Fairbanks H90-3052-D Fairbanks Scales - Manual (Page 11)

50144 Rev. 4
4.3. States of Operation,
Continued
STATE 4: TRICKLE CHARGE
 GREEN LED will be on steadily, battery
pack is considered fully charged.
 Indicates the battery has reached 7V,
and is now between 6.6V and 7.2V.
– Hysteresis is built in to allow
battery’s chemicals to settle.
 Charger will stay in this state indefinitely
as long as battery voltage remains
between 6.6V and 7.2V.
– If voltage drops below 6.6V, the
charger returns to
STATE 3:
CHARGING.
– If voltage rises above 7.2V, the
charger switches to
STATE 5:
OVER VOLTAGE.
 Trickle charge is produced at about
35% duty cycle or about 60mA*.
STATE 5: OVER VOLTAGE
 GREEN LED will be on steady with the RED LED
flashing.
 This indicates the battery has been over charged
above 7.2V.
– Current from the charger is stopped and
charger waits for voltage level to drop back
below 7.2V.
 No current is generated
* Current levels will vary between batteries, and is
only given as a reference.
4.4. Led State Reference Chart
LED STATE DESCRIPTION(S) SOLUTION
Red LED = ON  No battery connected.
 Battery voltage extremely low.  Connect the battery.
 Replace the battery
Red LED = Flashing Battery voltage ranges from 0.1 to 3.6
VDC. Allow sixteen (16) hours to charge the
battery.
Yellow LED = ON with
Red LED = Flashing
 Battery cannot charge correctly.
 Charger not charging.  Battery failed to charge.
 Replace the battery.
Yellow LED = ON  Battery charging.
 Battery voltage ranges from 3.6 to
7.2VDC.
Allow up to sixteen (16) hours to
charge the battery.
Green LED = ON with
Red LED = Flashing
 Battery has over‐charged.
 Battery voltage is greater than 7.2
VDC.
Remove battery from the charger.
Green LED = ON Battery is fully charged between 6.6
to 7.2 VDC.  Battery is ready for use.
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