Liebert AC4 user manual Turn Automatic Sequencing On or Off, Activate / Deactivate

Page 49

System and Control Options

7.8.1Turn Automatic Sequencing On or Off

Use automatic sequencing to set up a schedule for rotation of redundant devices. For example, three devices might be in operating mode while a fourth device is in standby mode. Every two days, the AC4 returns the standby device to operating mode and places one of the operating devices on standby.

When zones are used, the AC4 manages the rotation sequence for each zone separately, so each zone might have one device in operating mode and one in standby mode.

Auto sequencing is OFF (deactivated) by default. When auto sequencing is activated (ON or 12h, for a

12-hour interval), the AC4 cycles devices at the specified interval and time of day as follows:

•An output device in Standby mode is returned to Operating mode.

•An output device that is Operating is put in Standby mode.

When more than one device is in Standby mode or turned On, the AC4 performs the operations in a sequence that rotates the order. For example, in a sequence set up to occur every two days:

• Monday:

Device 1 is placed on Standby, and Devices 2, 3 and 4 operate.

• Wednesday:

Device 2 is placed on Standby, and Devices 1, 3 and 4 operate.

• Friday:

Device 3 is placed on Standby, and Devices 1, 2 and 4 operate.

• Sunday:

Device 4 is placed on Standby, and Devices 1, 2 and 3 operate.

NOTE

The AC4 will not cycle outputs that have been manually forced On or Off through the Override Output Menu or the hardware switch (see 7.9 - Override Output).

To change the auto sequencing settings:

1.

From the Setup System Operation Menu, use the arrows ↑↓ to

 

choose Auto Sequencing, then press Enter ↵ .

2.

In the Activate / Deactivate screen, use the arrows ↑↓ to choose one

 

of three options:

a.ON for intervals of every 1 to 99 days, then press Enter ↵ and proceed to Step 3.

b.12h for an interval of every 12 hours, then press Enter ↵ and proceed to Step 4.

c.OFF to deactivate auto sequencing, then press Enter ↵ to return to the previous menu.

3.Select the interval for how often the sequencing should occur in the Every 03 Days field. The default is 3 days; valid entries range from 0 to 99 days.

• For each digit, use the arrows ↑↓ to choose a number from 0 to 9, then press Enter ↵ to advance to the next digit.

•When finished, press Enter ↵ to set the time of day.

4.Specify the time of day the sequencing should begin in the At 00:00 field. The format is HH:MM for hours and minutes.

•Use the arrows ↑↓ to choose from available entries for hours (00-23), then press Enter ↵ to advance to minutes.

•Use the arrows ↑↓ to select minutes (00-59).

•When finished, press Enter ↵ again.

Setup Operation Menu

> AUTO SEQUENCING OFF

STANDBY TESTING OFF FAILED STANDBY N ↑↓ =NEXT ↵ =SELECT

HOLD DELAY

:

10:00

RESTART

:

00:06

Activate / Deactivate

> AUTO SEQUENCING OFF

↑↓ =NEXT ↵ =EDIT

Set Interval & Start Time (1- to 99-Day Interval)

>AUTO SEQUENCING ON EVERY 03 DAYS

AT 00:00

↑↓ =NEXT ↵ =EDIT

Set Start Time

(12-Hour Interval)

> AUTO SEQUENCING 12h

AT 00:00

↵ =EDIT

↑↓ =NEXT

43

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Contents Monitoring AC4Page Table of Contents Setup System Setup Common Alarm 7.5 Setup System Setup Zones Setup Menu Appendix a Service Terminal InterfaceFigures Available Alarms Methods of Viewing and Configuring the AC4Data Logs IntroductionOutside Enclosure Overview LCD for configurationOperation Device Liebert Challenger Typical ConfigurationDevice RS232 Liebert Himod Controller board components Controller Board OverviewDIP switch Connector RS232LCD connector 24VAC powerLED indicators summary LED IndicatorsOutput LEDs Status LEDs Input LEDs Typical Sequence Installation Installation ConsiderationsPacking Contents Unpacking and Preliminary InspectionRequired tools Surface-Mounting the AC4Mounting the Panel Flush-Mounting the AC4 Electrical connections to panel Connect Power to the AC4Wiring and Connections Wiring SpecificationsWiring specifications Connecting Liebert Environmental Units Connecting Digital Inputs and OutputsConnecting Digital Inputs Connecting Digital OutputsRS232 Connector Connecting Common Alarm OutputsSetting the Digital Output Jumpers Digital output jumper settingsGuide to AC4 functions Overview of MenusMain Menu Overview Opening Screen OverviewLCD Menu Overview View Status Options Active Alarms View Active AlarmsClearing Active Alarms Active AlarmsAlarm Log View Alarm LogAlarm log conditions Alarm LogEvent Log View Event LogEvent log conditions Event LogInput Status View Input StatusViewing Additional Input Data Digital input statesOutput Status View Output StatusViewing Additional Output Data Digital output statesSilence Alarm Service Terminal Interface only Silence Alarm & Backup LOG Files Service Terminal InterfaceBack Up Log Files Service Terminal Interface only Silence Alarm & Backup Log Files Service Terminal Interface Login LoginSystem and Control Options Valid characters for data entrySystem & Control menu Clear Alarms&Logs selected Login ScreenSetup System menu Clear Alarms/Logs menuSetup System Setup Inputs Setup System OverviewChange Label Name of Input Define Input as Alarmable or EventDefine Input as Normally Open or Normally Closed Set Up Delay Time Set Up Alarmable Inputs in Latched or Unlatched ModeDelay Time Latched / UnlatchedChange to Reset Y or Not Reset N Setup System Setup Common AlarmReset Common Alarm Set Up a Zone Setup System Setup ZonesMessage if too few devices entered Message if too many devices enteredDefine Output as Normally Open or Normally Closed Setup System Setup OutputsEnable or Disable an Output Device in Alarm Status Define Operating or Standby ModeConfigure Output for Loss of Power Fail-Safe Set ModeChange Password Setup System Setup System InfoChange the Password Reset Password to the Factory Default AaaaSetup Site ID Setup Site IDSet Date & Time/Automatic Daylight Saving Time Set Date & TimeBackup and Upload Configuration File Back Up the Configuration File Upload the Configuration File Factory Defaults Factory DefaultsFirmware Update Service Terminal Interface only System and Control Options Select Setup Operation Setup System Menu Setup OperationSetup Operation Menu Default settings operation featuresActivate / Deactivate Turn Automatic Sequencing On or OffSet Interval & Start Time 1- to 99-Day Interval Set Start Time Hour IntervalChange Standby Testing Turn Standby Testing On or OffSpecify Failed Standby Response Failed Standby responseHold Delay Time Specify Hold Delay TimeSetup Operation Menu Restart Delay TimeOverride Output Clear Active Alarms Clear Alarms & LogsClear the Alarm Log Clear the Event LogSpecifications AC4 SpecificationsComparison of Functions LCD and Service Terminal Interface Appendix a Service Terminal InterfaceConnecting to the Service Terminal Interface Create a Connection COM1 Port SetupSpecify COM Port Connection Ascii Setup Properties SetupSettings tab Ascii Setup buttonClick on the file name for example, AC4.ht Connect to the Service Terminal InterfaceSetup Menu Overview Silence Alarm and Backup Log FilesView Status Overview Main Menu For sample screens, seeMain Menu View Status MenusMain Menu View Active Alarms View Active AlarmsView Alarm Log View Alarm LogView Event Log View Event LogView Input Status View Input StatusView Output Status View Output StatusSection A.5.1 Section A.5.2 Silence AlarmBackup Log Files Alarm Log File Back Up Alarm Log FileBackup Log Files Event Log File Back Up Event Log FileLogin Menu Setup MenuLogin Setup Menu Setup MenuTips on Using the Service Terminal Interface See DescriptionSetup Inputs Setup InputsSetup Common Alarm Setup Common AlarmSetup Zones Setup ZonesSetup Outputs Setup OutputsSetup System Info Setup System InfoChange Password Set Date & Time Setup Site IDBackup & Upload Configuration File Backup Factory Defaults Backup & Upload Configuration File UploadFirmware Update Firmware Update Service Terminal Interface onlySetup Operation Auto Sequencing Setup OperationAuto Sequencing Setup Operation Standby Testing Standby TestingSetup Operation Failed Standby Hold DelaySetup Operation Hold Delay Failed StandbySetup Operation Restart Delay Restart DelayOverride Output Override OutputClear Alarms & Logs Clear Active Alarms Clear Alarms & LogsClear Alarms & Logs Clear the Alarm Log Clear Alarms & Logs Clear the Event Log Page Company Behind the Products Technical Support/ServiceLocations Asia 23F, Allied Kajima Bldg
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AC4 specifications

The Liebert AC4 is a highly advanced cooling solution designed for critical environments, such as data centers and telecommunications facilities. As data demands rise and IT equipment generates significant heat, an effective cooling system is paramount to maintaining optimal performance and reliability. The Liebert AC4 stands out in this space, offering a blend of efficiency, flexibility, and innovative technology.

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