NCR 4072 - Silencing an Audible Alarm; Site Wiring Fault (120 V Models Only)

Troubleshooting
44
NCR 4072 UPS Site Preparation, Installation, and Operation Manual S 05147374 Rev C Uncontrolled Copy
Silencing an Audible Alarm
Before silencing an alarm, check the alarm condition and perform the
applicable action to resolve the condition (see Table 9). To silence the
alarm for an existing fault, press the
button. If UPS status changes,
the alarm beeps, overriding the previous alarm silencing. The alarm d oes
not silence if there is a UPS fault, low battery condition, or if the battery
needs to be replaced.
Site Wiring Fault (120V Models Only)
The Site Wiring Fault indicator on the UPS rear panel illuminates if the
ground wire connection does not exist or the line and neutral wires are
reversed in the line receptacle. This indicator stays on until the condition
is resolved. Have a qualified electrician correct the wiring fault. The UPS
operates when the indicator is illuminated, but does not provide rated
noise and surge suppression.
Table 9. Troubleshooting
Alarm or Condition Possible Cause Action
The indicator is not on;
theUPSdoesnotstart.
µ
The power cord is not
connected correctly.
Check the power cord connections.
t
h
e
U
P
S
d
o
e
s
n
o
t
s
t
a
r
t
.
The UPS is in Standby
mode.
Press and hold the button until you hear the
UPS beep (approximately two seconds) to
supply power to the connected equipment.
Thewalloutletisfaulty. Have a qualified electrician test and repair the
outlet.
The UPS operates in Battery
mode only, even though
normal utility power is present.
The input overcurrent
protector is open (120V
models only).
Save your work and turn off your equipment.
Turn off the UPS. Reduce the load, then press
the input overcurrent protector on the UPS rear
panel.
TheUPSdoesnotprovidethe
expected backup time.
The batteries need
charging or service.
Plug the UPS into a power outlet for 24 hours to
charge the battery. Press the button, if the
alarm beeps, see “Replacing Batteries” on
p
a
g
e
3
4
t
o
r
e
p
l
a
c
e
t
h
e
b
a
t
t
e
r
y
page 34 to rep
l
ace t
h
e
b
atter
y
.
During extended power outages, turn off the
UPS after saving your work and shutting down
your computer to conserve battery power.