Troubleshooting - Rockford Fosgate Power T15kW Installation & Operation Manual

T
ROUBLESHOOTING
When troubleshooting, sometimes it's the simplest things we overlook. Like loose connections, blown fuses or maybe the source unit
was switched to mute. Before getting too in depth, check the simple things first.
Amplifier does not come on.
1. Verify power connections at amplifier. Check battery connections.
2. Check in-line fuse on battery positive cable. Replace if necessary.
3. Verify that Ground connection is connected to clean metal on the vehicle's chassis. Repair/replace if necessary.
4. Verify there is 10.5 - 15.5 Volts present at the positive battery and remote turn-on cable (source unit turned on).Verify quality
connections for both cables at amplifier, source unit, and battery/fuseholder. Repair/replace if necessary.
Amplifier's LEDs blink on and off when turning unit on.
1. Check that the vehicle charging system is maintaining proper voltage to the amplifier (10.5 - 15.5 Volts).
Available Power LEDs constantly read below 70%
1. Check that the vehicle charging system is maintaining proper voltage to the amplifier (10.5 - 15.5 Volts).
2. Too low of a speaker impedance may also be the cause. Check for proper speaker impedance, rewire if needed. Minimum
impedance load is 0.5 ohm stereo and 1 ohm bridged.
Frequency and Gain LEDs for Channels 3 and 4 do not light
1. Channel Link switch is ON (pressed in).When the Channel Link Button Switch is engaged, only the Channel 1-2 controls will
function and the gain and frequency displays on the top panel status board for channels 3 and 4 will turn off.
Controls for Channels 3 and 4 do not function..
1. Channel Link switch is ON (pressed in).When the Channel Link Button Switch is engaged, only the Channel 1-2 controls will
function and the gain and frequency displays on the top panel status board for channels 3 and 4 will turn off.
All four channels have output when only using Channel 1 and 2 inputs or no output when only using Channel 3 and 4 inputs
1. Channel Link switch is ON (pressed in).This switches the inputs to a 2-channel mode, allowing connection to only the
Channel-1 and Channel-2 inputs with a full 4-channel output.
Over-Current light is on and amplifier cuts off.
1. This is a sign of a possible short in the speaker connections. Check for proper speaker connections and use an ohm meter to
check for possible shorts in the speaker wiring. Check the speakers for possible damage.
2. Too low of a speaker impedance may also be the cause. Check for proper speaker impedance, rewire if needed. Minimum
impedance load is 0.5 ohm stereo and 1 ohm bridged.
Thermal light is on and amplifier cuts off.
1. This is usually a sign of driving the amplifier at very high power levels without adequate airflow around the amplifier. Shut off the
system and allow to cool. Ensure adequate ventilation at the back, front and top of the amplifier for air flow (3" minimum).
Check that the amplifier's intake and exhaust ports are not blocked.
2. Check for proper speaker impedance, rewire if needed. Minimum impedance load is 0.5 ohm stereo and 1 ohm bridged.
3. Low battery voltage may also be the cause. Check that the vehicle charging system is maintaining proper voltage to the amplifier
(10.5 - 15.5 Volts).
If the previous items do not solve the problem, a fault may be in the amplifier, call customer service for support.
Amplifier Turn-on Pop.
1. Disconnect input signal to amplifier and turn amplifier on and off.
2. If the noise is eliminated, connect the REMOTE lead of amplifier to source unit with a delay turn-on module.
OR
1. Use a different 12 Volt source for REMOTE lead of amplifier (i.e. battery direct).
2. If the noise is eliminated, use a relay to isolate the amplifier from noisy turn-on output.
Excess Engine Noise.
1. Route all signal carrying wires (RCA, Speaker cables) away from power and ground wires.
OR
2. Bypass any and all electrical components between the source unit (radio) and the amplifier. Connect source unit directly to
input of amplifier. If noise goes away the unit being bypassed is the cause of the noise.
OR
3. Remove existing ground wires for all electrical components. Reground wires to different locations.Verify that grounding location
is clean, shiny metal free of paint, rust etc.
OR
4. Add secondary ground cable from negative battery terminal to the chassis metal or engine block of vehicle.
OR
5. Have alternator and battery load tested by your mechanic.Verify good working order of vehicle electrical system including
distributor, spark plugs, spark plug wires, voltage regulator etc.
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