#114 | Maintenance Bypass Mis-Operation
|Product||APC Silcon 60kVA Maintenance Bypass|
|Synopsis||Customer called in with a report of the UPS being in Bypass. Additionally reported that some circuits had gone out and it tripped the UPS unit to Bypass mode with an Internal Hardware Fault.|
|Preliminary Actions||Upon arrival, found UPS in Bypass Mode with Internal Error Alarm. Also found all three Maintenance Bypass Breakers, Q1, Q2 and Q3 all closed at the same time.|
|Resolution||Opened Q3 and UPS came on-line in Normal Operation. Reviewed alarm history and overall condition of UPS prior to departing site. UPS on-line with no alarms.|
|Root Cause||Customer had an HVAC failure on site, and in response to the failure, plugged in several spot coolers which created an overload condition on the UPS system. In reaction to the overload, someone accidentally mis-operated the Maintenance Bypass Panel in an effort to restore proper operation to the UPS. The UPS went into ‘protective’ mode. Recommend customer give consideration to UPS 101 Critical Power customer training in order to better understand system functionality and operation.|
News Article The fastest growing waste streams in the industrialized world are discarded electronics equipment due to the growing use of these products. In the UPS industry, companies do their part to help reduce the carbon footprint and support a cleaner, more...
News Article UPS Systems are complex pieces of highly technical electronic equipment and need regular preventive maintenance (PM). The maintenance intervals can vary from one to four PM inspections per year or in some cases, even monthly. The top main causes for UPS...
News Article Eaton continues to expand the 9PX UPS portfolio which will provide industry-leading features in capacity, efficiency and usability. Eaton’s newest products: 9PX UPS - 700, 1000 and 1500 VA models will make it easier than ever for companies to protect...