Liebert 50 and 60 Hz User Manual page 59

Table 5 Alarm Messages (continued)
Alarm Message
Charger Battery Voltage High
Charger Battery Voltage Low
Charger Fuse Blown
Charger Hardware Shutdown
Dial Out Attempt Failed
Excessive Retransfers
Attempted
Emergency off. Recycle input
to restart.
Fault Transferred to Bypass
Ground Fault detected
on DC bus.
Input Voltage Out-of-
Tolerance
Inverter Fuse Blown
Inverter Neutral SCR Open
Inverter Startup Overvolt
Meaning
The DC voltage of the battery
charger is outside the specified limits
and the charger has been turned off.
The charger will automatically restart
when the DC bus voltage returns to
within tolerance.
The battery circuit breaker is open or
the battery charger fuse has been
blown. The charger is no longer
charging the batteries.
Malfunction in the battery charger
section. If this condition persists
without service, the batteries can be
discharged.
If the unit is equipped with an internal
modem, it attempted to dial out due
to an event or command on the
modem connected to the UPS. The
attempt was unsuccessful after 3
tries.
Several automatic retransfer
attempts (20 attempts during 15
minutes or less) have been made to
retransfer the load from bypass (if
available) back to the UPS. The UPS
has not been able to consistently
sustain the load, because of an
overload condition or an inverter
failure. The load will remain on
bypass.
The UPS has been shut down from
an external contact (REPO) or the
front panel EPO switch.
The unit transferred to bypass due to
a fault or overload in the system. This
alarm accompanies the other alarms
that caused the fault.
There is a ground fault in the battery
cabinet or battery wiring.
The line to line voltage of the input
power is outside the acceptable
range. In this situation, if the voltage
is low the battery will supply power to
the critical load through the UPS.
The inverter fuse has opened
indicating a failure in the inverter
section of the UPS. The unit will
transfer the load to Bypass.
On units equipped with the isolated
neutral option, the SCR has failed.
The inverter bus is too high during
the walk-in period. Possible fault on
the PFC.
Corrective Action
Make sure battery breaker is closed.
Contact Liebert Global Services if
this condition persists for more than
15 minutes.
Check the battery circuit breaker. If
the breaker is open, try to reset. If the
breaker will not reset or is not open,
Contact Liebert Global Services.
Contact Liebert Global Services.
Check the phone number
programmed into the modem. Check
the receiving modem. Check the
modem operation.
Check other messages for inverter
failure. Determine cause of the
overload and reduce the load. If the
problem cannot be corrected, call
Liebert Global Services.
Perform a UPS start-up procedure
when the conditions causing the
external shutdown have been
corrected. See 3.2.3 - Manual
Restart after Low Battery
Shutdown.
Review other alarms. Remove
condition-causing fault if possible
(e.g., reduce overload). Call Liebert
Global Services if fault cannot be
cleared.
Contact Liebert Global Services
immediately.
If this condition persists the battery
will eventually completely discharge.
Check your electrical wiring. Check
with your utility.
Contact Liebert Global Services
immediately.
Contact Liebert Global Services.
Contact Liebert Global Services.
Operation 53