ABB PowerValue 11/31 T, Operating Manual

Page: 43 / 62

Modifications reserved
Page 42/49
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 POSSIBLE CAUSE REMEDY
No indication, no
warning tone even
though system is
connected to mains
power supply
No input voltage Check the building wiring and input
cable.
Check if the input breaker is closed.
Bypass LED ON even if
the power supply is
available
Inverter not
switched on
Press power-on button to turn on
UPS.
Battery LED ON and
audible alarm sounding Input voltage and/or
frequency out of
tolerance
Check input power source.
Check the building wiring and input
cable.
Check if the input breaker is closed.
Emergency supply
period shorter than
nominal value
Batteries not fully
charged / batteries
defect
Charge the batteries for at least 12
hours and then check capacity.
7.1.2 Troubleshooting based on error message
MESSAGE DISPLAYED POSSIBLE CAUSE REMEDY
Inv Overload Failure
Alarm code:42
Overload
Check the loads and remove non-
critical loads.
Check if some loads have failures.
Byp Overload Failure
Alarm code:43 Overload Check the loads and remove non-
critical loads.
Check if some loads have failures.
Output short-circuit
Alarm code:31 Short circuited
output
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.