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NEC 500 UPS

Uninterruptible Power Supply

100 VAC User’s Manual

990-5021, Revision 1, 12/98

N8580-31

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Summary of Contents for 500 UPS

Page 1: ...NEC 500 UPS Uninterruptible Power Supply 100 VAC User s Manual 990 5021 Revision 1 12 98 N8580 31 ...

Page 2: ... isolates your equipment from large disturbances by internally disconnecting from the AC voltage while supplying power from its internal batteries until the AC voltage returns to safe levels While running on battery an internal alarm will sound periodic beeps The ON TEST button may be pressed to silence the UPS alarm for this or any other fault condition If the AC voltage does not return the UPS w...

Page 3: ... 2 3 Attention from the Operational and Maintenance Points of View 3 4 Before Installing 3 5 Name and Function of Parts 4 6 Installation 6 7 Operating Instructions 7 8 Function 8 9 Abnormal Conditions and Protection Functions 9 10 Troubleshooting 10 11 Maintenance and Checks 11 Specifications 12 ...

Page 4: ...1 1 Safety ...

Page 5: ...AC circuit breaker to standby Then disconnect the batteries including any expansion units Finally disconnect the AC power from the building power supply Pluggable equipment includes a protective earth conductor which carries the leakage current from the load devices computer equipment Total leakage current must not exceed 3 5 mA Use of this equipment in life support applications where failure of t...

Page 6: ... fluctuations Set up the environment for the UPS The UPS should be placed in an environment within its temperature and humidity specifications and avoiding direct sunlight Allow airflow around the UPS The airflow around the UPS should be adequate to provide cooling Replace the battery Replace the battery at the recommended intervals Do not operate the UPS with its cover removed Using the UPS witho...

Page 7: ...line operation and lights the replace battery LED The loads are not affected by a failed test Recharge the battery overnight and perform the self test again If the replace battery LED is still on replace the battery using the Replacing the Battery procedure SmartTrim The SmartTrim LED comes on to indicate that the UPS is compensating for a high voltage SmartBoost The SmartBoost LED comes on to ind...

Page 8: ...lit the load is drawing between 50 and 67 of the UPS s capacity If all five LEDs light thoroughly test your complete system to make sure that the UPS will not become overloaded Cold Start When the UPS is off and there is no utility power use the cold start feature to apply power to the loads from the UPS s battery Note Cold start is not a normal condition Press and hold the on test button until th...

Page 9: ...uppression device s ground lead Tighten the screw to secure the lead 6 Installation 1 Install the UPS Plug the power cord into the UPS and into the AC voltage 2 Connect the Equipment Do not power laser printers through the UPS Use your equipment s power cords to connect to the UPS Turn on all connected equipment 3 Charge the battery The UPS charges its battery whenever it is connected to utility p...

Page 10: ...ttery During on battery operation the on battery LED illuminates and the UPS sounds an audible alarm consisting of four beeps every 30 seconds Low Battery When the UPS is operating on battery and the energy reserve of the battery runs low the UPS beeps continuously until the UPS shuts down from battery exhaustion or returns to on line operation Battery Charge Bar Graph The 5 LED display on the rig...

Page 11: ...diately returns to on line operation and lights the replace battery LED The loads are not affected by a failed test Recharge the battery overnight and perform the self test again If the replace battery LED is still on replace the battery using the Replacing the Battery procedure Automatic Voltage Regulation A transformer with a winding that can be switched to boost or trim the AC line voltage is u...

Page 12: ... until the UPS shuts down from battery exhaustion or returns to on line operation Replace Battery If the battery fails a self test the UPS emits short beeps for one minute and the replace battery LED illuminates The UPS repeats the alarm every five hours Perform the self test procedure to confirm replace battery conditions The alarm stops when the battery passes the self test Battery Disconnected ...

Page 13: ... voltage Move the UPS to a different outlet on a different circuit Test the input voltage with the utility voltage display If acceptable to the load reduce the UPS s sensitivity Consult the UPSC documentation for procedures UPS beeps occasionally Normal UPS operation None The UPS is protecting the load UPS does not provide expected backup time The UPS s battery is weak due to recent outage or is n...

Page 14: ...5 C 86 to 113 F charge the UPS s battery every 3 months Daily Check Check the front bezel LEDs and the temperature of the room in which the UPS resides Scheduled Check Once a year check the UPS for discoloration anywhere frayed cables or power cords or other signs of deterioration Check that the air flow around the UPS is adequate and that the vent is clear Battery Life Temperature Battery Life Ch...

Page 15: ...l proof maintenance free sealed lead acid Typical battery life life varies typical 2 years depending on number of discharge cycles and ambient temperature Typical recharge time 2 to 5 hours from total discharge Operating temperature 0 to 40 ºC 32 to 104 ºF Storage temperature 15 to 45 ºC 5 to 113 ºF Operating and storage relative humidity 5 to 95 non condensing Operating elevation 0 to 3 000 m 0 t...

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