Operation Manual

OM-E 2072-09287-00
A-2
To control battery charging, the FRN8570B charger unit automatically tests the battery pack as it is
connected to the charger, and continues monitoring the battery state during the charging process, to
detect the exact moment when the battery becomes fully charged. This prevents overcharging of
batteries. The operator is informed of the progress of charging by a status indicator.
The charging process is as follows:
• When powered up, the charger unit checks the current and voltage supplied to the battery
connector, to detect the connection of a battery pack of the proper type, and identify defective
battery packs. This enables the detection of failed batteries, for example, batteries with
short-circuited cells, so that such batteries can be taken out of service.
• When the connection of a battery pack of the proper type is detected, charging proceeds until
the pack is fully charged. While charging proceeds, the charger unit LED flashes green, and
changes to steady lighting in green when charging is complete.
• If a fully charged battery remains connected after its charging is completed, as long as the
FRN8570B is powered the charger remains in standby (the LED lights steadily in green, with
short blinks every 30 seconds).
A-4. FRN8570B OPERATING INSTRUCTIONS
A-4.1 Familiarization with Charger Unit
Figure A-1 shows a typical charger unit. The unit includes the following items:
• DC input connector: round 2.5 mm connector for the 24 VDC charger supply voltage.
• DC output cable, terminated in a plug matching the FRN8577 charging connector.
• Status indicator. Table A-1 explains the indications provided by this indicator.
Status Indicator
Charger
Output Cable
DC Input
Connector
Figure A-1. Charger Unit, General View
Table A-1. Status Indications
Indicator State Meaning
Off Charger not powered
Green flashing Charging in process
Green steady on
(short blinks every
30 seconds)
Charge process complete, battery is fully charged
Charger in standby (no battery connected)
Red steady on Error condition, for example, short-circuit across charger terminals, or
connection to incorrect type of battery (for example, NiCd or NiMH battery)