Battery Charger VAS 5903
Battery Charger VAS 5903
=> [ Battery, Charging ]
=> [ Refresh Charging ]
=> [ Charging Severely Discharged Battery ]
=> [ Support Mode ]
=> [ Maintenance Charging ]
Battery, Charging
Special tools, testers and auxiliary items required
• Battery Charger (VAS 5903)
Risk of injury. Observe warning notes and safety precautions. Refer to => [ Battery Safety Precautions ] Battery Safety Precautions and => [ Battery Safety Designation ] Battery Safety Designation!
Batteries that have a colorless or light yellow visual indicator do not have to 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.
• 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. Refer to => [ Battery Charger VAS 5903 ] Battery Charger VAS 5903.
- Using INFO, set the mode of operation that corresponds with the battery.
The symbol - 1 - for standard charge of wet batteries or the symbol - 2 - for standard charge of Gel/Absorbant Glass Mat (AGM) batteries is indicated in the display.
- Set the capacity (Ah) of the battery to be charged with the corresponding button Up ↑ or Down ↓.
- Clamp the red charging clamp + to the positive battery 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 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%, charging unit begins the Final-charging. The fourth bar is indicated on the display - 1 -. The battery is ready for operation.
With a charge status of 100%, all bars are indicated on the display.
• With the battery type standard charge, parallel operation of consumers during the charging process is possible. The charging time is lengthened by this.
• Depending on battery type, the charger switches over to sustain charging after approximately 1-7 hours. To achieve a 100% charge status, the battery should remain connected to the charger for that long.
Possible Malfunctions And How They Are Handled:
1 - Displayed voltage does not match the nominal voltage:
- Hold the appropriate button Up ↑ or Down ↓ until the charging process begins.
2 - Displayed Battery Voltage Does Not Match Rated Voltage - Charging Process Has Already Begun:
- Press START / STOP twice.
- Hold the appropriate button Up ↑ or Down ↓ until the charging process begins again.
3 - The Charger Does Not Recognize A Battery, When The Battery Voltage Is Less Than 2 V:
The display remains unchanged.
The selected battery type 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.
Refresh Charging
Special tools, testers and auxiliary items required
• Battery Charger VAS 5903 (VAS 5900)
Risk of injury. Observe warning notes and safety precautions. Refer to => [ Battery Safety Precautions ] Battery Safety Precautions and => [ Battery Safety Designation ] Battery Safety Designation!
Batteries that have a colorless or light yellow visual indicator do not have to 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. Refer to Operation instructions for battery charger!
Refresh charging is suitable for:
• Wet batteries, which can 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). Thereby the battery is charged to the maximum specific gravity of electrolyte and the plates are reactivated (removal of sulfation layer).
• 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. Refer to => [ Battery Charger VAS 5903 ] Battery Charger VAS 5903.
- Using INFO, set the mode of operation that corresponds with the battery.
The symbol - 1 - for refresh - charging wet batteries or the symbol - 2 - for refresh - charging of Gel/Absorbant Glass Mat (AGM) batteries is indicated in the display.
- Set the capacity (Ah) of the battery to be charged with the corresponding button Up ↑ or Down ↓.
- Clamp the red charging clamp + to the positive battery 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 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% of the battery voltage, charging unit begins the Final-charging. The fourth bar is indicated on the display - 1 -. The battery is ready for operation.
• 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 ↑ or Down ↓ until the charging process begins.
2 - Displayed Battery Voltage Does Not Match Rated Voltage - Charging Process Has Already Begun:
- Press START / STOP twice.
- Hold the appropriate button Up ↑ or Down ↓ 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 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.
Charging Severely Discharged Battery
Special tools, testers and auxiliary items required
• Battery Charger VAS 5903 (VAS 5903)
Risk of injury. Observe warning notes and safety precautions. Refer to => [ Battery Safety Precautions ] Battery Safety Precautions and => [ Battery Safety Designation ] Battery Safety Designation!
Batteries that have a colorless or light yellow visual indicator do not have to 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.
• The polarity protection of the charger clamps is not active in the operation mode "charging severely discharged batteries/Support mode". Connect the charger clamps to the battery terminals correctly according to polarity!
• During the charging process, always set the operation mode corresponding with the battery. Refer to Operation instructions for battery charger (VAS 5903)!
• The severely discharged battery is not recognized by the charger. Refer to => [ Severely Discharged Batteries ] Severely Discharged Batteries.
• Do not touch START / STOP if the charge clamps are connected incorrectly! The charger can be damaged.
It is not possible for the battery charger (VAS 5903) to automatically recognize batteries with voltage under 2 Volts.
• Observe the notes in chapter => [ Severely Discharged Batteries ] Severely Discharged Batteries.
• Severely discharged batteries in vehicles must be replaced prior to delivery. Pre-existing damage cannot be ruled out.
• 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. Refer to => [ Battery Charger VAS 5903 ] Battery Charger VAS 5903.
- Using INFO, set the mode of operation that corresponds with the battery.
The symbol - 1 - for service charge of wet batteries or the symbol - 2 - for service charge of Gel/Absorbant Glass Mat (AGM) batteries is indicated in the display.
- Set the capacity (Ah) of the battery to be charged with the corresponding button Up ↑ or Down ↓.
- Clamp the red charging clamp + to the positive battery 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 battery terminal.
- Press the START / STOP for approximately 5 seconds. The menu selection "Charging severely discharged batteries/Support mode" is activated.
- Press corresponding button Up ↑ or Down ↓, to set respective battery voltage (6 V, 12 V or 24 V).
• If no button is touched within 5 seconds, the charger will return to the main menu (operation mode selection).
- Confirm the selected battery voltage by pressing START / STOP.
Then the inquiry about the correct polarity of the charger clamps is made.
- Verify that the charger clamps are connected to the correct polarity.
- Confirm that the charger clamps are connected to the correct polarity by pressing START / STOP.
The charger begins charging the severely discharged battery.
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.
Support Mode
General Information:
The support mode provides the vehicle electrical system with voltage with the battery is removed or disconnected.
For more information, refer to VAS 5903 Operating Instructions.
The support mode is used for the following situations:
• Vehicle electrical system support mode with the battery not installed
• Maintaining the voltage when the battery is being replaced
• Testing without the battery
Risk of injury. Observe warning notes and safety precautions. Refer to => [ Battery Safety Precautions ] Battery Safety Precautions and => [ Battery Safety Designation ] Battery Safety Designation!
Batteries that have a colorless or light yellow visual indicator do not have to 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.
- Turn off the ignition and all electrical consumers.
• The polarity protection of the charger clamps is not active in the operation mode charging severely discharged batteries/Support mode. Connect the charger clamps to the battery terminals correctly according to polarity!
• It can result in sparks due to short circuit.
• This constitutes an explosion risk.
• Make sure the charger clamps are secure.
• Do not touch START / STOP if the charge clamps are connected incorrectly! The charger can be damaged.
- Remove the battery.
- Plug in the electrical system connector of the charger. The last selected operation mode is shown on the display. Refer to => [ Battery Charger VAS 5903 ] Battery Charger VAS 5903.
Whenever the battery is removed, be careful to prevent contact between the connected charge clamp on the positive terminal and the body ground. Likewise prevent contact between the battery terminals.
- Connect the red charging clamp + to the vehicle 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 vehicle negative terminal.
- Press the START / STOP for approximately 5 seconds. The menu selection "Charging severely discharged batteries/Support mode" is activated.
- Press corresponding button Up ↑ or Down ↓, to set respective battery voltage (6 V, 12 V or 24 V).
• If no button is touched within 5 seconds, the charger will return to the main menu (operation mode selection).
- Confirm the selected battery voltage by pressing START / STOP.
Then the inquiry about the correct polarity of the charger clamps is made.
- Verify that the charger clamps are connected to the correct polarity.
- Confirm that the charger clamps are connected to the correct polarity by pressing START / STOP.
The battery charger starts the battery support mode.
End the battery support mode:
- Press START / STOP.
- Remove the black charging clamp - of the charger from the negative battery terminal of the vehicle.
- Remove the red charging clamp + of the charger from the positive battery terminal of the vehicle.
- Pull out the electrical system connector of the charger.
Maintenance Charging
Risk of injury. Observe warning notes and safety precautions. Refer to => [ Battery Safety Precautions ] Battery Safety Precautions and => [ Battery Safety Designation ] Battery Safety Designation!
Batteries that have a colorless or light yellow visual indicator do not have to 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.
• If battery is discharged by an electrical consumer during charge retention, the (VAS 5903) automatically supplies the corresponding charge.
• Charge retention can be performed without time restrictions.
• The battery can be used constantly.
• Observe the maintenance notes of the battery manufacturer.
If the battery is fully charged, the (VAS 5903) begins to sustain the charge.
- Proceed as when charging the battery. Refer to => [ Battery, Charging ].
With a charge status of 100%, all bars are indicated on the display.