6 TROUBLESHOOTING
This is the basic troubleshooting guide and required actions for maintaining the Liebert APS system.
6.1 Active Alarms
In the event of an alarm, the user-interface display displays the latest alarm message. A list of possible
alarm messages are described in Table 6.1 below. If an alarm occurs and you are uncertain of the
corrective action to take, contact your local Vertiv™ representative.
ALARM
MESSAGE
POSSIBLE CAUSE
CORRECTIVE ACTION
Power
Module
Warning
One or more power modules is not operating correctly.
View the corresponding module serial number in the fault logs or
event logs and contact your local Liebert Services
representative.
Power
Module Fail
One or more power modules has a fault.
View the corresponding module serial number in the fault logs or
event logs and either replace the module or contact your local
Liebert Services representative.
Power
Module
Over Temp
Warning
One or more power modules is operating at an internal high
temperature.
Check the air filters located behind the bezels and clean if
necessary, or check to see if the ambient temperature is too
high. If these conditions do not exist, contact your local Liebert
Services personnel.
Power
Module
Over Temp
Shutdown
One or more power modules has stopped operating due to an internal
over temperature.
Check the air filters located behind the bezels and clean if
necessary, or check to see if the ambient temperature is too
high. If these conditions do not exist, contact your local Liebert
Services representative.
Power
Module Fan
Failure
One or more of the power module fans has failed.
Check to see if the fan is blocked. If not, contact your local
Liebert Services representative.
Insufficient
Capacity To
Start Inverter
The load value exceeds the maximum load capacity of all operating
modules.
Ensure all power modules are inserted and the locking lever is
fully inserted. If all modules are active, add power modules to
increase capacity or contact your local Liebert Services
representative.
PM Locking
Lever In
Remove
Position
The power module locking lever is not in the locked position.
Check the locking lever to ensure it is fully inserted. If so,
contact your local Liebert Services representative.
Input Phase
A Not
Qualified
A-phase voltage is too high or too low.
Check the upstream feeder breaker or the UPS input breaker
and reset if necessary, or contact your local Liebert Services
representative.
Input Phase
B Not
Qualified
B-phase voltage is too high or too low.
Check the upstream feeder breaker or the UPS input breaker
and reset if necessary, or contact your local Liebert Services
representative.
Input Phase
C Not
Qualified
C-phase voltage is too high or too low.
Check the upstream feeder breaker or the UPS input breaker
and reset if necessary or contact your local Liebert Services
representative.
L1L2 Phase
Reversed
Two phases are reversely connected.
Have a qualified electrician check the phase rotation at the
distribution panel and/or at the UPS input terminal block. If this is
not the problem, contact your local Liebert Services
representative.
Battery
Reversed
The battery is reversely connected.
Have a qualified electrician check the wiring rotation at the
external battery cabinet. If this is not the problem, contact your
local Liebert Services representative.
Table 6.1 Alarm message list
Vertiv
| Liebert® APS™ Installer/User Guide |
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Summary of Contents for Liebert APS series
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