Liebert Methods of Viewing and Configuring the AC4, Data Logs, Available Alarms, Introduction

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Introduction

1.0INTRODUCTION

The Liebert AC4 is ideal for coordinated control of systems with redundant equipment, such as multiple environmental units or pumps. When the AC4 controller detects an alarm in an operating device, the AC4 enables a standby device and controls the device in alarm as configured, either leaving that device operating or disabling it.

The AC4 controller can also balance usage of devices by rotating units through Operating and Standby modes according to a user-defined schedule. This helps keep redundant equipment operating efficiently and only when needed. The AC4 can perform routine testing of standby devices and alert personnel if a standby device fails an operating test and requires attention.

Another capability of the AC4 is monitoring the status of connected devices and keeping personnel apprised through local alarming.

The AC4 controller can interface with anything that closes an electrical contact. To improve process efficiency and troubleshooting, the controller tracks data in two types of logs: alarm and event. The AC4 has a local LCD interface and an RS232 interface.

When an alarm condition arises, the AC4 displays alarm information, sounds an audible alarm, changes the state of the common alarm relay and turns connected devices on or off according to user configuration. See 1.5 - Typical Configuration for a more detailed example.

1.1Methods of Viewing and Configuring the AC4

The AC4 features access through two interfaces that allow users to configure the unit, silence alarms, back up logs, and perform many other functions to keep a large or small operation running smoothly and safely.

•LCD—liquid crystal display on the front of the panel

•Service Terminal Interface—accessible via a computer connected directly to an RS232 port

These interfaces permit easy access and configuration of the AC4, allowing users to view data, silence alarms and have full access to information stored in the controller, including logs of alarms and events.

1.2Data Logs

The two types of data logs—alarm history and event history—can be viewed on the LCD on the front of the AC4 or the Service Terminal Interface. The logs may also be downloaded to a computer through the Service Terminal Interface.

1.3Available Alarms

The alarms available with the AC4 are:

•Discrete input alarm (for each digital input)

•Loss of power

•No standby available

•Standby device failed

•No restart available

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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 Introduction Methods of Viewing and Configuring the AC4Available Alarms Data LogsOutside Enclosure Overview LCD for configurationOperation Device Liebert Challenger Typical ConfigurationDevice RS232 Liebert Himod Controller board components Controller Board Overview24VAC power Connector RS232DIP switch LCD connectorLED indicators summary LED IndicatorsOutput LEDs Status LEDs Input LEDs Typical Sequence Unpacking and Preliminary Inspection Installation ConsiderationsInstallation Packing ContentsRequired 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 Digital Outputs Connecting Digital Inputs and OutputsConnecting Liebert Environmental Units Connecting Digital InputsDigital output jumper settings Connecting Common Alarm OutputsRS232 Connector Setting the Digital Output JumpersGuide to AC4 functions Overview of MenusMain Menu Overview Opening Screen OverviewLCD Menu Overview View Status Options Active Alarms View Active AlarmsActive Alarms Clearing Active AlarmsAlarm Log View Alarm LogAlarm Log Alarm log conditionsEvent Log View Event LogEvent Log Event log conditionsDigital input states View Input StatusInput Status Viewing Additional Input DataDigital output states View Output StatusOutput Status Viewing Additional Output DataSilence 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 Valid characters for data entry LoginLogin System and Control OptionsClear Alarms/Logs menu Login ScreenSystem & Control menu Clear Alarms&Logs selected Setup System menuSetup System Setup Inputs Setup System OverviewChange Label Name of Input Define Input as Alarmable or EventDefine Input as Normally Open or Normally Closed Latched / Unlatched Set Up Alarmable Inputs in Latched or Unlatched ModeSet Up Delay Time Delay TimeChange to Reset Y or Not Reset N Setup System Setup Common AlarmReset Common Alarm Message if too many devices entered Setup System Setup ZonesSet Up a Zone Message if too few devices enteredDefine Output as Normally Open or Normally Closed Setup System Setup OutputsSet Mode Define Operating or Standby ModeEnable or Disable an Output Device in Alarm Status Configure Output for Loss of Power Fail-SafeReset Password to the Factory Default Aaaa Setup System Setup System InfoChange Password Change the PasswordSet Date & Time Setup Site IDSetup Site ID Set Date & Time/Automatic Daylight Saving 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 Default settings operation features Setup OperationSelect Setup Operation Setup System Menu Setup Operation MenuSet Start Time Hour Interval Turn Automatic Sequencing On or OffActivate / Deactivate Set Interval & Start Time 1- to 99-Day IntervalFailed Standby response Turn Standby Testing On or OffChange Standby Testing Specify Failed Standby ResponseRestart Delay Time Specify Hold Delay TimeHold Delay Time Setup Operation MenuOverride Output Clear the Event Log Clear Alarms & LogsClear Active Alarms Clear the Alarm 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 button Properties SetupAscii Setup Settings tabClick on the file name for example, AC4.ht Connect to the Service Terminal InterfaceMain Menu For sample screens, see Silence Alarm and Backup Log FilesSetup Menu Overview View Status OverviewMain 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 AlarmBack Up Event Log File Back Up Alarm Log FileBackup Log Files Alarm Log File Backup Log Files Event Log FileLogin Menu Setup MenuLogin See Description Setup MenuSetup Menu Tips on Using the Service Terminal InterfaceSetup 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 TestingFailed Standby Hold DelaySetup Operation Failed Standby Setup Operation Hold DelaySetup 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 Asia 23F, Allied Kajima Bldg Technical Support/ServiceCompany Behind the Products Locations
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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.

One of the main features of the Liebert AC4 is its adaptability to various configurations and applications. It can be deployed in both hot aisle and cold aisle containment setups, making it versatile for different data center designs. This flexibility allows facilities to implement cooling strategies that align perfectly with their specific layouts and operational requirements.

The Liebert AC4 employs cutting-edge, variable-speed fans that enhance energy efficiency. These fans adjust their speed according to the cooling load, ensuring that the system operates at peak efficiency while significantly reducing energy consumption. This feature is essential in critical environments, where minimizing operational costs is often as important as maintaining optimal temperatures.

In addition to energy-efficient cooling, the Liebert AC4 integrates advanced monitoring and control technologies. With built-in intelligence and compatibility with the Liebert SiteScan monitoring system, users can ensure real-time visibility into their cooling operations. This monitoring capability enables data center managers to make informed decisions and swiftly address any cooling anomalies, minimizing the risk of overheating and downtime.

Furthermore, the system is designed to be easy to install and maintain, reducing downtime during setup and upkeep. The modular design allows for scalability, enabling organizations to expand their cooling capabilities as their needs grow.

The Liebert AC4 also features a robust construction that enhances reliability and durability, making it an ideal choice for environments where equipment uptime is critical. Its streamlined design not only optimizes airflow and cooling distribution but also contributes to aesthetic considerations in professional settings.

In conclusion, the Liebert AC4 combines efficiency, versatility, and advanced technologies to deliver a reliable cooling solution for modern data centers and critical facilities. Its variable-speed fans, flexible configurations, and advanced monitoring capabilities position it as a leader in the competitive field of cooling solutions, ensuring that critical equipment remains operational and efficient. Organizations looking to enhance their cooling strategies will find the Liebert AC4 to be an invaluable asset in today’s fast-paced digital landscape.
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