Marathon Power SDRS-0300-H1, User Manual

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6. Appendix A - Troubleshooting
PROBLEM CAUSE CORRECTIVE ACTION
If UPS does
not turn ON
(OR)
LED does not
Illuminate
ON/OFF/TEST/SILENCE button not
pushed or push-time too short
Press the ON/OFF/TEST/SILENCE button
more than 1 second
Battery voltage less than 10V Recharge the UPS for at least 6 hours
PCB failure Replace the PCB, call for service
Load less than 40W in battery mode
Normal condition, “No load shutdown function”
is active
UPS always in
battery mode
Loose AC input connection Recheck input connection
Blown input AC fuse Replace the AC fuse
Line voltage too high, too low or AC power
failure
Normal condition
PCB failure Replace PCB, call for service
Back up time
too short
Battery not fully charged Recharge the UPS at least 6 hours
PCB failure Replace PCB, call for service
Buzzer beeps
continuously
Output Overload Remove some loads