
Troubleshooting
Try these remedies for common APS problems before calling for help. Call Tripp Lite Customer Service at (773) 
SYMPTOM | PROBLEMS | CORRECTIONS | 
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APS does not provide  | APS not properly connected to  | Connect APS to utility power.  | 
AC output (AC input present)  | utility power.  | 
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  | Circuit breaker is tripped.  | Reset circuit breaker.  | 
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  | APS shutdown due to excessive  | Turn APS “OFF”. Wait 1 minute and  | 
  | battery voltage, indicating possible  | switch to “AUTO/REMOTE”.  | 
  | charger failure. Line disconnected  | 
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  | to prevent permanent battery  | 
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  | damage.  | 
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  | APS is set to “OFF”  | Set APS to “AUTO/REMOTE” or  | 
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APS does not provide  | Circuit breaker is tripped.  | Reset circuit breaker.  | 
AC output (AC input absent)  | 
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  | Operating Mode Switch is set  | Set Operating Mode Switch to “AUTO/  | 
  | to “CHARGE ONLY”.  | REMOTE.” | 
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  | Load or High Temperature fault.  | Turn APS “OFF”. Wait 1 minute. Remove  | 
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  | overload. Switch to “AUTO/REMOTE”.  | 
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  | Excessive battery discharge.  | Check battery condition.  | 
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APS will not charge the  | Connected batteries are dead.  | Check and replace old batteries.  | 
battery (AC input present)  | 
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  | Battery fuse* is blown.  | Check and replace fuse.  | 
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  | Battery cabling* is loose or degraded.  | Check and tighten or replace cabling.  | 
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  | APS charger failure.  | Turn APS “OFF”. Wait 1 minute and  | 
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  | switch to “AUTO/REMOTE”. If  | 
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  | automatic shutdown occurs, call Tripp  | 
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  | Lite Customer Service.  | 
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All APS Indicator Lights are  | This is normal if the APS is set  | —  | 
OFF (AC input absent)  | to   | 
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All APS Indicator Lights are  | Excessive battery discharge.  | Use an auxiliary charger* to raise  | 
OFF (AC input is present or  | 
  | battery voltage. Check external battery  | 
absent)  | 
  | connections and fuse. Automatically  | 
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  | resets when condition is cleared.  | 
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All APS Battery Indicator  | Excessive battery discharge.  | Use an auxiliary charger* to raise  | 
Lights are slowly flashing.  | 
  | battery voltage. Automatically resets  | 
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  | when condition is cleared.  | 
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APS “LO” Battery Light  | Inverter shutdown because battery  | Reset by cycling control switch to  | 
flashing  | voltage dropped too low for more  | “OFF” position then to “AUTO/  | 
  | than 5 seconds. Protects battery  | REMOTE”.  | 
  | from permanent damage.  | 
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All APS Battery Lights are  | High battery voltage shutdown  | Check all charging sources. Reset by  | 
rapidly flashing  | during Charge mode.  | cycling control switch to "OFF"  | 
then to  | 
  | “AUTO/REMOTE” or   | 
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APS “LOAD” Indicator Light  | Inverter overload caused by  | Reset by reducing load and cycling control  | 
is rapidly flashing  | excessive load or short circuit.  | switch to “OFF” position then to “AUTO/  | 
  | If sustained for more then 5  | REMOTE”.  | 
  | seconds the Inverter is shutdown.  | 
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*User supplied  | 
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