Issue:
What are the basic troubleshooting steps for the Smart-UPS SCL500RM1U / SCL500RM1UC / SCL500RM1UNC?

Product Line:
APC Smart-UPS SCL500RM1U / SCL500RM1UC / SCL500RM1UNC

Environment:
All Serial Numbers

Cause:
During normal operation, you may find your UPS not functioning as expected. This may be due to a malfunction, configuration issue, or the install environment.

This document will assist you with basic troubleshooting steps.

For assistance with complex UPS problems, please contact the Customer Care Center at https://www.apc.com/us/en/support/

Problem and Possible Cause	Solution
The UPS will not turn on or there is no output.
The unit has not been turned on.	Press the ON key once to turn on the UPS.
The UPS is not connected to AC power.	Be sure the power cable is securely connected to the unit and to the AC power supply.
The input circuit breaker has tripped.	Reduce the load on the UPS. Disconnect nonessential equipment and reset the circuit breaker.
The unit shows very low or no input AC voltage	Contact a qualified electrician to correct wiring issue
The battery connector plug is not securely connected.	Be sure that all battery connections are secure.
There is an internal UPS error detected.	Do not attempt to use the UPS. Turn off the UPS and unplug it from AC. Contact APC Customer Care Center for assistance.
The unit cannot remotely turn on.	When network cable is disconnected with the UPS turned off and AC power connected the UPS will, after a while, automatically enter power saving mode. Tap the power button to wake up the UPS and enable its remote control feature.
The UPS is operating on battery, while connected to input AC power.
The input circuit breaker has tripped.	Reduce the load on the UPS. Disconnect nonessential equipment and reset the circuit breaker.
There is very high, very low, or distorted input line voltage.	Move the UPS to a different outlet on a different circuit. Test the input voltage with the AC voltage display. If acceptable to the connected equipment, reduce the UPS sensitivity.
UPS is emitting intermittent beeps.
The UPS is operating normally.	None. The UPS is helping protect the connected equipment
UPS does not provide expected backup time.
The UPS battery is weak due to a recent power outage or is near the end of its service life.	Charge the battery. Batteries require recharging after extended outages and wear out faster when put into service often or when operated at elevated temperatures. If the battery is near the end of its service life, consider replacing the entire UPS even if the Battery Error indicator has not illuminated.
The UPS is experiencing an overload condition.	Check the UPS load display. Unplug unnecessary equipment, such as printers.
Display interface LEDs flash sequentially.
The UPS has been shut down remotely through software or an optional accessory card.	None. The UPS will restart automatically when AC power is restored.
The Error LED is illuminated. The UPS displays an error message and emits a constant beeping sound.
Internal UPS error detected.	Do not attempt to use the UPS. Turn the UPS off and contact the Customer Care Center immediately.
The Battery Error icon is illuminated and the UPS beeps for one minute every five hours.
The battery has a weak charge.	Allow the battery to recharge for at least four hours. Then, perform a self-test. If the problem persists after recharging, replace the entire UPS unit.
The Battery Error icon is flashing and the UPS beeps once every 2 seconds.
The battery is not properly connected.	Be sure that the battery connector is securely connected.
The UPS displays a site wiring error message.
Wiring errors detected include missing ground, line-neutral polarity reversal, and overloaded neutral circuit.	If the UPS indicates a site wiring error, have a qualified electrician inspect the building wiring. (Applicable to 120 V units only.)

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