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Conditions
Power overload
LED is On.
Beep continuous.
UPS overtemperature
LED is On.
1 beep every 3 seconds.
At the warning level, the
UPS generates the alarm
but remains in the current
operating state.
If the temperature rises
another 10°C, the UPS
transfers to Bypass mode
or shuts down if Bypass is
unusable.
The UPS does not start.
Input wiring bad / Output
wiring bad
LED is On.
Beep continuous.
MBP disconnected
Possible cause
Power requirements exceed
UPS capacity (greater than 100% of
nominal; see Appendix A "UPS model
specifications" on page 45 for specific
output overload ranges).
The UPS internal fan has failed.
A utility power failure has occurred, an
upstream circuit breaker is tripped, or the
input power cord (if so wired) is unplugged.
The Remote Power Off (RPO) switch is
active or the RPO connector is missing.
Input/Output cables are not connected to
the correct terminal blocks.
The HotSwap MBP is not detected.
Action
the
Remove some of the equipment from the
UPS.
The UPS continues to operate, but it might
switch to Bypass mode or shut down if the
load increases.
The alarm resets when the condition
becomes inactive.
If the UPS transferred to Bypass mode,
the UPS will return to normal operation
when the temperature drops 5°C below
the warning level.
If the condition persists, shut down the
UPS.
Clear vents and remove any heat sources.
Allow the UPS to cool. Ensure the airflow
around the UPS is not restricted. Restart
the UPS.
If the condition continues to persist,
contact your service representative.
Check utility power, circuit breakers, and
input connections.
If the UPS Status menu displays the
"Remote Power Off" notice, inactivate the
RPO input.
Check wiring connections and ensure that
all Input/Output cables are connected
correctly -- for example, neutral-to-neutral
and ground-to-ground.
If the HotSwap MBP is connected to the
UPS, check that the detection connector
is correctly plugged.
Chapter 8
41
.
Troubleshooting
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