Troubleshooting
Bypass mode
Symptom
LED is on.
Cause
• An overload or a fault has occurred.
• A command has been received and the UPS is in Bypass mode.
Action
1. Equipment is powered but not protected by the UPS.
2. Check one of the following alarms.
• Overtemperature
• Overload
• UPS failure
Battery low
Symptom
LED is on, one beep for every three seconds.
Cause
The UPS is in Battery mode and the battery is running low.
Action
1. The warning is approximate, and the actual time to shutdown may vary significantly.
2. Depending on the UPS load and number of ERMs, the battery low warning might occur before the
batteries reach 20% capacity.
No battery
Symptom
LED is on, continuous beep.
Cause
The batteries are disconnected.
Troubleshooting 31
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