User's Manual Part 1

48
2.3 ALARMS AND AUTOMATION
In case of alarm the red LED lights up and the icon of a bell appears in the upper bar of the display. If the alarm
disappears, the red LED is turned off and the bell starts blinking, in order to show that an anomaly occurred.
To know the details of the anomaly and when it occurred, the history menu can be used. Once this menu is
accessed, the blinking bell icon disappears.
In case of alarms of a board on the bus, such as the audio or the video modulator, the green status led on the
board, will start blinking. When the board is working correctly the led is lit continuously.
In case of alarm of a board on the Bus, a bell icon appears under the board image in the front or rear view
menu. Inside the board menu the alarm value will blink.
TRICK: in case of red alarm LED lit, to quickly find the alarm move between the front and rear view and
look for the bell symbol under a board. If present go inside the board menu looking for the blinking value.
While an alarm is present the exciter switch off the output power. When the alarm disappear, the power is
switched on again. After 5 times the exciter switch off the output power, the exciter goes in LockOut state: the
power remains off till the user reset the LockOut. If the fails are far more that 1 hour than the LockOut counter
is automatically cleaned.
Please find below the list of the automatic interventions of the exciter in case of anomalies, and the relevant
record in the history.
l Amplifier Voltage
No intervention. The history records and intervention if the value is too high or too low by the 10% of its
nominal value (factory setting).
l Amplifier Current
No intervention. The history records an event if the value is too high by the 20% of its nominal value (factory
setting), only when the amplifier is on.
l Amplifier Temperature
The temperature is connected to the work of the fan, if it is set to automatic mode, in this way: there are 3
thresholds, TH1 < TH2 < TH3, all with histeresys.
Under the lowest threshold (TH1) the fan is off
Between TH1 and TH2 the fan is on and rotates slowly
Between TH2 and TH3 the fan is on and rotates fast
Beyond the higher threshold (TH3) the amplifier is switched off and an event is recorded in the history.