TROUBLESHOOTING
Alarm or Condition | Possible Cause | Action |
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Check Parallel Board | The UPS is not recognizing another |
| parallel unit. |
From the UPS Status menu, select the Units on CAN Bus option and verify that all UPSs appear in the list.
If any UPS is missing, verify the Powerware Hot Sync CAN Bridge Card connections and recheck the status from the UPS front panel.
If all UPSs appear in the list, check the
Set the system to internal Bypass mode (see page 53).
If the condition persists, contact your service representative.
Abnormal output voltage | The UPS breaker on the parallel tie |
at startup | cabinet was not switched to the ON |
| position properly. |
Shut down the UPS where the alarm is indicated. Switch the UPS breaker on the parallel tie cabinet to the ON position.
Start up the UPS.
Select the System On option through the front panel of the UPS that was turned off.
Selective Trip | The Powerware Hot Sync CAN Bridge |
| Card is not wired correctly. |
Verify the CAN wiring (see page 26). Verify the
If the condition persists, contact your service representative.
Before silencing an alarm, check the alarm condition and perform the applicable action to resolve the condition.
Press any button on the front panel display to silence the alarm. If the alarm status changes, the alarm beeps again, overriding the previous alarm silencing.
EATON Powerware® 9155 Parallel UPS | 57 |