Alarms

Fuel Alarm Limits

Low Fuel Alarms:

 

Percent Fill: If the amount of fuel as a percentage falls below this value, an alarm

 

condition exists (see “Fuel monitoring/runtime calculation” on page 9 for more

 

information).

 

Runtime: If the estimated runtime falls below this value, an alarm condition

 

exists (see “Fuel monitoring/runtime calculation” on page 9 for more

 

information).

Other Limits

Other Limits:

 

Frequency: If the frequency is outside this range, an alarm condition exists.

 

Alarm Delay: Before an output alarm condition officially exists, the specified

 

limit must be exceeded for this amount of time (in seconds). The advantage of the

 

delay is that it filters out short alarm conditions, which are normal in ATS

 

operation. For example, when utility power is shut off, the ATS will interpret this

 

as a low-voltage condition; however, once the generator begins operation, this

 

alarm is meaningless. An Alarm Delay of more than 15 seconds may prevent

 

display of the low-voltage alarm in this example. The Alarm Delay applies to all

 

Voltage, Loading, Frequency, and Runtime limits.

Alarm Beeper

Once the alarm beeper sounds, it will continue to beep every 30 seconds. Touching any button on the ATS display interface will de-activate the beeper. Use this menu option to turn Off the beeper so that it never sounds when an alarm occurs, or turn On the beeper after you have turned it off. The default is On.

Clearing latched alarms

When an alarm is present, the Alarm LED on the ATS display interface is lit red. To clear latched alarms, you must acknowledge them differently than other alarms. The following are considered latched alarms:

Test Complete-Failed: The system has failed a self-test.

Gen Start Failure: The generator failed to start.

To clear a latched alarm and turn off the LED, choose the Clr Latched Alarms option on the Alarm/Event Log menu of the Alarms screen. You can also clear latched alarms by resetting automatic operation on the ATS. Set the Automatic Operation switch to Disable () and then back to Enable ().

44

InfraStruXure Power Generation System

Page 54
Image 54
American Power Conversion 250 A manual Alarm Beeper, Clearing latched alarms, Fuel Alarm Limits, Other Limits