Emerson AC4 User Manual

Infrastructure Management & Monitoring For Business-Critical Continuity™
Liebert® AC4
User Manual
1.0 INTRODUCTION
1.1 Methods of Viewing and Configuring the Liebert AC4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.2 Data Logs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.3 Available Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.4 Outside Enclosure Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.5 Typical Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.6 Controller Board Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.7 LED Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.8 Typical Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.0 INSTALLATION
2.1 Installation Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.1.1 Unpacking and Preliminary Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.2 Surface-Mounting the Liebert AC4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.2.1 Mounting the Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.3 Flush-Mounting the Liebert AC4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.3.1 Mounting the Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.4 Connect Power to the Liebert AC4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.0 WIRING AND CONNECTIONS
3.1 Wiring Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.2 Connecting Digital Inputs and Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.2.1 Connecting Digital Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.2.2 Connecting Digital Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.2.3 Setting the Digital Output Jumpers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.3 Connecting Common Alarm Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.4 RS232 Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.0 OVERVIEW OF MENUS
4.1 Opening Screen Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.2 Main Menu Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.3 LCD Menu Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5.0 VIEW STATUS OPTIONS
5.1 View Active Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5.1.1 Active Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5.2 View Alarm Log . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5.2.1 Alarm Log . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5.2.2 Backing Up the Alarm Log (Service Terminal Interface only) . . . . . . . . . . . . . . . . . . . . . . . . . 20
5.3 View Event Log. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
5.3.1 Event Log . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
5.3.2 Backing Up the Event Log (Service Terminal Interface only) . . . . . . . . . . . . . . . . . . . . . . . . . 21
5.4 View Input Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
5.4.1 Input Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
5.5 View Output Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5.5.1 Output Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
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6.0 SILENCE ALARM & BACKUP LOG FILES (SERVICE TERMINAL INTERFACE)
6.1 Silence Alarm (Service Terminal Interface) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
6.2 Back Up Log Files (Service Terminal Interface only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
7.0 SYSTEM AND CONTROL OPTIONS
7.1 Login . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
7.2 Setup System - Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
7.3 Setup System - Setup Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
7.3.1 Change Label (Name of Input) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
7.3.2 Define Input as Normally Open or Normally Closed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
7.3.3 Define Input as Alarmable or Event . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
7.3.4 Set Up Alarmable Inputs in Latched or Unlatched Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
7.3.5 Set Up Delay Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
7.4 Setup System - Setup Common Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
7.5 Setup System - Setup Zones . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
7.5.1 Set Up a Zone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
7.6 Setup System - Setup Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
7.6.1 Define Output as Normally Open or Normally Closed. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
7.6.2 Define Operating or Standby Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
7.6.3 Enable or Disable an Output Device in Alarm Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
7.6.4 Configure Output for Loss of Power (“Fail-Safe”) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
7.7 Setup System - Setup System Info . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
7.7.1 Change Password . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
7.7.2 Set Date & Time/Automatic Daylight Saving Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
7.7.3 Setup Site ID. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
7.7.4 Backup and Upload Configuration File (Service Terminal Interface only) . . . . . . . . . . . . . . . 38
7.7.5 Factory Defaults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
7.7.6 Perform Firmware Update (Service Terminal Interface only) . . . . . . . . . . . . . . . . . . . . . . . . . 41
7.8 Setup Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
7.8.1 Turn Automatic Sequencing On or Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
7.8.2 Turn Standby Testing On or Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
7.8.3 Specify Failed Standby Response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
7.8.4 Specify Hold Delay Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
7.8.5 Specify Restart Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
7.9 Override Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
7.10 Clear Alarms & Logs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
7.10.1 Clear Active Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
7.10.2 Clear the Alarm Log . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
7.10.3 Clear the Event Log . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
8.0 SPECIFICATIONS
8.1 Liebert AC4 Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
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APPENDIX A-SERVICE TERMINAL INTERFACE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
A.1 Comparison of Functions: LCD and Service Terminal Interface. . . . . . . . . . . . . . . . . . . . . . 51
A.2 Connecting to the Service Terminal Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
A.2.1 Create a Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
A.2.2 Connect to the Service Terminal Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
A.3 Overview of Menus. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
A.3.1 View Status Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
A.3.2 Silence Alarm and Backup Log Files. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
A.3.3 Setup Menu Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
A.4 View Status Menus. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
A.4.1 View Active Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
A.4.2 View Alarm Log . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
A.4.3 View Event Log. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
A.4.4 View Input Status. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
A.4.5 View Output Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
A.5 Silence Alarm & Back Up Log Files (Service Terminal Interface only). . . . . . . . . . . . . . . . . 61
A.5.1 Silence Alarm (Service Terminal Interface only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
A.5.2 Back Up Log Files (Service Terminal Interface only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
A.6 Setup Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
A.6.1 Setup Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
A.6.2 Setup Common Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
A.6.3 Setup Zones. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
A.6.4 Setup Outputs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
A.6.5 Setup System Info. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
A.6.6 Setup Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
A.6.7 Override Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
A.6.8 Clear Alarms & Logs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
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FIGURES
Figure 1 Liebert AC4 enclosure—external features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Figure 2 Liebert AC4 enclosure—internal features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Figure 3 Typical Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Figure 4 Example of typical sequence. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Figure 5 Mounting dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Figure 6 Electrical connections to panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Figure 7 LCD Menu overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Figure 8 Menu overview - View Status menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Figure 9 Menu overview - System and Control menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
TABLES
Table 1 Controller board components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Table 2 LED indicators summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Table 3 Packing manifest. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Table 4 Wiring specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Table 5 Digital output jumper settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Table 6 Guide to Liebert AC4 functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Table 7 Primary Functions Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Table 8 Alarm log conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Table 9 Event log conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Table 10 Digital input states . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Table 11 Digital output states . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Table 12 Valid characters for data entry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Table 13 Default settings - digital inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Table 14 Input and output labels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Table 15 Default zones . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Table 16 Possible combinations - outputs per zone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Table 17 Default settings - digital outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Table 18 Default settings - operation features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Table 19 Failed Standby response. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Table 20 Automatic / manual control - output points. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Table 21 Guide to Liebert AC4 functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
iv

1.0 INTRODUCTION

The Liebert AC4 is ideal for coordinated control of systems with redundant equipment, such as multiple environmental units or pumps. When the Liebert AC4 controller detects an alarm in an operating device, the Liebert AC4 enables a standby device and controls the device in alarm as configured, either leaving that device operating or disabling it.
The Liebert 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 Liebert 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 Liebert AC4 is monitoring the status of connected devices and keeping personnel apprised through local alarming.
The Liebert 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 Liebert AC4 has a local LCD interface and an RS232 interface.
When an alarm condition arises, the Liebert 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.

1.1 Methods of Viewing and Configuring the Liebert AC4

Introduction
The Liebert 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 Liebert AC4, allowing users to view data, silence alarms and have full access to information stored in the controller, including logs of alarms and events.

1.2 Data Logs

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

1.3 Available Alarms

The alarms available with the Liebert AC4 are:
• Discrete input alarm (for each digital input)
• Loss of power
• No standby available
• Standby device failed
• No restart available
®
1Liebert
AC4

1.4 Outside Enclosure Overview

LCD for configuration and operation
Key lock
The enclosure has knockouts and access slots on top and bottom for cables and wires.
Back of LCD
Controller Board
Ground wire for LCD
Knockouts and access slots (top and bottom)
The Liebert AC4 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. The enclosure is made of metal to accommodate secure conduit fittings and protect components against environmental debris.

Figure 1 Liebert AC4 enclosure—external features

Introduction
The enclosure must be secured to a wall, either flush-mounted or recessed in the wall, as described in
2.0 Installation. Knockouts and access slots on the top and bottom allow easy connection of wires and cables (see 3.0 Wiring and Connections) with either mounting type.

Figure 2 Liebert AC4 enclosure—internal features

Liebert® AC4
2

1.5 Typical Configuration

DEVICES CONNECTED
TO INPUTS & OUTPUTS
RS232
Liebert
Challenger
3000
Liebert
Himod
Liebert
Challenger
3000
Liebert
Himod
Zone 1 Devices
Device 1 Device 2
Zone 2 Devices
Device 3 Device 4
Figure 3 shows an example of external devices connected to the Liebert AC4 controller board. There may be up to four devices connected to the four digital inputs and four digital outputs. Remote access is available through the Service Terminal Interface.

Figure 3 Typical Configuration

Introduction
3Liebert
®
AC4

1.6 Controller Board Overview

G - Digital output connectors
J - Digital input connectors
P - 24VAC power connector
E - Digital output status LEDs
I - Digital output loss-of-power jumper
F - Manual Override Switch (outputs)
H - Status LEDs
A - Power On/Off switch
N - LCD connector
K - Digital input status LEDs
O - LCD contrast adjustment
M - DIP switch 1
D - Common Alarm connectors
C - Audible horn jumper
B - Audible horn
L - Serial interface connector (RS232/EIA574)
The Liebert AC4 controller board has connectors for four digital inputs and four digital outputs, as shown below. The board comes complete with light emitting diodes (LEDs) to display the status of connected devices, a serial communications port, a power connection and other features necessary to control your operation.
Introduction

Table 1 Controller board components

A - Power On/Off switch
B - Audible horn Provides audible notification when an alarm occurs. N/A
C - Audible horn jumper
D - Common Alarm connectors
E - Digital output status LEDs
F - Manual Override Switch (outputs)
G - Digital output connectors
H - Status LEDs Indicates the operational status of the controller board. 1.7: LED Indicators
Liebert® AC4
Item Description For more information, see:
2.4: Connect Power to the Liebert AC4
N/A
3.0: Wiring and Connections
3.3: Connecting Common Alarm Outputs
7.4: Setup System - Setup Common Alarm
1.7: LED Indicators
7.9: Override Output
3.0: Wiring and Connections
3.2.2: Connecting Digital Outputs
5.5: View Output Status
7.6: Setup System - Setup Outputs
Power switch for the controller board.
Jumper to disable the audible horn (factory default is enabled).
The two common alarm connections are used to connect to a secondary warning device such as a horn, light or Building Management System (BMS). When an alarm is present, the contacts close and the external warning device is activated/notified. The common alarm contacts may be configured to be reset with the Silence button/command.
Each output has an LED to indicate its status: ON/OFF (energized/de-energized).
Placing the switch in the ON position will turn ON, or energize, all four outputs simultaneously. This switch removes all automatic output control from the Liebert AC4.
Each of the four output connections is a two-state point: ON/OFF (energized/de-energized).
An example of a field digital output is a Liebert Environmental unit’s remote shutdown input.
4
Table 1 Controller board components (continued)
Item Description For more information, see:
One of four output jumpers. Each digital output has a jumper to set the fail-safe position of the output point when
I - Digital output loss-of-power jumper
power fails. The OFF position makes the contact Normally Open (factory default). The ON position makes the contact Normally Closed.
Note: The jumper position has no effect on the contact when the Liebert AC4 has power.
Each of the four input connections is a two-state point:
J - Digital input connectors
ON/OFF (energized/de-energized). An example of a field digital input is a Liebert
Environmental unit’s common alarm relay output.
K - Digital input status LEDs
L - Serial interface connector (RS232/EIA574)
Each input has an LED to indicate its status: ON/OFF (energized/de-energized).
Connection for laptop or video terminal. Used for configuration and monitoring using the Service Terminal Interface. Requires a null modem cable for connectivity (P/N 201258P1).
M - DIP switch 1 DIP switch used for resetting password to default. 7.7.1: Change Password
N - LCD connector Connection for the LCD on the enclosure door. N/A
O - LCD contrast adjustment
P - 24VAC power connector
Adjustment contrast for the LCD on the enclosure door. N/A
Power connection for the controller. Requires 24VAC.
3.2.3: Setting the Digital Output Jumpers
7.6.4: Configure Output for Loss of Power (“Fail-Safe”)
3.0: Wiring and Connections
3.2.1: Connecting Digital Inputs
5.4: View Input Status
7.3: Setup System - Setup Inputs
1.7: LED Indicators
3.4: RS232 Connector
A.2: Connecting to the Service
Terminal Interface
2.4: Connect Power to the Liebert AC4
Introduction
®
5Liebert
AC4

1.7 LED Indicators

Output LEDs
Status LEDs
Input LEDs
The Liebert AC4 controller board has LED indicators that show the status of inputs, outputs and the common alarm

Table 2 LED indicators summary

LED Type LED Color Description
EIA422
LEDs
Output LEDs
Status LEDs
Input LEDs
422 TX Green Liebert AC4 is transmitting information over the EIA422 port
422 RX Green Liebert AC4 is receiving information over the EIA422 port
OUTPUT1 Green Not used
OUTPUT2 Green Not used
OUTPUT3 Green Not used
OUTPUT4 Green Not used
OUTPUT5 Green Indicates output 1 is ON or energized
OUTPUT6 Green Indicates output 2 is ON or energized
OUTPUT7 Green Indicates output 3 is ON or energized
OUTPUT8 Green Indicates output 4 is ON or energized
CTRLLOCK N/A Not used
SENLOCK N/A Not used
CMN ALR Green Indicates output is ON or energized
MOP Green
Indicates the microprocessor is operating properly (MOP)—must be on before Liebert AC4 will function
FPROG Green Indicates firmware is being upgraded—lights up during upgrade process
574 TX or 232 TX Green Liebert AC4 is transmitting information via the RS232 port
574 RX or 232 RX Green Liebert AC4 is receiving information via the RS232 port
485 RX Green Not used
485 TX Green Not used
INPUT1 Red Not used
INPUT2 Red Not used
INPUT3 Red Not used
INPUT4 Red Not used
INPUT5 Red Indicates input 1 is ON or energized
INPUT6 Red Indicates input 2 is ON or energized
INPUT7 Red Indicates input 3 is ON or energized
INPUT8 Red Indicates input 4 is ON or energized
OUTPUT1
DS56
OUTPUT2
DS54
OUTPUT3
DS63
OUTPUT4
DS61
OUTPUT5
DS60
OUTPUT6
DS62
OUTPUT7
DS55
OUTPUT8
DS57
CTRLLOCK
DS59
SENLOCK
DS58
CMN ALR
DS53
DS52
MOP F PROG
DS51
574 TX
DS48
574 RX
DS47
485 RX
DS78
485 TX
DS79
DS69
INPUT1 INPUT2
DS71
INPUT3
DS72
INPUT4
DS70
INPUT5
DS67
INPUT6
DS66
INPUT7
DS65
INPUT8
DS64
Introduction
Liebert® AC4
6

1.8 Typical Sequence

ALARMS CLEARED
30-SEP-04 16:24:04
Entry in Alarm Log
(
ALARMS CLEARED)
DEVICE_1 ALARM CONTACT CLOSED 30-SEP-04 16:23:04
Entry in Alarm Log
Condition (
ALARM)
& state (
CONTACT CLOSED)
The alarm is cleared
(automatically if Unlatched; must be cleared manually if Latched)
UNIVERSAL MONITOR 05-SEP-02 14:04:13
V5.100.0
PRESS =STATUS/SETUP
ESCESC
The LCD stops flashing
RETURN TO NORMAL
The device that triggered the alarm returns to its normal state.
The horn sounds (audible horn on the controller board—silence horn by pressing any key on the LCD keypad)
The LCD flashes
(except during setup)
ALARM CONDITION DETECTED
A device connected to the Liebert AC4 changes state.
RESPONSES TO AN ALARM RETURN-TO-NORMAL SEQUENCE
ESC
DEVICE_1 STARTED DEVICE_2 STARTED DEVICE_3 STARTED DEVICE_4 OFF 30-SEP-04 16:24:06
DEVICE_4 STARTED
30-SEP-04 16:23:10
DEVICE_1 ALARM CONTACT CLOSED
Entry in Event Log
Status change (
DEVICE_4 STARTED)
Entry in Event Log
Actions in response to event (DEVICE_1 STARTED,
DEVICE_4 OFF
)
Entry in Active Alarm Log
Condition (
ALARM)
& state (
CONTACT CLOSED)
The horn stops sounding
(if user hasn’t silenced it)
User setup determines output control (for example, the device
in alarm might be disabled and a standby device set to operate)
Figure 4 shows a typical sequence of how the Liebert AC4 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.

Figure 4 Example of typical sequence

Introduction
UNIVERSAL MONITOR 05-SEP-02 14:04:13
V5.100.0
PRESS =STATUS/SETUP
ESC
7Liebert
®
AC4

2.0 INSTALLATION

2.1 Installation Considerations

The Liebert AC4 must be installed indoors and may be mounted on the surface of a wall or flush­mounted, depending on the user’s application, the location of equipment to be connected and the type of wall the unit will be mounted on.
The Liebert AC4 should be mounted where it can be easily accessed. On-site personnel would access the unit through the LCD on its front cover or the service terminal connected to the RS232 port.
In addition to the communications connections, the site also must have electrical service and must permit connecting the unit’s four digital inputs and four digital outputs.
The wall material must be capable of supporting the weight of the Liebert AC4: see
8.0 Specifications.
NOTE
This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense.
Installation

2.1.1 Unpacking and Preliminary Inspection

• Before unpacking the Liebert AC4, inspect the shipping carton for damage or signs of mishandling, such as gashes or holes in the carton or severely flattened corners.
• Open the shipping crates carefully. Use care to avoid puncturing the container with sharp objects that might damage the contents.
• Inspect the Liebert AC4 and all included components for damage.
• If any damage from shipping or mishandling is observed, immediately file a damage claim with the shipping agency and forward a copy to:
Liebert Corporation 1050 Dearborn Drive P.O. Box 29186 Columbus, OH 43229
Packing Contents
Table 3 Packing manifest
Standard Components
Liebert AC4 controller board in enclosure
User Manual
Keys (2) to panel door lock
RS232 Configuration Cable
Liebert® AC4
8

2.2 Surface-Mounting the Liebert AC4

!
0.213"
(5.4mm)
Mounting Slot
0.375"
(9.6mm)
Liebert AC4
back plate
12.5"
(317.5mm)
0.213" (5.4mm)
Bottom hole diameter
10"
(254mm)
NOTE
Removing the conduit knockouts before mounting the Liebert AC4 on the wall will ease installation and prevent strain on the mounting hardware and wall. It is imperative to remove the knockouts if the unit is to be flush-mounted.
After determining where to place the unit, check to ensure that you have all the hardware required to install the panel on the surface of a wall. Obtain the needed tools and material.

Required tools

• Electric drill (if surface is too hard to drive screws without pilot holes)
• Screwdriver
• Marker to denote layout of holes
• Four screws, each #10

2.2.1 Mounting the Panel

WARNING
Risk of electric shock. Can cause property damage, injury and death.
Check building plans and other relevant documents to determine whether mounting the Liebert AC4 at the selected location might cause cutting or otherwise damaging electrical or communication wiring or pipes.
Installation
1. Mark the wall for mounting holes, using the back of the unit as a template (see Figure 5).
2. Drill holes, if required, to install the four #10 screws that will secure the Liebert AC4 to the wall. Clean up the debris.
3. If the wall material is not strong enough to hold the screws securely, use wall anchors.
4. Install the top two screws—the screw heads must be small enough to slip through the larger, bottom portion of the pear-shaped mounting slot in the Liebert AC4 (see inset in Figure 5). The screws must also be large enough to extend over the edges of the top of the mounting slot.
5. Hang the Liebert AC4 on the screws, letting the panel slip down until the screws are in the smaller, upper portion of the slot.
6. Tighten the screws until they are snug.
7. Insert the remaining two screws in the bottom holes on the back of the panel and tighten.
Figure 5 Mounting dimensions
9Liebert
®
AC4

2.3 Flush-Mounting the Liebert AC4

!
NOTE
Removing the conduit knockouts before mounting the Liebert AC4 on the wall will ease installation and prevent strain on the mounting hardware and wall. It is imperative to remove the knockouts if the unit is to be flush-mounted.
The rectangular access doors on the top and bottom of the Liebert AC4 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.
The Liebert AC4 may be flush mounted according to company practices—either with screws through the sides of the panel into wall supports or with hanging hardware that attaches to the back of the panel. After determining how and where to place the unit, check to ensure that you have all the hardware required to install the panel in the wall. Obtain the needed tools.

Required tools

•Saw
• Electric drill
• Screwdriver
• Marker to denote layout of the hole to accommodate the Liebert AC4
• Trim ring and associated hardware
• Mounting hardware
Installation

2.3.1 Mounting the Panel

WARNING
Risk of electric shock. Can cause property damage, injury and death.
Check building plans and other relevant documents to determine whether mounting the Liebert AC4 at the selected location might cause cutting or otherwise damaging electrical or communication wiring or pipes.
1. Mark the wall for the cutout to accommodate the panel, using the back of the unit as a template.
2. Drill a pilot hole for the saw blade, if required.
3. Use the saw to cut out the marked section of the wall (if not new construction).
4. Rest the Liebert AC4 in the wall and mark where mounting screws will be inserted into the wall studs or other support member.
5. Remove the panel and drill the holes for the mounting screws or wall anchors. Clean up the debris.
6. Reverse the slide direction of the rectangular access doors on the top and bottom of the Liebert AC4. Leaving the doors as shipped from the factory prevents them from being opened when the panel is flush mounted in a wall.
7. Attach any field-supplied mounting hardware.
8. Reinsert the assembly into the wall.
9. Insert and tighten the screws or wall anchors.
Liebert® AC4
10

2.4 Connect Power to the Liebert AC4

!
!
!
24VAC input connector
24VAC wiring (red & white)
Power On/Off switch
External wiring through knockout
Earth ground terminal
Ground wire (black)
The Liebert AC4 requires 24VAC for proper operation. Liebert recommends using the optional Transformer Module manufactured by Liebert or another UL-approved class 2 power unit to obtain proper voltage. If the power unit is not a class 2 circuit, it must be protected with an IEC 5 x 20mm time lag 2A fuse. For information, consult your local dealer, Emerson representative or the Emerson Network Power Liebert Worldwide Support Group.
WARNING
Risk of electric shock. Can cause property damage, injury and death. Check that power is removed from wires prior to installation. This unit should be installed
only by properly trained and qualified personnel.
CAUTION
Risk of electric shock. Can cause property damage, injury and death. The Liebert AC4 is designed for use on properly grounded (earthed) 24VAC power, 50Hz or
60Hz. The ground wire for the power lead must be wired to the earth ground terminal (stud located next to the 24VAC terminal block).
This equipment is intended to be installed by a qualified and certified electrician who must review and approve customer supplied wiring and circuit breakers, verify correct input and grounded (earthed) connections to ensure compliance with technical standards and national and local electrical codes.
Installation
WARNING
Risk of electric shock. Can cause property damage, injury and death.
Be sure that the Power On/Off switch is set to OFF before installing any wiring to this unit. The switch is in the top left corner of the unit, just below the battery pack.
To connect electrical power:
1. Run conduit and electrical wiring from building to the Liebert AC4.
2. Use copper wires only; proper wiring to use for power is 18-22 AWG stranded and shielded (18 AWG is recommended—see Table 4). Strip wires 1/2".

Figure 6 Electrical connections to panel

3. Secure the incoming electrical service wires to the Liebert AC4’s 24VAC input by sliding the wires into TB7, the 24VAC input terminal block. There is no polarity requirement when connecting to TB7. The ground wire must be connected to the earth ground terminal located on the side of the panel (see Figure 6).
11 Liebert® AC4
Wiring and Connections
!

3.0 WIRING AND CONNECTIONS

WARNING
Risk of electric shock. Can cause property damage, injury and death.
Switch Off electric power to the Liebert AC4 before installing any wiring to the unit or changing input or output connections. The Power On/Off switch is in the top left corner of the unit.

3.1 Wiring Specifications

Input and output connections to the Liebert AC4 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.

Table 4 Wiring specifications

Connection Supported Wire Type Maximum Wire Length Rating
Digital
Input
Digital
Output
Common
Alarm
Output
Communication
RS232
24VAC Power
Connection
(TB7)
* Recommended
18-22 AWG Stranded & Unshielded
18 AWG* (recommended)
Non Plenum - Belden 9740 Plenum - Belden 89740
18-22 AWG Stranded & Unshielded
18 AWG* (recommended)
Non Plenum - Belden 9740 Plenum - Belden 89740
18-22 AWG Stranded & Unshielded
18 AWG* (recommended)
Non Plenum - Belden 9740 Plenum - Belden 89740
Null Modem Cable 50 ft. (15m) N/A
18-22 AWG Stranded & Shielded
18 AWG* (recommended)
Non Plenum - Belden 8770 Plenum - Belden 88770
18 AWG*
(recommended)
@3A 50 ft. (15m) @2A 100 ft. (30m) @1A 200 ft. (60m)
18 AWG*
(recommended)
@3A 50 ft. (15m) @2A 100 ft. (30m) @1A 200 ft. (60m)
750 ft. (225m)
20 AWG 22 AWG
@3A 40 ft. (12m) @2A 60 ft. (18m) @1A 100 ft. (30m)
20 AWG 22 AWG
@3A 40 ft. (12m) @2A 60 ft. (18m) @1A 100 ft. (30m)
150 ft. (45m) 24VAC @1.3A
@3A 25 ft. (7m) @2A 35 ft. (10m) @1A 75 ft. (23m)
@3A 25 ft. (7m) @2A 35 ft. (10m) @1A 75 ft. (23m)
Dry Contact
(24VDC, 10 mA)
24VAC @3A
24VAC @3A
Liebert® AC4
12

3.2 Connecting Digital Inputs and Outputs

INPUT TERMINAL BLOCKS Note numbering keys to right of terminal blocks; inputs are numbered from bottom (1) to top (4)
OUTPUT TERMINAL BLOCKS Note numbering keys to right of terminal blocks; outputs are numbered from bottom (1) to top (4)
Numbering keys
The digital inputs and outputs are on the lower right side of the Liebert AC4 printed wiring assembly board. This section describes how to connect devices to the Liebert AC4’s inputs and outputs.
Each input is tied to an output with the same number:
• Input 1 is tied to Output 1 (default name: Device_1)
• Input 2 is tied to Output 2 (default name: Device_2)
• Input 3 is tied to Output 3 (default name: Device_3)
• Input 4 is tied to Output 4 (default name: Device_4)
Up to four devices may be connected to the Liebert AC4. Each device must be connected to an input and an output with the same number.
To determine the proper wire size, see Table 4 Wiring specifications.
NOTE
Each terminal block is a removable assembly to permit easier connection of more than one input or output at a time. If making multiple connections, grasp the upper portion of a block and pull firmly until the assembly pulls apart.
After making the connections, push the removed piece back into the portion attached to the printed wiring assembly until the terminal block pieces lock together.

Connecting Liebert Precision Cooling Units

Wiring and Connections
For Liebert Precision Cooling units, follow these steps (be sure to connect the same device to inputs and outputs with the same number (Input 1 and Output 1, Input 2 and Output 2, and so on):
• Connect a digital input from the Liebert AC4 to the Common Alarm Relay of the environmental unit: terminals 75/76 or TB1-6,TB1-7.
• Connect a digital output (numbered the same as the input) from the Liebert AC4 to the Remote Shutdown (Power Control) of the environmental unit: terminal 37/38 or TB1-4, TB1-5.

3.2.1 Connecting Digital Inputs

The four digital inputs are on the lower right side of the Liebert AC4, just below the output terminal blocks, as shown at right. These inputs are numbered 1 through 4.
To connect an input:
1. Turn Off electrical power to the Liebert AC4.
2. If necessary, remove a conduit knockout to permit wire entry into the Liebert AC4 enclosure.
3. Bring the wire(s) into the Liebert AC4 enclosure through a conduit knockout or access slot.
4. Loosen the appropriate screw and slip the stripped end of the wire into the terminal block.
5. Tighten the screw until it holds the wire snugly.
13 Liebert® AC4

3.2.2 Connecting Digital Outputs

!
Digital output jumpers (four)
The four digital outputs are found on the lower right side of the Liebert AC4 just above the input terminal blocks, as shown at right. These outputs are numbered 1 through 4.
To connect an output:
1. Turn OFF electrical power to the Liebert AC4.
2. If necessary, remove a conduit knockout to permit wire entry into the Liebert AC4 enclosure.
3. Bring the wire(s) into the Liebert AC4 enclosure through a conduit knockout or access slot.
4. Loosen the appropriate screw and slip the stripped end of the wire into the terminal block.
5. Tighten the screw until it holds the wire snugly.
CAUTION
To reduce the risk of fire or electric shock, do not interconnect the outputs of different class 2 circuits.

3.2.3 Setting the Digital Output Jumpers

Each digital output has an associated jumper to define its operation when power is interrupted. This puts the Liebert AC4 in a fail-safe mode and ensures proper functioning when the board has no power.
The Liebert AC4 comes from the factory with all digital output jumpers in the OFF position (normally open). The jumper setting for each digital output can be changed to ON (normally closed). The settings are shown in Table 5.
Table 5 Digital output jumper settings
Setting
OFF Normally open
ON Normally closed
Output status
(power loss)
Wiring and Connections
To change the output jumper setting:
1. Find the respective loss-of-power jumper on the circuit board, as shown above. See Table 1 Controller board components for more information.
2. Decide whether your configuration requires the jumper to be OFF or ON.
3. Set the jumper as needed:
• Set the jumper to OFF by placing the loss-of-power jumper on the middle and top pins.
• Set the jumper to ON by placing the black jumper on the middle and bottom pins.
Liebert® AC4
14

3.3 Connecting Common Alarm Outputs

Common alarm outputs
Serial interface connector (RS232/EIA5
74)
The common alarm relay, found in the top right corner of the Liebert AC4, permits the user to connect auxiliary notification equipment, such as lights, horns and sirens, to the Liebert AC4. To determine the proper wire size, see Table 4 Wiring specifications.
There are two connectors for the common alarm output. However, the connectors are not individual relay outputs. The connectors should be treated as a double-pole, double-throw (DPDT) relay.
The common alarm relay is energized whenever an alarm occurs.
To connect an output:
1. Turn OFF electrical power to the Liebert AC4.
2. If necessary, remove a conduit knockout to permit wire entry into the Liebert AC4 enclosure.
3. Bring the wire(s) into the Liebert AC4 enclosure through a conduit knockout or access slot.
4. Loosen the appropriate screw and slip the stripped end of the wire into the terminal block.
5. Tighten the screw until it holds the wire snugly.

3.4 RS232 Connector

The Liebert AC4’s Service Terminal Interface offers full configuration and monitoring capability via the RS232 port (see A.2 - Connecting to the Service Terminal Interface).
The RS232 port requires a null modem cable. Connect one end of the cable to the Liebert AC4’s RS232 port, shown at right, and the other end to the COM1 port of a laptop computer or video terminal.
Wiring and Connections
15 Liebert® AC4
Overview of Menus

4.0 OVERVIEW OF MENUS

There are two ways to access the Liebert AC4: 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.
• Step-by-step instructions for all functions appear in Sections 5.0 through 7.0. These instructions use examples of LCD screens to illustrate most functions, except those not available via the LCD.
• Examples of all Service Terminal Interface screens appear in Appendix A - Service Terminal
Interface, along with instructions on how to connect to the Service Terminal Interface.
Table 6 lists all Liebert AC4 functions and shows whether they can be performed through the LCD
interface and where to find information.

Table 6 Guide to Liebert AC4 functions

Can be performed via: Where to find:
Function
VIEW STATUS FUNCTIONS
View Active Alarms 44 page 19 page 57
View Alarm Log 44 page 20 page 58
View Event Log 44 page 21 page 59
View Input Status 44 page 22 page 59
View Output Status 44 page 23 page 60
SILENCE ALARM & BACK UP LOGS FUNCTIONS
Silence Alarm (On the LCD, press any key to silence an alarm)
Back Up Log Files 4 page 25 page 62
SYSTEM & CONTROL FUNCTIONS
Login 44 page 27 page 63
Setup System 44 page 29 page 64
Setup Inputs 44 page 29 page 65
Setup Common Alarm 44 page 32 page 66
Setup Zones 44 page 33 page 66
Setup Outputs 44 page 34 page 67
Setup System Info 44 page 36 page 68
Change Password 44 page 36 page 68
Set Date & Time/Automatic Daylight Saving Time 44 page 37 page 69
Setup Site ID 44 page 37 page 69
Backup and Upload Configuration File 4 page 38 page 70
Factory Defaults 44 page 41 page 71
Perform Firmware Update 4 page 41 page 72
Setup Operation 44 page 43 page 73
Override Output 44 page 47 page 76
Clear Alarms & Logs 44 page 48 page 77
Clear Active Alarms 44 page 48 page 77
Clear the Alarm Log 44 page 48 page 77
Clear the Event Log 44 page 48 page 78
LCD
44 page 24 page 61
Service
Terminal
Instructions on
using function
Service Terminal screen examples
Liebert® AC4
16

4.1 Opening Screen Overview

Opening Screen
LIEBERT AC4
DD-MON-YY HR:MM:SS
VX.XXX.X
PRESS
=STATUS/SETUP
(If any alarms detected)
Current Alarm screen (see 5.1 View Active Alarms)
Main Menu
VIEW STATUS SYSTEM AND CONTROL
↑↓=NEXT
=SELECT
“View Status” selected
See Section
“System & Control” selected
See Section
> VIEW STATUS
SYSTEM AND CONTROL
↑↓=NEXT
=SELECT
5.0
VIEW STATUS
> SYSTEM AND CONTROL
↑↓=NEXT
=SELECT
7.0
View Status Menu
(All users - no password)
See Section
System & Control Menu
(Password required)
See Section
VIEW ACTIVE ALARMS VIEW ALARM LOG VIEW EVENT LOG VIEW INPUT STATUS VIEW OUTPUT STATUS
5.1
5.2
5.3
5.4
5.5
SETUP SYSTEM OVERRIDE OUTPUT CLEAR ALARMS & LOGS
7.2
7.9
7.10
The Liebert AC4 displays the Opening Screen at startup, as shown in Figure 7.
• If any alarms are active, the Current Alarm screen appears. (Pressing any key on the LCD keypad will silence the audible alarm.)
If no alarms are present, the Main Menu appears.

4.2 Main Menu Overview

The Main Menu offers access to all functions within the panel. As shown in Table 7, the functions are organized into three sections with step-by-step instructions.

Table 7 Primary Functions Overview

Section Description
These features are available to all users. This permits all personnel to check the
5.0 - View Status Options (both LCD and Service Terminal Interface)
6.0 - Silence Alarm & Backup Log Files (Service
Terminal Interface only)
7.0 - System and Control Options (some functions
available via Service Terminal Interface only)
status of any monitored equipment or location. From this menu, any user may:
• View active alarms
• View the current status of digital inputs and outputs
• View data stored in the alarm and event logs These features—available via the Service Terminal Interface only—allow users to:
• Silence the audible alarm
• Back up the alarm and event logs These options require a password. Authorized users may:
• Configure the Liebert AC4
• Override automatic control of outputs to force an output ON or OFF
• Clear active alarms and delete all records in the alarm and event logs
Overview of Menus

4.3 LCD Menu Overview

Figure 7 shows an overview of the initial screens available through the LCD interface. For comparable information about the Service Terminal Interface screens, see A.3 - Overview of Menus.

Figure 7 LCD Menu overview

17 Liebert® AC4

5.0 VIEW STATUS OPTIONS

Opening Screen
LIEBERT AC4
DD-MON-YY HR:MM:SS
VX.XXX.X
PRESS =STATUS/SETUP
Main Menu
> VIEW STATUS
SYSTEM AND CONTROL
↑↓=NEXT ↵=SELECT
View Status
VIEW ACTIVE ALARMS VIEW ALARM LOG VIEW EVENT LOG VIEW INPUT STATUS VIEW OUTPUT STATUS
View Active Alarms View Alarm Log View Event Log
> ACTIVE ALARM 40/40
DEVICE_1 ALARM CONTACT CLOSED
See Section
5.1
> ALARM RECORD 99/99
DEVICE_1 ALARM CONTACT CLOSED 30-JUN-04 09:29:10
NO STANDBY AVAILABLE
29-JUN-04 10:45:00
STNDBY DEVICE FAILED
29-JUN-04 10:39:00
NO RESTART AVAILABLE
28-JUN-04 06:54:09
See Section
5.2
> EVENT RECORD 99/99
SYSTEM USER LOGIN 19-MAY-04 10:07:00
DEVICE_1 HW FORCE ON CONTACT CLOSED 18-MAY-04 06:47:03
DEVICE_4 FORCE OFF CONTACT OPEN 18-MAY-04 05:22:17
DEVICE_3 AUTO CONTACT OPEN 18-MAY-04 04:32:11
See Section
5.3
View Input Status View Output Status
INPUT / STATUS
> DEVICE_1 ALARM
DEVICE_2 NORMAL DEVICE_3 NORMAL DEVICE_4 NORMAL
See Section
5.4
OUTPUT / STATUS
> DEVICE_1 ALARM
DEVICE_2 OPERATING DEVICE_3 OPERATING DEVICE_4 OPERATING
See Section
5.5
View Status options
NOTE
For ease of understanding, this section uses the LCD interface to illustrate most instructions, except for features that are available only through the Service Terminal Interface. All Service Terminal Interface screens appear in Appendix A - Service Terminal Interface.
The View Status menu allows any user to view currently active alarms, data stored in the alarm and event logs and the status of all inputs and outputs. The arrows menu. The Enter key is used to select the menu item.
This section presents step-by-step instructions for each of the following options:
• View Active Alarms
•View Alarm Log
•View Event Log
• View Input Status
• View Output Status
Figure 8 shows the main options available from the View Status menu.

Figure 8 Menu overview - View Status menu

View Status Options
↑↓ are used to scroll through the
Liebert® AC4
18

5.1 View Active Alarms

Main Menu
> VIEW STATUS
SYSTEM AND CONTROL
↑↓=NEXT
=SELECT
View Status Menu
> VIEW ACTIVE ALARMS
VIEW ALARM LOG VIEW EVENT LOG VIEW INPUT STATUS
VIEW OUTPUT STATUS
Active Alarms
> ACTIVE ALARM 01/40
DEVICE_1 ALARM CONTACT CLOSED
The Active Alarm screen displays all alarms that are occurring, up to a maximum of 40.
A Current Alarm screen appears automatically whenever an alarm occurs—except during setup. This screen can display only the two most recent active alarms. To view any other active alarms, use the View Active Alarms feature.
You may view active alarms at any time by using the following steps:
View Status Options
• From the Main Menu, use the arrows
shown at right, and then press Enter ↵.
• From the View Status Menu, use the arrows
Active Alarms and press Enter ↵.

5.1.1 Active Alarms

The Active Alarms screen displays up to 40 records; it shows any active alarm and any Latched alarm that has not been cleared. Examples of alarms include inputs in alarm status and failure of a standby device. When any alarms are present, the Active Alarms screen shows descriptive details for each alarm:
• the source of the alarm (for example,
• the status of an input (
If there are no active alarms, the screen displays the message:
NO ALARMS PRESENT
Viewing Additional Screens
There may be up to 40 records of alarm data.
• To view additional records, use the arrows
• To return to the previous screen, press the ESC key.
Clearing Active Alarms
To clear all active alarms, see 7.10 Clear Alarms & Logs. Alarm records are stored in the Alarm Log.
↑↓ to choose View Status, as
↑↓ to choose View
DEVICE_1)
CONTACT CLOSED)
↑↓.
19 Liebert® AC4

5.2 View Alarm Log

Main Menu
> VIEW STATUS
SYSTEM AND CONTROL
↑↓=NEXT
=SELECT
View Status Menu
VIEW ACTIVE ALARMS
> VIEW ALARM LOG
VIEW EVENT LOG VIEW INPUT STATUS
VIEW OUTPUT STATUS
Alarm Log
> ALARM RECORD 99/99
DEVICE_1 ALARM CONTACT CLOSED 30-JUN-04 09:29:10
NO STANDBY AVAILABLE
29-JUN-04 10:45:00 STNDBY DEVICE FAILED
29-JUN-04 10:39:00 NO RESTART AVAILABLE
28-JUN-04 06:54:09
The Alarm Log contains up to 99 records of alarms that have occurred. Records are added to this log as alarms occur.
To view the Alarm Log:
View Status Options
• From the Main Menu, use the arrows
then press Enter ↵.
• From the View Status Menu, use the arrows
Alarm Log, then press Enter ↵.

5.2.1 Alarm Log

The Alarm Log screen displays up to 99 records showing alarm data, including inputs and outputs in alarm status and failure of a standby device. If the log contains any alarm records, the Alarm Log screen displays details for each alarm:
• the source of the alarm (for example,
• the status of an input or output ( description of the problem (
• the date and time the alarm occurred
Table 8 shows conditions that the alarm log records for digital inputs and in the panel itself.
Table 8 Alarm log conditions
SOURCE
CONDITIONS RECORDED
↑↓ to choose View Status,
DEVICE_1)
CONTACT CLOSED) or a brief
STNDBY DEVICE FAILED)
Digital Input Panel
LOSS OF POWER
ALARM NORMAL
ALARM SILENCED ALARMS CLEARED STNDBY DEVICE FAILED NO STANDBY AVAILABLE NO RESTART AVAILABLE
↑↓ to choose View
If there are no alarms in the log, the screen displays the message:
Viewing Additional Screens

5.2.2 Backing Up the Alarm Log (Service Terminal Interface only)

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.
The alarm log is stored as a file in the Liebert AC4; 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.
You may back up the alarm log file to a remote computer using the Service Terminal Interface, as described in 6.2 Back Up Log Files (Service Terminal Interface only).
To delete all records in the alarm log, see 7.10 Clear Alarms & Logs.
NO ALARMS
↑↓.
Liebert® AC4
20

5.3 View Event Log

Main Menu
> VIEW STATUS
SYSTEM AND CONTROL
↑↓=NEXT
=SELECT
View Status Menu
VIEW ACTIVE ALARMS VIEW ALARM LOG
> VIEW EVENT LOG
VIEW INPUT STATUS VIEW OUTPUT STATUS
Event Log
> EVENT RECORD 99/99
SYSTEM USER LOGIN 19-MAY-04 10:07:00
DEVICE_1 HW FORCE ON CONTACT CLOSED 18-MAY-04 06:47:03
DEVICE_4 FORCE OFF CONTACT OPEN 18-MAY-04 05:22:17
DEVICE_3 AUTO CONTACT OPEN 18-MAY-04 04:32:11
DATE AND TIME SET 18-MAY-04 03:11:43
DEVICE_4 FORCE ON CONTACT CLOSED 18-MAY-04 02:34:00
In addition to alarms, the Liebert AC4 tracks other changes in the Event Log to assist users with verifying operational and troubleshooting problems. Events reflect changes in the status of an input that is defined as an event or the change of state of an output (i.e., manually forced ON or OFF). Other events may be informational, such as a user login. The Event Log contains up to 99 records of events, which are added as they occur.
To view the Event Log:
View Status Options

5.3.1 Event Log

• From the Main Menu, use the arrows
↑↓ to choose View Status,
then press Enter ↵.
• From the View Status Menu, use the arrows
↑↓ to choose View
Event Log, then press Enter ↵.
The Event Log screen displays up to 99 recent events. If the log contains any event records, the Event Log screen displays details for each event:
• the event source (for example,
• the status of an input or output ( description of the event (
DEVICE_1)
CONTACT CLOSED) or a brief
USER LOGIN)
• the date and time the event occurred
Table 9 shows conditions that the event log records for inputs and outputs and in the panel itself.
Table 9 Event log conditions
SOURCE
CONDITIONS RECORDED
Digital Input Digital Output Panel
ALARMS CLEARED ALARM SILENCED NO STANDBY OUTPUTS
AVAILABLE
NO STANDBY TESTING
DEVICE AVAILABLE TIME & DATE SET USER LOGIN
EVENT NORMAL
STARTED ON OFF HW FORCE ON AUTO FORCE ON FORCE OFF RESTORED
If there are no records in the log, the screen displays the message:
Viewing Additional Screens
There may be up to 99 records of event data.
• To view additional records, use the arrows

5.3.2 Backing Up the Event Log (Service Terminal Interface only)

• To return to the previous screen, press the ESC key.
The event log is stored as a file in the Liebert AC4; 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.
You may back up the event log file to a remote computer using the Service Terminal Interface, as described in 6.2 Back Up Log Files (Service Terminal Interface only).
To delete all records in the event log, see 7.10 Clear Alarms & Logs.
NO EVENTS
↑↓.
21 Liebert® AC4
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