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Troubleshooting: UPS Alarms
22 Symmetra PX 160 kW 400 V Operation 990-3015-001
External DC Disconnect Switch
Open
The external DC DISCONNECT switch
tripped. Battery power is not
available or the runtime is lower than
expected.
Close the external
DC DISCONNECT switch.
Check the fuse on the XR battery
enclosure. If the fuse has blown, contact
APC Customer Support.
External Switch Gear
Communication Card Fault
The external switch gear
communication card has failed.
See “How to replace a power management
peripheral” on page 18.
External Switch Gear
Communication Card Removed
The system no longer detects an
external switch gear communication
card.
Option 1: Ensure the external switch gear
communication card is installed properly.
Option 2: Replace the external switch gear
communication card.
Graceful Shutdown Initiated A graceful shutdown or reboot has
been initiated from the display
interface or other accessory.
No corrective action necessary.
High Isolation Transformer
Temperature
The isolation transformer
temperature is too high.
Contact APC Customer Support.
Internal Communications Failed One of the buses used for the
communication between the UPS
modules has failed.
Contact APC Customer Support.
In Bypass: Hardware Fault The system has transferred into
bypass because a fault has occurred.
Contact APC Customer Support.
In Bypass: Overload The system has transferred into
bypass because the load has
exceeded the power capacity of the
system.
Option 1: Decrease the load.
Option 2: Add a power module to the
system.
In Bypass: User-Initiated The system has been transferred into
bypass due to user action.
Check for any problems with the system.
Transfer the system to normal operation.
Input Voltage or Frequency
Cannot Support Bypass
The frequency or voltage is out of
acceptable range for bypass. This
message occurs when the UPS is
online, and indicates that the bypass
mode may not be available if
required.
Correct the input voltage to provide
acceptable voltage or frequency.
Intelligence Module Fault The main intelligence module has
failed and requires replacement.
Replace the main intelligence module. See
“How to replace an intelligence module
(MIM/RIM)” on page 18.
Load (kVA) Alarm Violation The load has exceeded the user-
specified load alarm threshold.
Option 1: Use the display interface to raise
the alarm threshold.
Option 2: Reduce the load.
Local Management-To-UPS
Communication Lost
Internal communications in the
system have failed.
Contact APC Customer Support.
Display Message Meaning Corrective Action