44
Conditions
Possible cause
Action
Back feed
Fault (Red) LED is On.
Beep continuous.
Code: F093
UPS has a unexpected bypass
current on battery mode
Transfer to maintenance bypass and
call service.
Inv Overload Fault
Fault (Red) LED is On
Beep continuous.
Code: F042
UPS has transferred to bypass or
fault mode because of overload
in inverter mode
The UPS transfers to Battery mode if
supporting the load.
Remove some of the equipment
from the UPS
Byp Overload Fault
Fault (Red) LED is On.
Beep continuous.
Code: F043
UPS has cut off the output and
transferred to fault mode
because of overload in bypass
mode or HE mode.
Remove some of the equipment
from the UPS
Output Short Circuit
Fault (Red) LED is On.
Beep continuous.
Code: F031
Indicates that the UPS has
detected abnormally low
impedance placed on its output
and considers it a short circuit
Remove all the loads. Turn off the
UPS.
Check if UPS output and loads is
short circuit.
Ensure short circuit is removed
before turning on again.
Fan Failure
Fault (Red) LED is flash
1 beep every 1 second
Code: A085
Indicates that the fan could not
work normally
Check fans of UPS
BUS Over Voltage
Fault (Red) LED is On.
Beep continuous.
Code: F021
Indicates that the UPS get BUS
over voltage fault because of
BUS.
The UPS transfers to Bypass mode if
supporting the load
BUS Under Voltage
Fault (Red) LED is On.
Beep continuous.
Code: F022
Indicates that the UPS get BUS
under voltage fault
The UPS transfers to Bypass mode if
supporting the load
BUS Unbalance
Fault (Red) LED is On.
Beep continuous.
Code: F023
Indicates that the positive BUS
voltage and negative BUS voltage
are too lopsided to fault
The UPS transfers to Bypass mode if
supporting the load
BUS Short
Fault (Red) LED is On.
Beep continuous.
Code: F024
Indicates that the BUS voltage
decrease very fast
Contact your service representative
Summary of Contents for Tacoma II Series
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