Dell H952N, 4200W, J730N, J739N, K804N User Manual

Dellt Online Rack UPS

3750W and 4200W

User's Guide

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

K804N, H952N, J730N, K805N

J739N

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:

S This 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

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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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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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1

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

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Introduction

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

S Online 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.

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

independence, and generator compatibility.

S Selectable High Efficiency mode of operation.

S 4U size that fits any standard 48 cm (19”) rack.

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

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

UPS.

S Extended runtime with an optional External Battery Module (EBM).

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

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

S Optional Dell Network Management Card with enhanced communication capabilities for

increased power protection and control.

S Advanced power management with the Dell UPS Management Software for graceful shutdowns

and power monitoring.

S Sequential shutdown and load management through separate receptacle groups called load

segments.

S Firmware that is easily upgradable without a service call.

S Backed by worldwide agency approvals.

Introduction

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7

Finding Information

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

regulatory information.

What are You Looking For?

S The user's guide for my UPS

S The user's guide for the Dell Network Management

Card

S Dell UPS Management Software

Find It Here

Dell UPS Disc

NOTE: Documentation and software updates can be

found at

S Specifications

S How to configure UPS settings

S How to troubleshoot and solve problems

S How to install REPO control

S Safety instructions

S Regulatory information

S Recycling information

S Warranty information

S Terms and Conditions (U.S. only)

S End User License Agreement

S Support information Dell Support Website — support.dell.com

Dell UPS User's Guide

The user's guide is available on the Dell UPS disc and
on support.dell.com.

Safety, Environmental, and Regulatory Information

Dell Warranty and Support Information

support.dell.com.

NOTE: Select your region or business segment to view

the appropriate support site.

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Introduction

2

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:

avoided, will result in death or serious injury:

S This 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:

avoided, could result in death or injury:

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

installation. Risk of electrical shock.

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

provided by others.

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

circuit(s) are to be provided by others.

S Output overcurrent protection and disconnect switch must be provided by others.

S This 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.

S Do 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.

S To 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
ANSI/NFPA 70 or your local electrical code:

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

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

®

(NEC®),

UPS Output Power 208V 230V

3750W 30A 25A

4200W 30A 30A

Safety Warnings

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9

S To 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).

S 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).

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

transporting (see page 58).

CAUTION:

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

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

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

be easily accessible.

S Servicing of batteries should be performed or supervised by personnel knowledgeable about

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

S Batteries 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.

S Determine 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).

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

Attempting to alter wiring can cause injury.

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

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

S Never dispose of batteries in a fire. Batteries may explode when exposed to flame.

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

eyes and may be extremely toxic.

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

10

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Safety Warnings

WARNING: Additional instructions for Rack-Mounted Systems

S Your 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.

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

stabilizers can allow the rack to tip over.

S Always load from the bottom up, and load the heaviest items first.

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

S Do 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.

Safety Warnings

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3

Installation

This chapter explains:

S Equipment inspection

S Unpacking the cabinet

S UPS rear panels

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

S Remote Emergency Power-off (REPO) installation

S Initial 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.

12

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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:

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

Figure 2. Unpacking the Cabinet

Installation

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2 With 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

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

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Installation

Identifying the UPS Rear Panels

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

Two IEC 320-C19 and Two L6-20 Receptacles

(Load Segment 2)

Output Circuit Breaker

Ground Screw

2m, L6-30P Power Cord

Figure 4. 3750W, 208V Rear Panel

RS-232 Port

USB Port

One L6-30 Receptacle
(Load Segment 1)

UPS
Communication Bay

REPO Ports

EBM Connector

Installation

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15

Two IEC 320-C19 Receptacles

(Load Segment 2)

Output Circuit Breaker

USB Port

RS-232 Port

UPS
Communication Bay

REPO Ports

Ground Screw

Input Terminal Block

Figure 5. 3750W, 230V Rear Panel

One L6-30 Receptacles

(Load Segment 2)

Output Circuit Breaker

Input Terminal Block

Four IEC 320-C19 and
Two L6-20 Receptacles

(Load Segment 1)

Eight IEC 320-C13 Receptacles
(Load Segment 1)

RS-232 Port

USB Port

Ground Screw

EBM Connector

UPS
Communication Bay

REPO Ports

EBM Connector

Figure 6. 4200W, 208V Rear Panel

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Installation

Four IEC 320-C19 Receptacles

Output Circuit Breaker

(Load Segment 1)

USB Port

RS-232 Port

UPS
Communication Bay

REPO Ports

Input Terminal Block

Six IEC 320-C13 Receptacles
(Load Segment 2)

Figure 7. 4200W, 230V Rear Panel

Identifying the UPS Front Panel

On/Off Button

Scroll Button (Up or Back)

LCD Panel

Scroll Button (Down or Forward)

Select Button

Ground Screw

EBM Connector

Figure 8. The Dell Online Rack UPS Front Panel

Installation

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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:

1 Remove 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

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Installation

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

Figure 10. Removing the Battery Trays

2 If 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.

3 Select 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.

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

Installation

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5 Attach 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

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Installation

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

Figure 12. Installing the Cabinet

7 Secure 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

Installation

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

Figure 14. Installing the Battery Trays

22

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Installation

9 Replace 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

Installation

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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:

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

Figure 17. EBM Installation

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Installation

Installing the UPS

To install the UPS:

1 If 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.

2 If 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.

3 If 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.

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

protected equipment.

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

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

NOTE:

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:

separated from any hazardous voltage circuits by reinforced insulation.

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

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.

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Installation

25

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

L2

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

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:

1 Verify that the UPS is off and unplugged.

2 Remove 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.

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

4 Optional. 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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26

Installation

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

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

0.75 mm

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.”

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

output receptacles.

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

continue to “UPS Initial Startup” on page 29.

2

–0.5 mm2 (18–20 AWG) wire.

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:

S 250V/30A, 2-pole circuit breaker (25A for 3750W/230V UPS models) to provide short circuit and

overcurrent protection

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

load (see Figure 19)

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

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

least 3 mm

S 200–240 Vac

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

S 50/60 Hz

S Flexible metal conduit (recommended for ease of service and maintenance)

Installation

|

27

Wall

2-pole

Breaker

Line

AC Mains

Neutral

Figure 19. Circuit Breaker Diagram

UPS

To hardwire the UPS input:

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

sure there is no power.

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

Figure 20. Removing the Terminal Block Cover

3 Punch 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.

4 Pull 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.

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28

Installation

5 Insert 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.

6 Connect 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

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

1 Input Ground

2 L2/Neutral In

3 L1 In

5.26–16 mm
(10–6 AWG)

2

7 Replace the terminal block cover.

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

UPS Initial Startup

To start up the UPS:

1 Verify that the internal batteries are connected.

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

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

2.26 Nm (20 lb in)

Installation

|

29

4 For 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

5 For 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

6 Press 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).

7 On 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.

8 Verify 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).

9 If 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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30

Installation

Operation

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

S UPS startup and shutdown

S Control panel and display functions

S Retrieving the Event Log

S Transferring the UPS between modes

S Setting power strategy

S Behavior on overload

S Configuring 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

4

Starting the UPS

To start the UPS:

1 Verify that the UPS power cord is plugged in.

2 Switch 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

3 Press 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).

.

Operation

|

31

4 On 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.

5 Verify 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:

1 Press 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.

2 Press 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:

1 Press 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.

2 Switch off utility power where the UPS is connected.

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

32

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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:

S Scroll up or back

S Select

S Scroll 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

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

Press for longer than one
second

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

Press both buttons for three
seconds

Press all three buttons for five
seconds

Return/exit back one menu layer without initiating a command
or changing a setting.

Save the setting being edited.

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.

Shortcut for defaulting the language back to English. The
buzzer emits a one second beep to indicate that the setting has
changed to English.

|

Operation

33

To select an option:

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

2 Press the button to select the option.

The current setting for the option flashes when selected.

3 Use the or buttons to toggle the available options.

4 Set 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
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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34

Operation

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

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:

S Status summary, including mode and load

S Notice or alarm status, if any are present

S Battery 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:

S Normal mode

S High-efficiency mode

S Battery mode

S Bypass mode

S Standby mode

|

Operation

35

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.

36

|

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.

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.

|

Operation

37

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

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.

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

Description

(This is part of the normal charging cycle.)

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.

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38

Operation

Measurements

The measurements screens provide useful measurement information on:

S Output watts VA, current, power factor, voltage, and frequency

S Input voltage and frequency

S Battery voltage and percentage charged

S Instantaneous Headroom Watts remaining

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

includes the date and timestamp of the peak demand)

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

of the peak demand)

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

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

was last reset)

Operation

|

39

Control Screens

Table 5 describes the available control screens.

Table 5. Control Screens

Control Screens

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

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

Reset Error State Reset Alarms: yes | no

Load Segments Load segment 1: on | off

Restore Factory Settings Restore Factory Settings: yes | no

Description

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.

Starts a manual battery test.

See “Testing Batteries” on page 61.

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 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.

Available only in Standby mode.

Restoring the factory settings:

S Returns all user-configurable EEPROM settings to default factory settings

S Resets all pending on/off commands

S Clears the Event Log and resets all time stamps

S Resets the battery test status

S Initiates the Self Diagnostics test

40

|

Operation

Identification

The identification screens display the following UPS information:

S Type and model

S Part number

S Serial number

S UPS firmware

S Network Management Card (NMC) firmware

NOTE:

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

on page 56.

Operation

|

41

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

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

User Password [Enabled] [Disabled]

Audible Alarms [Enabled] [Disabled]

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

Control Commands from Serial
Port

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

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

Available Settings Default Setting

English
[Simplified Chinese] [Russian] [Korean]
[Traditional Chinese]

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.

Enabled

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.

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.

[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.

[Auto-sensing]

01/01/2009

12:00:00

Enabled

Auto-sensing

42

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Operation

Table 6. Settings (continued)

Description Default SettingAvailable Settings

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

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.

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

High Efficiency

See “Setting Power Strategy” on page 47.

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

0s

See “Configuring Load Segments” on page 49.

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

Off

See “Configuring Load Segments” on page 49.

Start on Battery [Enabled] [Disabled]

NOTE: Battery start is disabled from the factory and

Enabled

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.

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

Disabled

The UPS output is turned off in five minutes if the
UPS is on battery and output power is below the
selected level.

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

0s

The UPS issues a “UPS on battery” notice in the
specified number of seconds after the UPS starts to
discharge the batteries.

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

voltage models;

Disabled for all other

models

Operation

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43

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.

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.

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

If Always, Bypass operation is allowed when:

S Bypass voltages > the value set for Bypass

Voltage Low Limit

S Bypass voltages < the value set for Bypass

Voltage High Limit

S Bypass frequency > (nominal frequency -3 Hz)

S Bypass frequency < (nominal frequency +3 Hz)

S Inverter 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.

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.

-15% of nominal

+10% of nominal

Always

±3.0 Hz

44

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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.

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

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

Charger [Enabled] [Disabled]

If Enabled, batteries charge normally.

If Disabled, the battery charger is off.

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.

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.

Automatic Battery Tests [Enabled] [Disabled]

See “Running Automatic Battery Tests” on page 53.

Enabled

0

Enabled

0 %

3 min

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.

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

No

Operation

|

45

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.

Clear Event Log

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

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.

[+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.

Transferring the UPS Between Modes

Transferring between modes includes:

S Transferring from Normal to Bypass mode

S Transferring from Bypass to Normal mode

No

—

[+0]

Transferring from Normal to Bypass Mode

To transfer from Normal to Bypass mode:

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

Control menu using the

2 Press the button to enter the Control menu.

3 Select Go to Bypass.

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

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46

Operation

button.

Transferring from Bypass to Normal Mode

To transfer from Bypass to Normal mode:

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

Control menu using the

2 Press the button to enter the Control menu.

3 Select Go to Normal.

button.

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:

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

Settings menu using the

2 Press the button to enter the Settings menu.

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

The current setting for the option flashes when selected.

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

The default is High Efficiency.

button.

5 Press the button to confirm.

Operation

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47

Retrieving the Event Log

To retrieve the Event Log through the display:

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

Event Log menu using the

button.

2 Press the button to enter the Event Log list.

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

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

5 Press 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

Level 1 Load 100% to

Level 2 Load 102% to

Level 3 Load > 110% Transfer to Bypass immediately

Load Level On Utility Power

Overload alarm only and

101%

110%

support load indefinitely

Transfer to Bypass after
12 seconds (±1 sec)

If Bypass is not available,
transfer to Fault mode after
12 seconds (±1 sec)

If Bypass is not available,
transfer to Fault mode in
300 ms to 1 sec

On Bypass/High
Efficiency Mode

Overload alarm only
and support load
indefinitely

Transfer to Fault mode
in 2 minutes (±1 sec)

Transfer to Fault mode
in 300 ms to 1 sec

On Battery

Overload alarm only,
support load until low
battery shutdown level
is reached

Transfer to Fault mode
after 12 seconds
(±1 sec) or until low
battery shutdown level
is reached

Transfer to Fault mode
in 300 ms to 1 sec

48

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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:

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

Control menu using the

2 Press the button to enter the Control menu.

3 Use the button to scroll to Load Segments.

4 Press the button.

The current setting for the option flashes when selected.

button.

5 Select the desired load segment using the and buttons.

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

7 Press the button to confirm.

8 Set the other load segment if applicable.

Operation

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49

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:

S The button

S An external command with auto-restart option

S Battery under voltage state

S Automatic 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:

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

Settings menu using the

2 Press the button to enter the Settings menu.

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

button.

The current setting for the option flashes when selected.

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

5 Press the button to confirm.

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

7 Press 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.

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50

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:

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

Settings menu using the

2 Press the button to enter the Settings menu.

3 Use 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.

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

5 Press the button to confirm.

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

7 Press the button to confirm.

button.

Operation

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51

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:

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

Settings menu using the

2 Press the button to enter the Settings menu.

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

The battery number value begins to flash.

4 Set the battery number value using the and buttons.

button.

Configuration

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.

5 Press the button to confirm.

Setting

52

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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:

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

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

S The batteries must be fully charged.

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

S The load must be higher than 10%.

Configuring Automatic Battery Tests

To configure the automatic battery tests:

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

Settings menu using the

2 Press the button to enter the Settings menu.

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

button.

The option begins to flash.

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

5 Press 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.

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Operation

53

5

Additional UPS Features

This chapter describes:

S Communication ports (RS-232 and USB)

S Dell Network Management Card

S Dell 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.

879

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

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54

Additional UPS Features

3

16245

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.

Additional UPS Features

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55

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.

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

2 Insert the communication card into the slot.

3 Secure 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.

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56

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.

Additional UPS Features

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57

6

UPS Maintenance

This chapter explains how to:

S Care for the UPS and batteries

S Transport the UPS

S Store the UPS and batteries

S Test the batteries

S Update 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:

1 Verify that the UPS is off and unplugged.

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

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58

UPS Maintenance

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

Figure 26. Removing the UPS Front Cover

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

Figure 27. Disconnecting the Internal Battery Connector

UPS Maintenance

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59

5 Replace 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.

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60

UPS Maintenance

Testing Batteries

For a battery test to run:

S The batteries must be fully charged.

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

S The load must be higher than 10%.

To test batteries:

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

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

Control menu using the

3 Press the button to enter the Control menu.

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

5 Press 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.

button.

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.

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UPS Maintenance

61

Specifications

This chapter provides the following specifications:

S Model list

S Dimensions and weights

S Electrical input and output

S Environmental and safety

S Battery

S UPS block diagram

Table 9. UPS Model List

208V Model 230V Models

UPS Models 3750R OL (K804N), 3750W

4700R OL (J730N), 4200W

7

3750R OL (H952N), 3750W

4200R OL (K805N), 4200W

External Battery Module
(EBM)

Table 10. Dimensions and Weights

UPS Dimensions
(W H D)

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

438.0 171.5 801.4 mm

(17.2” 6.8” 31.5”) - 4U

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

UPS Models EBM Model

438.0 127.0 735.0 mm

(17.2” 5.0” 29.0”) - 3U

62

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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

3750W: Hardwired

4200W: Hardwired

4200W: Hardwired

Table 12. Electrical Output

208V Models 230V Models

Power Levels
(rated at nominal inputs)

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%

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

-6% to +6% of nominal voltage

Voltage Waveform Sine wave

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

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

(1) L6-30R, 30A

(2) IEC 320-C19, 20A

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

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

(1) L6-30R, 30A

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

(4) IEC 320-C19, 20A

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

3750W

4200W

15A for UL

20A for UL

15A for UL

20A for UL

Specifications

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63

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

-15°C to 60°C (5°F to 140°F)

Temperature

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

64

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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.

Input
Filter

Charger

Figure 29. Online UPS Block Diagram

Bypass

AC/DC

Boost

DC/DC

Battery

DC/AC

Inverter

Output

Filter

Specifications

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65

8

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:

S UPS Status menu: access to all active alarms

S Event 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:

S Status 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.

S Notice 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.”

S Battery 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:

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

2 Press the button to access the UPS Status menu.

3 Press 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).

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

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

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66

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.

S Notices, 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.

S Alarms, 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:

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

Event Log menu using the

button.

2 Click the button to enter the Event Log list.

3 Scroll 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

The UPS does not provide or
indicate the expected backup
time.

Power is not available at the
UPS output receptacles.

The UPS does not start.
(The LCD is off.)

The UPS operates normally,
but some or all of the
protected equipment is not
on.

Possible Cause Action

The batteries need charging or
service.

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

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

The equipment is not
connected correctly to the UPS.

Apply utility power for 48 hours to charge the
batteries. If the condition persists, contact
your service representative.

pressing the On/Off button until the front
panel displays the UPS status summary screen.

that the battery is plugged in.

Verify that the equipment is plugged into the
UPS receptacles. Also verify that the load
segment is on.

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Troubleshooting

67

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.

The UPS does not transfer to
Bypass mode.

The bypass utility does not
qualify.

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

UPS on Bypass

(Notice 169)

The UPS is operating from
Bypass mode.

Continuous Alarm

On Manual Bypass

(Notice 143)

Intermittent Alarm

UPS on Battery

(Notice 168)

UPS was manually commanded
to transfer to Bypass mode and
will remain in bypass until
commanded.

A utility failure has occurred
and the UPS is in Battery mode.

Intermittent Alarm

Battery Disconnected

(Alarm 199)

Continuous Alarm

The UPS does not recognize the
internal batteries.

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.

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.

Resolve the condition, then restart the test.

Check the bypass utility. The UPS is receiving
bypass utility power that may be unstable or in
brownout conditions.

correctly. See “Settings” on page 42.

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.

None.

The UPS is powering the equipment with
battery power. Prepare your equipment for
shutdown.

If the condition persists, contact your service
representative.

Verify that all batteries are properly connected.
If the condition persists, contact your service
representative.

This warning is approximate. The actual time to
shutdown may vary depending on the UPS load
and presence of an External Battery Module
(EBM).

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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.

Battery Test Failed

(Alarm 191)

Intermittent Alarm

Service Battery

(Alarm 149)

Continuous Alarm

Utility Not Present

(Alarm 59)

Intermittent Alarm

Bypass Not Available

(Alarm 105)

Input AC Over Voltage

(Alarm 6)

A weak battery string was
detected during the last battery
test.

A faulted battery string has
been detected and as a result,
the charger is disabled.

Utility level has fallen below the
Utility Not Present threshold
(typically <25 to 50V).

Utility is outside of the bypass
limits defined in the UPS.

Utility voltage exceeds the
maximum operating range.

Intermittent Alarm

Input AC Under Voltage

(Alarm 7)

Utility voltage is below the
minimum operating range.

Intermittent Alarm

Input Under/Over Frequency

(Alarm 8)

The utility frequency is out of
usable frequency range.

Intermittent Alarm

Site Wiring Problem

(Alarm 194)

Continuous Alarm

Remote Emergency Power
Off

(Alarm 12)

Continuous Alarm

An alarm triggers when the
difference between ground and
neutral voltage is >15V.

The external contacts in the
rear of the UPS are configured
for REPO operation and they
have been activated.

The alarm is issued when the battery time
remaining reaches zero. All connected devices
should have already shut down gracefully.

This is a warning notice. Dell recommends
that you replace the batteries soon.

Contact your service representative.

Transfer to battery if supporting load. Power
down if not supporting load.

Check the bypass settings. See “Settings” on
page 42.

The UPS transfers to Battery mode if
supporting load.

The UPS transfers to Battery mode if
supporting load.

The UPS transfers to Battery mode if
supporting load.

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).

The UPS de-energizes the load and enters
Standby mode. See “Installing Remote
Emergency Power-off” on page 25 for more
information.

Troubleshooting

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69

Table 15. Typical Alarms and Conditions (continued)

Alarm or Condition ActionPossible Cause

Output Overload

(Alarm 25)

Continuous Alarm

Output Overload Level 2

(Alarm 159)

The load level is at or has
exceeded the configurable
threshold limit for a Level 1
Overload condition.

The load level is >101% and
<110% of the UPS rating.

Continuous Alarm

Output Overload Level 3

(Alarm 162)

The load is >110% of the UPS
rating.

Continuous Alarm

Battery DC Over Voltage

(Alarm 68)

Continuous Alarm

Charger Failure

(Alarm 34)

Battery voltage levels have
exceeded the maximum
allowable limits.

A battery charger fault has been
detected.

Continuous Alarm

Inverter AC Over Voltage

(Alarm 0)

Continuous Alarm

Inverter AC Under Voltage

(Alarm 1)

Continuous Alarm

Rectifier Input Over Current

(Alarm 26)

Continuous Alarm

Inverter Output Over
Current

(Alarm 27)

The UPS has detected
abnormally high inverter
voltage levels.

The UPS has detected
abnormally low inverter voltage
levels.

The UPS has detected that
rectifier input current limits
have been exceeded.

The UPS has detected that the
inverter output current limits
have been exceeded.

Continuous Alarm

The UPS can support the load indefinitely at
this load level.

The alarm clears when the load drops below
5% of the set point.

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.

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.

The UPS turns off the charger until the next
power recycle. Contact your service
representative.

The UPS turns off the charger until the next
power recycle. Contact your service
representative.

The UPS transfers to Bypass mode if
supporting the load.

The UPS transfers to Bypass mode if
supporting the load.

The UPS transfers to Bypass mode if
supporting the load.

The UPS transfers to Bypass mode if
supporting the load.

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Troubleshooting

Table 15. Typical Alarms and Conditions (continued)

Alarm or Condition ActionPossible Cause

DC Link Over Voltage

(Alarm 28)

Continuous Alarm

DC Link Under Voltage

(Alarm 29)

Continuous Alarm

Rectifier Fault

(Alarm 30)

Continuous Alarm

Inverter Fault

(Alarm 31)

Continuous Alarm

Fatal EEPROM Fault

(Alarm 53)

Continuous Alarm

Output Short Circuit

(Alarm 58)

Continuous Alarm

Fan Failure

(Alarm 193)

Continuous Alarm

The link or rail voltage has
exceeded its upper threshold
limit.

The link or rail voltage has
dropped below its lower
threshold limit.

The UPS has detected a fault in
the rectifier circuit while
attempting recovery from
Bypass mode or Converter
mode.

The UPS has detected a fault in
the inverter circuit while
attempting a recovery from
Bypass mode or Converter
mode.

There is EEPROM data
corruption due to a failed
device or incorrect flash
upgrade.

The UPS has detected an
abnormally low impedance
placed on its output and
considers it a short circuit.

The UPS has detected that one
or more fans are not
functioning properly.

The UPS transfers to Bypass mode if
supporting the load.

The UPS transfers to Bypass mode if
supporting the load.

Contact your service representative.

Contact your service representative.

Contact your service representative.

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.

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.

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Troubleshooting

71