Troubleshooting; Fault Identification And Rectification; Troubleshooting Without An Error Message; Troubleshooting Based On Error Message - ABB PowerValue 11/31 T Operating Manual

7

Troubleshooting

7.1 Fault identification and rectification

Alarm and events identify warning situations and notify errors or potential failures of the system. The
output of the UPS is not necessarily affected in case of an alarm but taking the correct actions may
prevent loss of power to the load. If the UPS system does not operate correctly, attempt to solve the
problem using the table below.
7.1.1

Troubleshooting without an error message

MESSAGE DISPLAYED
No indication, no
warning tone even
though system is
connected to mains
power supply
Bypass LED ON even if
the power supply is
available
Battery LED ON and
audible alarm sounding
Emergency supply
period shorter than
nominal value
7.1.2

Troubleshooting based on error message

MESSAGE DISPLAYED
Inv Overload Failure
Alarm code:42
Byp Overload Failure
Alarm code:43
Output short-circuit
Alarm code:31
Modifications reserved
Page 42/49
POSSIBLE CAUSE
No input voltage
Inverter not
switched on
Input voltage and/or
frequency out of
tolerance
Batteries not fully
charged / batteries
defect
POSSIBLE CAUSE
Overload
Overload
Short circuited
output
REMEDY
Check the building wiring and input
cable.
Check if the input breaker is closed.
Press power-on button to turn on
UPS.
Check input power source.
Check the building wiring and input
cable.
Check if the input breaker is closed.
Charge the batteries for at least 12
hours and then check capacity.
REMEDY
Check the loads and remove non-
critical loads.
Check if some loads have failures.
Check the loads and remove non-
critical loads.
Check if some loads have failures.
Remove all the loads. Turn off the
UPS.
Check if UPS output and loads are
short-circuited.
Ensure short circuit is removed before
turning on the system again.