11
9400000-J0 Rev C
3.1.1 Rectifier 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 communi-
cation 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 because of
the following conditions:
Output fuse blown
AC mains input fail
Module fail (ramp test fail)
Local shutdown
High voltage (Over voltage
protection (OVP)) shutdown
Thermal shutdown
UPF fail
No output power
Fan (1 and 2) fail
The LED flashes (~2Hz) when a minor alarm is detected if the modules output capability has been reduced or a
minor component failure is detected during the following conditions:
VAC meter fail
AC foldback
Remote equalize
Fan fail
Low output voltage
High output voltage
Current limit (programmable option)
Power limit (programmable option)
High temperature foldback
Temperature sense fail
Soft start operation
Communications lost
The LED remains extinguished in the absence of an alarm.
LED Activity During Software Upload
When a rectifier software upload is in progress, the LEDs flash in a distinct pattern to indicate new rectifier soft-
ware is being transferred from the CXC. 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 CXC
The ‘Locate Module’ command from the CXC, causes the target rectifier LEDs to flash in a ping-pong pattern that
repeats every 2 seconds. Each LED illuminates sequentially and after the last LED illuminates, the sequence is
reversed. When the first LED is illuminated, the pattern repeats. This effect makes it appear that the light bounces
between the first and last LED.
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.
