Dellt Online Rack UPS 5600W User's Guide Dell 5600R OL HV-US, Dell 5600R OL HV K812N www.dell.com | support.dell.
Notes and Warnings NOTE: A NOTE indicates important information that helps you make better use of your product. CAUTION: A CAUTION indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury or in property damage incidents. WARNING: A WARNING indicates a potentially hazardous situation which, if not avoided, could result in death or injury.
Table of Contents 1 Introduction Finding Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Safety Warnings 3 Installation 8 Inspecting the Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Unpacking the Cabinet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 UPS Rear Panels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Screen Locked . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 UPS Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 Event Log . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 Control Screens . . . . . . . . . . . . . . . . . . . . . . .
Storing the UPS and Batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59 When to Replace Batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59 Testing Batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60 Updating the UPS Firmware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Introduction 1 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.
Providing outstanding performance and reliability, the UPS's unique benefits include: S Online UPS design with pure sine wave output. S True online double-conversion technology with high power density, utility frequency independence, and generator compatibility. S Buck and Boost voltage regulation that ensures regulated voltage to your load by correcting voltage fluctuations. S The UPS filters and regulates incoming AC power and provides consistent power to your equipment without draining the battery.
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 Find It Here Dell UPS Disc S The user's guide for the Dell Network Management Card S Dell UPS Management Software NOTE: Documentation and software updates can be found at support.dell.com.
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.
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: 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.
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.
Installation 3 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.
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.
CAUTION: The cabinet is heavy (see page 62). Lifting the cabinets into the rack requires a minimum of two people. 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.
UPS Rear Panels This section shows the rear panels of the Dell Online Rack models. Two NEMA L6-30R Receptacles (Load Segment 2) REPO Ports Output Circuit Breaker EBM Connector Two Output Circuit Breakers UPS Communication RS-232 Bay Port Input Terminal Block Ground Screw USB Port Four IEC 320-C19 Receptacles (Load Segment 1) Figure 4.
UPS Front Panel This section shows the front panel of the Dell Online Rack UPS. On/Off Button LCD Panel Scroll Button (Up or Back) Scroll Button (Down or Forward) Select Button Figure 6.
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.
Pull the battery trays out using the plastic tabs and remove the battery trays (see Figure 8). Figure 8. Removing the Battery Trays 2 If installing additional UPSs, repeat Step 1 for each cabinet. NOTE: The following 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.
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 9). Pull the rail just past the front of the rack. Push the front end of the rail until it fully seats on the vertical rack flange and the hook latch locks in place. Figure 9.
6 Slide the cabinet into the rack (see Figure 10). Repeat Steps 3 through 5 for any additional cabinets. Figure 10. Installing the Cabinet 7 Secure the front of the cabinet to the rack using the four thumbscrews on the mounting brackets (see Figure 11). Tighten by hand; do not use power tools. Repeat for any additional cabinets. Figure 11.
8 Install the UPS battery trays (see Figure 12). Figure 12.
9 Replace the battery retaining bracket (see Figure 13). 10 Tighten the thumbscrew. 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 each internal battery connectors and attach to the battery retaining bracket between the studs. Figure 13.
12 Snap the UPS front cover into place (see Figure 14). Figure 14.
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 15). Figure 15.
5 Make 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.
Remove Jumper if Installed Figure 16. REPO Connector To install the REPO switch: 1 Verify that the UPS is off and disconnected from utility power. 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. See Figure 16. 3 Connect the REPO connector to the REPO port labeled “IN” on the UPS rear panel.
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.” 7 Verify that the externally-connected REPO switch is not activated to enable power to the UPS output receptacles. 8 For hardwired models, continue to the following section, “Hardwiring the UPS Input.” Otherwise, continue to “UPS Initial Startup” on page 31.
Wall 2-Pole Breaker Line AC Mains UPS Neutral/L2 Figure 17. Circuit Breaker Diagram 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 18. 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.
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. CAUTION: If the UPS does not have an automatic protection device against current backfeed, Dell recommends installing an external isolating device (see Figure 19). After the device is installed, you must add a warning label with the following wording or the equivalent on the external AC contactor: RISK OF VOLTAGE BACKFEED.
6 Connect the input and ground wires to the terminal block according to Figure 20 and Table 2. Terminal Position 1 2 3 Figure 20. UPS Input Terminal Block Table 2. UPS Wiring Specifications Wire Function Input Terminal Position UPS Wire Function 1 Input Ground 2 L2/Neutral In 3 L1 In Terminal Wire Size Rating* Tightening Torque 5.26–16 mm2 (10–6 AWG) 2.
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. 4 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 . 5 Press the button on the UPS front panel.
Operation 4 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 Behavior on overload S Configuring load segments, battery settings, and automatic restart UPS Startup and Shutdown To start up or shut down the UPS, see: S “Starting the UPS” on page 32 S “Starting the UPS on Battery” on page 33 S “UPS Shutdown” on page 33 Starting the UPS To start the UPS: 1
4 On the control panel, 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.
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 21. Figure 21.
To select an option: 1 When scrolling through the settings, the present setting displays for each selection. 2 Press and release the button to select the option. The current setting for the option flashes when selected. 3 Use the 4 Set the new option by pressing the or buttons to toggle the available options. button again for longer than one second. The option stops flashing. Changing the Language Language selection is controlled through the user settings.
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 22. Pushing any button returns the normal button function, unlocks the screen, and removes the lock symbol. Figure 22. A Locked Screen Only screens that have dynamic, real-time data updates can be locked.
Table 4. Status Summary Screens Status Summary Screen Description UPS Critical Failure The UPS is in Fault mode. The status icon and background of the icon 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 utility power returns, the UPS transfers to Normal mode operation while the battery recharges.
Table 4. Status Summary Screens (continued) Status Summary Screen Description Battery Test Status 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. Standby Mode When the UPS is turned off and remains connected to utility power, the UPS is in Standby mode and utility power supplies the connected equipment.
Table 5. 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 charger is off.
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)
Control Screens Table 6 describes the available control screens. Table 6. 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.
Identification The identification screens display the following UPS information: S Type and model S Part number S Serial number S UPS firmware S Comm firmware S Network Management Card firmware NOTE: The NMC firmware screen displays only if the Network Management Card is installed. See “Dell Network Management Card“ on page 56. Settings Only available options are displayed. User settings are not protected by default. You can enable the password through the User Password setting.
Table 7. Settings (continued) Description Available Settings Set Date and Time Set Month, Day, Year, Hours, Minutes, and Seconds Default Setting Date: mm/dd/yyyy 01/01/2009 Time: hh:mm:ss 12:00:00 NOTE: The date format is dependent on the language selection. NOTE: Time is a 24-hour clock. Control Commands from Serial Port [Enabled] [Disabled] Enabled If Enabled, control commands are accepted through the serial port, USB ports, or option card.
Table 7. Settings (continued) Description Available Settings Default Setting 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 [0s] [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.
Table 7. Settings (continued) Description Available Settings Default Setting Synchronization Window [Sync Disabled] [±0.5 Hz] [±1.0 Hz] [±1.5 Hz] [±2.0 Hz] [±2.5 Hz] [±3.0 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.
Table 7. Settings (continued) Description Available Settings Default Setting Reset Peak Consumption Watts [No] [Yes] No 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] No 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.
Transferring the UPS Between Modes Transferring between modes includes: S Transferring from Normal to Bypass mode S Transferring from Bypass to Normal mode Transferring from Normal to Bypass Mode To transfer from Normal to Bypass mode: 1 Press the button for longer than one second to go to the main menu selection and scroll down to the Control menu using the button. 2 Press the 3 Select Go to Bypass. button to enter the Control menu. The text on the screen changes to Manual Bypass Command Sent.
Behavior on Overload See Table 8 for an explanation of how the UPS responds to an overload condition. Table 8. Behavior on Overload On Bypass Overload Severity Load Level On Utility Power Level 1 100% to 101% Overload alarm and supports load indefinitely Overload alarm and supports load indefinitely Level 2 102% to 110% Transfers to Bypass mode in 12 sec (±1 sec). If Bypass mode is not available, transfers to Fault mode after 12 sec (±1 sec).
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.
Configuring Automatic Start Delay You can configure a 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.
Configuring Automatic on Battery Shutdown If set to Off (default), the load segment turns off only when commanded manually by the an external command, or through the display (Control > Load Segments). button, If set to zero seconds (0s), the load segment turns off automatically when the UPS on Battery state activates.
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.
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.
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 “UPS Rear Panels” on page 15 for the communication port locations.
Table 9. RS-232 Communication Port Pin Assignment Pin Signal Name 1 Function Direction from the UPS Unused — 2 Tx Transmit to external device Out 3 Rx Receive from external device In Unused — Signal common (tied to chassis) — 6 Unused — 7 Unused — 8 Unused — 9 Unused — 4 5 GND NOTE: Unused pins must be left free on all models.
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 24 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 the retained screws. Figure 24.
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.
UPS Maintenance 6 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).
3 Remove the UPS front cover (see Figure 25). Figure 25. Removing the UPS Front Cover 4 Disconnect the internal battery connectors (see Figure 26). Figure 26.
5 Replace the UPS front cover (see Figure 27). Figure 27. 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 connecting the UPS to utility power. 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.
Testing Batteries For a battery test to run: S The batteries must be fully charged. S The UPS must be in Normal mode with no active alarms. S The load must be higher than 10%. To test batteries: 1 Connect the UPS to utility power 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 button. 3 Press the 4 Use the 5 Press the button to enter the Control menu.
7 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 10. UPS Model List UPS Models 208V Model 230V Models Dell 5600R OL HV-US, 5600W Dell 5600R OL HV, 5600W 5600R EBM (K812N), 216 Vdc/30A External Battery Module (EBM) Table 11. Dimensions and Weights UPS Dimensions (W H D) Rack Unit Size Weights UPS Models EBM Model 438.0 171.5 801.4 mm (17.2” 6.
Table 13. Electrical Output Power Levels (Rated at Nominal Inputs) Regulation (Normal Mode) 208V Models 230V Models 5600W 5600W -6% to +6% of nominal voltage NOTE: Varies based on auto-detected input voltage or customer settings. Regulation (Battery Mode), Nominal Voltage ±5% -6% to +6% of nominal voltage NOTE: Varies based on auto-detected input voltage or customer settings.
Table 14.
Table 15. Battery Configuration 5600W: (18) 216V, 7.2 Ah internal batteries; EBM (18) 216V, 9.0 Ah Battery Type CSB GP1272 7.2 Ah, YUASA NP7-12 7Ah, YUASA NPW 45-12 9.
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.
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, notices, and alarms are logged in the Event Log when they occur and, if applicable, when they were cleared as follows: S 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. S Notices, including active notices, are recorded in the Event Log.
Table 16. Typical Alarms and Conditions (continued) Alarm or Condition Possible Cause Action 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.
Table 16. Typical Alarms and Conditions (continued) Alarm or Condition Possible Cause Action Battery Test Failed A weak battery string was detected during the last battery test. This is a warning notice. Dell recommends that you replace the batteries soon. A faulted battery string has been detected and as a result, the charger is disabled. Contact your service representative. The utility level has fallen below the Utility Not Present threshold (typically <25 to 50V).
Table 16. Typical Alarms and Conditions (continued) Alarm or Condition Possible Cause Action Output Overload Level 2 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. (Alarm 159) Continuous Alarm Output Overload Level 3 (Alarm 162) The alarm clears when the load drops below 5% of the set point. The load is >110% of the UPS rating.
Table 16. Typical Alarms and Conditions (continued) Alarm or Condition Possible Cause Action Bypass AC Under Voltage The measured voltage on Bypass is less than the upper voltage limit specification for bypass operation. A notification alarm is generated and the notice is logged. (Notice 4) Intermittent Alarm Only apply this setting when Qualify Bypass is set to Always and utility is present, but below the bypass undervoltage range. Do not apply this setting if a Utility Not Present alarm is active.
Table 16. Typical Alarms and Conditions (continued) Alarm or Condition Possible Cause Action Inverter Fault The UPS has detected a fault in the inverter circuit while attempting a recovery from Bypass mode or Converter mode. Contact your service representative. The UPS has detected that one of its heat sinks has exceeded the maximum defined operating temperature. Possible fan failure. The UPS transfers to Bypass mode if available.