GE Industrial Solutions CPS6000 - Manual (Page 136)

CPS6000 –48V Indoor/Outdoor Power Shelf
Issue 21 January 2008
136
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 DC OK ALARM 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
* Flashing
Current Limit Operation
x x Flashing
Communication Loss
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,