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Volkswagen Jetta / Bora: Electrical System Manual - part 5

Charging totally discharged battery with

battery charger -VAS 5095 A-

WARNING

Danger of injury! Observe warning notices and safety regula‐

tions

⇒ page 2

The charger unit automatically recognises totally discharged bat‐

teries and initiates a gentle charging procedure with a low charg‐

ing current. The charging current is automatically adapted to suit

the charge condition of the battery.

Note

♦

Observe notes in chapter

⇒ page 27

♦

The battery voltage must be at least 0.6 V.

– Charge battery

⇒ page 16

3.1.4

Charging battery in support mode with

battery charger -VAS 5095 A-

WARNING

Danger of injury! Observe warning notices and safety regula‐

tions

⇒ page 2

When in support mode the battery charger -VAS 5095 A- replaces

a defective vehicle battery whilst it is being exchanged. The on‐

board supply remains intact. The vehicles electrical equipment

(e.g. electric windows) can be used.
Special tools and workshop equipment required
♦ Battery charger -VAS 5095 A-

Caution

♦ Always set battery type 2.4 V/C (Volt/Cells) when in sup‐

port mode! This applies for all batteries.

♦ The battery charger -VAS 5095 A- terminal clamps must

remain in contact with the battery terminal clamps whilst

the battery is being exchanged.

Jetta 2005 ➤ , Bora 2006 ➤

3. Charging battery

⇒ page 15

“support mode”.

– Connect red terminal clamp “+” of charger unit to positive ter‐

minal of vehicle.

– Connect black terminal clamp “-” of charger unit to negative

terminal of vehicle.

– Check setting for battery type on type of battery switch

⇒ page 15

. Must be set to 2.4 V/C (Volt/Cells).

– Switch on battery charger

⇒ page 15

The yellow LEDs

⇒ page 15

-6- and -3- light up.

Note

♦

A minimum load of 0.6 A (e.g. parking light) must be switched

on, otherwise support mode is not possible.

♦

During the support mode the current draw is limited to 5 A.

– Switch on vehicle parking light.
– Exchange battery

⇒ page 31

– Switch off charging unit

⇒ page 15

– Remove charger unit terminals from battery terminals.
– Set support mode/normal mode change-over switch to

⇒ page 15

“normal mode” again.

3.1.5

Charging battery in buffer/ maintenance

mode with battery charger -VAS 5095 A-

WARNING

Danger of injury! Observe warning notices and safety regula‐

tions

⇒ page 2

In the buffer mode the battery charger -VAS 5095 A- is charged

correctly and is maintained in a fully charged condition.
– Proceed as for charging battery

⇒ page 16

Note

♦

When a battery is being charged in the buffer mode and a

consumer draws current from the battery, the battery charger

-VAS 5095 A- automatically compensates the charge.

♦

The buffer mode can be continued for an unlimited period.

♦

The battery is always ready for use.

♦

Observe battery manufacture's maintenance instructions!

Jetta 2005 ➤ , Bora 2006 ➤

Battery charger -VAS 5900-

WARNING

Danger of injury! Observe warning notices and safety regula‐

tions

⇒ page 2

This chapter describes the basic functions of the battery charger

-VAS 5900- . For additional information refer to ⇒ Operating in‐

structions for battery charger -VAS 5900- .

Note

♦

Observe ⇒ Operating instructions for battery charger -VAS

5900- .

♦

Observe battery manufacture's handling instructions!

3.2.1

Description of battery charger -VAS

5900-

Battery charger -VAS 5900- is suitable for charging
♦ Wet batteries (genuine VW batteries from 2004 with transpar‐

ent battery housing and black cover).

♦ Absorbent glass mat batteries (genuine VW batteries from

2004 with black housing).

Battery charger -VAS 5900-
1 - Display
2 - Adjustment button “Up”

↑

3 - Adjustment button “Down”

↓

4 -

START / STOP

5 -

INFO

3.2.2

Charging battery with battery charger -

VAS 5900-

WARNING

Danger of injury! Observe warning notices and safety regula‐

tions

⇒ page 2

Special tools and workshop equipment required

Jetta 2005 ➤ , Bora 2006 ➤

3. Charging battery

Note

♦

The battery must have a temperature of at least 10 °C.

♦

If the battery has cell sealing plugs, do not open them while

the battery is being charged.

– Switch off the ignition and all electrical consumers.
– Connect charger unit plug to power supply. The last selected

operating mode will appear on display

⇒ page 19

– Set battery to respective operating mode with

INFO

In the display the symbol -1- for “standard charge for wet batter‐

ies” or the symbol -2- for “standard charge for gel/absorbent glass

mat batteries” will appear.
– Set battery capacity (Ah) of battery for charging using respec‐

tive button “Up”

↑

or “Down”

↓

– Connect red terminal clamp “+” to positive terminal on battery.
– Connect black terminal clamp “-” to negative terminal on bat‐

tery.

The charger unit recognises the voltage required for the connec‐

ted battery (6 V, 12 V or 24 V) and initiates the charging sequence.

At a charge condition of approx. 80 - 85 % the charger unit

switches to the “final charge” mode. The fourth bar appears in

display -1-. The battery is ready for use.

Jetta 2005 ➤ , Bora 2006 ➤

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