Abnormal Conditions And Protection Functions - NEC 500 UPS User Manual

9. Abnormal Conditions and Protection Functions

Smart Boost / Smart Trim
The SmartBoost LED comes on to indicate that the UPS is compensating for a low voltage
The SmartTrim LED comes on to indicate that the UPS is compensating for a high voltage.
Overload
When the UPS is overloaded (when the connected loads exceed the maximum specified in the "maximum load" section under
Specifications), the overload LED comes on and the UPS emits a sustained tone. The alarm remains on until the overload is
removed. Disconnect nonessential load equipment from the UPS to eliminate the overload.
On Battery
During on-battery operation, the on-battery LED illuminates and the UPS sounds an audible alarm consisting of four beeps every
30 seconds. The alarm stops when the UPS returns to on-line operation.
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.
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
The UPS checks for proper connection of batteries. If this check fails, the UPS emits an audible alarm, the replace battery LED
illuminates, and the battery charge bar graph turns off.
Service
If the UPS requires service do not return it to the dealer!
Follow these steps:
1. Use the Troubleshooting section to eliminate common problems.
2. Verify that no circuit breakers are tripped. A tripped circuit breaker is the most common UPS problem!
3. Note the model number of the UPS, the serial number, and the date purchased. A technician will ask you to describe
the problem and try to solve it
4. If the problem persists, call customer service.
5-7-1 Shiba, Minato Ward, Tokyo
Telnet: 8-23-29721
Fax: 8-23-29739
Internet:
E-mail:
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