Fli Audio FU10A - Manual (Page 9)

9
Troubleshooting
Before removing the amplifi er, refer to the list below and follow the suggested
procedure. Always test the speakers and confi rm that they are wired correctly fi rst. If
in any doubt get help from a qualifi ed auto electrician.
AMPLIFIER WILL NOT POWER UP
• Check for good ground connections. Ensure that the ground cable is connected directly to
bare metal and not a painted surface.
• Using a multimeter check the that remote terminal has at least 7V DC.
• Using a multimeter check that there is battery voltage on the positive terminal.
• Check all fuses.
• Check that the protection light is not illuminated. If it is lit, shut off the amplifi er for thirty seconds
and then turn it back on.
PROTECTION LED ILLUMINATES WHEN AMPLIFIER IS POWERED UP
• The amplifi er is designed to shut down automatically when the units temperature goes above 80
degrees. If the amplifi er feels very hot then this may be the reason for the amplifi er not starting.
• Check that there is good airfl ow around the amplifi er. In some applications an external fan may be
required.
BLOWN FUSE(S)
• Check both positive supply and ground for shorts.
• Check that the positive wire is connected to the positive terminal on the amplifi er.
• Check that the negative wire is connected to the ground terminal on the amplifi er.
• Ensure that the correct rated fuse is fi tted:
FLI UNDERGROUND FU10A, FU12A (20 amp)
FLI UNDERGROUND FU12TA (25 amp)
DISTORTED SOUND
• Check the gain control is not set at too high a level. If the sound is distorted turn the down the gain until the
sound is clear.
• Check that all crossover frequencies are correct. See Setup section for more details.
• Check that the ground cable is making good contact with the vehicle chassis.
• Check the the RCA cables are making good connection with the source and amplifi er.