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Troubleshooting – Status and Alarm Messages
36 Smart-UPS® VT 10-40 kVA 400V, 208V, 200V – Operation 990-2282A-001
System Not Synchro-
nized to Bypass.
The system cannot synchronize to
bypass. The mode may not be avail-
able.
Option 1: Decrease the input fre-
quency sensitivity.
Contact APC Customer Support
(see back cover).
Option 2: Correct the bypass input
voltage to provide acceptable voltage
on frequency.
UPS In Bypass Due To
Fault.
The UPS has transferred to Bypass
Mode because a fault has occurred.
Contact APC Customer Support
(see back cover).
UPS In Bypass Due To
Overload.
The load exceeded the power
capacity. The UPS has switched to
Bypass Mode.
Decrease the load.
UPS Is Overloaded. The load exceeded the system power
capacity.
Option 1: Decrease the load.
Option 2: Check the load distribution
on the 3 phases via the display. If the
load is unevenly distributed, adjust
the load distribution.
Weak Batt(s) Detected.
Reduced Runtime.
One or more weak batteries detected. Replace the weak batteries.
XR Battery Fuse Blown. XR Battery Fuse blown. Runtime is
lower than expected.
Replace the blown fuse in XR Enclo-
sure (only applicable if your installa-
tion includes an XR
Enclosure).
Display Message Meaning Corrective Action