Soluna S12 EU-A36, User Manual, Page: 51 / 53

51 / 53
7.2 The followings are common methods of troubleshooting.
If problem haven
’t been solved, Please contact Soluna.
Table-2
Error code Description Solutions
F13
Working mode
change
Inverter work mode changed
1
）
wait for a minute and check.
2
）
Seek help from us, if can't go back to normal
state.
F18 AC over current
fault of hardware
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
）
Seek help from us, if cannot go back to normal
state.
F20 DC over current
fault of the
hardware
DC side over current fault
1) Check PV module connect and battery connect;
2) Turn off the DC switch and AC switch and then
wait one minute, then turn on the DC/AC switch
again;
3) Seek help from us, if cannot go back to normal
state.
F23
AC leakage current
is transient over
current
Leakage current fault
1) Check the cable of PV module and inverter;
2) Restart inverter;
3) Seek help from us, if cannot go back to normal
state.
F24 DC insulation
impedance failure
PV isolation resistance is too low.
1) Check the connection of PV panels and inverter
is firmly and correctly; Check whether the PE
cable of inverter is connected to ground;
2) Seek help from us, if cannot go back to normal
state.
F26
The DC busbar is
unbalanced
1) Please wait for a while and check whether it is
normal;
2) If still same, and turn off the DC switch and AC
switch and wait for one minute and then turn on
the DC/AC switch;
3) Seek help from us, if cannot go back to normal
state.
F35 No AC grid
No Utility
1) Please confirm grid is lost or not; Check the grid
connection is good or not;