PROEL AE300, Operating And Installation Manual, Page: 20 / 50

20
UNDERLOAD  Loss of line load
OVERLOAD  Increase of line load
BAD LOAD  Line impedance not manageable
LOAD SHORT  Line in short-circuit
The speaker line can be connected or disconnected:
Func: Connected  Speaker line connected
Disconnected  Speaker line disconnected
To access the POP-UP where to insert or remove the “disablement” condition, you
must have access level 2, otherwise a screen is displayed where you are required to
login to carry out this operation.
From the POP-UP, with the section in “disablement” you can calibrate the line
impedance by selecting the “Calibrate line” command; execution is immediate and the
outcome is shown on the status detail screens of the line of speakers. This operation
measures the line impedance at 20KHz to continuously evaluate any changes denoting
a change in load.
NOTE : When the “Line & Amp” section is in “disablement,” all safety functions related
to the amplifiers and speaker lines are deactivated. Any “FAULTS” are also removed.
The “disablement” function allows working on the speaker lines without interrupting
the system operation and without generating “FAULTS.”
When the line calibration command is selected, the screen changes and a counter
appears indicating the time to wait for the procedure to be performed, at the end of
which a screen summarising the outcome appears.
Listed below is the status of the two amplifiers and of the two lines managed by the
system
•
Main Amp:  Primary amplifier
•
Backup Amp:  Backup amplifier
Status of the amplifiers:
ABSENT
 Not installed
FAULT 
Faulty
OVERTEMP
 Condition of overheating
OK  Running
•
Line A:  Speaker line A
•
Line B:  Speaker line B
Speaker line status:
DISABLED
 Not in use
GND SHORT  Earthed speaker line
NO LOAD DETECTED
 Speaker line interrupted
UNDERLOAD  Loss of line load
OVERLOAD 
Increase of line load
BAD LOAD  Line impedance not manageable
LOAD SHORT  Line in short-circuit