FAG Detector III User Manual page 301

After charging automatic switching over to trickle charge, thus overloading is not
possible.
Operation
1. Select the appropriate primary plug and connect it to the charger until it clicks
into place and is locked (see section Set primary plug).
2. Connect the charger to an convenient mains socket.
3. Connect the battery pack to the FAG Detector: Usually the battery pack is
brought into contact by pushing the battery pack onto the bottom of the FAG
Detector until it clicks in place.
4. Connect the charger with the FAG Detector: Connect the plug of the charger
cable into the socket of the FAG Detector (next to the serial socket) and lock it.
The battery pack will be charged after the battery test phase has finished (LED
lights green).
If the LED still keeps flashing red after the test phase, the b attery
pack is faulty and you have to throw it away in a special container
for small chemical waste.
After the charging procedure the charger switches automatically over to trickle
charge (LED lights green). Overloading is not possible.
Stop charging by disconnecting the the plug of the charger cable from the socket
of the FAG Detector.
Indicators
LED is off: The battery pack is not connected or the charger is not supported
with current.
LED flashes red: An error occurred or the battery pack is faulty.
LED flashes green: The battery pack will be charged.
LED lights green: The battery pack is fully charged and the trickle charge is
active.
Safety
Only charge b attery packs of the FAG Detector.
Do not open the charger.
Repairs may only b e done b y the manufacturer.