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

WARNING

Danger of injury! Observe warning notices and safety regulations → Chapter!

WARNING 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.

Caution 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-

Note

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.

Note 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).

Note 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-