| Symptom |
Possible Cause |
What to do |
| UPS will not turn on | On /Off /Test button not pushed | Press and release the On/Off/ Test button to start UPS |
| UPS operates in battery mode only, even though there is normal AC present | Input AC circuit breaker is tripped | Reset circuit breaker by pressing the plunger back in. If the AC circuit breaker trips after UPS starts up, reduce the load on the UPS |
| Fault LED is illuminated | UPS has detected an internal fault | Call for service |
| The On-Line LED is illuminated, but there is no output | The UPS is being controlled via its communications port | Disconnect the computer cable from the UPS and press the On button. If UPS works normally, the software has control of the UPS |
| UPS does not provide the expected runtime | The batteries may be weak or at the end of useful service life | Charge the batteries for 8 hours and retest . -If the runtime is still less than expected, the batteries may need to be replaced, even though the Weak/Bad Battery LED is not illuminated |
| Weak/Bad Battery LED is illuminated | Loose connections at the batteries, Weak batteries, Bad batteries | Check battery connections, charge the batteries for 8hours and then retest, replace the batteries |
| Overload LED is illuminated and a constant alarm | The load has exceeded the UPS's capacity | Check the specifications (see section 8 in user's manual). Remove part of the load |
| The On-Line LED is illuminated and Load Segment 1 has an output, but there is no output from Load Segment 2 | The output breaker for Load Segment 2 is tripped , Load Segment 2 was turned off by the software or the SNMP card | Reset the output breaker for Load Segment 2, turn on Load Segment 2 by the software or the SNMP card |
