| Troubleshooting the Pro Rackmount Series UPS |
| Symptom |
Possible Cause |
What to do |
| UPS will not turn on |
On/Off button not pushed |
Press On button momentarily (one beep) to start UPS |
| UPS operates in battery mode only, even though there is normal AC present |
Input AC
breaker is tripped |
Reset circuit
breaker by pressing the plunger back in. 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 Site Wiring
Fault LED is illuminated |
Incorrect
service wiring |
Have a qualified electrician correct the service wiring |
| The Online/On Battery LED is
illuminated, but there is no output |
The UPS is being controlled via
its communications port |
Disconnect the communications
cable from the UPS and press the On button momentarily. If the UPS works normally,
software has control of the UPS |
| UPS does not
provide expected backup time |
The batteries
may be weak or at the end of useful service life |
Charge the
batteries for 8 hours and retest. If the backup time is still less than expected, the
batteries may need to be replaced, even though the Replace Battery LED is not illuminated |
| Replace Battery LED is
illuminated |
Weak or bad batteries, or bad
battery connection |
Check the battery connection
and/or replace the batteries. Follow battery replacement procedures in Section 6 |
| The UPS
occasionally emits a beep |
Normal
operation |
The UPS is
performing its intended function |
