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Chapter 11 Troubleshooting
Alarms and faults (continued)
Condition
UPS over temperature
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.
168
Possible cause
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.
Action
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.
6U Rack or Tower UPS RT8kVA and RT11kVA IUOMG
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