Battery switch is not properly Close the battery switch； closed； 14 Can not Black start Change the fuse； Battery fuse is not open； Recharge the battery Or Battery low Buzzer beeps continuously and Consult with your local agent for 15 LCD indicates UPS is out of order repair Rectifier fault or output fault Appendix 4 RS232 communication port definition Definition of Male port: Connection between PC RS232 port and UPS RS232 port PC RS232 port UPS RS232 port Pin 2 Pin 2 UPS send,PC receive Pin 3 Pin 3 PC send,UPS receive Pin 5 Pin 5 ground Available function of RS232 Monitor UPS power status. Monitor UPS alarm info. Monitor UPS running parameters. Timing off/on setting.
14 Can not Black start Battery switch is not properly closed； Battery fuse is not open； Or Battery low Close the battery switch； Change the fuse； Recharge the battery 15 Buzzer beeps continuously and LCD indicates Rectifier fault or output fault UPS is out of order Consult with your local agent for repair Appendix 4 RS232 communication port definition Definition of Male port: Connection between PC RS232 port and UPS RS232 port PC RS232 port UPS RS232 port Pin 2 Pin 2 UPS send,PC receive Pin 3 Pin 3 PC send,UPS receive Pin 5 Pin 5 ground Available function of RS232 Monitor UPS power status. Monitor UPS alarm info. Monitor UPS running parameters. Timing off/on setting.