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7.0 Difficulty
7.1 Troubleshooting chart
PROBLEM POSSIBLE CAUSE ACTION TO TAKE
UPS will not turn on (lamp within
power I/0 switch is not illuminated),
but beeps when power I/0 switch
is on.
1. Line cord plug is loose. 1. Check fit of line cord plug.
2. Rear panel circuit breaker is
tripped.
2. Circuit breaker is tripped when
button is extended. Unplug
excessive loads and reset breaker
(press button).
3. Dead wall socket. 3. Check wall socket with a table
lamp.
UPS operates normally, but SITE
WIRING FAULT indicator is
illuminated.
1. Building wiring error such as
missing ground, hot and neutral
polarity reversal, or overloaded
neutral wiring.
1. A qualified electrician should be
summoned to correct the building
wiring. The UPS will not provide
rated noise and surge suppression
with incorrect building wiring.
2. "Cheater" plug or adapter
installed onto line cord plug (ground
not connected).
2. Plug the UPS into 2 pole, 3 wire
grounding outlet only.
UPS occasionally emits beep,
computer equipment operates
normally.
The UPS is briefly transferring your
equipment to its alternate power
source due to utility voltage sags or
spikes.
This operation is normal. The UPS
is protecting your computer
equipment from abnormal utility
voltages. If the audible alarm
becomes annoying, set option
switch #1 to the up position.
UPS emits beep very often, more
than once or twice an hour.
Computer equipment operates
normally.
Utility voltage is distorted or branch
circuits are heavily loaded.
Have your line voltage checked by
an electrician. Operating your UPS
from an outlet which is wired to a
different branch fuse or circuit
breaker may help. Adjust transfer
voltage via option switches #2 or
#3 if it is known that your equipment
will operate normally at the utility
voltages given in section 5.5.
UPS emits loud tone. Power I/0
switch is on but computer
equipment is not powered. UPS’s
rear panel circuit breaker is tripped
(button is extended). Normal utility
voltages are known to be present.
UPS has shut down due to severe
overload.
Turn off UPS and unplug excessive
loads. Laser printers will overload
the UPS and should be plugged into
a quality surge suppressor. See
the section covering Overloads.
Once overload is removed, reset
the circuit breaker (press button).