Co. Ltd. Power Supply USER`S MANUAL 325A ,425A ,525A , 625A , 425AP, 525AP, 625AP

10. Troubleshooting
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PROBLEM POSSIBLE CAUSE ACTION TO TAKE
On/off/test/silence
button not pushed or
push too short
Press the on/off/test/silence
button more than 1 second
Battery voltage less than
10V
Recharge the ups at least 4 hours
PCB failure Replace the PCB, call for service
UPS not on
LED not light
Load less than 20W at
battery mode
Normal condition
Power cord lose Replug the power cord
AC FUSE burn out Replace the AC fuse
Line voltage too high, too
low or black out
Normal condition
UPS always at
battery mode
PCB failure Replace PCB, call for service
battery not fully charged Recharge the UPS at least 4 hoursBack up time
too short
PCB failure Replace PCB, call for service
Buzzer
continuous
beeping
Overload Remove the noncritical loads
RED LED light Battery failure Replace battery, call for service