Chapter 1
1-35
Overview
UPS Modes
Sleep Mode
To protect its internal circuitry and to prevent deep battery discharge after prolonged
disruptions in AC input power, the UPS includes a feature called
Sleep Mode.
In Sleep Mode
the UPS uses a minimum of battery power. Sleep Mode is normally initiated by the
operating system (HP-UX) sending a shutdown ("S") command to the UPS to conserve
Battery power. (This is the case when AC input fails, or its magnitude, frequency or
waveshape are out-of-spec, for a prolonged period of time).
The following conditions also cause the UPS to go into Sleep Mode:
• Deeply discharged batteries while running On-Battery during an abnormal AC input
situation (more likely to happen for operating systems other than HP-UX).
• Overload shutdown.
• Overtemperature shutdown.
• Improperly installed UPS (Battery Box cable not properly connected or Battery
Precharge Shorting Plate not properly installed).
• Certain internal UPS faults.
In addition, the UPS also goes into Sleep Mode after it has been in Automatic or Service
Bypass for more than 30 minutes (both of these cases are called
Bypass Sleep Mode
, to
distinguish them from all the other cases). In either Automatic or Service Bypass Sleep
Mode, power to the load is still maintained, in the absence of any power fail or out-of-spec
power events, even though most of the internal UPS circuits are dormant and do not
consume any battery power.
Bypass Sleep Mode can be distinguished from normal Sleep Mode by the state of the LED
Indicators and Sound Alarm. (See “Case 15 (Normal or Abnormal) — UPS Off or Asleep” in
Chapter 6 and “Case 16 (Normal or Abnormal) — Bypass Sleep Mode” in Chapter 6 for
more detailed information regarding both types of Sleep Mode, including recommended
diagnostic and recovery procedures).
Summary of Contents for PowerTrust A3589A
Page 7: ...Contents Contents 5 ...
Page 8: ...Contents 6 Contents ...
Page 10: ...Contents 8 Figures ...
Page 12: ...Contents 10 Tables ...
Page 14: ...2 ...
Page 20: ...Preface 8 ...
Page 22: ...Preface 10 ...
Page 52: ...1 30 Chapter1 Overview Specifications Figure 1 8 UPS Input Voltage Transfer Points ...
Page 56: ...1 34 Chapter1 Overview UPS Modes Figure 1 10 Simplified UPS 5 5 kVA UPS Block Diagram ...
Page 62: ...1 40 Chapter1 Overview Support Information ...
Page 76: ...2 14 Chapter2 Unpacking and Inspecting Shipping and Storage Requirements ...
Page 104: ...3 28 Chapter3 Installing the UPS Examples of PowerTrust Connections in a System ...
Page 116: ...5 4 Chapter5 Verification Procedures Load Testing ...
Page 148: ...7 6 Chapter7 Cleaning and Maintenance Exchanging Batteries Fan ...
Page 190: ...A 42 AppendixA HP UX UPS Monitor Error Messages Log Only Messages ...
Page 218: ...C 8 AppendixC Configuring the OS for the PowerTrust UPS Power Failing the UPS ...