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Volkswagen Golf Service & Repair Manual: Charging totally discharged batteries with battery charger -VAS 5900-

Volkswagen Golf Service & Repair Manual / Electrical system, general information / Starter- current supply- CC / Charging battery / Charging totally discharged batteries with battery charger -VAS 5900-

Danger of injury! Observe warning notices and safety regulations → Chapter!
It is not permissible to test or charge batteries whose magic eye shows light yellow. Do not slave/jump start the vehicle!
Danger of explosion when checking and charging or slave/jump starting.
These batteries must be renewed.
The terminal polarity protection in operating mode “charging totally discharged batteries/support mode” is not active. Connect battery charger terminal clamps correctly to battery terminals.
When charging always set the battery charger to the correct type of battery → operating instructions for battery chargerVAS 5900!
Totally discharged battery is not recognised by battery charger → Chapter.
Do not press START / STOP button when charger unit cables are connected incorrectly. The charger unit may be damaged.
Batteries with a voltage of less than 2 volts will not be recognised automatically by battery charger -VAS 5900-.
Special tools and workshop equipment required
Battery charger -VAS 5900-
Observe notes in chapter → Chapter.
Totally discharged batteries in vehicles before registration must be exchanged prior to delivery. Preliminary damage cannot be excluded.
The battery must have a temperature of at least 10°C.
–  Switch off ignition and all electrical consumers.
–  Connect charger plug to battery charger. The last selected operating mode will appear on display → Chapter.

Charging totally discharged batteries with battery charger -VAS 5900-

–  Set battery to respective battery type with INFO.
In the display, the symbol -1- for “Service charge for wet batteries” or symbol -2- for “Service charge for gel/absorbent glass mat batteries” will appear.
–  Set battery capacity (Ah) of battery for charging using respective button “Up”↑ or “Down”↓.
–  Connect red terminal clamp “+” to positive terminal on battery.
In vehicles with start/stop function and battery monitor control unit -J367- fitted, black terminal clamp must be connected to body earth. Connecting it to battery negative terminal will cause start/stop system to malfunction.
–  Connect black terminal clamp “-” to negative terminal.
–  Press START / STOP for approx. 5 seconds. The menu “charging totally discharged batteries/support mode” will be activated.
–  Press respective button “Up”↑ or “Down”↓ to set respective battery voltage (6 V, 12 V or 24 V).
If a button is not pressed within 5 seconds the charger will return to the main menu (select operating mode).
–  Confirm the selected battery voltage with START / STOP.
Then follows the enquiry for "is charger cable terminal polarity correct".
–  Check polarity of charger unit cables.
–  Confirm polarity of charger unit cables with START / STOP.
Charger will start charging sequence for totally discharged battery.
Ending battery charging sequence:
–  Press START / STOP.
–  Disconnect black terminal clamp “-” of charger from negative terminal.
–  Disconnect red terminal clamp “+” of charger from positive terminal on battery.
–  Pull charger plug out of battery charger.

Charging totally discharged batteries with battery charger -VAS 5900-

Charging battery in service mode with battery charger -VAS 5900-
  WARNING Danger of injury! Observe warning notices and safety regulations → Chapter! ...

Charging battery in support mode with battery charger -VAS 5900-
General notes: The support mode provides the onboard supply with power when the battery is removed or disconnected. For furthe ...

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