipment required
- Battery Charger: VAS5900
Risk of injury! Pay attention to all warnings and safety precautions. Refer to WARNINGS AND SAFETY PRECAUTIONS .
"Service charging" is not permitted for VW vehicles, because voltage surges can damage the on-board electronics.
The Battery -A- must always be disconnected from the vehicle electrical system when using the "service charge" mode.
Do not check or charge a Battery -A- when the visual indicator has >>no color or is bright yellow<<. Do not give a jump start.
There is a risk of explosion during testing, charging or jump starting.
These Batteries -A- must be replaced.
Always set the mode that corresponds to the Battery -A- during the charging process. Refer to the : VAS5900 Operating Instructions.
"Service Charging" is suitable for:
- Wet batteries having a visual indicator which allows charging (visual indicator black or green).
The "Service charge (SERV)" mode is only used with sulfated Batteries -A-. The Battery -A- with voltages greater than 14.4 V is charged. A partial removal of the sulfation layer can result from this. Check the visual indicator after charging, immediately before the Battery -A- is used. Refer to COLOR DISPLAY (VISUAL INDICATOR) IN BATTERY COVER, CHECKING .
The Battery -A- temperature must be at least 10 °C (50 °F).
Procedure
-- Turn off the ignition and all electrical equipment and remove the ignition key.
-- Connect the Battery Charger: VAS5900 to the power supply. The last selected mode is shown on the display. Refer to Battery Charger .
-- Adjust the battery type with the INFO button.
The symbol -1- for "service charge of wet batteries" or the symbol -2- for "service charge of Gel/Absorbent Glass Mat (AGM) batteries" is indicated in the display.
-- Set the battery capacity (Ah) on the Battery -A- to be charged with the corresponding ↑ button or ↓ button.
-- Connect the red charge terminal (+) to the positive terminal of the Battery -A-.
On 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 when it is connected to the Battery -A- negative terminal.
-- Connect the black charge terminal (-) to the negative terminal of the Battery -A- / negative connector.
The : VAS5900 recognizes the nominal voltage of the connected Battery -A- (6 V/12 V/24 V) and begins the charging process automatically.
The : VAS5900 begins the "final charging" when the charge level is approximately 80 to 85 % of the battery voltage. The fourth bar is indicated on the display -1-. The Battery -A- is now ready to be used.
A successful "service charge" depends on the degree of sulfation on the Battery -A-.
Possible Malfunctions and How They Are Handled
- Displayed Voltage Does Not Match the Nominal Voltage:
-- Hold down the ↑ button or ↓ button until the charging process begins.
- Displayed Battery Voltage Does Not Match the Nominal Voltage - the Charging Process Has Already Begun:
-- Press the START/STOP button twice.
-- Hold down the ↑ button or ↓ button until the charging process begins.
- The Charger Does Not Recognize a Battery -A-, When the Battery Voltage Is Less Than 2 V:
The display remains unchanged.
The set operating mode and Ampere-hours (Ah) are displayed.
Battery -A- Charging, Ending
-- Press the START/STOP button.
-- Remove the charging clamps from the battery terminal clamps.
-- Disconnect the Battery Charger: VAS5900 from the power.