9400000-J0 Rev E
12
4.1.1 LEDs
The front panel LEDs indicate:
• Rectifier status summary
• Rectifier software upgrade in progress
• Patterned response to Locate Module command
The rectifier status summary shows the rectifier alarm status, communication fail status, and rectifier on/off status.
AC ON (1)
The green LED is illuminated when the AC input voltage is within its allowable range. The LED flashes (~2Hz) when
input voltage is outside the allowable range. The AC input voltage is invalid if the AC Mains Low or AC Mains High
alarm is active. This LED extinguishes if the AC input fails.
DC ON (2)
The green LED is illuminated when the rectifier is delivering power to the load. The LED flashes when communication
is lost. The LED extinguishes when the rectifier is off, e.g., when commanded via the CXC.
ALARM (3)
The red LED is illuminated during an active Module Fail alarm if the module is unable to source power.
The LED flashes (~2Hz) when a minor alarm is detected if the modules output capability has been reduced or a mi-
nor component failure is detected.
The LED remains extinguished in the absence of an alarm.
LED Activity During Firmware Upload
When a rectifier firmware upload is in progress, the LEDs flash in a distinct pattern to indicate new rectifier firmware
is being transferred from the controller. All three LEDs flash in a sequence lasting 1.5 seconds. When the last LED is
lit, the sequence is repeated beginning at the first LED.
LED Activity During the ‘Locate Module’ Command from the Controller
When the “locate module” command has been received from the controller, the LEDs behave in a distinctly different
way so that the rectifier is easier to visually identify among adjacent rectifiers.
This state is entered when commanded via the controller. The LEDs flash in a distinct pattern repeating every two
seconds.
Mechanical
A thumbscrew is provided to secure the rectifier into the shelf. During normal operation the rectifier must be locked
into position. A handle or grip on the front panel helps to remove the rectifier from the shelf. No special tools are
required.
