Page 3 of 12 DocNo.DCP0001326 DSM 06/01/05 rev7
Each amplifier’s current status is displayed on the front panel, along with output bar graphs for each channel,
and the access status. All indicators are in accordance with BS 5839: Part 4: 1988.
Each amplifier module has a separate indication on the front panel for the following states:
Name
Function / Description
1
Output level
A four-element moving dot display shows the current amplifier output
level in logarithmic steps with 0dB being full power.
2
Priority
The control contact on the main input is closed.
3
Protect
The onboard protection systems have been activated and the load is
now isolated.
4
Sleep
This facility is not used as it does not comply with BS5839-8
5
Load Hi
The load monitoring system has detected an open circuit or higher
impedance than was set at commissioning.
6
Load Low
The load monitoring system has detected a closed circuit or lower
impedance than was set at commissioning.
7
Contact Fault
The main input control contact or wiring is either open circuit or short
circuit.
8
Tone fail
(Load Hi and Load Low lit)
The amplifier cannot detect the 22 kHz monitoring tone.
The power supply unit also has front panel status indication for the following states:
Name
Function / Description
1
AC in
The AC mains supply is healthy.
2
DC in
The reserve battery supply is in use.
3
PSU Fault
The battery charger has detected either a short circuit or high
impedance battery.
4
Aux. on
The auxiliary power supply for external equipment is available.
5
OK
All the functions of the amplifier are normal.
