ADT-CHG-120 Instruction 05/01/98 PN 50938:A
17
Table 7 shows the conditions that cause the charger LEDs to come on:
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The ADT-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
No
rm
al
Ope
rat
io
n
AC
T
ro
u
b
le
Disc
on
n
e
cted
Ba
ttery
Gr
o
u
n
d
F
a
ul
t
Sho
rt
C
ir
cuit
F
a
u
lty
Ba
ttery
(o
r less th
e
2
1
V)
Tr
o
u
b
le
(
w
it
h
A
C
Tr
o
u
b
le
De
lay u
sed
)
T
rou
bl
e
(
M
ast
e
r T
rou
b
le In
J
P
6 con
n
ected
)
AC On
+
+
+
+
+
+
Trouble
+
+
+
+
+
+
+
Ground Fault
+
HI Charge
,
,
,
,
,
LO Charge
(Loss of AC)
,
+
+
,
,
+
,
27 V
,
,
+
,
,
,
25 V
,
,
,
,
,
23 V
,
,
,
,
,
Low Battery
,
,
,
+
+
,
,
/HJHQG
+
LED on.
,
LED on or off, depending on battery voltage. Refer to “Normal Operation.”
Table 7 LED Status Indicators
