ABB PowerValue 31/11 T 10 kVA - TROUBLESHOOTING; 7.1 Fault Identification and Rectification; 7.1.1 Troubleshooting without an error message; 7.1.2 Troubleshooting based on error message

4NWP100559R0001_OPM_ABB_PVA31-11-T_10-20kVA_EN_140626 Page 34/37 ABB
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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.
Heat sink Over Temperature Fault
Alarm code:81
Inside temperature of
UPS is too high
Ensure the UPS is not overloaded, the air vents are not
blocked and the ambient temperature is not too high. Wait
for 10 minutes for the UPS to cool down before turning it on
again. If failed, contact the service center.
DC BUS over-voltage
Alarm code:21
UPS internal fault Contact UPS supplier.
DC BUS under-voltage
Alarm code:22
UPS internal fault Contact UPS supplier.
DC BUS unbalanced
Alarm code:23
UPS internal fault Contact UPS supplier.
DC BUS short circuited
Alarm code:24
UPS internal fault Contact UPS supplier.
DC BUS softstart failure
Alarm code:25
UPS internal fault Contact UPS supplier.
INV over-voltage
Alarm code:32
UPS internal fault Contact UPS supplier.