Liebert AC4 user manual Override Output

Page 52

System and Control Options

7.9Override Output

The Override Output feature allows you to manually change the state of any digital output to ON or OFF, overriding automatic control by the AC4 (the default setting for all outputs). This menu also allows you to release the manual override, returning any output to automatic control.

There are two ways to override automatic control of outputs:

•Use the Override Output menu, as described in this section, to turn any output ON or OFF.

•Use the hardware switch on the circuit board to force all four outputs ON at the same time (see Item F - Manual Override Switch (outputs) in 1.6 - Controller Board Overview).

After an output is forced manually ON or OFF, it remains in that state until returned to automatic control through this menu.

Table 20 summarizes the four types of control, including the abbreviated message that appears on the LCD and in log reports.

Table 20 Automatic / manual control - output points

Message

 

Description

 

 

 

AUTO

Automatic

Controlled by AC4

(default for all outputs)

 

 

FORCE ON

Manually ON

This output has been forced ON

 

 

(operating) or OFF via the Override

FORCE OFF

Manually OFF

Output menu

 

 

 

 

 

All outputs have been forced ON

 

Manually ON

(operating) via the hardware switch on

HW FORCE ON

the circuit board (see Item F - Manual

(all outputs)

 

Override Switch (outputs) in 1.6 -

 

 

 

 

Controller Board Overview)

 

 

 

To force an output point ON or OFF or return it to automatic control:

Log In and Choose Override Output

• From the Main Menu, use the arrows ↑↓ to choose System and Control, then press Enter ↵ (see 7.1 - Login for help).

• Enter your password at the Login screen.

• From the System and Control Menu, use the arrows ↑↓ to choose Override Output, then press Enter ↵ .

Select an Output

The Select Output menu, shown at right, displays the current status of all four outputs.

•Use the arrows ↑↓ to choose the output you want—for example, Device_1—and press Enter ↵ .

Turn Output ON or OFF / Return to Automatic

• From the Override Output menu, use the arrows ↑↓ to choose one of these options:

•AUTO - return to automatic control

•FORCE ON - manually turn this output ON (operating)

•FORCE OFF - manually turn this output OFF

•Press Enter ↵ .

Main Menu

VIEW STATUS

> SYSTEM AND CONTROL

↑↓ =NEXT

↵ =SELECT

Login

LOGIN

AAAA

↑↓ =SELECT ↵ =NEXT/END

System & Control Menu

SETUP SYSTEM

>OVERRIDE OUTPUT

CLEAR ALARMS & LOGS ↑↓ =NEXT ↵ =SELECT

Select Output

OVERRIDE OUTPUT

> DEVICE_1 AUTO DEVICE_2 AUTO ↑↓ =NEXT ↵ =SELECT

DEVICE_3 AUTO DEVICE_4 FORCE ON

Override Output

SELECT DEVICE_1

FORCE ON ↑↓ =SELECT ↵ =END

46

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Contents AC4 MonitoringPage Table of Contents Setup System Setup Common Alarm 7.5 Setup System Setup Zones Appendix a Service Terminal Interface Setup MenuFigures Methods of Viewing and Configuring the AC4 Available AlarmsData Logs IntroductionOutside Enclosure Overview LCD for configurationOperation Device Liebert Challenger Typical ConfigurationDevice RS232 Liebert Himod Controller Board Overview Controller board componentsConnector RS232 DIP switchLCD connector 24VAC powerLED indicators summary LED IndicatorsOutput LEDs Status LEDs Input LEDs Typical Sequence Installation Considerations InstallationPacking Contents Unpacking and Preliminary InspectionRequired tools Surface-Mounting the AC4Mounting the Panel Flush-Mounting the AC4 Connect Power to the AC4 Electrical connections to panelWiring and Connections Wiring SpecificationsWiring specifications Connecting Digital Inputs and Outputs Connecting Liebert Environmental UnitsConnecting Digital Inputs Connecting Digital OutputsConnecting Common Alarm Outputs RS232 ConnectorSetting the Digital Output Jumpers Digital output jumper settingsOverview of Menus Guide to AC4 functionsMain Menu Overview Opening Screen OverviewLCD Menu Overview View Status Options View Active Alarms Active AlarmsClearing Active Alarms Active AlarmsView Alarm Log Alarm LogAlarm log conditions Alarm LogView Event Log Event LogEvent log conditions Event LogView Input Status Input StatusViewing Additional Input Data Digital input statesView Output Status Output StatusViewing Additional Output Data Digital output statesSilence Alarm & Backup LOG Files Service Terminal Interface Silence Alarm Service Terminal Interface onlyBack Up Log Files Service Terminal Interface only Silence Alarm & Backup Log Files Service Terminal Interface Login LoginSystem and Control Options Valid characters for data entryLogin Screen System & Control menu Clear Alarms&Logs selectedSetup System menu Clear Alarms/Logs menuSetup System Overview Setup System Setup InputsChange Label Name of Input Define Input as Alarmable or EventDefine Input as Normally Open or Normally Closed Set Up Alarmable Inputs in Latched or Unlatched Mode Set Up Delay TimeDelay Time Latched / UnlatchedChange to Reset Y or Not Reset N Setup System Setup Common AlarmReset Common Alarm Setup System Setup Zones Set Up a ZoneMessage if too few devices entered Message if too many devices enteredSetup System Setup Outputs Define Output as Normally Open or Normally ClosedDefine Operating or Standby Mode Enable or Disable an Output Device in Alarm StatusConfigure Output for Loss of Power Fail-Safe Set ModeSetup System Setup System Info Change PasswordChange 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 Setup Operation Select Setup Operation Setup System MenuSetup Operation Menu Default settings operation featuresTurn Automatic Sequencing On or Off Activate / DeactivateSet Interval & Start Time 1- to 99-Day Interval Set Start Time Hour IntervalTurn Standby Testing On or Off Change Standby TestingSpecify Failed Standby Response Failed Standby responseSpecify Hold Delay Time Hold Delay TimeSetup Operation Menu Restart Delay TimeOverride Output Clear Alarms & Logs Clear Active AlarmsClear the Alarm Log Clear the Event LogAC4 Specifications SpecificationsAppendix a Service Terminal Interface Comparison of Functions LCD and Service Terminal InterfaceConnecting to the Service Terminal Interface Create a Connection COM1 Port SetupSpecify COM Port Connection Properties Setup Ascii SetupSettings tab Ascii Setup buttonConnect to the Service Terminal Interface Click on the file name for example, AC4.htSilence Alarm and Backup Log Files Setup Menu OverviewView 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 StatusSilence Alarm Section A.5.1 Section A.5.2Back Up Alarm Log File Backup Log Files 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 Setup Site ID Set Date & TimeBackup & Upload Configuration File Backup Backup & Upload Configuration File Upload Factory DefaultsFirmware Update Service Terminal Interface only Firmware UpdateSetup Operation Auto Sequencing Setup OperationAuto Sequencing Standby Testing Setup Operation Standby TestingHold Delay Setup Operation Failed StandbySetup Operation Hold Delay Failed StandbyRestart Delay Setup Operation 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 Technical Support/Service Company Behind the ProductsLocations 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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