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UPS troubleshooting:
NOTE: Troubleshooting procedures may differ depending on UPS model.
Back-UPS troubleshooting
UPS will not turn on (lamp within power I/O switch is not illuminated), but beeps when power I/O switch is on
Line cord plug is loose.
Rear panel circuit breaker is tripped.
Dead wall socket.
Lamp inside the I/O switch is blown.
Building wiring error such as missing ground, hot and neutral polarity
reversal, or overloaded neutral wiring.
"Cheater" plug or adapter installed onto line cord plug (ground not
connected).
The UPS is briefly transferring your equipment to its alternate power
source due to utility voltage sags or spikes.
UPS emits a beep very often, more than once or twice and hour. Computer equipment operates normally
Utility voltage is distorted or branch circuits are heavily loaded.
UPS emits loud tone. Power I/O 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.
C B M _ O T Q G _ B U 3 _ 2 0 1 1 0 8 0 9 V 0 2
Problem:
UPS operates normally, but I/O switch not illuminated)
The UPS operates normally, but the site wiring fault indicator is lit
UPS occasionally emits a beep, computer equipment operates normally
Check fitting of line cord plug.
Circuit breaker is tripped when button is extended. Unplug excessive loads
and reset breaker (press button).
Check wall socket with a table lamp.
You may continue to use the UPS. It is recommended that the UPS is
serviced.
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.
Plug the UPS into 2 pole, 3 wire grounding outlet only.
This operation is normal. The UPS is protecting your computer equipment
from abnormal utility voltages. If the audible alarm becomes annoying, refer
to Option Switch 'AUDIO SETTING' section to mute the beeping sound.
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. Refer to Option Switch 'UTILITY TRANSFER VOLTAGE' section and
lower the transfer voltage if it is known that your equipment will operate
normally at that voltage.
Turn off UPS and unplug excessive loads. Laser printers will overload the
UPS and should be plugged into a quality surge suppressor. Once overload
is removed, reset the circuit breaker (press the button).
Solution:
Page 3
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