Vertiv Liebert AC8 User Manual
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Vertiv Liebert AC8 User Manual

Vertiv Liebert AC8 User Manual

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  • Page 1 Liebert® AC8 User Manual...
  • Page 2 Technical Support Site If you encounter any installation or operational issues with your product, check the pertinent section of this manual to see if the issue can be resolved by following outlined procedures. Visit https://www.VertivCo.com/en-us/support/ for additional assistance.

  • Page 3: Table Of Contents

    TABLE OF CONTENTS 1 Introduction 1.1 Methods of Viewing and Configuring the Liebert AC8 1.2 Data Logs 1.3 Transformer Module 1.4 Available Alarms 1.5 Outside Enclosure Overview 1.6 Typical Configuration 1.7 Controller Board Overview 1.8 LED Indicators 1.9 Typical Sequence 2 Installation 2.1 Installation Considerations...
  • Page 4 7.3.3 Define Input as Alarmable or Event 7.3.4 Set Up Alarmable Inputs in Latched or Unlatched Mode 7.3.5 Set Up Delay Time 7.4 Setup System - Setup Common Alarm 7.5 Setup System - Setup Sensor Vertiv | Liebert® AC8 User Manual |...
  • Page 5 7.10 Setup Operation 7.10.1 Turn Automatic Sequencing On or Off 7.10.2 Turn Standby Testing On or Off 7.10.3 Specify Failed Standby Response 7.10.4 Specify Hold Delay Time 7.10.5 Specify Restart Time 7.10.6 Specify Staging Vertiv | Liebert® AC8 User Manual |...
  • Page 6 7.13.2 Clear the Alarm Log 7.13.3 Clear the Event Log 7.13.4 Clear the Trend Logs 8 Specifications 8.1 Liebert AC8 Specifications Appendix A: Service Terminal Interface Appendix B: Default Settings Quick Reference Guide Vertiv | Liebert® AC8 User Manual |...

  • Page 7: Introduction

    The staging feature permits standby devices to be turned on or off when a sensor detects specified levels. For example, the Liebert AC8 might be configured to turn on a fan when the temperature reaches 75°F, then turn on a second fan at 80°F. When the temperature falls below 80°F, the second fan is turned off;...

  • Page 8: Transformer Module

    1.5 Outside Enclosure Overview The Liebert AC8 controller board comes in an enclosure that is 2-3/4" deep and has a built-in liquid crystal display (LCD) and a key lock, as shown in Figure 1.1 below. The enclosure is made of metal to accommodate secure conduit fittings and protect components against environmental debris.

  • Page 9: Typical Configuration

    Figure 1.2 Liebert AC8 enclosure—internal features 1.6 Typical Configuration Figure 1.3 on the next page shows an example of external devices connected to the Liebert AC8 controller board. Up to eight devices may be connected to the eight digital inputs and eight digital outputs.

  • Page 10: Controller Board Overview

    Figure 1.3 Typical Configuration 1.7 Controller Board Overview The Liebert AC8 controller board has connectors for eight digital inputs, four analog inputs, eight digital outputs, two control relay outputs and an EPOP contact input, as shown below. The board comes...
  • Page 11 Vertiv | Liebert® AC8 User Manual |...
  • Page 12 10 minutes. The analog inputs will not be functional during a power loss (P/N 133455P1). Connect Battery on page 85 Indicates the connection status between the Liebert AC8 and C - EIA422 LEDs LED Indicators on page 8 ™...
  • Page 13 Analog Power Jumper analog input jumper voltage. Factory default is 24VDC. page 26 3.0: Wiring and Connections T - SiteScan Web Connection to monitor Liebert AC8 from Liebert’s SiteScan Web™ EIA422 Liebert SiteScan connector (EIA422) graphical monitoring package. Web™ Connector on page 27...

  • Page 14: Led Indicators

    1.8 LED Indicators The Liebert AC8 controller board has LED indicators that show the status of inputs, outputs and the common alarm, as well as the modem, Liebert® SiteScan Web™ and EPOP connections. Vertiv | Liebert® AC8 User Manual |...
  • Page 15 Table 1.2 LED indicators summary Color Description Type 422 TX Green Liebert AC8 is transmitting information over the EIA422 port EIA422 LEDs 422 RX Green Liebert AC8 is receiving information over the EIA422 port EPOP EPOP IN Indicates Emergency Power Operation is open or in alarm...

  • Page 16: Typical Sequence

    1.9 Typical Sequence Figure 1.4 below shows a typical sequence of how the Liebert AC8 functions after detecting a change in a monitored device. Many responses depend on configuration settings. This example shows what happens when a digital input changes state—assuming the input is defined as alarmable—and when the condition returns to normal.

  • Page 17: Installation

    This section provides instructions for installing, mounting and connecting power to the Liebert AC8. 2.1 Installation Considerations The Liebert AC8 must be installed indoors and may be mounted on the surface of a wall or flush-mounted, depending on the user’s application, the location of equipment and sensors to be monitored and the type of wall the unit will be mounted on.

  • Page 18: Surface-Mounting The Liebert Ac8

    Mark the wall for mounting holes, using the back of the unit as a template (see Figure 2.1 on the facing page). 2. Drill holes, if required, to install the four #10 screws that will secure the Liebert AC8 to the wall. Clean up the debris.

  • Page 19: Flush-Mounting The Liebert Ac8

    The rectangular access doors on the top and bottom of the Liebert AC8 must be reversed so they slide the opposite direction. Leaving the doors as shipped from the factory prevents them from being opened when the panel is flush mounted in a wall.

  • Page 20: Mounting The Panel

    3. Use the saw to cut out the marked section of the wall (if not new construction). 4. Rest the Liebert AC8 in the wall and mark where mounting screws will be inserted into the wall studs or other support member.

  • Page 21: Termination And Mounting

    Figure 2.2 below andFigure 2.3 below. TB1 and TB2 are NOT polarity sensitive. 4. Secure the wires to the connector. Figure 2.2 Power wiring to TM115 Figure 2.3 Power wiring to TM230 Vertiv | Liebert® AC8 User Manual |...

  • Page 22: Connecting The Battery Pack

    Liebert AC8 is switched on. NOTE: If the battery is not hooked up BEFORE the Liebert AC8 is switched on, it will trigger an alarm. To connect the battery pack, insert the battery leads into the jumpers as shown at right.

  • Page 23: Wiring And Connections

    3.1 Wiring Specifications Input and output connections to the Liebert AC8 may be made in any order—it is not necessary, for example, to make all input connections before making any output connections. Use copper conductors only for all wiring.
  • Page 24 Liebert Non Plenum - Belden 9461 SiteScan Plenum - Belden 88761 18-22 AWG Stranded & Shielded Communication 22 AWG* (recommended) 3000 ft. (900m) EIA485 Non Plenum - Belden 9461 Plenum - Belden 88761 Vertiv | Liebert® AC8 User Manual |...

  • Page 25: Connecting Digital Inputs And Digital Outputs

    • Input 8 is tied to Output 8 (default name: Device_8) Up to eight devices may be connected to the Liebert AC8. Each device must be connected to an input and an output with the same number. To determine the proper wire size, see Wiring and Connections on page 17.

  • Page 26: Connecting Digital Inputs

    Input 1 and Output 1, another to Input 2 and Output 2, and so on): • Connect a digital input from the Liebert AC8 to the Common Alarm Relay of the environmental unit: terminals 75/76 or TB1-6, TB1-7. •...

  • Page 27: Connecting Digital Outputs

    Each digital output has an associated jumper to define its operation when power is interrupted and there is no battery backup to the board. This puts the Liebert AC8 in a fail-safe mode and ensures proper functioning when the board has no power or battery backup.
  • Page 28 Set the jumper to OFF by placing the black jumper on the middle and top pins. • Set the jumper to ON by placing the black jumper on the middle and bottom pins. Vertiv | Liebert® AC8 User Manual |...

  • Page 29: Connecting Control Relay Outputs

    Turn OFF electrical power to the Liebert AC8. 2. If necessary, remove a conduit knockout to permit wire entry into the Liebert AC8 enclosure. 3. Bring the wire(s) into the Liebert AC8 enclosure through a conduit knockout or access slot.

  • Page 30: Connecting The Emergency Power Operation (Epop) Input

    The EPOP contact input has an associated jumper to enable or disable emergency power operation (EPOP). The Liebert AC8 comes from the factory with the EPOP jumper in the Disabled position (DIS); it may be changed to Enabled (EN). To change the EPOP jumper setting:...

  • Page 31: Connecting Analog Inputs

    DIS for Disabled. 3.3 Connecting Analog Inputs The analog input connector blocks are at the bottom center of the Liebert AC8 printed circuit board, as shown below right. The blocks are two-part assemblies to permit easier connections. To determine the...

  • Page 32: Setting The 12Vdc/24Vdc Analog Power Jumper

    To set the jumper to the 12VDC position, place the black jumper on the middle and left pins. 3.3.2 Connecting the Analog Ground The Liebert AC8 features an analog ground connection for four-wire sensors that have an external power source. Such a four-wire sensor requires a reference to ground because they get power from an external power source.

  • Page 33: Connecting Common Alarm Outputs

    3.4 Connecting Common Alarm Outputs The common alarm relay, found in the top right corner of the Liebert AC8, permits the user to connect auxiliary notification equipment, such as lights, horns and sirens, to the Liebert AC8. To determine the...

  • Page 34: Rs232 Connector

    The RS232 port requires a null modem cable. • Connect one end of the cable to the Liebert AC8’s RS232 port, as shown at right. • Connect the other end to the COM1 port of a laptop computer or video terminal.

  • Page 35: Overview Of Menus

    4 OVERVIEW OF MENUS There are two ways to access the Liebert AC8: the LCD on the front of the enclosure and the Service Terminal Interface, which is accessible through any computer using a communications program. Many viewing and configuration tasks can be performed through either interface, but some are available only through the Service Terminal Interface.
  • Page 36 Table 4.1 Guide to Liebert AC8 functions (continued) Can be performed via: Where to find: Function Service Instructions on Service Terminal Terminal using function screen examples Setup System - Setup Inputs Setup Inputs Setup Inputs page 56 Setup System - Setup Common Alarm...

  • Page 37: Opening Screen Overview

    Logs on page 106 4.1 Opening Screen Overview The Liebert AC8 displays the Opening Screen at startup, as shown in Figure 4.1 on page 33. • If any alarms are active, the Current Alarm screen appears. (Pressing any key on the LCD keypad will silence the audible alarm.)

  • Page 38: Main Menu Overview

    4.3 LCD Menu Overview Figure 4.1 on the facing page shows an overview of the initial screens available through the LCD interface. For comparable information about the Service Terminal Interface screens, see Overview of Menus. Vertiv | Liebert® AC8 User Manual |...
  • Page 39 Figure 4.1 LCD Menu overview Vertiv | Liebert® AC8 User Manual |...
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  • Page 41: View Status Options

    View Input Status • View Operation • View Event Log • View Output Status • View Control Status Figure 5.1 on the next page shows the main options available from the View Status menu. Vertiv | Liebert® AC8 User Manual |...
  • Page 42 Figure 5.1 Menu overview - View Status menu Vertiv | Liebert® AC8 User Manual |...

  • Page 43: View Active Alarms

    To return to the previous screen, press the ESC key. Clearing Active Alarms To clear all active alarms, see Clear Alarms & Logs on page 105. Alarm records are stored in the Alarm Log. Vertiv | Liebert® AC8 User Manual |...

  • Page 44: View Alarm Log

    Viewing Additional Screens There may be up to 99 records of alarm data. • To view additional records, use the arrows  ¯ • To return to the previous screen, press the ESC key. Vertiv | Liebert® AC8 User Manual |...

  • Page 45: Backing Up The Alarm Log (Service Terminal Interface Only)

    5.2.2 Backing Up the Alarm Log (Service Terminal Interface only) The alarm log is stored as a file in the Liebert AC8; it can hold no more than 99 records. When the log is full, the oldest records are deleted from the end of the file as new alarm records are added at the beginning.

  • Page 46: Backing Up The Event Log (Service Terminal Interface Only)

    5.3.2 Backing Up the Event Log (Service Terminal Interface only) The event log is stored as a file in the Liebert AC8; it can hold no more than 99 records. When the log is full, the oldest records are deleted from the end of the file as new event records are added at the beginning.

  • Page 47: View Trend Log

    5.4 View Trend Log The Liebert AC8 takes readings of configured analog input sensors at regular intervals and stores them in four separate trend logs, one for each sensor. The time interval is 30 minutes. Each log contains up to 100 records.

  • Page 48: Backing Up The Trend Log (Service Terminal Interface Only)

    5.4.3 Backing Up the Trend Log (Service Terminal Interface only) The four trend logs are stored as files in the Liebert AC8, with a maximum of 100 records per sensor. When a log is full, the oldest records are deleted from the end of the file as new trend records are added at the beginning.

  • Page 49: View Output Status

    (for example, DEVICE_1 • the current status ( )—values are updated constantly ALARM while being viewed There are eight possible states for a digital output, as shown in Table 5.6 on the next page. Vertiv | Liebert® AC8 User Manual |...
  • Page 50 All output data may be viewed by scrolling beyond the four lines that appear on the LCD at one time: • To view all outputs, use the arrows  ¯ • To return to the previous screen, press the ESC key. Vertiv | Liebert® AC8 User Manual |...

  • Page 51: View Pager Numbers

    5.7 View Pager Numbers The Liebert AC8 may be set up to dial pager numbers when an alarm is detected. Up to four pagers may be configured, as described in Setup System - Setup Modem & Pagers on page 72. The View Pager Numbers option allows you to view the pager numbers and PINs for all configured pagers.

  • Page 52: View Operation

    To change these settings, see the following sections in Setup Operation on page 95: • Turn Automatic Sequencing On or Off on page 96 • Turn Standby Testing On or Off on page 97 • Press ESC to return to the Zone Selection Menu. Vertiv | Liebert® AC8 User Manual |...

  • Page 53: View Control Status

    From the View Status Menu, use the arrows to choose View Control Status, then press Enter. 5.9.1 Control Status The Control Status screen displays the status of each relay. • the name of the output (for example, RELAY 1 • the status ( Vertiv | Liebert® AC8 User Manual |...
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  • Page 55: Silence Alarm & Backup Log Files (Service Terminal Interface)

    Liebert AC8. The LCD does not offer Silence Alarm as a menu item. To silence the alarm remotely through the Service Terminal Interface: • Connect to the Liebert AC8 either from a remote computer or through the RS232 port (see Connecting to the Service Terminal Interface on page 111).

  • Page 56: Back Up Log Files (Service Terminal Interface Only)

    6.2 Back Up Log Files (Service Terminal Interface only) The Liebert AC8 maintains three types of logs—alarm, event and trend—that may be backed up to a remote computer. This feature is available only through the Service Terminal Interface. To back up any of the alarm, event or trend logs:...
  • Page 57 (return to Step3. on the previous page) or press 7 (or Escape) to return to the Main Menu. After backing up a log file, you may want to delete all records in the Liebert AC8’s log of that type. See Clear Alarms & Logs on page 105 for details.
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  • Page 59: System And Control Options

    This menu also provides a vehicle for manually changing the state of an output to ON or OFF, clearing active alarms and deleting records from the Liebert AC8’s alarm log, event log and trend logs. The arrows are used to scroll through the menu. The Enter key is used to select the menu item and enter new information.
  • Page 60 • Clear Alarms & Logs on page 105) Figure 7.1 on the facing page shows the main options available from the System & Control menu. Vertiv | Liebert® AC8 User Manual |...
  • Page 61 Figure 7.1 Menu overview - System and Control menu Vertiv | Liebert® AC8 User Manual |...

  • Page 62: Setup System - Overview

    Unlatched. • You may also specify a time delay before the Liebert AC8 responds to an alarm or event. Use the steps following Table 7.2 on the facing page to change the default settings for any digital input. Vertiv | Liebert® AC8 User Manual |...

  • Page 63: Change Label (Name Of Input)

    To change the input’s label, which may consist of up to eight characters: • Use the arrows to choose a character. • Press Enter to advance to the next character position. • When finished, press Enter again. Vertiv | Liebert® AC8 User Manual |...

  • Page 64: Define Input As Normally Open Or Normally Closed

    From the Setup Inputs Menu, choose Alarm/Event, as shown at right, and press Enter. • To change the type of digital input, use the arrows to choose AL (Alarmable) or EV (Event), then press Enter. Vertiv | Liebert® AC8 User Manual |...

  • Page 65: Set Up Alarmable Inputs In Latched Or Unlatched Mode

    7.3.4 Set Up Alarmable Inputs in Latched or Unlatched Mode Alarmable input points may be set up in Latched mode (Y), which requires the user to clear the Liebert AC8 alarms after an alarm has occurred, or Unlatched mode (N), in which alarms will automatically clear after a return- to-normal state.

  • Page 66: Setup System - Setup Common Alarm

    7.4 Setup System - Setup Common Alarm The audible alarm sounds after the Liebert AC8 detects an alarm condition in any input that has been defined as alarmable, including digital and analog sensor inputs. Once the alarm is silenced, there are two options: •...
  • Page 67 Events are always Unlatched. • You may also specify a time delay before the Liebert AC8 responds to an alarm or event. Use the steps following Table 7.4 on the next page to change the default settings for any analog sensor input.

  • Page 68: Identify The Sensor As Connected

    From the Setup Sensor Menu, choose Connected, as shown at right, and press Enter. • To change this feature, use the arrows to choose Y (Yes - Connected) or N (No - Not connected), then press Enter. Vertiv | Liebert® AC8 User Manual |...

  • Page 69: Change Sensor Label (Name)

    To enter the units label, which may consist of up to three characters: • Use the arrows to choose a character. • Press Enter to advance to the next character position. • When finished, press Enter again. Vertiv | Liebert® AC8 User Manual |...

  • Page 70: Change 4 Ma Value

    Enter. • To change the 20 mA value: • Use the arrows to choose a character. • Press Enter to advance to the next character position. • When finished, press Enter again. Vertiv | Liebert® AC8 User Manual |...

  • Page 71: Change Offset Value

    From the Setup Sensor Menu, choose Alarm/Event, as shown at right, and press Enter. • To change the type of sensor, use the arrows to choose AL (Alarmable) or EV (Event), then press Enter. Vertiv | Liebert® AC8 User Manual |...

  • Page 72: Set Up Alarmable Sensors In Latched Or Unlatched Mode

    7.5.8 Set Up Alarmable Sensors in Latched or Unlatched Mode Alarmable sensor points may be set up in Latched mode (Y), requiring the user to clear the Liebert AC8 alarms after an alarm has occurred, or Unlatched mode (N), meaning that alarms will automatically clear after a return-to-normal state.

  • Page 73: Change High Setpoint

    From the Setup Sensor Menu, choose High Setpt for the selected sensor and press Enter. • To change the High Setpoint: • Use the arrows to choose a character. • Press Enter to advance to the next character position. • When finished, press Enter again. Vertiv | Liebert® AC8 User Manual |...

  • Page 74: Set Up Delay Time

    7.6 Setup System - Setup Zones The Liebert AC8 has four zones that may be used to define different areas—rooms or sections of a room. If set up with four zones, the Liebert AC8 effectively performs as four separate units, controlling each zone separately, for example, using a different rotation sequence for devices in each zone.

  • Page 75: Set Up A Zone

    A single zone may have one to eight outputs associated with it. The minimum number of outputs per zone is one, and the maximum for all zones combined is eight. By default, the Liebert AC8 is configured to have one zone with four outputs: Zone 1 has four associated outputs and Zones 2-4 have none.

  • Page 76: Setup System - Setup Outputs

    Zone 4 7.7 Setup System - Setup Outputs The Liebert AC8 has eight outputs that may be configured individually. These outputs correspond to the eight numbered inputs. For example, Device_1 is the unit connected to Input 1 and to Output 1.

  • Page 77: Define Output As Normally Open Or Normally Closed

    From the Setup Outputs Menu, shown at right, use the arrows to choose Mode for the selected output and press Enter. • To change the output’s mode, use the arrows to choose one of these options: • OP (Operating) • ST (Standby) Vertiv | Liebert® AC8 User Manual |...

  • Page 78: Enable Or Disable An Output Device In Alarm Status

    7.8 Setup System - Setup Modem & Pagers To use the modem and pager features, be sure to connect the phone line connector to a telephone wall jack using an RJ11 cord, as described in Phone Line Connector on page 28. Vertiv | Liebert® AC8 User Manual |...

  • Page 79: Modem Setup - Initialization String

    7.8.1 Modem Setup - Initialization String The Liebert AC8 has an on-board modem that offers dial-up access to all LCD functions as well as features available only through the Service Terminal Interface (see Comparison of Functions: LCD and Service Terminal Interface on page 109).
  • Page 80 (This also requires the modem model MT5600SMI; the model number can be found on the modem label.) Note: For countries that support B5, there is no need to add country codes to the init string. Vertiv | Liebert® AC8 User Manual |...

  • Page 81: Modem Setup - Additional Features (Service Terminal Interface Only)

    • Change modem hang up delay after a call To access these options: • Connect to the Liebert AC8 either from a remote computer or through the RS232 port (see Connecting to the Service Terminal Interface on page 111). • At the Main Menu, enter 0 (zero—Setup System - Login Required).
  • Page 82 Enter Liebert AC8 Phone Number This entry allows you to store the phone number that must be dialed to access the Liebert AC8 for future reference. This has no effect on the Liebert AC8’s modem settings or functionality—it simply places the phone number in an accessible location.
  • Page 83 +GCI=xx, where xx is the country code. (Note: Also requires MT5600SMI modem; model number is on modem label.) Modem Setup - Initialization String on page 73 for more information. Vertiv | Liebert® AC8 User Manual |...

  • Page 84: Pager Setup - Pager Number And Pin

    7.8.3 Pager Setup - Pager Number and PIN The Liebert AC8 may be configured to dial numeric or alphanumeric pagers when an alarm is detected. You may enter up to four pager numbers—all configured pagers will be dialed each time an alarm occurs.
  • Page 85 40 characters. To enter the pager number: • Use the arrows to choose a character. • Press Enter to advance to the next character position. • When finished, press Enter again. Vertiv | Liebert® AC8 User Manual |...

  • Page 86: Pager Setup - Communications Check (Service Terminal Interface Only)

    • Enter time to perform communications check To access these options: • Connect to the Liebert AC8 either from a remote computer or through the RS232 port (see Connecting to the Service Terminal Interface on page 111). • At the Main Menu, enter 0 (zero—Setup System - Login Required).
  • Page 87 Enabling this function permits a daily communications test between the Liebert AC8 and the selected pager. Once each day the Liebert AC8 dials the pager at a specified time and sends this message: “AC8 COMM CHECK.” (The time of the test is specified at the next prompt,...

  • Page 88: Setup System - Setup System Info

    Press Enter to proceed, or Escape to cancel the entry. If you make a change, a confirmation message appears: “Command Successful.” Enter Time To Perform Communications Check This function schedules the daily communications test between the Liebert AC8 and the selected pager, as described in the previous section. •...

  • Page 89: Change Password

    Figure 7.2 below offers a quick look at the Setup System Info screens available via the LCD interface. Figure 7.2 Menu overview - Setup System Info menu 7.9.1 Change Password A password is required to access the Liebert AC8 system and control options, as described in Login on page 53.

  • Page 90: Change Date & Time/Automatic Daylight Saving Time

    7.9.2 Change Date & Time/Automatic Daylight Saving Time The Liebert AC8 has a built-in real-time clock that is backed up by an encapsulated lithium battery and set up to adjust automatically for daylight saving time twice a year. The Setup System Info menu allows you to change the date or time or automatic adjustment at any time.

  • Page 91: Setup Site Id

    7.9.4 Connect Battery By default, the Liebert AC8 checks the battery and sounds an alarm when the power fails, the battery runs low or the battery needs to be checked. The battery’s main purpose is to provide enough power to the modem to notify pagers of a power loss.

  • Page 92: Backup And Upload Configuration File (Service Terminal Interface Only)

    4=RETURN TO SETUP MENU 5=RETURN TO MAIN MENU SELECT A NUMBER:1 6. Enter 1 to back up the configuration file from the Liebert AC8 to the computer and proceed to Step1. on the facing page, Vertiv | Liebert® AC8 User Manual |...
  • Page 93 7. Enter 2 to upload the configuration file from the computer to the Liebert AC8 and proceed to Step1. on the next page. NOTE: This will replace the current configuration settings in the Liebert AC8 with the most recent backup.

  • Page 94: Setup Serv Ph Num - Enter Phone Number

    The Service Phone Number (Serv Ph Num) is used for remote monitoring by Liebert Global Services. The number is designed to allow remote monitoring services to connect to the Liebert AC8. All alarms will be sent to this number. When an alarm occurs, this number is dialed before any of the four pager numbers.

  • Page 95: Setup Serv Ph Num - Communications Check (Service Terminal Interface Only)

    • Enter time to perform communications check To access these options: • Connect to the Liebert AC8 either from a remote computer or through the RS232 port (see Connecting to the Service Terminal Interface on page 111). • At the Main Menu, enter 0 (zero—Setup System - Login Required).
  • Page 96 Enabling this function permits a daily communications test between the Liebert AC8 and the selected service phone number. Once each day the Liebert AC8 dials the service phone number at a specified time and sends this message: “AC8 COMM CHECK.” (The time of the test is specified at the next prompt,...

  • Page 97: Factory Defaults

    Interface only) in Setup System Info for details on backing up settings using the Service Terminal Interface. • Connect to the Liebert AC8 either from a remote computer or through the RS232 port (see Connecting to the Service Terminal Interface on page 111).
  • Page 98 2. The firmware update is a two-step process—this step describes how to upload the file prog###.s19 (where ### is a number—for example, prog118.s19) to the Liebert AC8: a. At the top of the HyperTerminal window, shown below, click on Transfer, then on Send File.

  • Page 99: Initiate Remote Alarm Test (Service Terminal Interface Only)

    The service phone number is used for remote monitoring by Liebert Global Services. The Service Terminal Interface may be used to test communications between the Liebert AC8 and the service modem. This test will send a “DIAL OUT TEST PASSED” message to the service phone number.
  • Page 100 After the “Command Successful” message appears, disconnect from the modem—at the top of the HyperTerminal window, click on Call, then on Disconnect, as shown below. • Wait for the Liebert AC8 to dial out to send a test message. • To verify whether the test was successful, check the Event Log (see View Event Log page 39) for one of these two messages: Dial out test passed or Dial out test failed.

  • Page 101: Setup Operation

    7.10 Setup Operation The Liebert AC8 operation features allow you to set up a rotation sequence to alternate which devices are operating and which are placed on Standby, as well as test devices while in Standby mode and specify what to do when a Standby device goes into alarm as it is powered up. You may specify delay times after...

  • Page 102: Turn Automatic Sequencing On Or Off

    An output device that is Operating is put in Standby mode. When more than one device is in Standby mode or turned On, the Liebert AC8 performs the operations in a sequence that rotates the order. For example, in a sequence set up to occur every two days: •...

  • Page 103: Turn Standby Testing On Or Off

    Standby testing permits scheduling an automatic operational check of devices in Standby mode. When this feature is activated (ON), the Liebert AC8 tests all devices in Standby mode by putting each device in operating mode for a designated time. If an operating unit is designated as disabled on alarm, the unit is turned off during standby testing, then turned on when the test ends.

  • Page 104: Specify Failed Standby Response

    6. When finished, press Enter. 7.10.3 Specify Failed Standby Response The Liebert AC8’s Failed Standby feature determines what happens when an operating device fails and a standby device then becomes an operating unit. A subsequent alarm in the newly operating unit (previously the standby device) results in either restarting the previously operating device that was alarmed or not.

  • Page 105: Specify Hold Delay Time

    When finished, press Enter again. 7.10.5 Specify Restart Time The restart delay timer directs the Liebert AC8 to wait a specified time before changing the state of an output. This feature can prevent needless responses to transient conditions. Vertiv | Liebert® AC8 User Manual |...

  • Page 106: Specify Staging

    Temperature Reaches Target Level: First Device Turned On • When the temperature in Zone 1 reaches 75°F (target plus sensitivity), the Liebert AC8 turns On a cooling unit that has been on standby. Temperature Rises by Sensitivity Increments: Second & Third Devices Turned On •...

  • Page 107: Setup System - Setup I/O Matrix

    7.11 Setup System - Setup I/O Matrix The Setup I/O Matrix menu allows you to configure the Liebert AC8 digital and analog inputs to trigger various actions in either or both of the two control relays. Each relay can be set up to respond to more than one digital or analog input.

  • Page 108: Set Up Mapping For A Digital Input

    Table 7.17 Default mapping of digital inputs to relays Digital input By default, mapped to control relay: Device_1 (none) Device_2 (none) Device_3 (none) Device_4 (none) Device_5 (none) Device_6 (none) Device_7 (none) Device_8 (none) Vertiv | Liebert® AC8 User Manual |...

  • Page 109: Set Up Mapping For An Analog Sensor Input

    Use the Override Output menu, as described in this section, to turn any output ON or OFF. • Use the hardware switch on the Liebert AC8 circuit board to force all eight outputs ON at the same time (see Controller Board Overview on page 4).
  • Page 110 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. Vertiv | Liebert® AC8 User Manual |...

  • Page 111: Clear Alarms & Logs

    7.13 Clear Alarms & Logs The Clear Alarms & Logs menu allows you to clear active alarms or delete all records from any of the Liebert AC8’s three logs: alarm, event and trend logs. To clear alarms or logs: Log In and Choose Clear Alarms & Logs •...

  • Page 112: Clear The Event Log

    Enter. 7.13.4 Clear the Trend Logs The Liebert AC8 maintains a separate trend log for each configured analog input sensor. Each log contains up to 100 records of data collected at regular intervals. You may want to clear the logs after backing up the files or simply to free up space.

  • Page 113: Specifications

    10 minutes at full load Communications Local Communications RS232 Remote Communications Modem (9600-N-8-1) Baud rate 9600 bps, Parity=None, Data bits=8, Stop bits=1 Supported pagers 9600 E-7-1 supports TAPI protocol version 1.8 Liebert SiteScan Web™ IGM Protocol, EIA422 Vertiv | Liebert® AC8 User Manual |...
  • Page 114 Digital Inputs (8) Dry Contact Closure 24VDC, 10 mA 4-20 mA signal input with selectable Analog Inputs (4) power source of 12VDC or 24VDC Digital Outputs (8) 24VAC, 3A Common Alarm Outputs (2) 24VAC, 3A Vertiv | Liebert® AC8 User Manual |...

  • Page 115: Appendix A: Service Terminal Interface

    Appendix A: Service Terminal Interface The Service Terminal Interface allows access to all functions of the Liebert AC8, including some that are not possible through the LCD interface. This interface is accessible through any computer using a ® ® communications program such as Microsoft Windows HyperTerminal.
  • Page 116 Table A.1 Guide to Liebert AC8 functions (continued) Can be performed via: Where to find: Function Service Instructions on Service Terminal Terminal using function screen examples Setup System - Setup Inputs Setup Inputs Setup Inputs page 56 Setup System - Setup Common Alarm...
  • Page 117 Table A.1 Guide to Liebert AC8 functions (continued) Can be performed via: Where to find: Function Service Instructions on Service Terminal Terminal using function screen examples Connect Battery Connect Battery Connect Battery page 85 Backup and Upload Backup and Upload Configuration File...
  • Page 118 3. In the Connection Description window, shown above right, enter a name for the connection— for example, AC8. This becomes the file name (with the extension “.ht”). 4. Click OK to close the window. Vertiv | Liebert® AC8 User Manual |...
  • Page 119 5. In the Connect To window, shown below, select the appropriate connection method from the Connect Using drop-down list: Direct Connection via RS232 • To set up a direct connection via the Liebert AC8’s RS232 port, select COM1 as shown above. This opens the COM1 Properties window. • Proceed to Step (next section).
  • Page 120 (next section). Set Up the Connection’s Properties The following steps are needed for both direct and remote connection to the Liebert AC8. Properties Setup 8. Open the Properties window by clicking on File, then on Properties, as shown below left.
  • Page 121 Verify communications connections between the remote computer and the Liebert AC8: a. For direct connection (via RS232 port): • Connect a null modem cable from the computer’s COM1 port to the Liebert AC8’s RS232 port (for location, see RS232 Connector on page 28).
  • Page 122 Verify modem connections between the remote computer and the Liebert AC8. The remote computer should have connectivity through a telephone line, high-speed cable or an Ethernet. The Liebert AC8 must have a telephone line connected to its RJ11 port (for location, see Phone Line Connector on page 28).
  • Page 123 A.3 Overview of Menus The Main Menu offers choices for viewing the status of the Liebert AC8, silencing the audible alarm and backing up the unit’s log files. It also allows access to the System and Control features, which require a password.
  • Page 124 B=VIEW CONTROL RELAYS STATUS View Control Status on page 127 0=SETUP SYSTEM - LOGIN REQUIRED SELECT A NUMBER:1 View Active Alarms For details on this feature, see View Active Alarms on page 37. View Active Alarms Vertiv | Liebert® AC8 User Manual |...
  • Page 125 DEVICE_7 ALARM CONTACT OPEN BATTERY CHECK BATTERY <ENTER>=MORE <ESC>=EXIT <A>=ALL 1=REFRESH ACTIVE ALARMS 2=RETURN TO MAIN MENU SELECT A NUMBER: View Alarm Log For details on this feature, see View Alarm Log on page 38. Vertiv | Liebert® AC8 User Manual |...
  • Page 126 LOW BATTERY 18-AUG-05 05:23:10 BATTERY BATTERY UNPLUGGED 12-AUG-05 22:47:10 1=REFRESH ALARM LOG 2=RETURN TO MAIN MENU SELECT A NUMBER: View Event Log For details on this feature, see View Event Log on page 39. Vertiv | Liebert® AC8 User Manual |...
  • Page 127 DIAL OUT TEST FAILED 20-OCT-05 05:23:10 MODEM MODEM RESET 18-OCT-05 22:47:10 LIEBERT GLOBAL SERV DIAL OUT TEST PASSED 18-OCT-05 05:23:10 <ENTER>=MORE <ESC>=EXIT <A>=ALL 1=REFRESH EVENT LOG 2=RETURN TO MAIN MENU SELECT A NUMBER: Vertiv | Liebert® AC8 User Manual |...
  • Page 128 View Trend Log For details on this feature, see View Trend Log on page 41. View Trend Log Vertiv | Liebert® AC8 User Manual |...
  • Page 129 SENSOR_1 ------ DEG SENSOR PROBLEM 28-AUG-05 14:15:10 <ENTER>=MORE <ESC>=EXIT <A>=ALL SENSOR_1 65.9 DEG LOW SETPOINT ALARM 28-AUG-05 13:45:10 SENSOR_1 69.9 DEG LOW SETPOINT EVENT 28-AUG-05 13:15:10 SENSOR_1 80.7 DEG HIGH SETPOINT EVENT 28-AUG-05 12:45:10 Vertiv | Liebert® AC8 User Manual |...
  • Page 130 1=VIEW SENSOR_1 DYNAMICALLY 2=VIEW SENSOR_2 DYNAMICALLY 3=VIEW SENSOR_3 DYNAMICALLY 4=VIEW SENSOR_4 DYNAMICALLY 5=REFRESH INPUT & SENSOR STATUS 6=RETURN TO MAIN MENU SELECT A NUMBER:1 VIEW SENSOR_1 DYNAMICALLY SENSOR_1 80.0 DEG PRESS <ESC> KEY TO EXIT Vertiv | Liebert® AC8 User Manual |...
  • Page 131 DEVICE_4    OFF   STANDBY       1    FORCE OFF   = FORCE OFF BY OPERATOR DEVICE_5    OFF   NOT USED      0    HW FORCE ON = FORCE ON BY HARDWARE SWITCH DEVICE_6    OFF   NOT USED      0    PENDING     = PENDING DELAY TIMER DEVICE_7    OFF   NOT USED      0    NOT USED    = DEVICE NOT USED DEVICE_8    OFF   NOT USED      0     ***************************************** 1=REFRESH OUTPUT STATUS 2=RETURN TO MAIN MENU SELECT A NUMBER: View Pager Numbers For details on this feature, see View Pager Numbers on page 45. View Pager Numbers Vertiv | Liebert® AC8 User Manual |...
  • Page 132 PAGER 3 PIN PAGER 4 NUMBER M1,8005551212 PAGER 4 PIN 1=REFRESH PAGER & PIN NUMBERS 2=RETURN TO MAIN MENU SELECT A NUMBER: View Operation For details on this feature, see View Operation on page 46. Vertiv | Liebert® AC8 User Manual |...
  • Page 133 View Control Status For details on this feature, see View Control Status on page 47. View Control Status CONTROL STATUS RELAY    STATUS RELAY 1   OFF RELAY 2   OFF 1=REFRESH CONTROL STATUS 2=RETURN TO MAIN MENU SELECT A NUMBER: Vertiv | Liebert® AC8 User Manual |...
  • Page 134 A=VIEW OPERATION STATUS B=VIEW CONTROL RELAYS STATUS 0=SETUP SYSTEM - LOGIN REQUIRED SELECT A NUMBER:1 Silence Alarm (Service Terminal Interface only) For details on this feature, see Silence Alarm (Service Terminal Interface) on page 49. Vertiv | Liebert® AC8 User Manual |...
  • Page 135 2=RETURN TO MAIN MENU SELECT A NUMBER:1 >ALARM HAS BEEN SILENCED Back Up Log Files (Service Terminal Interface only) For details on this feature, see Back Up Log Files (Service Terminal Interface only) on page 50. Vertiv | Liebert® AC8 User Manual |...
  • Page 136 - SELECT TRANSFER FROM THE TOOLBAR - SELECT RECEIVE FILE - ENTER FOLDER WHERE FILE IS TO BE RECEIVED - SELECT XMODEM FROM THE PROTOCOL BOX - SELECT RECEIVE BUTTON AND ENTER FILE NAME, E.G., ALARM.LOG >BACKUP SUCCESSFUL Vertiv | Liebert® AC8 User Manual |...
  • Page 137 - ENTER FOLDER WHERE FILE IS TO BE RECEIVED - SELECT XMODEM FROM THE PROTOCOL BOX - SELECT RECEIVE BUTTON AND ENTER FILE NAME, E.G., EVENT.LOG >BACKUP SUCCESSFUL Back Up Trend Log Files Backup Log Files - Trend Log Files Vertiv | Liebert® AC8 User Manual |...
  • Page 138 >BACKUP SUCCESSFUL A.6 Setup Menu The Setup menu allows the user to configure the Liebert AC8—setting up inputs and outputs and an input/output matrix to trigger actions, the modem and pagers, and system features such as date and time. This menu also provides a vehicle for manually changing the state of an output to ON or OFF, clearing active alarms and deleting records from the Liebert AC8’s alarm log, event log and trend logs.
  • Page 139 >PRESS <ESC> TO EXIT > • Enter the password, and the Setup Menu appears, as shown in the following section. Setup Menu This section presents Service Terminal Interface screens for each of the following: Vertiv | Liebert® AC8 User Manual |...
  • Page 140 To accept the current setting, press the Enter key. • To change the current setting, enter the value and then press Enter. • Pressing Escape will exit the current setup function or take you to the previous menu screen. Vertiv | Liebert® AC8 User Manual |...
  • Page 141 Setup Inputs For details on this feature, see Setup System - Setup Inputs on page 56. Vertiv | Liebert® AC8 User Manual |...
  • Page 142 >[DEVICE_1] >[] >IS INPUT NORMALLY OPENED(NO) OR NORMALLY CLOSED(NC)? >[NO] >[] >IS INPUT AN ALARM(AL) OR EVENT(EV)? >[EV] >[] >IS ALARM LATCHED-YES(Y) OR NO(N)? >[N] >[] >DELAY TIME BEFORE TRIGGER (MM:SS)? >[00:01] >[] Vertiv | Liebert® AC8 User Manual |...
  • Page 143 2=RETURN TO SETUP MENU 3=RETURN TO MAIN MENU SELECT A NUMBER:1 >RESET COMMON ALARM WITH SILENCE-YES(Y) OR NO(N)? >[N] >[ Setup Sensor For details on this feature, see Setup System - Setup Sensor on page 60. Vertiv | Liebert® AC8 User Manual |...
  • Page 144 >CHANGE 20 mA VALUE(+045.0 TO +096.0). >[+096.0] >[] >CHANGE OFFSET VALUE(-999.9 TO +999.9). >[+000.0] >[] >IS SENSOR AN ALARM(AL) OR EVENT(EV)? >[AL] >[] >IS SENSOR ALARM LATCHED-YES(Y) OR NO(N)? >[Y] >[] >CHANGE LOW SETPOINT. Vertiv | Liebert® AC8 User Manual |...
  • Page 145 5=RETURN TO SETUP MENU 6=RETURN TO MAIN MENU SELECT A NUMBER: ># DEVICES IN ZONE 1 >[4] >[ Setup Output For details on this feature, see Setup System - Setup Outputs on page 70. Vertiv | Liebert® AC8 User Manual |...
  • Page 146 For details on this feature, see Pager Setup - Pager Number and PIN on page 78 and Pager Setup - Communications Check (Service Terminal Interface only)  on page 80. Setup Modem & Pagers - Pager Setup Vertiv | Liebert® AC8 User Manual |...
  • Page 147 >ENTER TIME TO PERFORM COMMUNICATIONS CHECK(HH:MM). (Service Terminal Interface only) >[00:00] >[ >COMMAND SUCCESSFUL Modem Setup For details on this feature, see Modem Setup - Initialization String on page 73 and Modem Setup - Additional Features (Service Terminal Interface only)  on page 75. Vertiv | Liebert® AC8 User Manual |...
  • Page 148 >[ >COMMAND SUCCESSFUL >CHANGE MODEM DIAL PREFIX. (Service Terminal Interface only) >[ATE0X4DT] >[ >COMMAND SUCCESSFUL >CHANGE MODEM HANG UP DELAY AFTER A CALL(99 SEC MAX). (Service Terminal Interface only) >[10] >[ >COMMAND SUCCESSFUL Vertiv | Liebert® AC8 User Manual |...
  • Page 149 3=RETURN TO SETUP MENU 4=RETURN TO MAIN MENU SELECT A NUMBER:1 >ENTER ORIGINAL PASSWORD(MUST BE 4 CHARACTERS). >[****] >ENTER NEW PASSWORD(MUST BE 4 CHARACTERS). >[****] >ENTER NEW PASSWORD AGAIN FOR CONFIRMATION. >[****] >PASSWORD CHANGE SUCCESSFUL Vertiv | Liebert® AC8 User Manual |...
  • Page 150 >SET DATE & TIME(DD-MON-YY HR:MM:SS). >[28-AUG-05 14:45:10] >[ >COMMAND SUCCESSFUL >ENABLE DAYLIGHT SAVINGS TIME-YES(Y) OR NO(N)? >[Y] >[ >COMMAND SUCCESSFUL Setup Site ID For details on this feature, see Setup Site ID on page 85. Setup Site ID Vertiv | Liebert® AC8 User Manual |...
  • Page 151 >COMMAND SUCCESSFUL Backup and Upload Configuration File (Service Terminal Interface only) For details on this feature, see Backup and Upload Configuration File (Service Terminal Interface only)  page 86. Backup & Upload Configuration File - Backup Vertiv | Liebert® AC8 User Manual |...
  • Page 152 - SELECT TRANSFER FROM THE TOOLBAR - SELECT RECEIVE FILE - ENTER FOLDER WHERE FILE IS TO BE RECEIVED - SELECT XMODEM FROM THE PROTOCOL BOX - SELECT RECEIVE BUTTON AND ENTER FILE NAME,E.G., AC8_CONF.SAV >BACKUP SUCCESSFUL Vertiv | Liebert® AC8 User Manual |...
  • Page 153 Setup Service Phone Number For details on this feature, see Setup Serv Ph Num - Enter Phone Number on page 88 and Setup Serv Ph Num - Communications Check (Service Terminal Interface only)  on page 89. Vertiv | Liebert® AC8 User Manual |...
  • Page 154 >ENABLE COMMUNICATIONS CHECK-YES(Y) OR NO(N)? (Service Terminal Interface only) >[N] > >COMMAND SUCCESSFUL >ENTER TIME TO PERFORM COMMUNICATIONS CHECK(HH:MM). (Service Terminal Interface only) >[00:00] >[ >COMMAND SUCCESSFUL Factory Defaults For details on this feature, see Factory Defaults on page 91. Vertiv | Liebert® AC8 User Manual |...
  • Page 155 >SIMULATE AN ALARM CONDITION-YES(Y) OR NO(N)? >[N] >[ >COMMAND SUCCESSFUL Setup Operation For details on this feature, see Setup Operation on page 95. Auto Sequencing For details on this feature, see Turn Automatic Sequencing On or Off on page 96. Vertiv | Liebert® AC8 User Manual |...
  • Page 156 8=RETURN TO MAIN MENU SELECT A NUMBER:1 >AUTO SEQUENCING-TYPE N FOR ON, F FOR OFF >[N] >[N] >COMMAND SUCCESSFUL >EVERY ## DAYS (.5 FOR 12 HOUR) >[03] DAYS >[03] >COMMAND SUCCESSFUL >AT >[00:00] >[00:00] >COMMAND SUCCESSFUL Vertiv | Liebert® AC8 User Manual |...
  • Page 157 Standby Testing For details on this feature, see Turn Standby Testing On or Off on page 97. Setup Operation - Standby Testing Vertiv | Liebert® AC8 User Manual |...
  • Page 158 8=RETURN TO MAIN MENU SELECT A NUMBER:2 >STANDBY TESTING-TYPE N FOR ON, F FOR OFF >[N] >[N] >COMMAND SUCCESSFUL >EVERY ## DAYS >[03] DAYS >[03] >COMMAND SUCCESSFUL >AT >[00:00] >[00:00] >COMMAND SUCCESSFUL >FOR >[10] MIN >[10] Vertiv | Liebert® AC8 User Manual |...
  • Page 159 3=FAILED STANDBY   N 4=HOLD DELAY       10:00 5=RESTART DELAY    00:06 6=STAGING          OFF 7=RETURN TO SETUP MENU 8=RETURN TO MAIN MENU SELECT A NUMBER:3 >IF FAILED STANDBY,IN SAME FAILED ZONE, ENABLE A DISABLED UNIT-YES(Y) OR NO(N)? >[N] >[Y] >COMMAND SUCCESSFUL Vertiv | Liebert® AC8 User Manual |...
  • Page 160 7=RETURN TO SETUP MENU 8=RETURN TO MAIN MENU SELECT A NUMBER:4 >HOLD DELAY (MM:SS) >[10:00] >[10:00] >COMMAND SUCCESSFUL Staging For details on this feature, see Specify Staging on page 100. Setup Operation - Staging Vertiv | Liebert® AC8 User Manual |...
  • Page 161 >STAGING FOR ZONE 1-TYPE N FOR ON, F FOR OFF >[F] >[N] >TARGET VALUE(+045.0 TO +096.0). >[+0070.0] >[] >SENSITIVITY. >[+005.0] >[] >COMMAND SUCCESSFUL Override Output For details on this feature, see Override Output on page 103. Vertiv | Liebert® AC8 User Manual |...
  • Page 162 >[ >COMMAND SUCCESSFUL Clear Alarms & Logs For details on this topic, see Clear Alarms & Logs on page 105. Clear Active Alarms For details on this feature, see Clear Active Alarms on page 105. Vertiv | Liebert® AC8 User Manual |...
  • Page 163 2=CLEAR ALARM LOG 3=CLEAR EVENT LOG 4=CLEAR TREND LOGS 5=RETURN TO SETUP MENU 6=RETURN TO MAIN MENU SELECT A NUMBER:2 >CLEAR ALL RECORDS IN THE ALARM LOG-YES(Y) OR NO(N)? >[N] >[ >COMMAND SUCCESSFUL Vertiv | Liebert® AC8 User Manual |...
  • Page 164 >CLEAR ALL RECORDS IN THE EVENT LOG-YES(Y) OR NO(N)? >[N] >[ >COMMAND SUCCESSFUL Clear the Trend Logs For details on this feature, see Clear the Trend Logs on page 106. Clear Alarms & Logs - Clear the Trend Logs Vertiv | Liebert® AC8 User Manual |...
  • Page 165 SELECT A NUMBER:4 >CLEAR ALL RECORDS IN THE TREND LOGS-YES(Y) OR NO(N)? >[N] >[ >COMMAND SUCCESSFUL Setup I/O Matrix For details on this feature, see Setup System - Setup I/O Matrix on page 101. Vertiv | Liebert® AC8 User Manual |...
  • Page 166 7=SENSOR_4 HIGH STPT   N N 8=DEVICE_8   N N 8=SENSOR_4 LOW STPT   N N 0=RETURN TO SETUP I/O MATRIX 9=RETURN TO SETUP I/O MATRIX I=RETURN TO SETUP MENU 0=RETURN TO SETUP MENU SELECT A NUMBER:1 SELECT A NUMBER:1 Vertiv | Liebert® AC8 User Manual |...
  • Page 167 >[Y] >[N] >[ >[ >COMMAND SUCCESSFUL >COMMAND SUCCESSFUL >MAP DEVICE_1 TO RELAY 2-YES(Y) OR NO >MAP SENSOR_1 HIGH STPT TO RELAY 2-YES(Y) OR (N)? NO(N)? >[N] >[N] >[ >[ >COMMAND SUCCESSFUL >COMMAND SUCCESSFUL Vertiv | Liebert® AC8 User Manual |...
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  • Page 169: Appendix B: Default Settings Quick Reference Guide

    Appendix B: Default Settings Quick Reference Guide This appendix provides a quick reference to default settings for the Liebert AC8. These settings also appear throughout the manual. Table B.1 Liebert AC8 - default settings for inputs and outputs DEFAULT SETTINGS - DIGITAL INPUTS (FROM Table 7.2 on page 57)
  • Page 170 Digital output loss-of-power jumpers OFF - Normally Open ON - Normally Closed NOTE: The jumper position has no effect on the contact when the Liebert AC8 has power. 12VDC/24VDC analog input jumper 24VDC Acceptable voltage for all four two-wire analog sensors...
  • Page 171 Table B.2 Liebert AC8 - other default settings (continued) Any string (up to 40 characters); for international ATS0=1 Initialization String (InitString) dialing, add +GCI=xx, where xx is the country code (except B5 countries—see Table 7.9 on page 75) Enable Modem Diagnostic Messages...
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  • Page 174 VertivCo.com | Vertiv Headquarters, 1050 Dearborn Drive, Columbus, OH, 43085, USA © 2017 Vertiv Co. All rights reserved. Vertiv and the Vertiv logo are trademarks or registered trademarks of Vertiv Co. All other names and logos referred to are trade names, trademarks or registered trademarks of their respective owners. While every precaution has been taken to ensure accuracy and completeness herein, Vertiv Co.

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