Emerson Liebert APS User manual

AC Power
For Business-Critical Continuity™
Liebert®APS™
User Manual – 5-20kVA Modular UPS

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TABLE OF CONTENTS
IMPORTANT SAFETY INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
SAVE THESE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
GLOSSARY OF SYMBOLS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
1.0 PRODUCT INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
1.1 System Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.2 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.3 Operating Principle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.4 Operating Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
1.5 Major Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
1.5.1 UPS Frame . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
1.5.2 User Interface Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
1.5.3 System Control Module and System Monitor Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
1.5.4 Power Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
1.5.5 Battery Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
1.5.6 Charger Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
1.5.7 External Battery Cabinet (EBC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
2.0 INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
2.1 Unpacking Inspection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2.1.1 Installation Environment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2.1.2 Installation Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2.1.3 Installation Site . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2.2 Unloading the UPS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
2.3 Mechanical Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
2.3.1 Tower Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
2.3.2 Rack Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
2.4 Module Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
2.4.1 Installing Power Module, Battery Module and Charger Module. . . . . . . . . . . . . . . . . . . . . . . 22
2.4.2 Install System Control and System Monitor Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
2.5 Cable Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
2.5.1 Transformer-Free UPS Cable Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
2.5.2 Transformer-Based UPS Cable Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
2.5.3 Transformer-Free UPS—Dual Inverter Frames. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
2.5.4 Connecting External Battery Cabinet. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
2.5.5 Connecting Integrated Power Output Distribution (POD) . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
2.5.6 Commissioning/Startup Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
3.0 COMMUNICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38
3.1 Liebert IntelliSlot Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
3.2 Dry Contact Ports. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
3.3 REPO (Remote Emergency Power Off) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

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3.4 Long Run Time (LRT) Battery Temperature Probe Terminals . . . . . . . . . . . . . . . . . . . . . . . 41
3.5 USB Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
3.6 Liebert MultiLink®. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
3.7 LCD Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
4.0 OPERATION AND DISPLAY PANEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43
4.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
4.2 LCD Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
4.2.1 Startup Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
4.2.2 Main Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
4.2.3 Default Screen/Screen Saver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
4.3 LCD Screen Views . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
4.3.1 AC Mains Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
4.3.2 Battery Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
4.3.3 Output Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
4.3.4 Load Screen. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
4.3.5 UPS Information Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
4.3.6 Redundancy Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
4.3.7 Settings Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
4.4 Entering a Password . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
4.5 Setting or Changing a Parameter Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
4.5.1 Battery Setting Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
4.5.2 Language Selection Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
4.5.3 Alarms Screen. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
4.5.4 Records Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
4.5.5 Module Replacement Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
4.5.6 Prompt Window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
5.0 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60
5.1 Active Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
5.2 Module Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
5.3 Module Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
5.3.1 Removing Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
5.3.2 Replacing the User Interface Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
6.0 MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .67
6.1 Proper Care. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
6.2 Scheduled Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
6.3 Cleaning Fan Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
6.3.1 Top Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
6.3.2 Bezel Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
6.3.3 Bottom Fan Filter—Transformer-Based Frames Only . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
7.0 SPECIFICATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .69
7.1 Estimated Battery Run Times. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
7.1.1 Tables for UPS Where Model Number Digits 1-3 are AS1 or ASA . . . . . . . . . . . . . . . . . . . . . 72

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7.2 Estimated Battery Run Times. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
7.2.1 Tables for UPS Model Number Where Digits 1-3 are AS2 or ASB . . . . . . . . . . . . . . . . . . . . . 77
7.3 Estimated Battery Run Times. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
7.3.1 Tables for UPS model number digits 1-3 are AS3 or ASC . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
7.4 Estimated Battery Run Times. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
7.4.1 Tables for UPS Model Number Where Digits 1-3 are AS4 or ASD . . . . . . . . . . . . . . . . . . . . . 85
7.5 Estimated Battery Run Times. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
7.5.1 Tables for UPS Model Number Where Digits 1-3 are AS5 or ASE . . . . . . . . . . . . . . . . . . . . . 89
FIGURES
Figure 1 16-bay transformer-free UPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Figure 2 10-bay transformer-free UPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Figure 3 12-bay transformer-based UPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Figure 4 16-bay transformer-based UPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Figure 5 Operating principle diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Figure 6 UPS frames, bezels removed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Figure 7 User interface module. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Figure 8 Liebert APS system control module and the system monitor module . . . . . . . . . . . . . . . . . . . . . . 12
Figure 9 Liebert APS power module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Figure 10 Battery module appearance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Figure 11 Appearance of the charger module. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Figure 12 External battery cabinet. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Figure 13 Front and rear installation clearances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Figure 14 Remove the mounting brackets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Figure 15 Connect the ramp and remove UPS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Figure 16 Adjust the leveling feet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Figure 17 Installation position and drilling hole dimensions for stationary mounting. . . . . . . . . . . . . . . . . 17
Figure 18 Install cage nuts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Figure 19 Install the tray . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Figure 20 Install the guide rails. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Figure 21 Install the brackets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Figure 22 Push the UPS frame into the rack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Figure 23 Fix the UPS frame . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Figure 24 Install the metal plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Figure 25 Installation completed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Figure 26 Insert the power module, battery module and charger module . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Figure 27 Lever and fastener . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Figure 28 Remove large plastic bezel and user interface module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Figure 29 Insert the System Control and System Monitor module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Figure 30 Lever and fastener on System Control and System Monitor Module . . . . . . . . . . . . . . . . . . . . . . 24
Figure 31 Knockouts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Figure 32 Connection in single-phase input. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Figure 33 Connection in 3-phase input. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Figure 34 Setting bypass voltage jumper (default: 208VAC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Figure 35 Setting bypass voltage jumper (200/220/230/240VAC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Figure 36 Configuring the neutral/earth jumper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Figure 37 Knockouts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Figure 38 Connection method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Figure 39 Knockouts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

iv
Figure 40 Secure cables on cable bridges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Figure 41 Wiring connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Figure 42 Connecting external battery cabinet to a transformer-free UPS . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Figure 43 Connecting external battery cabinet (transformer-based UPS). . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Figure 44 Battery screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Figure 45 Liebert IntelliSlot communication port location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Figure 46 Pin layout of the dry contacts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Figure 47 REPO connector pin layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Figure 48 REPO switch connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Figure 49 Pin layout of the temperature sensor terminal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Figure 50 LCD port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Figure 51 Operation and display panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Figure 52 User interface module layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Figure 53 Startup screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Figure 54 Main screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Figure 55 Default screen/screen saver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Figure 56 Mains screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Figure 57 Battery screens . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Figure 58 Output screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Figure 59 Load screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Figure 60 UPS info screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Figure 61 Redundancy screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Figure 62 Settings screens. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Figure 63 Settings screens, (continued) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Figure 64 Battery settings screens . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Figure 65 Language selection screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Figure 66 Alarms screen. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Figure 67 Records screen. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Figure 68 Module replacement screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Figure 69 Example of prompt window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Figure 70 Module LED location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Figure 71 Lever and fastener . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Figure 72 Pull out a battery module, a power module or a charge module . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Figure 73 Replacing the user interface module. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
Figure 74 Replace/clean the top filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Figure 75 Replace/clean the bezel filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Figure 76 Replace/clean the bottom fan filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
TABLES
Table 1 Frame designation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Table 2 Cable connection method reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Table 3 Input cable selection list—60Hz. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Table 4 Input cable selection list—50Hz. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Table 5 Input cable selection for Transformer-based frames (60 Hz) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Table 6 Input cable selection for Transformer-based frames (50 Hz) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Table 7 Configuration list for output cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Table 8 Maximum load capacity of the output winding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Table 9 Input cable selection for Transformer-free Dual Inverter frames(50/60 Hz). . . . . . . . . . . . . . . . . 32
Table 10 Input cable selection for Transformer-free Dual Inverter frames(50/60 Hz). . . . . . . . . . . . . . . . . 32
Table 11 EBC DIP switch settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

v
Table 12 Pin definition of dry contact port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Table 13 Pin definition of the REPO dry contact . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Table 14 Pin definition of the temperature sensor terminal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Table 15 LED descriptions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Table 16 Audible alarm descriptions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Table 17 Control buttons functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Table 18 Function descriptions of menu button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Table 19 Item description of system information window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Table 20 Item description of menu window and data window. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Table 21 Function descriptions of menu buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Table 22 Information and actions required for the prompt window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Table 23 Alarm message list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Table 24 Descriptions of module LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Table 25 Liebert APS specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Table 26 Rated input voltage range (Unit: VAC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Table 27 Specifications of Liebert APS external battery cabinet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Table 28 10-bay, single-phase, no transformer unit Type N (& UPS model number digit 6 = N). . . . . . . . 72
Table 29 10-bay, single-phase, no transformer unit Type N (& UPS model number digit 6 = N). . . . . . . . 73
Table 30 10-bay, single-phase, no transformer unit Type R (& UPS model number digit 6 = R) . . . . . . . . 74
Table 31 10-bay, single-phase, no transformer unit Type B (& UPS model number digit 6 = B) . . . . . . . . 75
Table 32 10-bay, single-phase, no transformer unit Type F (& UPS model number digit 6 = F) . . . . . . . . 76
Table 33 16-bay, single-phase, no transformer unit Type N (& UPS model number digit 6 = N). . . . . . . . 77
Table 34 16-bay, single-phase, no transformer unit Type R (& UPS model number digit 6 = R) . . . . . . . . 78
Table 35 16-bay, single-phase, no transformer unit Type B (& UPS model number digit 6 = B) . . . . . . . . 79
Table 36 16-bay, single-phase, no transformer unit Type F (& UPS model number digit 6 = F) . . . . . . . . 80
Table 37 12-bay, single-phase, transformer-based unit Type N (& UPS model number 6 = N) . . . . . . . . . 81
Table 38 12-bay, single-phase, transformer-based unit Type R (& UPS model number 6 = R). . . . . . . . . . 82
Table 39 12-bay, single-phase, transformer-based unit Type B (& UPS model number 6 = B). . . . . . . . . . 83
Table 40 12-bay, single-phase, transformer-based unit Type F (& UPS model number 6 = F) . . . . . . . . . . 84
Table 41 16-bay, single-phase, transformer-based unit Type N (& UPS model number 6 = N) . . . . . . . . . 85
Table 42 16-bay, single-phase, transformer-based unit Type R (& UPS model number 6 = R). . . . . . . . . . 86
Table 43 16-bay, single-phase, transformer-based unit Type B (& UPS model number 6 = B). . . . . . . . . . 87
Table 44 16-bay, single-phase, transformer-based unit Type F (& UPS model number 6 = F) . . . . . . . . . . 88
Table 45 10-bay, two-phase, no transformer unit Type N (& UPS model number 6 = N) . . . . . . . . . . . . . . 89
Table 46 10-bay, two-phase, no transformer unit Type R (& UPS model number 6 = R) . . . . . . . . . . . . . . 90
Table 47 10-bay, two-phase, no transformer unit Type B (& UPS model number 6 = B) . . . . . . . . . . . . . . 91
Table 48 10-bay, two-phase, no transformer unit Type F (& UPS model number 6 = F). . . . . . . . . . . . . . . 92

vi

Important Safety Instructions
1Liebert
®APS™
IMPORTANT SAFETY INSTRUCTIONS
SAVE THESE INSTRUCTIONS
This manual contains important safety instructions. Read all safety, installation and operating
instructions before operating the Liebert® APS™ modular UPS system. Adhere to all warnings on the
unit and in this manual. Follow all operating and user instructions. Individuals must fully
understand this equipment to install and operate it.
This product is designed for commercial/industrial use only. It is not intended for use with life
support or other designated critical devices. Maximum load must not exceed that shown on the rating
label. Install and operate the unit only in an indoor clean environment, free from conductive
contaminants, moisture, flammable liquids, gases and corrosive substances. This Liebert APS
contains no user serviceable parts other than the user replaceable modules. Refer all faults to your
local dealer, local Emerson Network Power representative or the Emerson Network Power Liebert
Service Group.
The Liebert APS UPS system is designed for use on a properly earthed (grounded) "TN" electrical
supply, for installation by qualified personnel. A qualified electrician must review and approve
customer supplied wiring, circuit breakers, and intended loads and verify correct input, output, and
earth connections to ensure compliance with the technical standards and local electrical codes of
practice. Installation instructions and warning notices are found in this manual.
!
WARNING
Risk of electric shock. Can cause equipment damage, injury and death.
The battery can present a risk of electrical shock and high short circuit current. The following
precautions should be observed before replacing the battery pack:
• Wear rubber gloves and boots
• Remove rings, watches and other metal objects.
• Use tools with insulated handles.
• Do not lay tools or other metal objects on the batteries.
• If the battery kit is damaged in any way or shows signs of leakage, contact your local Emer-
son representative immediately.
• Do not dispose of batteries in a fire. The batteries may explode.
• Handle, transport and recycle batteries in accordance with local regulations.
!
WARNING
Risk of electric shock and fire. Can cause equipment damage, injury and death.
Although the Liebert APS UPS has been designed and manufactured to ensure personal
safety, improper use can result in electrical shock or fire. To ensure safety, observe the
following precautions:
• Clean the UPS with a dry cloth. Do not use liquid or aerosol cleaners.
• Never block or insert any objects into the ventilation holes or other openings of the UPS.
• Do not place the Liebert APS where it might be damaged.
!
WARNING
Risk of electric shock. Can cause equipment damage, injury and death.
This UPS contains no user-serviceable parts except for the user-replaceable module
assemblies. The UPS On/Off push button does not electrically isolate internal parts.
All service and maintenance operations must be performed by properly trained and qualified
personnel. Under no circumstances should unqualified or unauthorized personnel attempt to
gain access to the internal portions of the Liebert APS.

Important Safety Instructions
Liebert®APS™2
ELECTROMAGNETIC COMPATIBILITY—The Liebert APS complies with the limits of Category
C2, pursuant to IEC/EN/AS 62040-2, and for a Class A digital device, pursuant to Part 15 of FCC
rules. Operation is subject to the following conditions:
• The output cables shall be no longer than 10m (32ft).
• This device may not cause harmful interference.
• This device must accept any interference received, including interference that may cause
undesired operation. Operating this device in a residential area is likely to cause harmful
interference that users must correct at their own expense.
The Liebert APS complies with the requirements of EMC Directive 2004/108/EC and the published
technical standards. Continued compliance requires installation in accordance with these
instructions and use of accessories approved by Emerson.
Operate the UPS in an indoor environment only in an ambient temperature range of 0-40°C
(32-104°F). Install it in a clean environment, free from moisture, flammable liquids, gases and
corrosive substances.
Do not continue to use the UPS if the front panel indications are not in accordance with these
operating instructions or the UPS performance alters in use. Refer all faults to your local service
dealer.
Servicing of batteries should be performed or supervised by personnel knowledgeable of batteries and
the required precautions. Keep unauthorized personnel away from the batteries. Proper disposal of
batteries is required. Refer to your local laws and regulations for disposal requirements.
Never block or insert any object into the ventilation holes or other openings.
DO NOT CONNECT equipment that could overload the UPS or demand DC current from the UPS,
for example: electric drills, vacuum cleaners, laser printers, hair dryers or any appliance using half
wave rectification.
Storing magnetic media on top of the UPS may result in data loss or corruption. Turn Off and isolate
the UPS before cleaning it. Use only a soft dry cloth; never use liquid or aerosol cleaners.
Information for the Protection of the Environment
UPS SERVICING—This UPS makes use of components dangerous for the environment (electronic
cards, electronic components). The components removed must be taken to specialized collection and
disposal centers.
NOTICE TO EUROPEAN UNION CUSTOMERS: DISPOSAL OF OLD
APPLIANCES—This product has been supplied from an environmentally aware
manufacturer that complies with the Waste Electrical and Electronic Equipment
(WEEE) Directive 2002/96/CE.
The crossed-out trash bin symbol at right is placed on this product to encourage
users to recycle components and units whenever possible. Please be
environmentally responsible and recycle this product through your recycling
facility at its end of life. Do not dispose of this product as unsorted municipal
waste. Follow local municipal waste ordinances for proper disposal provisions to
reduce the environmental impact of waste electrical and electronic equipment (WEEE).
For information regarding the scrapping/disposal of this equipment, please browse
www.eu.emersonnetworkpower.com (Products section or Contact us section) or call Emerson’s
worldwide technical support.
• Toll Free Outside of North America: 00 80011554499
• Toll Number Based in Italy: [phone]
• Toll Free in North America: 1-800-LIEBERT (1-800-543 2378)

Glossary of Symbols
3Liebert
®APS™
GLOSSARY OF SYMBOLS
Risk of electrical shock
Indicates caution followed by important instructions
AC input
AC output
Requests the user to consult the manual
Indicates the unit contains a valve-regulated lead acid battery
Recycle
DC voltage
Equipment grounding conductor
Bonded to ground
AC voltage
!
i
PbH2SO4
-
+
R

Product Introduction
Liebert®APS™4
1.0 PRODUCT INTRODUCTION
Congratulations on your purchase of the Liebert APS Uninterruptible Power System (UPS). As with
every other Liebert product, we stand behind our quality. If you have any questions concerning this
UPS, please feel free to contact your local dealer or Liebert representative or call the appropriate
Technical Support number listed on the back of this manual.
To ensure proper installation and operation of this unit, please read this manual thoroughly.
The installation must be completed by trained professionals and follow all local codes. General
operation of the units can be conducted without any specialized training.
This chapter provides the system description, features, operating principle, operating mode, main
components and specifications of the Liebert APS UPS.
1.1 System Description
The Liebert APS power system is a modular UPS designed to provide high reliability. It is intended
for use with workstations, servers, networks, telecoms and other sensitive electronic equipment. It
provides continuous, high-quality AC power to your equipment, protecting it from any power
disturbance due to blackouts, brownouts, surges or noise interference.
The Liebert APS UPS is an easily adaptable UPS system. By simply installing additional power or
battery modules, you can expand your current system capacity, extend your backup runtime, or
provide redundancy. The Liebert APS UPS user interface enables the user to configure the operation
according to application requirements. It also informs the user on the status of the UPS and keeps a
log of events.
The Liebert APS series UPS contains both transformer-free and transformer-based UPS frames. The
use of the transformer-free or transformer-based frames is dependent upon the specific application
requirements. The appearance of the different frames is shown in Figures 1 through 4.
Table 1 Frame designation
UPS Model Number Digits 1-3 Frame Type Frame Rating
APS1 or APSA or APS5 or APSE 10 Bay Transformer-free 15 kVA redundant
APS2 or APSB or APS6 or APSF 16 Bay Transformer-free 20 kVA redundant
APS3 or APSC 12 Bay Transformer-based 15 kVA redundant
APS4 or APSD 16 Bay Transformer-based 20 kVA redundant

Product Introduction
5Liebert
®APS™
Figure 1 16-bay transformer-free UPS
Figure 2 10-bay transformer-free UPS
Manual Bypass
Breaker (under
cover)
User
Interface
Module
Bays for
Power,
Charger or
Battery
Modules
Bays for
Battery
Modules
System Control
Module (under
cover)
Dry Contacts
and REPO
Connections
POD Ports
FRONT VIEW
(Bezels Removed) REAR VIEW
Liebert IntelliSlot®
Ports
Power Input and
Output
Terminals
Output
Breaker
USB Port
External Battery
Cabinet
Connector
System
Enable
Switch
Manual Bypass
Breaker (under cover)
User Interface
Module
Bays for Power,
Charger, or
Battery Modules
Bays for Battery
Modules
System
Control
Module
(under
cover)
Dry Contacts
and REPO
Connections
POD
Port
Liebert
IntelliSlot
Ports
Power Input
and Output
Terminals
Output
Breaker
External
Battery
Cabinet
Connector
System
Enable
Switch
Input Breaker
(under cover)
FRONT VIEW
(Bezels Removed) REAR VIEW
USB Port

Product Introduction
Liebert®APS™6
Figure 3 12-bay transformer-based UPS
User Interface
Module
Bays for Power,
Charger, or
Battery Modules
Bays for
Battery
Modules
System Control
Module
(under cover)
Dry Contacts
and REPO
Connections
Ports for
PODs
FRONT VIEW
(Bezels Removed)
REAR VIEW
Liebert
IntelliSlot
Ports
Input Breaker
USB Port
ExternalBattery
Cabinet
Connectors
System Enable
Switch
Fans Output
Breaker
Power Input
and Output
Terminals
Manual Bypass
Breaker

Product Introduction
7Liebert
®APS™
Figure 4 16-bay transformer-based UPS
ManualBypass
Breaker
(under cover)
User Interface
Module
Bays for Power,
Charger or
Battery Modules
Battery
Module
Bays
System Control
Module
(under cover)
FRONT VIEW
(Bezels Removed)
Fans
Dry Contacts
and REPO
Connections
POD
Ports
REAR VIEW
Liebert
IntelliSlot®
Ports
Input
Breaker
USB Port
External
Battery
Cabinet
Connector
Output
Breaker
Power Input
and Output
Terminals
System
Enable
Switch

Product Introduction
Liebert®APS™8
1.2 Features
Liebert APS UPS
• Flexible extension of capacity, up to 15 or 20kVA modular power, depending upon frame rating
• N + 1 redundancy, improving availability
• Module design, modules hot-swappable by user
• Redundant intelligent module, providing redundant communication path
• Intelligent battery management
• External large batteries can be connected
• Internal automatic and manual bypass
• Transformer-based UPS frames provide output isolation transformer
• Optional 10A battery charger module
• Continuous system monitoring
• User-friendly interface with audible alarms and event logs
• Supporting hot-pluggable and online update
• Compatible with backup generators
Standard Components
•UPSframe
• User interface module: for comprehensive user indications and programmable controls
• System control modules and system monitor module: for system monitoring and communications
• Power modules: for power conditioning
• Battery modules: for backup power
• Charger module: option for charging batteries and long run time applications
• External battery cabinet: prolongs system run time
Communications
• Dry contacts
• Liebert IntelliSlot communication ports
•USBport
1.3 Operating Principle
The operating principle of the Liebert APS UPS is shown in Figure 5.

Product Introduction
9Liebert
®APS™
Figure 5 Operating principle diagram
The Liebert APS UPS is composed of AC input, EMI filter, power module(s), battery module(s), user
interface, control interface, system control module, output and bypass contactor, manual bypass,
output transformer (certain frames only) and AC output.
Input
EMI
Filter Power Module(s) EMI Filter
Output
Manual Bypass
Battery
Module(s)
User
Interface Control
Interface
System Control
Module
System Monitor
Module
Communication
Power
Control
Output and
Bypass
Contactor Output
Transformer
Wiring
Transformer models
have an output isolating
transformer

Product Introduction
Liebert®APS™10
1.4 Operating Modes
The Liebert APS UPS is a true online double-conversion system, having the following operating
modes:
•NormalMode
• Backup Mode
•AutoRestartMode
• Bypass Mode
Normal Mode
The power module rectifiers derive power from a utility AC source and supply regulated DC power to
the inverter. The module’s inverter regenerates precise AC power to supply the connected equipment.
The battery charger is in the power module and maintains a float-charge on the batteries of the UPS;
additionally, the optional charger module can also charge the batteries to maintain a quicker
recharge time for long backup time applications.
Backup Mode
When AC utility fails, the connected equipment is supplied power by the inverter, which obtains
energy from the battery modules. The output power will not be interrupted during the failure or
restoration of the AC utility/mains source.
Auto Restart Mode
After a power outage and complete battery discharge, and once AC utility is restored, the UPS will
automatically restart and resume supplying power to connected equipment. This feature is enabled at
the factory, but can be disabled by the user. The user can also program two auto restart delay settings
from the LCD:
• Battery capacity level (%)
• Countdown timer
Bypass Mode
The bypass provides an alternate path for power to the connected equipment and operates in the
following manner:
• Automatic: In the event of an internal fault or should the inverter overload capacity be exceeded,
the UPS performs an automatic transfer of the connected equipment from the inverter to the
bypass source.
• Manual: Should the UPS need to be taken out of service for limited maintenance or repair,
manual activation of the bypass will cause an immediate transfer of the equipment from the
inverter to the bypass source.

Product Introduction
11 Liebert®APS™
1.5 Major Components
This section provides a general description of each component and its functions. Please review this
section carefully, as it will give you a better understanding of how the UPS operates.
1.5.1 UPS Frame
The UPS frames are shown in Figure 6.
Figure 6 UPS frames, bezels removed
All UPS components are located in the Liebert APS frame. The front of the UPS consists of a series of
plastic bezels. By grasping these bezels from the sides and pulling straight out, you can remove the
bezel to reveal the battery/power module bays. The standard-model frame provides cooling fans and a
manual bypass breaker on its top; the transformer-model frame provides a manual bypass breaker on
its bottom and fans on both top and bottom. The user interface module is located above the
power/battery module bays for easy access, operation and for viewing UPS operating information. On
the lower right part of the user interface module, you will see the system control module bays.
NOTE
In Figure 6, the power module and battery module are extended for illustration purposes only.
Extending more than one module at a time could cause the unit to tip over.
16-Bay Transformer-Free UPS
16-Bay Transformer-Based UPS
10-Bay Transformer-Free UPS
12-Bay Transformer-Based UPS
Fan
(behind
display
bracket)
Manual Bypass
Breaker
Fan
(behind
display
bracket)
Manual Bypass
Breaker Fans
Fan
(behind
display
bracket)
Manual
Bypass
Breaker
Manual
Bypass
Breaker
Fan
(behind
display
bracket)
Fans

Product Introduction
Liebert®APS™12
1.5.2 User Interface Module
The user interface module is shown in Figure 7.
Figure 7 User interface module
The user interface module is the primary source of communication between the UPS and the user.
The user interface module permits:
• Viewing the UPS status
• Configuring the system
• Reviewing the event log
• Silencing the audible alarm
Refer to 4.0 - Operation and Display Panel for details on operating the user interface module.
1.5.3 System Control Module and System Monitor Module
The system control module and the system monitor module are the communication backbone of the
UPS. They gather input from all modules and process the data to control the operation of the system,
including monitoring the condition of each module. Except for the silkscreen, the appearance of the
system control module and the system monitor module is as shown in Figure 8.
Figure 8 Liebert APS system control module and the system monitor module
Under normal operation, the green status LED will blink and the yellow fault LED will be Off. For
any other condition, refer to 5.0 - Troubleshooting.
Handle
Green Status LED
Yellow Fault LED
Securing Hole
Locking Lever