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Alarms and Displays
Status LEDs
Three LEDs are provided, two green LEDs named AC OK and DC OK, and a red LED named Alarm. Their
indications are listed below, followed by complete status descriptions.
LEDs: *= On, x=either state
AC OK
*
*
*
*
x
Status Descriptions
Normal Operation: Rectifier is operating within specified parameters.
Start Up: Rectifier is inserted into the shelf, powered up and initializing. Output power is not yet
available.
High Voltage Shutdown: The CPS6000 rectifiers will shut down if either of these conditions are true:
•
If an individual rectifier's output voltage is above 58V.
•
If an individual rectifier's output voltage is greater than 59.9V for 1ms.
In both cases, the rectifier will attempt to restart up to three times. If after the third attempt the fault
conditions prevail, the unit will be latched off and will require user intervention.
If the rectifier does latch off, the power supply must be power cycled. This may be accomplished by
disengaging the power supply from its mating connector on the shelf, waiting until the front panel
LEDs have stopped illuminating and then reinserting it back in the shelf.
Thermal Alarm (Power Limiting): The rectifier power limits itself to protect itself from thermal
damage, yet at the same time, trying to support the load. An internal critical temperature is monitored.
If the temperature exceeds 75°C, the QS862A rectifier begins to limit the output current. If the
temperature exceeds the internal thermal safety temperature,
the rectifier will shut down. It will restart when the temperature drops below 10°C below the threshold.
Prior to shutdown, the rectifier transmits a rectifier fail alarm to the system controller. While in the
thermal shutdown mode, the rectifier front panel LEDs will light as indicated in the Status LED table.
Hiccup: If the rectifier output is short-circuited or if its output voltage drops below 36V, the rectifier
will go into a hiccup mode. In this mode, the rectifier will shutdown for 10s and attempt to restart. If
the short circuit conditions exist, the rectifier will shutdown and perform another restart in 10 seconds.
If the short / overload persists, the rectifier will shut down and attempt to restart a maximum of 3
times. After 3 restart attempts, the rectifier will shut down and lock out.
AC Fail: If the ac input voltage goes out of the operating range, the rectifier will issue an AC Fail alarm.
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DC OK
ALARM
*
*
Flashing
x
Flashing
Condition
Normal Operation
Start Up, Hiccup, Remote Standby
High Voltage Shutdown, Thermal Alarm, Internal Failure
AC Fail, PFC Fail, Input Fuse, Missing AC, Low Input AC > 15 ms
Current Limit Operation
Communication Loss
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