AE Techron 7800 Series Operation Manual page 17

7800 SERIES OPERATION – SECTION 3
Figure 3.5 – Fault Status Indicators for Single Amplifiers (continued)
Fault Status
Main Status Reported on
Indicators LCD Display
Run
WARNING!
Ready
OVERVOLTAGE
Standby
Stop
Figure 3.6 – Fault Status Indicators for Multi-Amplifier Systems
Indicator is lit
One or More Amps in System Main Status
Fault Status
Main Status Reported on
Indicators LCD Display
WARNING!
Run
OUTPUT DE-
Ready
VICE FAULT
Standby
Stop
Run
WARNING!
Ready
OVERLOAD
Standby
Stop
Run
WARNING!
Ready
OVERTEMP
Standby
Stop
96-8007105_07-14-23
State of Operation
Overvoltage: This indicates that the AC
mains voltage is more than +10% of nominal.
The amplifier will be forced to Standby when
an Overvoltage condition occurs. When the
Overvoltage condition is cleared, the ampli-
fier will automatically return to Run mode.
Indicator is not lit
Indicators of
Other Amps
in System State of Operation
Output Device Fault status:
This indicates that an Output Fault
condition has occurred in the am-
plifier displaying the Fault status,
Run
and the system has been placed in
Ready
Standby mode. The Fault indicator
Standby
will light under two conditions: 1)
Stop High-frequency oscillation is caus-
ing high shoot-through current; or
2) An output transistor has shorted,
causing the output fault condition.
Overload status: This indicates
Run
that the output of the system could
not follow the input signal due to
Ready
voltage or current limits.
Standby
Stop
Overtemp status: Each ampli-
fier in the system monitors the
temperature inside the high-voltage
transformers, low-voltage trans-
former and in the output stage heat
sinks. The Overtemp indicator will
Run
light and the system will be placed
Ready
in Standby mode when the tem-
Standby
perature sensors detect a condition
that would damage the amplifier
Stop
system. If the Overtemp pulse is
extremely short, as in the case of
defective wiring or switches, the
Fault LED may be lit too briefly to
observe.
Information subject to change
Action Needed to Clear Fault
Condition and Return to
Run Mode
To clear an Overvoltage fault condi-
tion, the AC mains must be brought
down to the nominal value. If the
amplifier does not return to Run mode
when the Overvoltage condition has
cleared, the amplifier may require ser-
vicing. Please see the Troubleshoot-
ing section for more information.
Indicator may be lit
Action Needed to Clear
Fault Condition and Re-
turn to Run Mode
This fault condition cannot
be cleared using the front-
panel Reset button. See the
Troubleshooting section for
more information on diagnos-
ing and clearing this fault
condition.
To remedy the Overload fault,
turn down the level of the
input signal until the Overload
indicator turns off.
To reset after an Overtemp
fault has occurred, make sure
the amplifier fans in all ampli-
fiers are running, and then
remove the input signal from
the system. Allow the fans
to run for about 5 minutes
until the system automatically
returns to Run mode. Please
see the Troubleshooting
section for information on
correcting the cause of an
Overtemp fault condition.
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