PROBLEM AND/OR POSSIBLE

 

SOLUTION

CAUSE

 

 

THE OVERLOAD LED IS ILLUMINATED AND THE UPS EMITS A SUSTAINED ALARM TONE

 

 

 

The UPS is overloaded. The

 

The connected equipment exceeds the specified “maximum load.”

connected equipment is draw-

 

The alarm remains on until the overload is removed. Disconnect nonessen-

ing more VA than the UPS can

 

 

tial equipment from the UPS to eliminate the overload.

sustain.

 

 

The UPS continues to supply power as long as it is on-line and the circuit

 

 

 

 

breaker does not trip; the UPS will not provide power from batteries in the

 

 

event of a utility voltage interruption.

 

 

If a continuous overload occurs while the UPS is on battery, the unit turns

 

 

off output in order to protect the UPS from possible damage.

 

 

THE REPLACE BATTERY LED IS ILLUMINATED

 

 

 

Weak battery.

 

Allow the battery to recharge for 24 hours. Then, perform a self-test. If the

 

 

problem persists after recharging, replace the battery.

 

 

 

Failure of a battery 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 after the battery has charged for 24 hours to confirm the

 

 

replace battery condition. The alarm stops and the LED clears if the battery

 

 

passes the self-test.

 

 

THE SITE WIRING FAULT LED ON THE REAR PANEL IS ILLUMINATED (110/120 V MODEL ONLY)

 

 

 

The UPS is plugged into an

 

Wiring faults detected include missing ground, hot-neutral polarity reversal,

improperly wired utility power

 

and overloaded neutral circuit.

outlet.

 

Contact a qualified electrician to correct the building wiring.

 

 

 

 

THE INPUT CIRCUIT BREAKER HAS TRIPPED

 

 

 

The UPS is overloaded. The

 

Reduce the load on the UPS by unplugging equipment. Press in the plunger

plunger on the circuit breaker

 

on the circuit breaker.

has popped out.

 

 

 

 

UPS OPERATES ON BATTERY ALTHOUGH UTILITY VOLTAGE EXISTS

 

 

 

The UPS input circuit breaker

 

To reduce the load on the UPS, unplug equipment and press in the plunger

has tripped.

 

on the circuit breaker.

 

 

 

The line voltage is very high,

 

Move the UPS to a different outlet on a different circuit, as inexpensive fuel

low or distorted.

 

powered generators may distort the voltage. If acceptable to the connected

 

 

equipment, reduce the UPS sensitivity (see User Configurable Items).

 

 

 

ON-LINE LED

 

 

 

 

 

There is no illumination.

 

The UPS is running on battery, or it must be turned on.

 

 

 

The LED is blinking.

 

The UPS is running an internal self-test.

 

 

 

11

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American Power Conversion 450 VA, SC450RM1U, 250 VA user manual Replace Battery LED is Illuminated
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SC450RM1U, 250 VA, 450 VA specifications

American Power Conversion (APC), a leader in power protection and management, offers a range of uninterruptible power supplies (UPS) designed to meet the needs of various applications. The APC SC450RM1U is a highly regarded model in the 450 VA class, specifically tailored for critical equipment in server rooms and network closets. This UPS is engineered to ensure continuous power, safeguarding against unexpected outages and voltage fluctuations.

Among the key features of the APC SC450RM1U is its compact 1U rack-mount form factor, making it an ideal choice for limited space environments. Its 450 VA capacity is sufficient for protecting essential server and networking devices, providing the necessary runtime to safely reboot systems and preserve data integrity. Equipped with a pure sine wave output, the SC450RM1U ensures that connected equipment receives clean and stable power, which is crucial for maintaining optimal performance of sensitive electronics.

The SC450RM1U incorporates advanced technologies such as Automatic Voltage Regulation (AVR), which stabilizes voltage variations, ensuring that connected devices are shielded from harmful surges and dips. This technology helps extend battery life and enhances overall reliability, making it a cost-effective solution for power management.

Furthermore, the UPS includes a range of communication options to monitor power status and manage operations seamlessly. It features USB and serial connectivity, allowing users to easily interface with management software for real-time monitoring and control, enabling proactive maintenance and alerts in case of power issues.

Efficiency is another hallmark of the APC SC450RM1U, with a user-friendly interface that includes LED indicators for battery status, load level, and power events. It is designed for easy installation and maintenance, with hot-swappable batteries that can be replaced without powering down connected equipment, ensuring minimal disruption in service.

In conclusion, the APC SC450RM1U is a robust power management solution, defined by its compact size, advanced technology features like AVR and pure sine wave output, and flexible communication options. With its ability to enhance productivity and protect critical devices, it stands out as an essential component for any professional setup requiring reliable power protection.
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