Operating the Charger
Normal Operation
16
CHG-120 Instruction 11/22/04 PN: 52459:A FCI P/N:9000-0572
Table 7 shows the conditions that cause the charger LEDs to come on:
Normal Operation
The CHG-120 charges batteries at 4.5 A. When batteries are fully charged, the charger
maintains a float charge of 27.6 VDC at a trickle charge rate of less than 400 mA. While
charging the batteries, the HI and LO Charge LEDs switch on and off approximately every
20 seconds. Also, one of the 23 V, 25 V, 27 V, or Low Battery LEDs also comes on,
depending on the battery voltage.
LED
Normal Operation
AC T
roub
le
Disconnected
Bat
tery
Gr
ound Fault
Shor
t Cir
cu
it
Faulty Battery
(or less the 21
V)
T
rouble (
w
ith AC T
rouble
Delay used)
T
rouble
(M
aster T
rouble In
JP6 connect
ed)
AC On
H
H
H
H
H
H
Trouble
H
H
H
H
H
H
H
Ground Fault
H
HI Charge
I
I
I
I
I
LO Charge
(Loss of AC)
I
H
H
I
I
H
I
27 V
I
I
H
I
I
I
25 V
I
I
I
I
I
23 V
I
I
I
I
I
Low Battery
I
I
I
H
H
I
I
Legend:
H
LED on.
I
LED on or off, depending on battery voltage. Refer to “Normal Operation.”
Table 7 LED Status Indicators
