FLI LOADED 450s - Troubleshooting Guide; Amplifier Power Issues; Protection LED and Overheating; Fuse and Sound Issues

T
roubleshootin
g
Be
f
ore removin
g
the ampli
f
ier, re
f
er to the list below and
f
ollow the su
gg
ested procedure.
O
Alwa
y
s test the speakers and con
f
irm that the
y
are wired correctl
y
f
irst.
O
I
f
in an
y
doubt
g
et help
f
rom a quali
f
ied auto electrician.
A
m
p
li
f
ier Will Not Power U
p

C
heck
f
or
g
ood
g
round connections. Ensure
G
round cable is connected directl
y
to bare metal and not a painted sur
f
ace.

U
sin
g
a multimeter check the that remote terminal has at least 7V DC.

U
sin
g
a multimeter check that there is batter
y
volta
g
e on the positive terminal.

C
heck all
f
uses.

C
heck that the protection li
g
ht is not illuminated. I
f
it is lit, shut o
ff
the ampli
f
ier
f
or thirt
y
seconds and then turn it ba
c
k
o
n.
Protection LED Illuminates When Am
p
li
f
ier Is Powered U
p

C
heck
f
or shorts on all speakers wires.
(
i.e no speaker wires should be
j
oined to
g
ether and no speaker wires should be
touchin
g
the car’s chassis
)
O
The ampli
f
ier is desi
g
ned to shut down automaticall
y
when the units temperature
g
oes above 80 de
g
rees. I
f
the ampli
f
ier
f
eels ver
y
hot then this ma
y
be the reason
f
or the ampli
f
ier not startin
g
.
O
R
emove the speaker wires and reset the ampli
f
ier. I
f
the Protection LED still comes on then the ampli
f
ier is
f
ault
y
. This
dama
g
e ma
y
have been caused b
y
either
f
ailure to
f
ollow these setup
g
uidelines or abuse.
A
mpli
f
ier
G
ets Ver
y
Hot

C
heck the minimum speaker impedance
f
or the ampli
f
ier is correct. This ampli
f
ier is not recommended
f
or impedance
l
oads below 2
O
hm stereo and
/
or 4
O
hm brid
g
ed mono.

C
heck
f
or shorts on all speakers wires.
(
i.e no speaker wires should be
j
oined to
g
ether and no speaker wires should be
touchin
g
the car’s chassis
)

C
heck that there is
g
ood air
f
low around the ampli
f
ier. In some applications an external
f
an ma
y
be required.
B
lown Fuse
(
s
)

C
heck both positive suppl
y
and
g
round
f
or shorts.

C
heck that the positive wire is connected to the positive terminal on the ampli
f
ier.

C
heck that the ne
g
ative wire is connected to the
g
round terminal on the ampli
f
ier.

En
su
r
e
th
a
t th
e
co
rr
ec
t r
a
t
ed
f
use
i
s
fitt
ed:
FLI Loaded 450s – 20 amp
Di
s
torted
S
ound

C
heck the
g
ain control is not set at too hi
g
h a level. I
f
the speakers sound distorted turn the down the
g
ain until the
sou
n
d
i
s
c
l
ea
r.

C
heck that all crossover
f
requencies are correct.
S
ee
S
etup section
f
or more details.

C
heck for shorts on all speaker wires.

C
heck all speakers are wired correctl
y
. With the correct polarit
y
bein
g
observed on each connection.
8