Volkswagen Golf Service & Repair Manual: Charging battery in service mode with battery charger -VAS 5900-
WARNING
Danger of injury! Observe warning notices and safety
regulations
→ Chapter! |
|
Caution
The operating mode “service charge” is not permitted
on VW vehicles as the voltage peaks will damage the
onboard electronics. |
If there is a requirement to use “service charge”
the battery must be disconnected from the onboard
supply. |
|
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
When charging always set the battery charger to the
correct type of battery
→ operating instructions for battery chargerVAS 5900! |
The “service mode” is suitable for: |
Wet batteries where the magic eye allows charging
(magic eye black or green) |
|
The operating mode “service charge (SERV)” is only used on
sulphated batteries. The battery is charged at a voltage of
> 14.4 V. This can result in a partial reduction of the
sulphated layer. After charging, always check the colour of the
magic eye before using the battery
→ Chapter. |
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 selected
operating mode will appear on display
→ Chapter. |
|
|
|
– |
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. |
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% of the battery
voltage, the battery charger switches to the “final charge”
mode. The fourth bar appears in display
-1-. The battery is ready for use. |
Note
The success of the “service charge” depends on the severity
of the sulphation of the battery |
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. |
3 - |
Battery charger does not detect a battery, when battery
voltage is less than 2 V: |
Display remains unchanged. |
The operating mode and ampere hours (Ah) as set are
displayed. |
Ending battery charging sequence: |
– |
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. |
|
|
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WARNING
Danger of injury! Observe warning notices and safety
regulations
→ Chapter!
...
WARNING
Danger of injury! Observe warning notices and safety
regulations
→ Chapter!
...
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