1, the current between a phase jack alarm light, and alarm sound: this phase current open circuit or load exceeds the actual output range, check the wiring and load and try again.
2, power amplifier power supply or output voltage immediately jump power amplifier, power indicator flashing red light and alarm sound: turn on the power amplifier button, check whether the voltage circuit is short circuit or serious overload.
3. During the test, switch on the power amplifier power supply: first, the software stops the operation output, and then the power amplifier button is lifted. The self-protection signal should return, and the power indicator light will emit green light and stop the alarm sound. Press the power amplifier button again and continue the test. If the self-protection signal cannot be restored after pressing the power amplifier button on the panel, or the self-protection acts again after pressing the button, it should be considered whether the output of large current for a long time.

GE D20 EME 10BASE-T Substation controller