ABB ACS880 Firmware Manual page 178

178 Fault tracing
Code Fault
(hex)
3E08 LSU charging
3E09 Charging count
3E0A LSU charging busbar
fault
3E0F Synchronization
4E03 Excess temperature
Cause
DC link voltage is not high
enough after charging.
1 Voltage rise is not
acceptable.
2 DC voltage level is not
acceptable.
4 Charging time is too high.
5 After closing the charging
contactor, the voltage did
not rise above 10% from
nominal voltage in 0.2
seconds (can be set in
service level).
8 Parameter 120.28 MCB relay
timing is set too high. The DC
voltage drops too low.
There are too many DC link
charging attempts.
The DC voltage rise in 10 ms
is not acceptable during
charging. The level is below
the value set in parameter
120.26 Maximum dU/dt, but
DC voltage has not reached
the level set in parameter
120.25 MCB closing level.
Synchronization to supply
network has failed.
Supply module heat sink
temperature is excessive due
to eg. module overload, fan
failure or heatsink sensor.
(Control program generates
first a warning, then a fault.)
What to do
Check the supply and fuses.
Check the event log for an auxiliary
code. The auxiliary code identifies the
event (see below). Check external
charging tuning parameters
120.23...120.50.
Check the connection from the relay
output to the charging contactor.
Check that the DC voltage measuring
circuit is working correctly.
Check parameter 120.26 Maximum
dU/dt.
Check supply connection.
Check parameter 195.01 Supply
voltage and parameter
closing level.
Check supply connections, voltage of
power supply network and PSL2 link
cable.
Check the supply connection, and
power unit must be externally
powered to measure voltage.
Check parameter 120.28 MCB relay
timing.
Two attempts in five minutes is
allowed to prevent charging circuit
overheating.
Check the connections of the DC
capacitors in the power modules and
the parameters 120.25 MCB closing
level and parameter 120.26 Maximum
dU/dt.
Check possible network asymmetry.
Check the auxiliary code to identify the
diode supply unit (15: single diode
supply unit or the first parallel-
connected diode supply unit, 16: the
second parallel-connected diode
supply unit).
If the fault persists, contact your local
ABB representative.
See AE14 Excess temperature
166).
120.25 MCB
(page