Troubleshooting; Table 8 Troubleshooting Guide - Liebert GXT3-240TBATTCE User Manual

7.0 T
ROUBLESHOOTING
If any technical problems should occur, check the following before contacting Liebert
support:
• Is the utility voltage present at the UPS input?
• Has the input fuse blown or have the circuit breakers tripped?
• Has the UPS startup procedure been followed correctly?
When contacting Liebert technical support, have the following information available:
• Device model number
• Serial number (from the nameplate)
• Exact description of the problem (what loads are being operated, does the problem occur regularly
or sporadically, etc.)
For descriptions of the indicators mentioned in the following table, see 4.2.1 - Controls and
Messages.
Table 8 Troubleshooting guide
Problem
No display
No alarm
(UPS switched Off)
UPS on LED does not light up,
alarm beeps sound at intervals
UPS on LED does not illuminate
when utility mains voltage present,
acoustic alarm active at intervals
FAULT LED illuminates, alarm
sounding constantly
Battery Run time less than specified
OVERLOAD message displayed
No communication between UPS
and PC
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Possible Cause
Utility mains switched off
No mains voltage present
Input fuse blown or input
circuit breaker tripped
No utility mains voltage
present
Input fuse defective or input
circuit breaker tripped
UPS error
Overheating
The battery breaker is open,
in the OFF position
Batteries are not fully charged
Batteries are defective
Charging device is defective
Overload at UPS output
Wrong serial connection
cable
Interface on the PC is being
used by another process or is
defective
Interference on the data cable
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Switch on utility breaker
Have utility mains inspected by a qualified
technician
Replace with fuse of same type or switch on circuit
breaker. If the problem persists, contact technical
support.
Have utility mains inspected by a qualified
technician
Replace with fuse of same type or switch on circuit
breaker. If the problem persists, contact technical
support
Contact technical support
Decrease ambient temperature
Move the battery breaker to the ON position
Charge batteries (see Battery Test on page 19)
and test backup time. If the problem persists,
contact technical support.
Contact technical support
Contact technical support
Reduce load to the permissible value
Check whether the correct cable has been used
(standard modem/null modem cables are not
permissible)
Check whether other software/service is accessing
the interface on the PC; try selecting a different
serial interface
Lay cable differently/Reinstall cabling
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Troubleshooting

® technical
Solution