L. Cable Size Selection
Wire Size (AWG) Area (mm
2
) Maximum one-way distance
(feet) for 2% Voltage loss
(15A)
Maximum one-way distance
(feet) for 2% Voltage loss
(20A)
Maximum one-way distance
(feet) for 2% Voltage loss
(30A)
10
5.26
15.3
11.5
6.7
8
8.37
24
18
10.3
6
13.3
38
29
15
4
21.2
60
45
28
2
33.6
96
72
45
1/0
53.5
154
116
73
2/0
67.4
192
144
90
4/0
107
282
212
142
Table: Selection of cable size and length versus current
M. Fault Indications
PROTECTIONS & FAULT INDICATIONS WITH CAUSES
PROTECTION / FAULT
FAULT
LED
OTP LED CHARGER OUTPU: OFF= No Output REMOTE CONTROL UNIT &
LCD Fault Display
REMARKS
Output power decreases due to
high operating ambient
temperature
OFF
Flashing
ON
At reduced power in 25% step leading
to output off high temperature protection
see next row
no specific indication for high
temperature decreased output
Auto return to full set
power gradually as
unit temp cools down
charger over heat, OTP
protection on
Solid
ON
Solid
ON
OFF
Manual power on off reset after fault
cleared
Alarm flash & Buzzer on
“
Charger
High Temp”
Charger preset to reduced output
power
OFF
OFF
ON At reduced output power as selected
Indicates
“
xx% Power Set”
This is not a fault!!
So no specific
indication
Battery over heat detected by
remote temp sensor at (60
°
C)
Flashing
Solid
ON
OFF
Manual power on off reset after fault
cleared
Alarm flash & Buzzer on
“
Bat Over
Temp
”
Fan not working or stuck
Flashing
Flashing
OFF
Manual power on off reset after fault
cleared
Alarm flash & Buzzer on
“
Fan Fault
”
Output Over Voltage Protection
when output voltage is 4%
higher than it should be for the
battery type and charge stage
Solid
ON
OFF
OFF
Manual power on off reset after fault
cleared
Alarm flash & Buzzer on
“
Output V
High
”
To protect battery and
load connected.
Overload/ Over Current
Protection when output current
is 10% higher than the rated
maximum level
Solid
ON
OFF
OFF
Manual power on off reset after fault
cleared
Alarm flash & Buzzer on
“
Overload”
To protect charger
Short Circuit for > 20 sec
Solid
ON
OFF
OFF
Manual power on off reset after fault
cleared
Alarm flash & Buzzer on
“
Output
Shorted
”
Short Circuit for < 20 sec
OFF
OFF
ON
Charger returns to normal after fault
cleared
Reverse Polarity Protection
(Thermal Fuse)
Solid
ON
OFF
OFF
Manual Power on off reset after
correct fuse replaced
Alarm flash & Buzzer on
“
WRONG POLARITY”
Bulk 4 hour soft start timer
charging reaches 4 hours
because battery voltage is
less than 24V for 4 hours
.
Solid ON OFF
OFF
Manual Power on off reset.
Disconnect or switch off active load,
Check & set output to maximum
Alarm flashes & Buzzer on Fault
mode shows
“DC Voltage Low”
EARLY WARNING
for Battery Capacity,
load and charger not
balanced.