![]() Useful for basic troubleshooting as it resets the logic of the UPS.Ģ) Press and hold the OFF button again (Alternately, you could disconnect the internal battery)ģ) You may see a quick flash of the LED's and you should hear an audible ""click"" from the UPS.Ĥ) Plug UPS back into the wall and turn UPS back onįor SMC, SCL, SMT, SMTL, SMX, and SRT Units:ģ) You may hear an audible ""click"" from the UPS. It forces a "reboot" of the internal microprocessor, but it will not erase any stored settings. If you have an SUA or SUM unit, you can use this procedure to switch between Serial and USB communications. The following video demonstrates how to perform a Cold Start on a SUA series Smart-UPS: Please contact APC Technical support for further assistance. If your UPS will not cold start, it either means that the UPS has suffered an internal hardware failure or that it does not have a functional internal battery. If the input power is acceptable the UPS will transfer back online. This shows that the UPS is functioning correctly and can both pass a self test and function on battery.ĥ) You can now plug your UPS back into the wall. If you let go after the beep ends you will need to try again.Ĥ) UPS should go through its' normal self test and end up on battery with 4 beeps every 30 seconds. Remove any attached load.Ģ) Press and hold the power button (labeled ""I/TEST"" on legacy non-LCD screen units) on the front of the UPS until you hear a LONG beep.ģ) Let go DURING the long beep. If there is no load attached, the battery will appear healthy.ġ) Turn off and unplug the Smart-UPS from wall. This is because the self-test is comparing the battery health compared to the load attached. Never use a Cold Start to troubleshoot a bad battery LED as it will clear the light most every time even if the battery is actually bad. This is a great way to establish if a UPS will not turn on due to bad input power. Another way to perform a self-test is by turning off the circuit breaker for the circuit the UPS is plugged into or unplugging the unit from the wall. ![]() It does not however reset saved preferences. To run a self-test, open the Power Panel software and then click Initiate Self Test. ![]() The Brain Dead procedure performs a hard reset of the Smart-Ups microprocessor. The Cold start procedure is used to determine if a UPS is functional if it will not turn on when plugged into utility power. This document explains how to perform the Cold Start and Brain Dead procedures.
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