AHB2
Instruction Manual Rev F
Page 19
Over-Temperature Fault
The temperature of the left and right heat sinks are constantly monitored. If either heat sink
reaches the maximum allowable temperature, both channels are muted to protect the amplifier and
speakers. All high-power subsystems are shut down to accelerate the cooling process. One or both
heat sinks will be very hot. After the unit cools, a power reset will be required.
Fault Display:
POWER
light is Flashing
Both
CLIP
lights are Off
One
TEMP
light is On
Both
MUTE
lights are On
Typical Causes:
The load impedance of the speakers may be too low
Heat sinks may be obstructed
Amplifier has been overloaded with a high-amplitude test tone
Required Actions:
Make sure the nominal
STEREO
load impedance is 3 Ohms or higher
Make sure the nominal Bridged
MONO
load impedance is 6 Ohms or higher
Maintain adequate clearance around heat sinks
Allow time for the amplifier to cool
Turn down the audio source
Restart the amplifier