Alpha Technologies CXPS-HD 48-1.2-225 - Manual (Page 32)

0530082-J0 Rev B Page 24 of 31
1. Attempt to synchronize with the NTP server (www.NTP.org).
2. Retrieve the last time stamp from the Event Log.
3. Retrieve the last time stamp from the Statistics Log.
4. Set the time to 2005-01-01 midnight.
6.5 LVD control
CAUTION: Before removing a controller from a live system or performing controller maintenance,
an external LVD inhibit or override is required to avoid a disruption of service.
The LVD Control functions are hardwired directly from the assigned relay output to an optional front panel LVD
override control. Place the LVD auto/bypass switch to the BYPASS position to keep the LVD contactor engaged.
CAUTION: Do not leave the switch in the BYPASS position. Doing so may result in a complete
discharge of the batteries during a power failure situation.
To allow the controller to resume automatic control of the LVD contactor, check that the LVD status LED is
illuminated in green.
6.5.1 Operation of the LVD auto/bypass switch and status LED
The LVD auto/bypass switch is used to control the operation mode of the LVD contactor. The Bypass mode
should only be used by qualified personnel and only as a temporary measure.
During normal operation the switch is in the AUTO position, which is with the toggle of the switch to the left. In this
mode of operation, the LVD contactor is supplied by the Cordex controller and the LVD status LED is illuminated
in green.
In the event of input power loss due to a rectifier failure or loss of AC power, the Cordex controller will disconnect
the battery supply if the voltage falls to a preset voltage. The green LVD status LED extinguishes.
To manually bypass the Cordex controller and force the LVD to stay on regardless of the input from the Cordex or
the battery voltage, move the LVD auto/bypass switch toggle to the right position. The Bypass mode is indicated
by the LVD status LED on the distribution panel, which changes from green to yellow. In addition, the alarm LED
on the CXCM1 controller also illuminates and the alarm is logged in the event log.
NOTE: For distribution panels without a LVD, the LVD bypass circuit is active although there is no contactor to
control. Placing the switch in the bypass position (right position) will generate the same alarms described
above.