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{"searchBar":{"inputPlaceholder":"Rechercher par mot-clé ou poser une question","searchBtn":"Rechercher","error":"Veuillez saisir un mot-clé pour effectuer une recherche"}}Why doesn't the serial communications work on a Smart-UPS SUA model when USB communications has been tried first?
Issue:
Connecting a USB cable to an SUA Smart-UPS disables the serial port
Product Line:
Smart-UPS
Environment:
All SUA models, All Serial Numbers
Cause:
Normal operation.
Resolution:
In order to regain serial communications with an SUA model Smart-UPS after USB has been used, the USB cable must be removed and the Smart-UPS must be brain deaded. To brain dead a Smart-UPS, the load must be turned off and unplugged. Next, the UPS must be turned off and unplugged. Once unplugged, push and hold the off button for 6 to 8 seconds. The sensitivity light in the back of the UPS should go out and there should be a small audible click in the unit. Serial communications should be enabled at this point and the UPS can be again plugged in and started up.