AEG AS-BSL1-4000 Series Installation Manual page 28

6.2.2 Troubleshooting specific faults
Below is a description of possible solutions to
troubleshoot specific faults. If the problem persists,
please contact your installer / distributor.
Fault Description
code
F13 Working
mode change
F18 AC
overcurrent
fault of
hardware
F20 DC
overcurrent
fault of the
hardware
F23 AC leakage
current is
transient over
current
AEG LOW VOLTAGE ENERGY STORAGE UNIT (4 kWH) INSTALLATION MANUAL
Possible solution
Inverter work mode
changed.
1 - Wait for a minute and
check.
2- If the problem persists,
please contact your
installer / distributor
AC side over current fault
1 - Please check whether
the backup load power and
common load power are
within the range;
2 - Restart and check
whether it is in normal;
3 - If the problem persists,
please contact your
installer / distributor
DC side overcurrent fault
1 - Check the connection
between the PV plant and
the storage system.
2 - Turn off the DC switch
and the AC switch. Wait one
minute, then turn on the
DC/AC switch again;
3 - If the problem persists,
please contact your
installer / distributor
Leakage current fault
1 - Check the cable of PV
module and inverter;
2 - Restart the inverter
3 - If the problem persists,
please contact your
installer / distributor
Fault Description
code
F24 DC insulation
impedance
failure
F26 The DC
busbar is
unbalanced
F35 No AC grid
F42 AC line low
voltage
Possible solution
PV isolation resistance is
too low.
1 - Check if the connection
of PV panels and inverter
is tight and correct; Check
whether the PE cable of
inverter is connected to
ground;
2 - If the problem persists,
please contact your
installer / distributor
1 - Please wait for a while
and check whether it is
normal;
2 - If it is still the same, turn
off the DC switch and the
AC switch and wait for one
minute. Then turn on the
DC/AC switch again.
3 - If the problem persists,
please contact your
installer / distributor
No utility
1 - Please check the
grid condition in your
neighborhood.
2 - Check if the switch
between the inverter and
the grid is on or not
3 - If the problem persists,
please contact your
installer / distributor
Grid voltage fault
1 - Check if the AC voltage
is in the range of standard
voltage in specification;
2 - Check whether the grid
AC cables are firmly and
correctly connected
3 - If the problem persists,
please contact your
installer / distributor
EN PD202107 V1-21
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