Dell 3750W Users Manual Online Rack UPS (3750W And 4200W) User's Guide

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Dellt Online Rack UPS

3750W and 4200W

User's Guide

K804N, H952N, J730N, K805N

J739N

w w w . d e l l . c o m | s u p p o r t . d e l l . c o m

Notes and Warnings

NOTE: A NOTE indicates important information that helps you make better use of your software.

DANGER: A DANGER indicates an imminently hazardous situation which, if not avoided, will result in death or

serious injury.

WARNING: A WARNING indicates a potentially hazardous situation which, if not avoided, could result in death or

injury.

CAUTION: A CAUTION indicates a potentially hazardous situation which, if not avoided, may result in minor or

moderate injury or in property damage incidents.

DANGER: Observe the following instruction to help prevent an imminently hazardous situation which, if not

avoided, will result in death or serious injury:

SThis UPS contains LETHAL VOLTAGES. All repairs and service should be performed by

AUTHORIZED SERVICE PERSONNEL ONLY. There are NO USER SERVICEABLE PARTS

inside the UPS.

Information in this document is subject to change without notice.

E 2009 Dell Inc. All rights reserved.

Reproduction in any manner whatsoever without the written permission of Dell Inc. is strictly forbidden.

Trademarks used in this text: Dell and the DELL logo are trademarks of Dell Inc.; Greenlee is a registered trademark of Greenlee Textron;

National Electrical Code and NEC are registered trademarks of National Fire Protection Association, Inc.; Phillips is a registered trademark

of Phillips Screw Company.

Other trademarks and trade names may be used in this document to refer to either the entities claiming the marks and names or their

products. Dell Inc. disclaims any proprietary interest in trademarks and trade names other than its own.

September 2009 • 164201789 4

3

Table of Contents |

Table of Contents

1 Introduction

Finding Information 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2 Safety Warnings

3 Installation

Inspecting the Equipment 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Unpacking the Cabinet 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Identifying the UPS Rear Panels 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Identifying the UPS Front Panel 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Rackmount Setup 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Installing the EBM 24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Installing the UPS 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Installing Remote Emergency Power-off 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Hardwiring the UPS Input 27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

UPS Initial Startup 29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4 Operation

UPS Startup and Shutdown 31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Starting the UPS 31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Starting the UPS on Battery 32. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

UPS Shutdown 32. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Control Panel Functions 33. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Changing the Language 34. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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|Table of Contents

Display Functions 34. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Startup Screen 34. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Screen Locked 35. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

UPS Status 35. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Event Log 38. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Measurements 39. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Control Screens 40. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Identification 41. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Settings 42. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Transferring the UPS Between Modes 46. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Transferring from Normal to Bypass Mode 46. . . . . . . . . . . . . . . . . . . . . . . . . .

Transferring from Bypass to Normal Mode 47. . . . . . . . . . . . . . . . . . . . . . . . . .

Setting Power Strategy 47. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Retrieving the Event Log 48. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Behavior on Overload 48. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Configuring Load Segments 49. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Controlling Load Segments Through the Display 49. . . . . . . . . . . . . . . . . . . . .

Configuring Automatic Start Delay 50. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Configuring Automatic on Battery Shutdown 51. . . . . . . . . . . . . . . . . . . . . . . .

Configuring Battery Settings 52. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Configuring the UPS for an EBM 52. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Running Automatic Battery Tests 53. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Configuring Automatic Battery Tests 53. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Configuring Automatic Restart 53. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5 Additional UPS Features

RS-232 and USB Communication Ports 54. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Dell Network Management Card (Optional) 56. . . . . . . . . . . . . . . . . . . . . . . . .

Dell UPS Management Software 57. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5

Table of Contents |

6 UPS Maintenance

UPS and Battery Care 58. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Transporting the UPS 58. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Storing the UPS and Batteries 60. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

When to Replace Batteries 60. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Testing Batteries 61. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Updating the UPS Firmware 61. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7 Specifications

8 Troubleshooting

Accessing Alarms and Conditions 66. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

UPS Status Menu 66. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Event Log Menu 67. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Typical Alarms and Conditions 67. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Silencing the Alarm 71. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6

|Introduction

Introduction

The Dellt Online Rack uninterruptible power system (UPS) protects your sensitive electronic

equipment from basic power problems such as power failures, power sags, power surges, brownouts, and

line noise.

Power outages can occur when you least expect them and power quality can be erratic. These power

problems have the potential to corrupt critical data, destroy unsaved work sessions, and damage

hardware — causing hours of lost productivity and expensive repairs.

With the Dell Online Rack UPS, you can safely eliminate the effects of power disturbances and guard

the integrity of your equipment. The UPS's flexibility to handle an array of network devices makes it the

perfect choice to protect your LANs, servers, workstations, and other electrical equipment.

Figure 1 shows the Dell Online Rack UPS.

Figure 1. The Dell Online Rack UPS

1

7

Introduction |

Providing outstanding performance and reliability, the UPS's unique benefits include:

SOnline UPS design with pure sine wave output. The UPS filters and regulates incoming AC power

and provides consistent power to your equipment without draining the battery.

STrue online double-conversion technology with high power density, utility frequency

independence, and generator compatibility.

SSelectable High Efficiency mode of operation.

S4U size that fits any standard 48 cm (19”) rack.

SStart‐on‐battery capability for powering up the UPS even if utility power is not available.

SMaintenance is simplified by allowing the safe replacement of batteries without powering down the

UPS.

SExtended runtime with an optional External Battery Module (EBM).

SEmergency shutdown control through the Remote Emergency Power-off (REPO) ports.

STwo standard communication ports (USB and DB-9 serial port).

SOptional Dell Network Management Card with enhanced communication capabilities for

increased power protection and control.

SAdvanced power management with the Dell UPS Management Software for graceful shutdowns

and power monitoring.

SSequential shutdown and load management through separate receptacle groups called load

segments.

SFirmware that is easily upgradable without a service call.

SBacked by worldwide agency approvals.

8

|Introduction

Finding Information

CAUTION: The Safety, Environmental, and Regulatory Information document provides important safety and

regulatory information.

What are You Looking For? Find It Here

SThe user's guide for my UPS

SThe user's guide for the Dell Network Management

Card

SDell UPS Management Software

NOTE: Documentation and software updates can be

found at support.dell.com.

Dell UPS Disc

SSpecifications

SHow to configure UPS settings

SHow to troubleshoot and solve problems

SHow to install REPO control

Dell UPS User's Guide

The user's guide is available on the Dell UPS disc and

on support.dell.com.

SSafety instructions

SRegulatory information

SRecycling information

Safety, Environmental, and Regulatory Information

SWarranty information

STerms and Conditions (U.S. only)

SEnd User License Agreement

Dell Warranty and Support Information

SSupport information Dell Support Website — support.dell.com

NOTE: Select your region or business segment to view

the appropriate support site.

9

Safety Warnings |

Safety Warnings

CAUTION: Before performing the procedures in this document, read and follow the safety instructions and

important regulatory information in your Safety, Environmental, and Regulatory Information document.

IMPORTANT SAFETY INSTRUCTIONS

SAVE THESE INSTRUCTIONS

This manual contains important instructions that you should follow during installation and

maintenance of the UPS and batteries. Please read all instructions before operating the equipment and

save this manual for future reference.

DANGER: Observe the following instruction to help prevent an imminently hazardous situation which, if not

avoided, will result in death or serious injury:

SThis UPS contains LETHAL VOLTAGES. All repairs and service should be performed by

AUTHORIZED SERVICE PERSONNEL ONLY. There are NO USER SERVICEABLE

PARTS inside the UPS.

WARNING: Observe the following instructions to help prevent a potentially hazardous situation which, if not

avoided, could result in death or injury:

SOnly qualified service personnel (such as a licensed electrician) shall perform the electrical

installation. Risk of electrical shock.

SFor UPS models with hardwired input, overcurrent protection for the output AC circuit(s) is to be

provided by others.

SFor UPS models with hardwired input, suitably rated disconnect switches for the output AC

circuit(s) are to be provided by others.

SOutput overcurrent protection and disconnect switch must be provided by others.

SThis UPS contains its own energy source (batteries). The output receptacles may carry live voltage

even when the UPS is not connected to an AC supply.

SDo not remove or unplug the input cord when the UPS is turned on. This removes the safety

ground from the UPS and the equipment connected to the UPS.

STo reduce the risk of fire, connect only to a circuit provided with branch circuit overcurrent

protection with an ampere rating in accordance with the National Electrical Code® (NEC®),

ANSI/NFPA 70 or your local electrical code:

UPS Output Power 208V 230V

3750W 30A 25A

4200W 30A 30A

2

10

|Safety Warnings

STo reduce the risk of fire or electric shock, install this UPS in a temperature and humidity

controlled, indoor environment, free of conductive contaminants. Ambient temperature must not

exceed 40°C (104°F). Do not operate near water or excessive humidity (95% maximum).

SUnpacking the cabinet in a low-temperature environment may cause condensation to occur in and

on the cabinet. Do not install the cabinet until the inside and outside of the cabinet are absolutely

dry (hazard of electric shock).

SIf the UPS requires any type of transportation, disconnect the internal UPS batteries before

transporting (see page 58).

CAUTION: Observe the following instructions to help prevent a potentially hazardous situation which, if not

avoided, may result in minor or moderate injury or in property damage incidents:

SFor PLUGABLE EQUIPMENT, the power outlet shall be installed near the equipment and shall

be easily accessible.

SServicing of batteries should be performed or supervised by personnel knowledgeable about

batteries and the required precautions. Keep unauthorized personnel away from batteries.

SBatteries can present a risk of electrical shock or burn from high short-circuit current. The

following precautions should be observed: 1) Remove watches, rings, or other metal objects; 2) Use

tools with insulated handles; 3) Wear rubber gloves and boots; 4) Do not lay tools or metal parts on

top of batteries; 5) Disconnect the charging source prior to connecting or disconnecting battery

terminals.

SDetermine if the battery is inadvertently grounded. If inadvertently grounded, remove the utility

source from the ground. Contact with any part of a grounded battery can result in electrical shock.

The likelihood of such shock can be reduced if such grounds are removed during installation and

maintenance (applicable to equipment and remote battery supplies not having a grounded supply

circuit).

SELECTRIC ENERGY HAZARD. Do not attempt to alter any battery wiring or connectors.

Attempting to alter wiring can cause injury.

SReplace batteries with the same number and type of batteries as originally installed in the UPS.

SProper disposal of batteries is required. Refer to your local codes for disposal requirements.

SNever dispose of batteries in a fire. Batteries may explode when exposed to flame.

SDo not open or mutilate the battery or batteries. Released electrolyte is harmful to the skin and

eyes and may be extremely toxic.

SThe UPS may be connected to a maximum of one External Battery Module (EBM).

11

Safety Warnings |

WARNING: Additional instructions for Rack-Mounted Systems

SYour rack kit has been approved only for the rack cabinet provided. It is your responsibility to

ensure that installation of the equipment into any other rack complies with all applicable

standards. Dell disclaims all liability and warranties with respect to combinations of equipment

with any other rack.

SBefore installing your equipment in a rack, install all front and side stabilizers. Failure to install

stabilizers can allow the rack to tip over.

SAlways load from the bottom up, and load the heaviest items first.

SDo not overload the AC power supply branch circuit that provides power to the rack.

SDo not stand or step on any components in the rack.

WARNING: Slide/rail mounted equipment is not to be used as a shelf or work space.

Do not add weight to slide/rail mounted equipment.

12

|Installation

Installation

This chapter explains:

SEquipment inspection

SUnpacking the cabinet

SUPS rear panels

SUPS setup and installation, including the External Battery Module (EBM)

SRemote Emergency Power-off (REPO) installation

SInitial startup

Inspecting the Equipment

If any equipment has been damaged during shipment, keep the shipping cartons and packing materials

for the carrier or place of purchase and file a claim for shipping damage. If you discover damage after

acceptance, file a claim for concealed damage.

To file a claim for shipping damage or concealed damage: 1) File with the carrier within 15 days of

receipt of the equipment; 2) Send a copy of the damage claim within 15 days to your service

representative.

NOTE: Check the battery recharge date on the shipping carton label. If the date has passed and the batteries

were never recharged, do not use the UPS. Contact your service representative.

3

13

Installation |

Unpacking the Cabinet

CAUTION: Unpacking the cabinet in a low-temperature environment may cause condensation to occur in and

on the cabinet. Do not install the cabinet until the inside and outside of the cabinet are absolutely dry (hazard

of electric shock).

CAUTION: The cabinet is heavy (see page 62). Use caution to unpack and move the cabinet.

Use care when moving and opening the carton. Leave the components packaged until ready to install.

To unpack the system:

1Open the outer carton and remove the accessories packaged with the cabinet (see Figure 2).

Figure 2. Unpacking the Cabinet

14

|Installation

2With one person on each side, carefully lift the cabinet out of the outer carton using the handles

on the cardboard and set it on a flat, stable surface (see Figure 3).

Place the cabinet in a protected area that has adequate airflow and is free of humidity, flammable

gas, and corrosion.

Figure 3. Lifting the Cabinet

3Discard or recycle the packaging in a responsible manner, or store it for future use.

15

Installation |

Identifying the UPS Rear Panels

This section shows the rear panels of the Dell Online Rack models.

UPS

Communication Bay

2m, L6-30P Power Cord

USB Port

One L6-30 Receptacle

(Load Segment 1)

REPO Ports

RS-232 Port

Ground Screw

Two IEC 320-C19 and Two L6-20 Receptacles

(Load Segment 2)

EBM Connector

Output Circuit Breaker

Figure 4. 3750W, 208V Rear Panel

16

|Installation

UPS

Communication Bay

Input Terminal Block

USB Port

Eight IEC 320-C13 Receptacles

(Load Segment 1)

REPO Ports

RS-232 Port

Ground Screw

Two IEC 320-C19 Receptacles

(Load Segment 2)

EBM Connector

Output Circuit Breaker

Figure 5. 3750W, 230V Rear Panel

UPS

Communication Bay

Input Terminal Block

USB Port

Four IEC 320-C19 and

Two L6-20 Receptacles

(Load Segment 1)

REPO Ports

RS-232 Port

Ground Screw

One L6-30 Receptacles

(Load Segment 2)

EBM Connector

Output Circuit Breaker

Figure 6. 4200W, 208V Rear Panel

17

Installation |

UPS

Communication Bay

Input Terminal Block

USB Port

Six IEC 320-C13 Receptacles

(Load Segment 2)

REPO Ports

RS-232 Port

Ground Screw

Four IEC 320-C19 Receptacles

(Load Segment 1)

EBM Connector

Output Circuit Breaker

Figure 7. 4200W, 230V Rear Panel

Identifying the UPS Front Panel

On/Off Button LCD Panel

Scroll Button (Down or Forward)

Select Button

Scroll Button (Up or Back)

Figure 8. The Dell Online Rack UPS Front Panel

18

|Installation

Rackmount Setup

CAUTION: The cabinet is heavy (see page 62): 1) Dell strongly recommends to remove the battery tray from the

UPS before lifting. 2) Lifting the cabinets into the rack requires a minimum of two people.

CAUTION: Removing the batteries should be performed or supervised by personnel knowledgeable about

batteries and the required precautions. Keep unauthorized personnel away from batteries.

CAUTION: If installing an optional EBM, install the EBM directly below the UPS.

NOTE: Mounting rails are required for each individual cabinet.

To install the UPS and optional EBM in a rack:

1Remove the internal battery trays from the UPS:

Loosen the thumbscrew on the battery retaining bracket and remove (see Figure 9).

Figure 9. Removing the Battery Retaining Bracket

19

Installation |

Pull the battery trays out using the plastic tabs and remove the battery trays (see Figure 10).

Figure 10. Removing the Battery Trays

2If installing additional UPSs, repeat Step 1 for each cabinet.

NOTE: The instructions are the same for square-hole racks and unthreaded, round-hole racks. The rails fit both

rack styles. The square-hole rack is shown in the illustrations.

3Select the proper holes in the rail for positioning the cabinet in the desired location in the rack.

The rails should be located at the bottom of the 4U space allocated for the UPS or 3U for the

EBM.

4Position the end of the left and right rails labeled FRONT facing inward.

20

|Installation

5Attach the rails to the rack:

Engage the back end of the rail until it fully seats on the vertical rack flange and the hook latch

locks in place (see Figure 11).

Pull the rail toward the front.

Push the front end of the rail until it fully seats on the vertical rack flange and the hook latch locks

in place.

Figure 11. Installing the Rails

21

Installation |

6Slide the cabinet into the rack (see Figure 12). Repeat for any additional cabinets.

Figure 12. Installing the Cabinet

7Secure the front of the cabinet to the rack using the four thumbscrews on the mounting brackets

(see Figure 13). Tighten by hand; do not use power tools. Repeat for any additional cabinets.

Figure 13. Securing the Cabinet

22

|Installation

8Install the UPS battery trays (see Figure 14).

Figure 14. Installing the Battery Trays

23

Installation |

9Replace the battery retaining bracket (see Figure 15).

10 Tighten the thumbscrew.

Torque the screw to 0.7 Nm (6.2 lb in).

NOTE: A small amount of arcing may occur when connecting the batteries. This is normal and does not damage

the unit or present any safety concern.

11 Connect the internal battery connectors and attach to the battery retaining bracket between the

two studs.

Figure 15. Replacing the Battery Retaining Bracket and Connecting the Internal Battery Connectors

24

|Installation

12 Install the UPS front cover (see Figure 16).

Figure 16. Installing the UPS Front Cover

Installing the EBM

NOTE: A small amount of arcing may occur when connecting an EBM to the UPS. This is normal and will not

harm personnel. Insert the EBM cable into the UPS battery connector quickly and firmly.

To install the optional EBM:

1Plug the EBM cable into the UPS battery connector (see Figure 17).

Figure 17. EBM Installation

25

Installation |

Installing the UPS

To install the UPS:

1If you plan to use Dell UPS Management Software, connect your computer to the USB port using

the supplied cable. For more information about communication options, see page 54.

2If your rack has conductors for grounding or bonding of ungrounded metal parts, connect the

ground cable (not supplied) to the ground bonding screw. See “Identifying the UPS Rear Panels”

on page 15 for the location of the ground bonding screw for each model.

3If an emergency power-off (disconnect) switch is required by local codes, see the following section,

“Installing Remote Emergency Power-off” (REPO) to install the REPO switch before powering on

the UPS.

4Plug the equipment to be protected into the UPS output receptacles, but do not turn on the

protected equipment.

5Make any necessary provisions for cord retention and strain relief.

NOTE: Verify that the total equipment ratings do not exceed the UPS capacity to prevent an overload alarm.

Installing Remote Emergency Power-off

REPO is used to shut down the UPS from a distance. For example, this feature can be used for shutting

down the load and the UPS by thermal relay, in the event of room overtemperature. When REPO is

activated, the UPS shuts down the output and all its power converters immediately. The UPS logic

power remains on to issue an alarm.

The REPO feature shuts down the protected equipment immediately and does not follow the orderly

shutdown procedure initiated by any power management software. Any devices that are operating on

battery power are also shut down immediately.

When the REPO switch is reset, the equipment will not return to utility or battery power until the UPS

is manually restarted.

The REPO contacts are normally open.

WARNING: The REPO circuit is an IEC 60950 safety extra low voltage (SELV) circuit. This circuit must be

separated from any hazardous voltage circuits by reinforced insulation.

CAUTION: The REPO must not be connected to any utility connected circuits. Reinforced insulation to the

utility is required. The REPO switch must have a minimum rating of 24 Vdc and 20 mA and be a dedicated

latching-type switch not tied into any other circuit. The REPO signal must remain active for at least 250 ms for

proper operation.

26

|Installation

CAUTION: To ensure the UPS stops supplying power to the load during any mode of operation, the input

power must be disconnected from the UPS when the emergency power-off function is activated.

NOTE: For Europe, the emergency switch requirements are detailed in Harmonized document HD-384-48 S1,

“Electrical Installation of the Buildings, Part 4: Protection for Safety, Chapter 46: Isolation and Switching.”

REPO Connections

Wire Function Terminal Wire Size Rating Suggested Wire Size

REPO L1 4–0.32 mm2 (12–22 AWG) 0.82 mm2 (18 AWG)

L2

NOTE: The pins must be open to keep the UPS running. If the UPS shuts down because the REPO connector

pins are shorted, restart the UPS by re-opening the REPO connector pins and turning on the UPS manually.

Maximum resistance in the shorted loop is 10 ohm.

NOTE: Always test the REPO function before applying your critical load to avoid accidental load loss.

Remove Jumper if

installed

Figure 18. REPO Connector

To install the REPO switch:

1Verify that the UPS is off and unplugged.

2Remove the REPO connector from the accessory kit.

NOTE: Verify that there is no jumper installed in the REPO connector. If a jumper is installed, remove it before

connecting to the REPO port.

3Connect the REPO connector to the REPO port labeled “IN” on the UPS rear panel.

4Optional. If you are daisy-chaining the REPO function with another UPS, you can shut down the

entire system using a single switch.

Connect the second REPO connector to the REPO port labeled “OUT.”

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Installation |

NOTE: A separate contact must simultaneously cause UPS input AC power to be removed.

5Connect the switch or circuit to the REPO connector on the UPS rear panel using insulated

0.75 mm2–0.5 mm2 (18–20 AWG) wire.

Optional. If you are daisy-chaining the REPO function with another UPS, connect the REPO port

labeled “OUT” to the REPO port labeled “IN” on the next UPS. Continue for each UPS. On the

last UPS in the daisy-chain, connect a REPO connector (without a jumper) in the REPO port

labeled “OUT.”

6Verify that the externally-connected REPO switch is not activated to enable power to the UPS

output receptacles.

7For hardwired models, continue to the following section, “Hardwiring the UPS Input.” Otherwise,

continue to “UPS Initial Startup” on page 29.

Hardwiring the UPS Input

WARNING: Only qualified service personnel (such as a licensed electrician) shall perform the electrical

installation. Risk of electrical shock.

The Dell Online Rack hardwired models require a dedicated branch circuit that meets the following

requirements:

S250V/30A, 2-pole circuit breaker (25A for 3750W/230V UPS models) to provide short circuit and

overcurrent protection

SThe protection device requires a two-pole disconnection device between the UPS output and the

load (see Figure 19)

SThe breaker must be wall-mounted and be readily accessible to the operator

SFor Europe, the breaker must meet the IEC/EN 60934 standard and have a contact air gap of at

least 3 mm

S200–240 Vac

SSingle-phase (4200W/208V model is split-phase)

S50/60 Hz

SFlexible metal conduit (recommended for ease of service and maintenance)

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|Installation

AC Mains

Wall

2-pole

Breaker

UPS

Line

Neutral

Figure 19. Circuit Breaker Diagram

To hardwire the UPS input:

1Switch off utility power at the distribution point where the UPS will be connected. Be absolutely

sure there is no power.

2Remove the terminal block cover (four screws) and retain.

Figure 20. Removing the Terminal Block Cover

3Punch a hole in the terminal block cover for the input conduit using a Greenlee® punch or similar

device. The hole accommodates 3/4” or 1” IMC conduit.

4Pull the input wire through the conduit, leaving approximately 2 ft (0.5m) of exposed wire. Attach

a flexible metal fitting to the end of the conduit.

29

Installation |

5Insert the conduit through the wiring access entry and attach the conduit fitting to the panel.

Strip 0.5” (1.5 cm) of insulation from the end of each incoming wire.

6Connect the input and ground wires to the terminal block according to Figure 21 and Table 1.

Figure 21. UPS Input Terminal Block

Table 1. UPS Wiring Specifications

Wire

Function

Terminal

Position UPS Wire Function Terminal Wire

Size Rating*

Tightening

Torque

Input 1Input Ground

5.26–16 mm2

(10–6 AWG) 2.26 Nm (20 lb in)

2L2/Neutral In

3L1 In

* Use 5.26 mm2 (10 AWG) 75_C copper wire minimum.

7Replace the terminal block cover.

8Continue to the following section, “UPS Initial Startup.”

UPS Initial Startup

To start up the UPS:

1Verify that the internal batteries are connected.

2If an optional EBM is installed, verify that the EBM is connected to the UPS.

3Verify that all load segment circuit breakers are in the ON position.

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|Installation

4For 3750W/208V models only. Verify that the power input to the UPS has a minimum of 30A

upstream overcurrent protection.

Plug the UPS power cord into a power outlet.

The UPS front panel display illuminates. The Dell startup screen changes to the UPS status

summary screen. The UPS front panel display shows the flashing Standby icon .

5For hardwired input models only. Switch the main utility breaker on.

The UPS front panel display illuminates. The Dell startup screen changes to the UPS status

summary screen. The UPS front panel display shows the flashing Standby icon .

6Press the button on the UPS front panel.

After the startup is complete, the status icon changes to the appropriate icon based on the UPS

operating mode (see Table 3 on page 36).

7On the UPS status summary screen, press the button to check for active alarms or notices.

Resolve any active alarms before continuing. See “Troubleshooting” on page 66.

If there are no active alarms, a “No Active Alarms” message appears.

8Verify that the Normal icon appears on the UPS status summary screen, indicating that the

UPS is operating normally and any loads are powered (see Table 3 on page 36).

9If an optional EBM is installed, see “Configuring the UPS for an EBM” on page 52.

10 To change other factory-set defaults, see “Operation” on page 31.

11 If you installed an optional REPO, test the REPO function:

Activate the external REPO switch. Verify the status change on the UPS display.

Deactivate the external REPO switch and restart the UPS.

NOTE: Dell recommends setting the date and time.

NOTE: At initial startup, the UPS sets system frequency according to input line frequency (input frequency

auto-sensing is enabled by default). After initial startup, auto-sensing is disabled until manually re-enabled by

output frequency setting.

NOTE: At initial startup, input voltage auto-sensing is enabled by default. After the subsequent startup,

auto-sensing is disabled until manually re-enabled by output voltage setting.

NOTE: The internal batteries charge to 90% capacity in less than 4 hours. However, Dell recommends that the

batteries charge for 48 hours after installation or long-term storage. If an optional EBM is installed, see the

recharge time listed in Table 14 on page 65.

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Operation |

Operation

This chapter contains information on how to use the UPS, including:

SUPS startup and shutdown

SControl panel and display functions

SRetrieving the Event Log

STransferring the UPS between modes

SSetting power strategy

SBehavior on overload

SConfiguring load segments, battery settings, and automatic restart

UPS Startup and Shutdown

NOTE: The button controls only the UPS output. The button has no effect on equipment connected to

the UPS.

To start up or shut down the UPS, see:

S“Starting the UPS” on page 31

S“Starting the UPS on Battery” on page 32

S“UPS Shutdown” on page 32

Starting the UPS

To start the UPS:

1Verify that the UPS power cord is plugged in.

2Switch on utility power where the UPS is connected.

The UPS front panel display illuminates. The Dell startup screen changes to the UPS status

summary screen. The UPS front panel display shows the Standby mode icon .

3Press the button on the UPS front panel.

After the startup is complete, the status icon changes to the appropriate icon based on the UPS

operating mode (see Table 3 on page 36).

4

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|Operation

4On the UPS status summary screen, press the button to check for active alarms or notices.

Resolve any active alarms before continuing. See “Troubleshooting” on page 66.

If there are no active alarms, a “No Active Alarms” message appears.

5Verify that the Normal mode icon appears on the UPS status summary screen, indicating that

the UPS is operating normally and any loads are powered.

Starting the UPS on Battery

NOTE: Before using this feature, the UPS must have been powered by utility power with output enabled at least

once.

NOTE: Utility power cannot be present at startup.

To start the UPS on battery:

1Press the button on the UPS front panel until the UPS beeps.

The UPS front panel display illuminates, and the UPS begins the startup sequence.

The UPS cycles through Standby mode to Battery mode. The Battery mode icon displays on

the UPS status summary screen. The UPS supplies power to your equipment.

NOTE: The UPS does not assume the load if you press the button less than three seconds.

2Press the button to check for active alarms or notices.

Ignore the “UPS on Battery” notice and notices that indicate missing utility power. Resolve other

active alarms before continuing. See “Troubleshooting” on page 66. After correcting the alarms,

restart if necessary.

You can prevent a battery start (requiring utility power at the next startup) by simultaneously pressing

the and buttons for three seconds. Battery start can be disabled. See the Start on Battery setting

on page 43.

UPS Shutdown

To shut down the UPS:

1Press the button on the front panel for three seconds.

The UPS begins to beep. The UPS transfers to Standby mode.

NOTE: Releasing the button before three seconds returns the UPS to its original operating state.

2Switch off utility power where the UPS is connected.

After utility power is removed, the UPS fully shuts down in ten seconds.

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Operation |

Control Panel Functions

The UPS has a three-button graphical LCD with dual color backlight. Standard backlight is used to

light up the display with white text and a blue background. When the UPS has a critical alarm, the

backlight changes the text to dark amber and the background to amber. See Figure 22.

Figure 22. Dell Online Rack UPS Control Panel

There are three buttons on the control panel:

SScroll up or back

SSelect

SScroll down or forward

Table 2 describes the functions of the LCD control buttons.

Table 2. Control Button Functions

Control Button Sequence Function

Press for less than one second Scroll back or up to the previous menu.

Press for longer than one

second

Return/exit back one menu layer without initiating a command

or changing a setting.

Press for less than one second Select the menu or option to be changed.

Press for longer than one

second

Save the setting being edited.

Press for less than one second Scroll forward or down to the next menu option.

Press both buttons for three

seconds

Temporarily disable the battery startup feature until the next

power cycle. The buzzer emits a one second beep to indicate

that Battery Start has been disabled.

Press all three buttons for five

seconds

Shortcut for defaulting the language back to English. The

buzzer emits a one second beep to indicate that the setting has

changed to English.

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|Operation

To select an option:

1When scrolling through the settings, the present setting displays for each selection.

2Press the button to select the option.

The current setting for the option flashes when selected.

3Use the or buttons to toggle the available options.

4Set the new option by holding the button again for one second.

The option stops flashing.

Changing the Language

Language selection is controlled through the user settings. See Table 6 page 42 for information on

available languages.

Display Functions

The UPS provides useful information about the UPS itself, load status, events, measurements,

identification, and settings through the front panel display.

Startup Screen

During startup, the Dell logo is the default screen. This startup screen displays for five seconds and then

defaults to the UPS status summary screen.

The display automatically returns to the UPS status summary screen when no button has been pushed

for 15 minutes and no other screen has been locked by a user. When you return to the status summary

screen, press the button for one second to exit back to the menu selections. Selecting UPS Status

from the main menu list enables you to scroll through all of the UPS status menu screens, including the

status summary screen.

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Operation |

Screen Locked

To lock a screen, press the button. The current view stays locked and does not automatically return

to the default screen after time-out. When the screen is locked, the image of a key appears on the UPS

status summary screen just to the left of the status icon. See Figure 23.

Pushing any button returns the normal button function, unlocks the screen, and removes the lock

symbol.

Figure 23. A Locked Screen

Only screens that have dynamic, real-time data updates can be locked. Applicable screens include the

status summary screen, measurement screens, active alarms, and the battery status screen.

UPS Status

The UPS status provides separate screens for the following information:

SStatus summary, including mode and load

SNotice or alarm status, if any are present

SBattery status, including state and charge level

See Table 3 for examples of the UPS status summary screens. The status icon in the upper right corner

of each status summary screen conveys the UPS status or mode.

Basic operating modes include:

SNormal mode

SHigh-efficiency mode

SBattery mode

SBypass mode

SStandby mode

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|Operation

Table 3. Status Summary Screens

Status Summary Screen Description

UPS Critical Failure

The UPS is in Fault mode. The status icon and background are flashing.

Battery Mode

The status icon and background of the icon are flashing.

An audible alarm (0.5 seconds on/4.5 seconds off) accompanies the switch to

Battery mode.

When the utility power returns, the UPS transfers to Normal mode operation

while the battery recharges.

Bypass Mode

The UPS is operating in Bypass mode through the static bypass switch. The status

icon and background of the icon are flashing. Battery mode is not available.

UPS in Overload Condition

The status icon and background of the icon are flashing.

Bad Battery Detected or Battery Disconnected

The status icon and background of the icon are flashing, along with the outer

shell of the battery symbol at the bottom.

UPS General Alarms Active

The status icon and background of the icon are flashing.

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Operation |

Table 3. Status Summary Screens (continued)

Status Summary Screen Description

Battery Test Status

The status when the UPS is performing a battery test.

Normal Mode

The UPS is operating in Normal mode from utility power. The UPS monitors and

charges the batteries as needed and provides filtered power protection to your

equipment.

High Efficiency Mode

The UPS is operating in High Efficiency mode.

Converter Mode

The UPS is operating in Converter mode.

Standby Mode

When the UPS is turned off and remains plugged into a power outlet, the UPS is

in Standby mode and utility power supplies the connected equipment. The UPS

is not supporting the load, but is ready to assume the load on command.

The notice and alarm screens are visible only when notices or alarms are active. There is a separate

screen for each active notice or alarm. If there are no active notices or alarms, a “No Active Alarms”

message appears in a single screen between the UPS status summary and the battery status screen. If

there are multiple notices or alarms, scroll through each notice or alarm screen to reach the first battery

status screen.

NOTE: Events are not shown in status summary screens. They appear only in the Event Log.

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|Operation

Table 4 describes the available battery status screens. Only one battery status is available at a time.

Table 4. Battery Status Screens

Battery Status Screen Description

Battery charging Batteries are charged in constant current mode.

Battery floating Batteries are charged in constant voltage mode.

Battery resting Batteries are connected but are not being charged or discharged.

(This is part of the normal charging cycle.)

Battery discharging Batteries are discharging.

Battery disconnected Batteries are unavailable because they are disconnected.

Charger disabled The battery charger is off. You can enable the Charger setting from the Settings

menu (see page 45).

Event Log

The Event Log holds up to 50 events. You can scroll through the event screens, beginning with the most

recent event.

NOTE: The date format is dependent on the language selection.

The first row of each event screen contains the date (MM/DD/YYYY) and time (hh:mm:ss) at which the

event occurred. The second row contains the type of event and code. The event description begins on

the third row and may continue to the fourth row. The bottom right corner of the event screen displays

two numbers: an ordering number of the event in the log, followed by the total number of events in the

log.

If there are no events in the log, the event screen displays “No events in log.”

See “Retrieving the Event Log” on page 48.

39

Operation |

Measurements

The measurements screens provide useful measurement information on:

SOutput watts VA, current, power factor, voltage, and frequency

SInput voltage and frequency

SBattery voltage and percentage charged

SInstantaneous Headroom Watts remaining

SPeak Headroom Watts (the remaining watts available to support the load at peak demand,

includes the date and timestamp of the peak demand)

SPeak Consumption Watts (the peak power demand on the UPS, includes the date and timestamp

of the peak demand)

SPresent kWh Consumption (the kWh demand on the UPS averaged over the past hour)

SCumulative kWh Consumption (the total kWh usage, includes the date and timestamp since it

was last reset)

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|Operation

Control Screens

Table 5 describes the available control screens.

Table 5. Control Screens

Control Screens Description

Go to Bypass Transfers the UPS system to internal Bypass mode.

When the Go to Bypass command is issued, the screen immediately shows the

message for five seconds: Manual Bypass Command. The option then changes to

Go to Normal.

When the Go to Normal command is issued, the screen immediately shows the

message Normal Mode Command Sent for five seconds. The option then changes

to Go to Bypass.

Battery Test Schedule Battery Test: yes | Cancel Battery test: no

Starts a manual battery test.

See “Testing Batteries” on page 61.

Reset Error State Reset Alarms: yes | no

Manually clears any latched alarms, such as bad battery detected or DC Bus

OV/UV.

If a bad battery alarm was also active, reset the battery test status to “Not

Tested.”

Load Segments Load segment 1: on | off

Load segment 2: on | off

These on/off commands override automatic load segment on/off controls made by

the Automatic Start Delay and Automatic On Battery Shutdown settings. See

“Configuring Load Segments” on page 49.

Restore Factory Settings Restore Factory Settings: yes | no

Available only in Standby mode.

Restoring the factory settings:

SReturns all user-configurable EEPROM settings to default factory settings

SResets all pending on/off commands

SClears the Event Log and resets all time stamps

SResets the battery test status

SInitiates the Self Diagnostics test

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Operation |

Identification

The identification screens display the following UPS information:

SType and model

SPart number

SSerial number

SUPS firmware

SNetwork Management Card (NMC) firmware

NOTE: The NMC firmware screen displays only if the NMC is installed. See “Dell Network Management Card“

on page 56.

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|Operation

Settings

Only available options are displayed.

User settings are not protected by default. You can enable the password through the User Password

setting.

Table 6 displays the options that can be changed by the user.

Table 6. Settings

Description Available Settings Default Setting

Change Language [English] [French] [German] [Spanish] [Japanese]

[Simplified Chinese] [Russian] [Korean]

[Traditional Chinese]

English

User Password [Enabled] [Disabled]

If Enabled, the default password is USER.

NOTE: If you enter an incorrect password, the

message “Wrong Password” appears. Press any

button to return to the password screen and retry

the password.

Disabled

Audible Alarms [Enabled] [Disabled]

NOTE: If you disable audible alarms, it takes effect

instantly and remains disabled, even after a power

cycle. This differs from the mute feature where the

horn is temporarily silenced on any button press,

but turns on again if a new alarm is triggered.

Enabled

Set Date and Time Set Month, Day, Year, Hours, Minutes, and Seconds

Date: mm/dd/yyyy

Time: hh:mm:ss

NOTE: The date format is dependent on the

language selection.

NOTE: Time is a 24-hour clock.

01/01/2009

12:00:00

Control Commands from Serial

Port

[Enabled] [Disabled]

If Enabled, control commands are accepted through

the serial port, USB ports, or option card.

If Disabled, configuration and load control

commands are restricted to LCD only.

Enabled

Output Voltage [200V] [208V] [220V] [230V] [240V]

[Auto-sensing]

Auto-sensing

Output Frequency [50Hz] [60Hz] [Auto-sensing] Auto-sensing

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Operation |

Table 6. Settings (continued)

Description Default SettingAvailable Settings

Overload Alarm Level [10%] [20%] [30%]...[100%]

If 100%, the UPS issues an Output Overload alarm

at load > 100%.

NOTE: Output Overload Level 1 by default is set to

100% and is configurable from 10% to 100% in 10%

increments through the LCD setting menu. This

allows customers to be alerted before the UPS has

reached its rated capacity limits.

100%

Power Strategy [Normal] [High Efficiency] [Converter]

See “Setting Power Strategy” on page 47.

High Efficiency

Automatic Start Delay [Off] [0s] [1s] [2s]...[32767s]

See “Configuring Load Segments” on page 49.

0s

Automatic on Battery Shutdown [Off] [0s] [1s] [2s]...[32767s]

See “Configuring Load Segments” on page 49.

Off

Start on Battery [Enabled] [Disabled]

NOTE: Battery start is disabled from the factory and

remains disabled until the UPS has been powered

from utility and enters Standby mode. After the

UPS has been started once from utility, the Start on

Battery feature is automatically enabled. After this is

set by the user, it remains set.

Enabled

Battery Saving Mode [Disabled] [10%] [20%] [30%]...[100%]

The UPS output is turned off in five minutes if the

UPS is on battery and output power is below the

selected level.

Disabled

On Battery Notice Delay [0] [1s] [2s]...[99s]

The UPS issues a “UPS on battery” notice in the

specified number of seconds after the UPS starts to

discharge the batteries.

0s

Site Wiring Fault Alarm [Enabled] [Disabled] Enabled for low

voltage models;

Disabled for all other

models

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|Operation

Table 6. Settings (continued)

Description Default SettingAvailable Settings

Bypass Voltage Low Limit [-6%] [-7%]...[-20%] of nominal

The Bypass operation is disabled if the measured

bypass voltage level is below the nominal output

voltage (-15%).

NOTE: The Qualify Bypass setting may overrule the

Bypass Voltage Low Limit setting.

-15% of nominal

Bypass Voltage High Limit [+6%] [+7%]...[+20%] of nominal

The Bypass operation is disabled if the measured

bypass voltage level is above the nominal output

voltage (+10%).

NOTE: The Qualify Bypass setting may overrule the

Bypass Voltage High Limit setting.

+10% of nominal

Qualify Bypass [Always] [Never] [Bypass Disabled]

If Always, Bypass operation is allowed when:

SBypass voltages > the value set for Bypass

Voltage Low Limit

SBypass voltages < the value set for Bypass

Voltage High Limit

SBypass frequency > (nominal frequency -3 Hz)

SBypass frequency < (nominal frequency +3 Hz)

SInverter is synchronized with Bypass when

unsynchronized transfers are disabled by the

value set for Unsynchronized Transfers

If Never, Bypass operation is always allowed; voltage

and frequency limits are not in use.

If Bypass Disabled, Bypass operation is prohibited.

Always

Synchronization Window [Sync Disabled] [±0.5 Hz] [±1.0 Hz] [±1.5 Hz]

[±2.0 Hz] [±2.5 Hz] [±3.0 Hz]

If ±3.0 Hz, on inverter operation the inverter tries to

synchronize with the Bypass when the Bypass

frequency is not more than 3 Hz from the nominal

output frequency; otherwise, the inverter goes to

nominal frequency. On Bypass mode, the sync

window is always ±3 Hz.

NOTE: In Sync Disabled state, if the Bypass

operation is allowed, the UPS synchronizes only

when it is operating on Bypass mode.

±3.0 Hz

45

Operation |

Table 6. Settings (continued)

Description Default SettingAvailable Settings

Unsynchronized Transfers [Enabled] [Disabled]

If Enabled, unsynchronized transfers to the Bypass

are allowed.

If Disabled, unsynchronized transfers to the Bypass

are not allowed.

NOTE: The Qualify Bypass setting may overrule the

Unsynchronized Transfers setting.

Enabled

External Battery Module (EBM) [0] [1]

See “Configuring the UPS for an EBM” on page 52.

0

Charger [Enabled] [Disabled]

If Enabled, batteries charge normally.

If Disabled, the battery charger is off.

Enabled

Battery Charge % to Restart [0 %] [10%] [20%] [30%]...[100%]

When enabled, automatic restart is made when the

battery charge state reaches the selected level. If set

to 0, the feature is disabled.

0 %

Battery Low Alarm [Immediate] [2 min] [3 min] [5 min]

If you select a value, the battery low alarm triggers

when the set amount of backup time

(approximately) remains in the batteries.

If Immediate, the battery low alarm activates at the

same time as the “UPS on Battery” notice.

3 min

Automatic Battery Tests [Enabled] [Disabled]

See “Running Automatic Battery Tests” on page 53.

Enabled

Reset Peak Consumption Watts [No] [Yes]

If No, no action.

If Yes, the Peak Consumption Watts value is

cleared and the date and time stamp for this

statistic is set to the current date and time.

No

Reset Cumulative Consumption

kWh

[No] [Yes]

If No, no action.

If Yes, the Cumulative Consumption kWh value is

cleared and the date and time stamp for this

statistic is set to the current date and time.

No

46

|Operation

Table 6. Settings (continued)

Description Default SettingAvailable Settings

Reset Peak Headroom Watts [No] [Yes]

If No, no action.

If Yes, the Peak Headroom Watts value is cleared

and the date and time stamp for this statistic is set

to the current date and time.

No

Clear Event Log The number after “Total events” shows how

many events are currently stored in the log.

Press the button for one second to reset

the event count to zero and clear the log.

—

LCD Contrast [-5], [-4], [-3], [-2], [-1], [+0], [+1], [+2], [+3],

[+4], [+5]

The LCD Contrast is adjustable and the valid range

is from -5 to +5. This range covers the maximum

adjustment for contrasting the background with the

text in the visual display of the control panel.

[+0]

Transferring the UPS Between Modes

Transferring between modes includes:

STransferring from Normal to Bypass mode

STransferring from Bypass to Normal mode

Transferring from Normal to Bypass Mode

To transfer from Normal to Bypass mode:

1Press the button for one second to go to the main menu selection and scroll down to the

Control menu using the button.

2Press the button to enter the Control menu.

3Select Go to Bypass.

The text on the screen changes to Manual Bypass Command Sent. The Bypass mode icon

flashes, indicating Bypass mode.

47

Operation |

Transferring from Bypass to Normal Mode

To transfer from Bypass to Normal mode:

1Press the button for one second to go to the main menu selection and scroll down to the

Control menu using the button.

2Press the button to enter the Control menu.

3Select Go to Normal.

The text on the screen changes to Normal Command Sent. The Normal mode icon flashes,

indicating Normal mode.

Setting Power Strategy

On the High Efficiency setting, the UPS operates normally on Bypass, transfers to inverter in < 10 ms

when utility power fails, and transfers back to Bypass in one minute after utility power returns. The

Bypass mode status icon box appears on the UPS status summary screen when the UPS transfers to

Bypass.

NOTE: High Efficiency operation is available after one minute of stable power.

To set the power strategy:

1Press the button for one second to go to the main menu selection and scroll down to the

Settings menu using the button.

2Press the button to enter the Settings menu.

3Use the button to scroll to Power Strategy and press the button.

The current setting for the option flashes when selected.

4Select High Efficiency, Normal, or Converter using the and buttons.

The default is High Efficiency.

5Press the button to confirm.

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|Operation

Retrieving the Event Log

To retrieve the Event Log through the display:

1Press the button for one second to go to the main menu selection and scroll down to the

Event Log menu using the button.

2Press the button to enter the Event Log list.

3Scroll through the listed events, notices, and alarms using either the button or the button.

4To return to the main menu, press the button for one second. The Event Log displays.

5Press the button. The UPS status screen displays.

Behavior on Overload

See Table 7 for an explanation of how the UPS responds to an overload condition.

Table 7. Behavior on Overload

Overload

Severity Load Level On Utility Power On Bypass/High

Efficiency Mode On Battery

Level 1 Load 100% to

101%

Overload alarm only and

support load indefinitely

Overload alarm only

and support load

indefinitely

Overload alarm only,

support load until low

battery shutdown level

is reached

Level 2 Load 102% to

110%

Transfer to Bypass after

12 seconds (±1 sec)

If Bypass is not available,

transfer to Fault mode after

12 seconds (±1 sec)

Transfer to Fault mode

in 2 minutes (±1 sec)

Transfer to Fault mode

after 12 seconds

(±1 sec) or until low

battery shutdown level

is reached

Level 3 Load > 110% Transfer to Bypass immediately

If Bypass is not available,

transfer to Fault mode in

300 ms to 1 sec

Transfer to Fault mode

in 300 ms to 1 sec

Transfer to Fault mode

in 300 ms to 1 sec

49

Operation |

Configuring Load Segments

Load segments are sets of receptacles that can be controlled by the Dell UPS Management Software,

the Dell Network Management Card, or through the LCD display, providing an orderly shutdown and

startup of your equipment. For example, during a power outage, you can keep key pieces of equipment

running while you turn off other equipment. This feature allows you to save battery power.

Each Dell Online Rack model has two configurable load segments. See “Identifying the UPS Rear

Panels” on page 15 for the load segment locations.

To control the load segments with power management software, see your power management software

manual for details (refer to the Software CD or www.dell.com for the latest information).

Controlling Load Segments Through the Display

To control the load segments through the display:

1Press the button for one second to go to the main menu selection and scroll down to the

Control menu using the button.

2Press the button to enter the Control menu.

3Use the button to scroll to Load Segments.

4Press the button.

The current setting for the option flashes when selected.

5Select the desired load segment using the and buttons.

6Set the desired load segment ON or OFF using the button.

7Press the button to confirm.

8Set the other load segment if applicable.

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|Operation

Configuring Automatic Start Delay

You can configure the load segment to turn on automatically after the utility power returns, if it was

shut down by:

SThe button

SAn external command with auto-restart option

SBattery under voltage state

SAutomatic on battery shutdown command

You can specify the restart delay time for each load segment: select zero seconds (0s is the default) to

restart immediately, select 1–32767 seconds to delay for the specified time, or select Off.

To set the restart delay times for each load segment:

1Press the button for one second to go to the main menu selection and scroll down to the

Settings menu using the button.

2Press the button to enter the Settings menu.

3Use the button to scroll to the Automatic Start Delay option and press the button.

The current setting for the option flashes when selected.

4Set the restart delay for one load segment using the and buttons.

5Press the button to confirm.

6Set the restart delay for the other load segment if applicable.

7Press the button to confirm.

NOTE: Load segment On/Off commands issued through the Control menu override the user settings for load

segments.

NOTE: A single load segment delay applies to both outlets. However, there is an additional built-in one-second

delay between closing segment 1 and 2. The delay is always present when an On command is issued for both

segments at the same time.

51

Operation |

Configuring Automatic on Battery Shutdown

If set to Off (default), the load segment turns off only when commanded manually by the button,

an external command, or through the display (Control > Load Segments).

If set to zero seconds (0s), the load segment turns off automatically when the UPS on Battery state

activates.

If you select a value, the load segment turns off automatically after the selected delay while the UPS

operates on battery, but the shutdown is cancelled if the utility returns before the delay has expired.

To set the shutdown times for each load segment:

1Press the button for one second to go to the main menu selection and scroll down to the

Settings menu using the button.

2Press the button to enter the Settings menu.

3Use the button to scroll to the Automatic on Battery Shutdown option and press the button.

The options display and the current settings flash when selected.

4Set the shutdown delay for one load segment using the and buttons.

5Press the button to confirm.

6Set the shutdown delay for the other load segment if applicable.

7Press the button to confirm.

52

|Operation

Configuring Battery Settings

Configure the UPS settings for an installed EBM, including whether to run automatic battery tests and

automatic restart configuration.

Configuring the UPS for an EBM

If the UPS is not configured for the EBM, the UPS reports less battery time remaining on the UPS front

panel and to any remote software. You may receive a shutdown warning prematurely. To ensure

maximum battery runtime when using power management software, configure the UPS for the EBM:

1Press the button for one second to go to the main menu selection and scroll down to the

Settings menu using the button.

2Press the button to enter the Settings menu.

3Use the button to scroll to the External Battery Module option and press the button.

The battery number value begins to flash.

4Set the battery number value using the and buttons.

Configuration Setting

UPS only (internal batteries) 0 (default)

UPS + 1 EBM 1

NOTE: Runtime is automatically adjusted based on present load levels and whether an EBM is configured.

5Press the button to confirm.

53

Operation |

Running Automatic Battery Tests

The automatic discharge test, enabled by default, runs during the transition from Float to Rest mode.

After the test completes, the charge cycle restarts to completely charge the batteries and then continues

to Rest mode normally. The automatic test runs approximately once every three months and does not

run again until after three more Float to Rest mode transitions. If a manual battery test is requested, the

automatic battery test timer is reset so it will not run for the next three months.

For an automatic battery test to run:

SThe Automatic Battery Tests setting must be enabled for the automatic battery tests to run. (See

the following section, “Configuring Automatic Battery Tests.”)

SThe batteries must be fully charged.

SThe UPS must be in Normal mode or High Efficiency mode with no active alarms.

SThe load must be higher than 10%.

Configuring Automatic Battery Tests

To configure the automatic battery tests:

1Press the button for one second to go to the main menu selection and scroll down to the

Settings menu using the button.

2Press the button to enter the Settings menu.

3Use the button to scroll to the Automatic Battery Tests option and press the button.

The option begins to flash.

4Select whether to enable or disable the automatic battery test using the and buttons.

5Press the button to confirm.

Configuring Automatic Restart

The UPS automatically restarts if the utility power returns after the output was shut off due to depleted

batteries, a shutdown input signal, or automatic shutdown command.

You can set the load segment for the amount of time to delay the restart when utility power returns,

using the Automatic Start Delay setting. You can also configure UPS restart to depend on the battery

charge level, using the Battery Charge % to Restart setting.

54

|Additional UPS Features

Additional UPS Features

This chapter describes:

SCommunication ports (RS-232 and USB)

SDell Network Management Card

SDell UPS Management Software

RS-232 and USB Communication Ports

To establish communication between the UPS and a computer, connect your computer to one of the

UPS communication ports using an appropriate communication cable (RS-232 cable not supplied). See

“Identifying the UPS Rear Panels” on page 15 for the communication port locations.

When the communication cable is installed, power management software can exchange data with the

UPS. The software polls the UPS for detailed information on the status of the power environment. If a

power emergency occurs, the software initiates the saving of all data and an orderly shutdown of the

equipment.

The cable pins for the RS-232 communication port are identified in Figure 24, and the pin functions are

described in Table 8.

3

879

1

6

245

Figure 24. RS-232 Communication Port (DB-9 Connector)

5

55

Additional UPS Features |

Table 8. RS-232 Communication Port Pin Assignment

Pin Signal Name Function Direction from the UPS

1 Unused —

2 Tx Transmit to external device Out

3 Rx Receive from external device In

4 Unused —

5 GND Signal common (tied to chassis) —

6 Unused —

7 Unused —

8 Unused —

9 Unused —

*Unused pins must be left free on all models.

56

|Additional UPS Features

Dell Network Management Card (Optional)

The Dell Online Rack UPS has one available communication bay, which supports the optional Dell

Network Management Card. See Figure 25 for the location of the communication bay.

It is not necessary to shut down the UPS before installing a communication card.

1Remove the slot cover secured by two screws. Retain the screws.

2Insert the communication card into the slot.

3Secure the card with both screws.

Figure 25. Dell Network Management Card

For details on disabling control commands from the Dell Network Management Card, see the Control

Commands from Serial Port setting on page 42.

Refer to the Dell Network Management Card User's Guide for more information.

57

Additional UPS Features |

Dell UPS Management Software

Each Dell Online Rack UPS ships with Dell UPS Management Software.

Dell UPS Management Software provides up-to-date graphics of UPS power and system data and power

flow. It also gives you a complete record of critical power events, and it notifies you of important UPS or

power information. If there is a power outage and the Dell Online Rack UPS battery power becomes

low, the software can automatically shut down your computer system to protect your data before the

UPS shutdown occurs.

For details on disabling control commands from the software, see the user setting for Control

Commands from Serial Port setting on page 42.

58

|UPS Maintenance

UPS Maintenance

This chapter explains how to:

SCare for the UPS and batteries

STransport the UPS

SStore the UPS and batteries

STest the batteries

SUpdate the UPS firmware

UPS and Battery Care

For the best preventive maintenance, keep the area around the UPS clean and dust‐free. If the

atmosphere is very dusty, clean the outside of the system with a vacuum cleaner. For full battery life,

keep the UPS at an ambient temperature of 25°C (77°F).

NOTE: The batteries in the UPS are rated for a 3–5 year service life. The length of service life varies, depending

on the frequency of usage and ambient temperature. Batteries used beyond expected service life will often

have severely reduced runtimes. Replace batteries at least every 5 years to keep units running at peak

efficiency.

Transporting the UPS

NOTE: The internal UPS batteries MUST be disconnected before transportation.

CAUTION: The following procedure should be performed or supervised by personnel knowledgeable about

batteries and the required precautions. Keep unauthorized personnel away from batteries.

If the UPS requires any type of transportation, the batteries must be disconnected (but not removed)

before the unit is transported:

1Verify that the UPS is off and unplugged.

2Place the UPS on a flat, stable surface with the front of the cabinet facing you.

6

59

UPS Maintenance |

3Remove the UPS front cover (see Figure 26).

Figure 26. Removing the UPS Front Cover

4Disconnect the internal battery connectors (see Figure 27).

Figure 27. Disconnecting the Internal Battery Connector

60

|UPS Maintenance

5Replace the UPS front cover (see Figure 28).

Figure 28. Replacing the UPS Front Cover

Storing the UPS and Batteries

If you store the UPS for a long period, recharge the battery every 6 months by plugging the UPS into a

power outlet. The batteries charge to 90% capacity in approximately 4 hours. However, it is

recommended that the batteries charge for 48 hours after long-term storage.

Check the battery recharge date on the shipping carton label. If the date has passed and the batteries

were never recharged, do not use the UPS. Contact your service representative.

When to Replace Batteries

When the status summary screen displays the UPS fault icon with the “Service Battery” alarm and the

audible alarm sounds continuously, the batteries may need replacing. Contact your service

representative to order new batteries.

NOTE: With the user-replaceable battery feature, UPS batteries can be replaced easily without turning the UPS

off or disconnecting the load.

61

UPS Maintenance |

Testing Batteries

For a battery test to run:

SThe batteries must be fully charged.

SThe UPS must be in Normal mode or High Efficiency mode with no active alarms.

SThe load must be higher than 10%.

To test batteries:

1Plug the UPS into a power outlet for at least 48 hours to charge the batteries.

2Press the button for one second to go to the main menu selection and scroll down to the

Control menu using the button.

3Press the button to enter the Control menu.

4Use the button to scroll to the Battery Test option.

5Press the button to start the battery test.

During the battery test, the UPS transfers to Battery mode and discharges the batteries for 25% of

the original expected runtime. The front panel displays “Battery test running” and the percentage

of the test completed. The results display on the UPS front panel when complete.

Updating the UPS Firmware

To keep the UPS firmware updated with the latest improvements and benefits, visit www.dell.com for

updates. You can download the latest firmware version and the instructions for installing it.

62

|Specifications

Specifications

This chapter provides the following specifications:

SModel list

SDimensions and weights

SElectrical input and output

SEnvironmental and safety

SBattery

SUPS block diagram

Table 9. UPS Model List

208V Model 230V Models

UPS Models 3750R OL (K804N), 3750W

4700R OL (J730N), 4200W

3750R OL (H952N), 3750W

4200R OL (K805N), 4200W

External Battery Module

(EBM)

3750R and 4200R EBM (J739N), 192 Vdc/30A

Table 10. Dimensions and Weights

UPS Models EBM Model

UPS Dimensions

(W H D)

438.0 171.5 801.4 mm

(17.2” 6.8” 31.5”) - 4U

438.0 127.0 735.0 mm

(17.2” 5.0” 29.0”) - 3U

Weights 66.0 kg (145.5 lb) 53.0 kg (116.8 lb)

7

63

Specifications |

Table 11. Electrical Input

208V Models 230V Models

Nominal Voltage 200–220V 220–240V

Voltage Range

(Engineering Specifications)

155–255V auto-sensing 160–286V auto-sensing

Nominal Frequency 50/60 Hz auto-sensing, ±3 Hz

Efficiency (Normal mode) >95%

Noise Filtering Full-time EMI/RFI filtering

Connections 3750W: 2m, L6-30P attached

power cord

4200W: Hardwired

3750W: Hardwired

4200W: Hardwired

Table 12. Electrical Output

208V Models 230V Models

Power Levels

(rated at nominal inputs)

3750W

4200W

3750W

4200W

Regulation (Normal mode) -6% to +6% of nominal voltage

NOTE: This varies based on auto-detected input voltage or customer settings.

Regulation (Battery mode),

Nominal Voltage ±5%

-6% to +6% of nominal voltage

NOTE: This varies based on auto-detected input voltage or customer settings.

Voltage Waveform Sine wave

Output Receptacles 3750W: (2) L6-20R; 20A

(1) L6-30R, 30A

(2) IEC 320-C19, 20A

4200W: (2) L6-20R; 20A

(1) L6-30R, 30A

(4) IEC 320-C19, 20A

3750W:(8) IEC 320-C13; 10A for IEC,

15A for UL

(2) IEC 320-C19, 16A for IEC,

20A for UL

4200W:(6) IEC 320-C13; 10A for IEC,

15A for UL

(4) IEC 320-C19, 16A for IEC,

20A for UL

64

|Specifications

Table 13. Environmental and Safety

208V Models 230V Models

Operating Temperature Up to 1,500 meters: 0°C to 40°C (32°F to 104°F); UL tested 25°C (77°F)

Above 1,500 meters: 0°C to 35°C (32°F to 95°F)

Transit/Storage

Temperature

-15°C to 60°C (5°F to 140°F)

Relative Humidity 0–95% noncondensing

Operating Altitude Up to 3,048 meters (0–10,000 ft) above sea level

Audible Noise Less than 55 dBA on line/bypass mode (less than 75% load), room temperature

Fan Speed Off: when the UPS is in Standby mode or there is no load

Low speed: when the load is < 80%

High speed: when the load is >80% or the UPS is in Battery mode

Surge Suppression ANSI/IEEE C62.41; 1991 Category B3

Safety Conformance UL 1778 4th Edition;

CSA C22.2, No. 107.3

UL 1778 4th Edition;

CSA C22.2, No. 107.3;

IEC/EN 62040-1-1; IEC/EN 60950-1

Safety Markings UL, cUL, VCCI UL, cUL, CE, GS, GOST, BSMI,

S-MARK, KC, NRCS, C-tick

EMC (Class A) FCC Part 15, ICES-003, VCCI IEC/EN 62040-2; EN 55022/CISPR 22;

ICES-003; CNS14757-2;

AS/NZS 62040.2;

FCC Part 15; KN22; GB7260.2;

EN 55024/CISPR 24

65

Specifications |

Table 14. Battery

Configuration 3700W: (16) 12V, 7.2 Ah internal batteries; (16) 12V, 7.2 Ah EBM

4200W: (16) 12V, 7.2 Ah internal batteries; (16) 12V, 7.2 Ah EBM

Battery Type CSB GP1272 7.2 Ah or YUASA NP7-12 7Ah

Voltage 3750W: 192 Vdc internal, 192 Vdc/30A EBM

4200W: 192 Vdc internal, 192 Vdc/30A EBM

Fuses UPS: (1) 30A fuse

EBM: (1) 30A fuse

Type Sealed, maintenance‐free, valve‐regulated, lead‐acid

Charging Approximately 4 hours to 90% usable capacity at nominal line and no

supplementary power supply load

Monitoring Advanced monitoring for earlier failure detection and warning

Battery Runtimes* 3750W internal batteries: 5 minutes at full load/21 minutes at half load

4200W internal batteries: 5 minutes at full load/16 minutes at half load

3750W with one EBM attached: 14 minutes at full load/43 minutes at half load

4200W with one EBM attached: 11 minutes at full load/35 minutes at half load

*Battery runtimes are approximate and vary depending on the load configuration and battery charge.

Battery

DC/DC

Input

Filter

Output

Filter

Bypass

Charger

DC/AC

Inverter

AC/DC

Boost

Figure 29. Online UPS Block Diagram

66

|Troubleshooting

Troubleshooting

The Dell Online Rack UPS is designed for durable, automatic operation and issues alarms to alert you

whenever potential operating problems occur. Usually the alarms shown by the control panel do not

mean that the output power is affected. Instead, they are preventive alarms intended to alert the user.

Active alarms and active notices are accompanied by an audible buzzer.

Accessing Alarms and Conditions

The control panel provides troubleshooting information from two main menus:

SUPS Status menu: access to all active alarms

SEvent Log menu: access to the most recent 50 events, which may include active and closed alarms

UPS Status Menu

From the UPS Status menu, you can access the following screens for troubleshooting information:

SStatus summary screen: The status summary screen provides information on both mode and load.

When there is a critical alarm, the status summary screen changes from its normal white text on a

blue background to dark amber text on an amber background.

SNotice or alarm screens: A separate screen appears for each active notice or alarm. If there are no

active alarms or notices, the display reads “No Active Alarms.”

SBattery status screen: The battery status screen indicates the battery charge mode, the percent the

battery is charged, and the runtime with the present load level.

NOTE: When an alarm is active, the control panel automatically displays an active alarm screen unless the

screen lock is enabled by the user.

To access troubleshooting information using the UPS Status menu:

1Press the button for one second to go to the main menu selection.

2Press the button to access the UPS Status menu.

3Press the button to access the UPS status summary screen.

The UPS status summary screen provides load information. The status icon indicates the UPS

operating mode (see Table 3 on page 36).

4Use the button to scroll through the active notice and active alarm screens.

5After scrolling through all alarms, press the button to access the Battery Status screen.

8

67

Troubleshooting |

Event Log Menu

From the Event Log menu, you can access the last 50 events, which includes events, notices, and

alarms, arranged from newest to oldest.

Events are silent conditions that are recorded in the Event Log as status information, such as “Clock Set

Done.” Events do not require a response.

Notices and alarms are records of when events occurred and, if applicable, when they were cleared.

SNotices, including active notices, are recorded in the Event Log. Active notices, such as “UPS on

Battery,” are announced by an intermittent beep. Notices do not normally require a response.

SAlarms, including active alarms, are recorded in the Event Log. Active alarms are announced by an

intermittent beep. Examples are “Output Overload” and “Heatsink Overtemperature.” Active

alarms require a response.

The Main Status Menu displays by default. To access troubleshooting information using the Event Log

menu:

1Press the button for one second to go to the main menu selection and scroll down to the

Event Log menu using the button.

2Click the button to enter the Event Log list.

3Scroll through the listed events, notices, and alarms using the or button.

Typical Alarms and Conditions

Table 15 describes typical alarms and conditions.

Table 15. Typical Alarms and Conditions

Alarm or Condition Possible Cause Action

The UPS does not provide or

indicate the expected backup

time.

The batteries need charging or

service.

Apply utility power for 48 hours to charge the

batteries. If the condition persists, contact

your service representative.

Power is not available at the

UPS output receptacles.

The UPS is in Standby mode. Supply power to the connected equipment by

pressing the On/Off button until the front

panel displays the UPS status summary screen.

The UPS does not start.

(The LCD is off.)

Power is not connected. Check the power connections. Also ensure

that the battery is plugged in.

The UPS operates normally,

but some or all of the

protected equipment is not

on.

The equipment is not

connected correctly to the UPS.

Verify that the equipment is plugged into the

UPS receptacles. Also verify that the load

segment is on.

68

|Troubleshooting

Table 15. Typical Alarms and Conditions (continued)

Alarm or Condition ActionPossible Cause

Battery test did not run or

was interrupted.

One of the conditions listed in

“Running Automatic Battery

Tests” on page 53 was not

present.

Resolve the condition, then restart the test.

The UPS does not transfer to

Bypass mode.

The bypass utility does not

qualify.

Check the bypass utility. The UPS is receiving

bypass utility power that may be unstable or in

brownout conditions.

Bypass mode is disabled. Check that the Bypass settings are configured

correctly. See “Settings” on page 42.

UPS on Bypass

(Notice 169)

Continuous Alarm

The UPS is operating from

Bypass mode.

The equipment transferred to bypass utility

power. Battery mode is not available and your

equipment is not protected; however, the

utility power continues to be passively filtered

by the UPS. Check for one of the following

alarms: overtemperature, overload, or UPS

failure.

On Manual Bypass

(Notice 143)

Intermittent Alarm

UPS was manually commanded

to transfer to Bypass mode and

will remain in bypass until

commanded.

None.

UPS on Battery

(Notice 168)

Intermittent Alarm

A utility failure has occurred

and the UPS is in Battery mode.

The UPS is powering the equipment with

battery power. Prepare your equipment for

shutdown.

Battery Disconnected

(Alarm 199)

Continuous Alarm

The UPS does not recognize the

internal batteries.

If the condition persists, contact your service

representative.

Battery voltage is lower than the

batteries disconnected level

defined for this UPS. This may

be due to a blown fuse,

intermittent battery

connection, or battery cable

being disconnected.

Verify that all batteries are properly connected.

If the condition persists, contact your service

representative.

Low Battery Warning

(Alarm 56)

Continuous Alarm

Battery time remaining or

battery capacity is lower than

the battery low warning level

defined for this UPS.

This warning is approximate. The actual time to

shutdown may vary depending on the UPS load

and presence of an External Battery Module

(EBM).

69

Troubleshooting |

Table 15. Typical Alarms and Conditions (continued)

Alarm or Condition ActionPossible Cause

Shutdown Imminent

(Alarm 55)

Continuous Alarm

Communication to external

devices stops because the UPS

has entered a state where it may

abruptly stop operating without

further notice unless utility

returns.

The alarm is issued when the battery time

remaining reaches zero. All connected devices

should have already shut down gracefully.

Battery Test Failed

(Alarm 191)

Intermittent Alarm

A weak battery string was

detected during the last battery

test.

This is a warning notice. Dell recommends

that you replace the batteries soon.

Service Battery

(Alarm 149)

Continuous Alarm

A faulted battery string has

been detected and as a result,

the charger is disabled.

Contact your service representative.

Utility Not Present

(Alarm 59)

Intermittent Alarm

Utility level has fallen below the

Utility Not Present threshold

(typically <25 to 50V).

Transfer to battery if supporting load. Power

down if not supporting load.

Bypass Not Available

(Alarm 105)

Utility is outside of the bypass

limits defined in the UPS.

Check the bypass settings. See “Settings” on

page 42.

Input AC Over Voltage

(Alarm 6)

Intermittent Alarm

Utility voltage exceeds the

maximum operating range.

The UPS transfers to Battery mode if

supporting load.

Input AC Under Voltage

(Alarm 7)

Intermittent Alarm

Utility voltage is below the

minimum operating range.

The UPS transfers to Battery mode if

supporting load.

Input Under/Over Frequency

(Alarm 8)

Intermittent Alarm

The utility frequency is out of

usable frequency range.

The UPS transfers to Battery mode if

supporting load.

Site Wiring Problem

(Alarm 194)

Continuous Alarm

An alarm triggers when the

difference between ground and

neutral voltage is >15V.

Have a qualified electrician correct the wiring

problem. If the UPS is not wired with a neutral

wire, Site Fault should be disabled in the

Settings menu (see page 42).

Remote Emergency Power

Off

(Alarm 12)

Continuous Alarm

The external contacts in the

rear of the UPS are configured

for REPO operation and they

have been activated.

The UPS de-energizes the load and enters

Standby mode. See “Installing Remote

Emergency Power-off” on page 25 for more

information.

70

|Troubleshooting

Table 15. Typical Alarms and Conditions (continued)

Alarm or Condition ActionPossible Cause

Output Overload

(Alarm 25)

Continuous Alarm

The load level is at or has

exceeded the configurable

threshold limit for a Level 1

Overload condition.

The UPS can support the load indefinitely at

this load level.

The alarm clears when the load drops below

5% of the set point.

Output Overload Level 2

(Alarm 159)

Continuous Alarm

The load level is >101% and

<110% of the UPS rating.

Remove some of the equipment from the

UPS. The UPS continues to operate, but

transfers to Fault mode in two minutes.

The alarm clears when the load drops below

5% of the set point.

Output Overload Level 3

(Alarm 162)

Continuous Alarm

The load is >110% of the UPS

rating.

Remove some of the equipment from the

UPS. The UPS continues to operate, but

transfers to Fault mode in 300 ms to one

second.

The alarm clears when the load drops below

5% of the set point.

Battery DC Over Voltage

(Alarm 68)

Continuous Alarm

Battery voltage levels have

exceeded the maximum

allowable limits.

The UPS turns off the charger until the next

power recycle. Contact your service

representative.

Charger Failure

(Alarm 34)

Continuous Alarm

A battery charger fault has been

detected.

The UPS turns off the charger until the next

power recycle. Contact your service

representative.

Inverter AC Over Voltage

(Alarm 0)

Continuous Alarm

The UPS has detected

abnormally high inverter

voltage levels.

The UPS transfers to Bypass mode if

supporting the load.

Inverter AC Under Voltage

(Alarm 1)

Continuous Alarm

The UPS has detected

abnormally low inverter voltage

levels.

The UPS transfers to Bypass mode if

supporting the load.

Rectifier Input Over Current

(Alarm 26)

Continuous Alarm

The UPS has detected that

rectifier input current limits

have been exceeded.

The UPS transfers to Bypass mode if

supporting the load.

Inverter Output Over

Current

(Alarm 27)

Continuous Alarm

The UPS has detected that the

inverter output current limits

have been exceeded.

The UPS transfers to Bypass mode if

supporting the load.

71

Troubleshooting |

Table 15. Typical Alarms and Conditions (continued)

Alarm or Condition ActionPossible Cause

DC Link Over Voltage

(Alarm 28)

Continuous Alarm

The link or rail voltage has

exceeded its upper threshold

limit.

The UPS transfers to Bypass mode if

supporting the load.

DC Link Under Voltage

(Alarm 29)

Continuous Alarm

The link or rail voltage has

dropped below its lower

threshold limit.

The UPS transfers to Bypass mode if

supporting the load.

Rectifier Fault

(Alarm 30)

Continuous Alarm

The UPS has detected a fault in

the rectifier circuit while

attempting recovery from

Bypass mode or Converter

mode.

Contact your service representative.

Inverter Fault

(Alarm 31)

Continuous Alarm

The UPS has detected a fault in

the inverter circuit while

attempting a recovery from

Bypass mode or Converter

mode.

Contact your service representative.

Fatal EEPROM Fault

(Alarm 53)

Continuous Alarm

There is EEPROM data

corruption due to a failed

device or incorrect flash

upgrade.

Contact your service representative.

Output Short Circuit

(Alarm 58)

Continuous Alarm

The UPS has detected an

abnormally low impedance

placed on its output and

considers it a short circuit.

If the UPS is in Normal mode, the UPS

transfers to Bypass mode if available,

otherwise, the UPS shuts down after five line

cycles.

If the UPS is in Battery mode, the UPS shuts

down after five line cycles.

Fan Failure

(Alarm 193)

Continuous Alarm

The UPS has detected that one

or more fans are not

functioning properly.

This is an alarm only. Contact your service

representative immediately and remove the

load.

Silencing the Alarm

Press any button on the control panel to silence the alarm. Check the alarm condition and perform the

applicable action to resolve the condition. If any new alarm becomes active, the audible alarm resumes,

overriding the previously silenced alarm.