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User’s manual
18.23
EXPERT 1K-FA
Diagnostics.
During normal working, the system performs a continuous monitoring of some
measurements directly acquired from certain internal test-points; among the most
important are the ones related to the power-supply unit behaviour.
When a dangerous situation is going to happen, a “serious” alarm message is raised
and the amplifier is switched from OPERATE to STANDBY.
The user can either immediately restore the Main Display Page by pressing the
[DISPLAY] key or wait for the visual alarm time-out expiration (about 10 seconds).
In the following picture is shown, as an example, the case of a power-supply unit trouble
(the power-supply voltage level is fallen below the programmed threshold) while in
OPERATE mode:
After having restored from an alarm message, the Alarm History report can be viewed
and browsed as described in the relative section.
The following table shows all the system’s alarm messages that are recorded in the
Alarm History stack:
MESSAGE
POWER MANAGEMENT: V PA < 20 V
POWER MANAGEMENT: V PA < 26 V
POWER MANAGEMENT: V PA > 50 V
POWER MANAGEMENT: I PA > 40 A
POWER MANAGEMENT: I PA > 50 A
P.A. MANAGEMENT: OVER DRIVING
P.A. MANAGEMENT: PA PROTECTION
P.A. MANAGEMENT: PW REV > 300 W
OVER TEMPERATURE: TEMP > 90 °C
MEANING
HALF mode: supply voltage level < 20 V
FULL mode: supply voltage level < 26 V
HALF/FULL mode: supply voltage level > 50 V
HALF mode: supply sourced current > 40 A
FULL mode: supply sourced current > 50 A
Amplifier over driving
Internal hardware protections intervention
Reflected power > 300 W
Heatsink temperature > 90 °C (194 °F)
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