Dell K812N User Manual Download Page 15

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Installation

UPS Rear Panels

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

UPS
Communication
Bay

Input Terminal
Block

USB Port

Four IEC 320-C19 Receptacles
(Load Segment 1)

REPO
Ports

RS-232
Port

Two NEMA L6-30R Receptacles

(Load Segment 2)

EBM

Connector

Output Circuit Breaker

Ground
Screw

Two Output Circuit Breakers

Figure 4. 5600W, 208V Rear Panel

Six IEC 320-C13
Receptacles
(Load Segment 2)

REPO
Ports

Four IEC 320-C19 Receptacles

(Load Segment 1)

EBM

Connector

Two Output Circuit Breakers

UPS
Communication
Bay

USB Port

RS-232
Port

Input Terminal
Block

Ground
Screw

Output Circuit

Breaker

Figure 5. 5600W, 230V Rear Panel

Summary of Contents for K812N

Page 1: ...Dellt Online Rack UPS 5600W User s Guide Dell 5600R OL HV US Dell 5600R OL HV K812N w w w d e l l c o m s u p p o r t d e l l c o m ...

Page 2: ...l 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...

Page 3: ...s 14 UPS Front Panel 15 Rackmount Setup 16 Installing the EBM 23 Installing the UPS 23 Installing Remote Emergency Power off 24 Hardwiring the UPS Input 26 UPS Initial Startup 30 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 Display Functions 34 Startup Screen 34 ...

Page 4: ...ad Segments 48 Controlling Load Segments Through the Display 48 Configuring Automatic Start Delay 49 Configuring Automatic on Battery Shutdown 50 Configuring Battery Settings 51 Configuring the UPS for an EBM 51 Running Automatic Battery Tests 52 Configuring Automatic Battery Tests 52 Configuring Automatic Restart 52 5 Additional UPS Features RS 232 and USB Communication Ports 53 Dell Network Mana...

Page 5: ...ies 59 When to Replace Batteries 59 Testing Batteries 60 Updating the UPS Firmware 60 7 Specifications 8 Troubleshooting Accessing Alarms and Conditions 65 UPS Status Menu 65 Event Log Menu 66 Typical Alarms and Conditions 66 Silencing the Alarm 71 ...

Page 6: ...oblems 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 se...

Page 7: ...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 RS 232 serial port S Optiona...

Page 8: ... S Specifications S How to configure UPS settings S How to troubleshoot and solve problems S How to install REPO control Dell UPS User s Guide The user s guide is available on the Dell UPS disc and on support dell com S Safety instructions S Regulatory information S Recycling information Safety Environmental and Regulatory Information S Warranty information S Terms and Conditions U S only S End Us...

Page 9: ...azardous situation which if not 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 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 ...

Page 10: ...nce 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 r...

Page 11: ...C 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 ...

Page 12: ...nd 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 recha...

Page 13: ...ide 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 ...

Page 14: ...fully 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 ...

Page 15: ...o NEMA L6 30R Receptacles Load Segment 2 EBM Connector Output Circuit Breaker Ground Screw Two Output Circuit Breakers Figure 4 5600W 208V Rear Panel Six IEC 320 C13 Receptacles Load Segment 2 REPO Ports Four IEC 320 C19 Receptacles Load Segment 1 EBM Connector Two Output Circuit Breakers UPS Communication Bay USB Port RS 232 Port Input Terminal Block Ground Screw Output Circuit Breaker Figure 5 5...

Page 16: ...UPS Front Panel This section shows the front panel of the Dell Online Rack UPS On Off Button LCD Panel Scroll Button Down or Forward Select Button Scroll Button Up or Back Figure 6 The Dell Online Rack UPS Front Panel ...

Page 17: ...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 ...

Page 18: ...ng 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 Locate the rails at the bottom of the 4U space allocated for the UPS 3U for the EBM 4 Position the end of the left and right rails la...

Page 19: ...til 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 Installing the Rails ...

Page 20: ...ough 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 Securing the Cabinet ...

Page 21: ...21 Installation 8 Install the UPS battery trays see Figure 12 Figure 12 Installing the Battery Trays ...

Page 22: ...rcing 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 Replacing the Battery Retaining Bracket and Connecting the Internal Battery Connectors ...

Page 23: ...23 Installation 12 Snap the UPS front cover into place see Figure 14 Figure 14 Installing the UPS Front Cover ...

Page 24: ...t 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 UPS Rear Panels on page 15 for the location of the ground bonding screw for each model 3 If an emergency power off disconnect switc...

Page 25: ... from any hazardous voltage circuits by reinforced insulation CAUTION The REPO must not be connected to any utility connected circuits Reinforced insulation to the utility is required The REPO switch must have a minimum rating of 24 Vdc and 20 mA and be a dedicated latching type switch not tied into any other circuit The REPO signal must remain active for at least 250 ms for proper operation CAUTI...

Page 26: ...PO port labeled OUT on the first UPS must be connected to the left pin of the REPO port labeled IN on the second UPS S The right pin of the REPO port labeled OUT on the first UPS must be connected to the right pin of the REPO port labeled IN on the second UPS 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 th...

Page 27: ...orm the electrical installation Risk of electrical shock The Dell Online Rack hardwired models require a dedicated branch circuit that meets the following requirements S The protection device requires a two pole disconnection device between the UPS input and the mains see Figure 17 S The breaker must be wall mounted and be readily accessible to the operator S For Europe the breaker must meet the I...

Page 28: ...ly 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 4 Pull the input wire through the conduit leaving approximately 2 ft 0 5m of exposed wire Attach a flexible metal fitting to...

Page 29: ...AGE BACKFEED Isolate the UPS before operating on this circuit then check for hazardous voltage between all terminals External Distribution Panel UPS L L1 L L1 N L2 N L2 Legend Coil Remote Switch Magneto Thermal Input Main Switch AC Contactor see Table 1 Neutral L2 L1 Line Input B Q T N L2 L L1 B Q T Figure 19 Typical External Isolating Device Installation The following table lists AC contactors th...

Page 30: ...e Function Terminal Position UPS Wire Function Terminal Wire Size Rating Tightening Torque Input 1 Input Ground 5 26 16 mm2 10 6 AWG 2 49 Nm 22 lb in 2 L2 Neutral In 3 L1 In Use a minimum S 10 AWG for equipment grounding wire 75_C copper wire minimum S 8 AWG for input line and neutral wires 75_C copper wire minimum 7 Replace the terminal block cover 8 Continue to the following section UPS Initial ...

Page 31: ... the UPS status summary screen indicating that the UPS is operating normally and any loads are powered see Table 4 on page 37 8 If an optional EBM is installed see Configuring the UPS for an EBM on page 52 9 To change other factory set defaults see Operation on page 32 10 If you installed an optional REPO test the REPO function Activate the external REPO switch Verify the status change on the UPS ...

Page 32: ...e 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 Verify that the UPS is connected to utility power 2 Switch on utility power where the UPS is connected The UPS front panel display illuminates The Dell startup screen see Figure 21 on page 34 changes to the UPS status summary screen The UPS front panel display shows the Standby m...

Page 33: ...n 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 correcti...

Page 34: ...tion Press for less than one second Scroll back or up to the previous menu Press for longer than one second Return exit back one menu layer without initiating a command or changing a setting Press for less than one second Select the menu or option to be changed Press for longer than one second Save the setting being edited Press for less than one second Scroll forward or down to the next menu opti...

Page 35: ...splay 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 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 pressed ...

Page 36: ... summary screen measurement screens active alarms and the battery status screen UPS Status A UPS status summary screen replaces the startup screen after the UPS is powered on The UPS status summary screen displays until you press to go to the first of the main menu selections The UPS status provides separate screens for the following information S Status summary including mode and load S Notice or...

Page 37: ...the UPS transfers to Normal mode operation while the battery recharges Bypass Mode The UPS is operating in Bypass mode through the static bypass switch The status icon and background of the icon are flashing Battery mode is not available UPS in Overload Condition The status icon and background of the icon are flashing Bad Battery Detected or Battery Disconnected The status icon and background of t...

Page 38: ...e 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...

Page 39: ...m the Settings menu see page 45 Event Log The Event Log holds up to 50 events You can scroll through the event screens beginning with the most recent event NOTE The date format depends 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...

Page 40: ...m 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 includ...

Page 41: ...ries on page 61 Reset Error State Reset Alarms yes no Manually clears any latched alarms such as bad battery detected overload or DC Bus OV UV If a bad battery alarm was also active reset the battery test status to Not Tested Load Segments Load segment 1 on off Load segment 2 on off These on off commands override automatic load segment on off controls made by the Automatic Start Delay and Automati...

Page 42: ...be changed by the user Table 7 Settings Description Available Settings Default Setting Change Language English French German Spanish Japanese Simplified Chinese Russian Korean Traditional Chinese English User Password Enabled Disabled If Enabled the default password is USER NOTE If you enter an incorrect password the message Wrong Password appears Press any button to return to the password screen ...

Page 43: ...rload Alarm Level 10 20 30 100 If 100 the UPS issues an Output Overload alarm at load 100 NOTE Output Overload Level 1 by default is set to 100 and is configurable from 10 to 100 in 10 increments through the LCD setting menu This feature allows customers to be alerted before the UPS has reached its rated capacity limits 100 Automatic Start Delay Off 0s 1s 2s 32767s See Configuring Load Segments on...

Page 44: ...ting may overrule the Bypass Voltage Low Limit setting 15 of nominal Bypass Voltage High Limit 6 7 20 of nominal The Bypass operation is disabled if the measured bypass voltage level is above the nominal output voltage 10 NOTE The Qualify Bypass setting may overrule the Bypass Voltage High Limit setting 10 of nominal Qualify Bypass Always Never Bypass Disabled If Always Bypass operation is allowed...

Page 45: ...nsfers to the Bypass are allowed If Disabled unsynchronized transfers to the Bypass are not allowed NOTE The Qualify Bypass setting may overrule the Unsynchronized Transfers setting Enabled External Battery Modules EBMs 0 1 See Configuring the UPS for an EBM on page 52 0 Charger Enabled Disabled If Enabled batteries charge normally If Disabled the battery charger is off Enabled Battery Charge to R...

Page 46: ...atistic is set to the current date and time No Reset Peak Headroom Watts No Yes If No no action If Yes the Peak Headroom Watts value is cleared and the date and time stamp for this statistic is set to the current date and time No Clear Event Log The number after Total events shows how many events are currently stored in the log Press the button for longer one second to reset the event count to zer...

Page 47: ...hes indicating Bypass mode Transferring from Bypass to Normal Mode To transfer from Bypass to Normal 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 button to enter the Control menu 3 Select Go to Normal The text on the screen changes to Normal Command Sent The Normal mode icon flashes indicating N...

Page 48: ...m and supports load until low battery shutdown level is reached 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 Transfers to Fault mode in 2 min 1 sec Transfers to Fault mode in 12 sec 1 sec or when low battery shutdown level is reached Level 3 110 Transfers to Bypass mode immediately If Bypass mode is not avail...

Page 49: ...gments 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 longer than one second to go to the main menu selection and scroll down to the Control menu using the button 2 Press the b...

Page 50: ...r longer than one second to go to the main menu selection and scroll down to the Settings menu using the button 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 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 Se...

Page 51: ...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 longer than one second to go to the main menu selection and scroll down to the Settings menu using the button 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 opt...

Page 52: ...n using power management software configure the UPS for the EBM 1 Press the button for longer than one second to go to the main menu selection and scroll down to the Settings menu using the button 2 Press the button to enter the Settings menu 3 Use the button to scroll to the External Battery Modules option and press the button The battery number value begins to flash 4 Set the battery number valu...

Page 53: ...e higher than 10 Configuring Automatic Battery Tests To configure the automatic battery tests 1 Press the button for longer than one second to go to the main menu selection and scroll down to the Settings menu using the button 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 The option begins to flash 4 Select wheth...

Page 54: ... not supplied See 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 pin...

Page 55: ...signment 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 NOTE Unused pins must be left free on all models ...

Page 56: ...e 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 Network Management Card on a 5600W OL UPS 208V For details on disabling control commands from the Dell Network Management Card see the Control Commands from Serial Port setting on page 43...

Page 57: ... 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 Comma...

Page 58: ... 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 transport CAUTION The following procedure should be performed or supervised by personnel knowledgeab...

Page 59: ...Maintenance 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 Disconnecting the Internal Battery Connectors ...

Page 60: ...ong 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 s...

Page 61: ...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 status screen displays Battery test running and the percentage of the test completed The results display on the UPS status screen when co...

Page 62: ...Module EBM 5600R EBM K812N 216 Vdc 30A Table 11 Dimensions and Weights UPS Models EBM Model UPS Dimensions W H D 438 0 171 5 801 4 mm 17 2 6 8 31 5 438 0 127 0 735 0 mm 17 2 5 0 29 0 Rack Unit Size 4U 3U Weights 72 0 kg 158 7 lb 59 0 kg 130 1 lb Table 12 Electrical Input 208V Models 230V Models Nominal Voltage 200 208V 220 240V Nominal Voltage Range 200 208V auto sensing 160 286V auto sensing Nomi...

Page 63: ...ge 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 Voltage Waveform Sine wave Output Receptacles 2 NEMA L6 30R 30A 4 IEC 320 C19 20A 4 IEC 320 C19 16A for IEC 20A for UL 6 IEC 320 C13 10A for IEC 15A for UL ...

Page 64: ...ass 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...

Page 65: ... 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 5600W internal batteries 5 5 minutes at full load 17 minutes at half load 5600W with one EBM attached 19 minutes at full load 45 minutes at half load Battery runtimes are approximate and vary depending on the load configuratio...

Page 66: ... 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 t...

Page 67: ...utton 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 16 describes typical alarms and conditions Table 16 Typical Alarms and Conditions Alarm or Condition Possible Cause Action The UPS doe...

Page 68: ...UPS was manually commanded to transfer to Bypass mode and will remain in bypass until commanded None Battery Disconnected Alarm 199 Continuous Alarm The UPS does not recognize the internal batteries If the condition persists contact your service representative Battery voltage is lower than the batteries disconnected level defined for this UPS This may be due to a blown fuse intermittent battery co...

Page 69: ...ad Input AC Under Voltage Alarm 7 Intermittent Alarm The utility voltage is below the minimum operating range The UPS transfers to Battery mode if supporting load Input Under Over Frequency Alarm 8 Intermittent Alarm The utility frequency is out of usable frequency range The UPS transfers to Battery mode if supporting load Site Wiring Problem Alarm 194 Continuous Alarm An alarm triggers when the d...

Page 70: ...the charger until the next power recycle Contact your service representative Charger Failure Alarm 34 Continuous Alarm A battery charger fault has been detected The UPS turns off the charger until the next power recycle Contact your service representative Inverter AC Over Voltage Alarm 0 Intermittent Alarm The UPS has detected abnormally high output voltage levels The UPS transfers to Bypass mode ...

Page 71: ...Present alarm is active Rectifier Input Over Current Alarm 26 Continuous Alarm The UPS has detected that rectifier input current limits have been exceeded The UPS transfers to Battery mode if supporting the load Inverter Output Over Current Alarm 27 Continuous Alarm The UPS has detected that the inverter output current limits have been exceeded The UPS transfers to Bypass mode if supporting the lo...

Page 72: ...EEPROM Fault Alarm 53 Continuous Alarm There is EEPROM data corruption due to a failed device or incorrect flash upgrade Contact your service representative Output Short Circuit Alarm 58 Continuous Alarm The UPS has detected an abnormally low impedance placed on its output and considers it a short circuit If the UPS is in Normal mode the UPS transfers to Bypass mode if available otherwise the UPS ...

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