Garmin Fusion Apollo MS-API2000, Installation Instructions Manual

Potential Cause Potential Resolution

Power issue

Check the power cables to make sure they are the appropriate gauge, are fused, and are 
connected properly (

Connecting to Power, page 9

).

LED is Green the Sound is not Optimal

Issue

Potential Resolution

There is a hum or other 
unexpected noise from a 
speaker

Install ground-loop isolators inline with the RCA cables from the stereo.
NOTE: You should install ground-loop isolators on the RCA cables where they 
connect to the stereo, not where they connect to the amplifier.

The sound is distorted or 
clipping

Check the DSP settings in the Fusion-Link app and make sure the correct 
speakers, stereo, and amplifier are selected.
NOTE: You must select the option in the app to send the DSP settings to the 
devices after you configure the settings.

LED is Orange

Potential Cause

Potential Resolution

Power supply under- or 
over-voltage issue

Check the input power to make sure it is within the 10.8 to 15 Vdc operational range 
for the amplifier.

Power wire gauge issue

Check the wire gauge used to connect the amplifier to power, and make sure it is 
appropriate for the length of the wire run.

Over-temperature issue

Check the temperature of the amplifier and make sure it is under 50°C (122°F). If the 
amplifier is hotter than the operational temperature rating, add ventilation to the 
installation location or mount the amplifier in a different location.

NOTE: The amplifier will automatically attempt to recover from a recoverable fault (orange LED). If multiple 
attempts of recovery are not successful, then the amplifier will transition to a critical fault status (red LED). You 
can power cycle the amplifier or toggle the REM signal to reset the critical fault.

LED is Red

Potential Cause

Potential Resolution

Power supply 
under- or over-
voltage issue

Check the input power to make sure it is within the specified voltage operating range for 
the amplifier.
If the amplifier experiences a number of under-voltage faults (orange LED) in a short 
period of time, it will consider the issue a critical fault and change the LED color to red. 
Therefore, a series of orange indicators followed by a red indicator may be due to an 
under-voltage issue.

Prolonged over-
temperature issue

Check the temperature of the amplifier and make sure it is under 50°C (122°F). If the 
amplifier is hotter than the operational temperature rating, add ventilation to the installa­
tion location or mount the amplifier in a different location.

DSP setting or 
volume issue

Check the DSP settings in the Fusion-Link app and make sure the correct amplifier, 
speakers, and/or subwoofer(s) are selected.
NOTE: You must select the option in the app to send the DSP settings to the stereo after 
you configure the settings.

High-volume issue

Reduce the volume.

Speaker fault

Check all connected speaker wires.

Fusion Apollo Series Installation Instructions

19