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Operation
79
Rectifier Fail Rectifier Fail Fault YES YES YES YES
This is a summary event based on the
detection of at least one of these faults
being active: Battery Overcharge; DC
Overvoltage Steady State; DC Overvoltage
Transient; DC Undervoltage Steady State;
Delta-Wye Current Imbalance; Rectifier
Fuse Fail; Rectifier Drive 1 Fail; Rectifier
Drive 2 Fail. All actions are controlled by the
causal fault.
Inverter Fail Inverter Fail Fault YES YES YES YES
This is a summary event based on the
detection of at least one of the following;
IDC Peak; IGBT Drive Fail; Output
Overvoltage Transfer; Output Undervoltage
Transfer; Inverter DC Offset. All actions are
controlled by the causal faults.
Ovtemp time-
out Sd
Overtemp
Time-out
Shutdown
Fault YES YES NO YES
An Equipment Over-temperature condition
has persisted for more than 10 minutes.
The load is transferred to the bypass line
and the UPS module is shut down. Check
the air intake, air exhaust, and filters before
attempting to start-up the UPS.
Transfer
Failed Sd
Transfer Failed
Shutdown
Fault YES YES YES YES
A transfer to Static Bypass was
unsuccessfully attempted and power to the
load was lost. Attempt to restart the system.
Contact Liebert Global Services.
Ctrl Fault
SBS on
Controller fault
SBS on
Fault YES YES NO YES
Indicates that the unit has transferred to
SBS without the knowledge of the UPSC. It
occurs when the UPSC’s Watchdog Fail
line is automatically asserted during a
UPSC reset. This is a permanent (latched)
condition which requires service. Contact
Liebert Global Services at once.
Hardware Sd
Hardware
Shutdown
Fault YES NO NO YES
At least one of the following alarm
conditions is present: Inverter Fault,
Rectifier Fuse Blown, Reverse Power, Over
load Shutdown, logic power supply failure,
or inverter output symmetry failure. The
load automatically transfers to the bypass
line. The UPS module is shut down and
isolated. Contact Liebert Global Services at
once. Do not attempt to reset the UPS.
Opt pwr
supply Fail
Option Power
Supply Fail
Fault YES YES NO YES
The Option Power Supply has failed.
Remote Alarm Status panels may be
disabled. Contact Liebert Global Service.
Table 7 Alarms, functions, and corrective actions (continued)
Actual
Alarm/fault
Name
Displayed
On Front
Panel
Description
of Alarm/
Fault
Fault
Or
Alarm
Latch
Mask
Dial
Mask
Freeze
Mask
Event Log
Mask Meaning and Corrective Action(s)