Volkswagen Golf Service & Repair Manual: Charging battery 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.

Special tools and workshop equipment required

Battery charger -VAS 5900-

Note

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 type of battery selected will appear on display.

Charging battery with battery charger -VAS 5900-

Set battery to respective operating mode with INFO.

In the display the symbol -1- for “standard charge for wet batteries” or symbol -2- for “standard 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.

The charger unit recognises the voltage required for the connected battery (6 V, 12 V or 24 V) and initiates the charging sequence.

At a charge condition of approx. 80 - 85% the battery charger switches to the “final charge” mode. The fourth bar appears in display -1-. The battery is ready for use.

At a charge condition of 100% all bars appear in display.

Note In the battery type “standard charge” the parallel use of consumers while charging is possible. The charging period will be longer. The battery charger will switch to maintenance mode after about 1-7 hours, depending on type of battery. To achieve a 100% charge the battery should remain connected for this period.

Possible faults and fault rectification:

1 -	Displayed battery voltage is not as per nominal voltage:

Press respective button “Up”↑ or “Down”↓ until charging sequence starts.

2 -	Displayed battery voltage is not as per nominal voltage – charging sequence already started:

Press START / STOP twice.
Press respective button “Up”↑ or “Down”↓ until charging sequence starts again.

3 -	Battery charger does not detect a battery, when battery voltage is less than 2 V:

Display remains unchanged.

The battery type and ampere hours (Ah) as set is displayed.

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 battery with battery charger -VAS 5900-