Owner's Manual

AtlasSound.com – 14 –
Owner’s Manual
AA400PHD
400W Mixer Amplifier
1601 Jack McKay Blvd. • Ennis, Texas 75119 U.S.A.
Telephone: [phone] • Fax: [phone]
How To Trouble Shoot Your Speaker System If The Limit LED Is Illuminating
C. If the first two check points are OK, there is probably a short in the wiring of the speaker system. Common causes include
staples through the wire and the wire cut by metal conduit causing a short to ground.
D. Excessive Current Draw - The Limit LED will illuminate Yellow when the amplifier is consuming excessive current. The most
likely cause for the fault is an incorrect load impedance connected to the amplifier. The LED should not steadily illuminate if a
proper load is applied. Note: An occasional LED flash is okay during standard operation. When LED is ON audible distortion
may be heard at the speakers.
E. After finding and correcting the issue, perform the PHD test until the Limit indicator is no longer illuminating.
Note: During the initial start of the diagnostic test, the Limit indicator may flash Yellow for a few seconds until an accurate
diagnostic reading has been completed, continue to hold the PHD switch in for 5 seconds to assure the test is complete.
After 5 seconds and the Limit indicator is illuminating Yellow steadily, stop and read the section “How to Trouble Shoot Your
Speaker System If the Limit LED is Illuminating.