Question about Compaq 500 UPS Pro ( 300W / 120V / NA ) (155373001) UPS System

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Compaq Pro UPS 500 UPS System - light on far left indicator is blinking and there is a constant clicking noise (that is driving me crazy!!!) I would guess there is a battery in the unit that needs replacement, but seek confirmation or other ideas, thanks!

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Maybe the battery, but I think you have a serious over and under voltage issue that causing the AVR to click on and off again.

May I suggest a PMM117 power guard as a tool to monitor the power. If the voltage drops, current rises, it switchs of the power....once. Not like on and off/ on and off/ you loose 50 watts everytime that happens.

Otherwise a $30.00 battery plus shipping I can help you with.

Posted on Sep 08, 2009


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You can find support for Minuteman UPS' HERE.

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Thank you
BJ @:)

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