Troubleshooting the PRO-RT 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
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