B
attery
-Box LV User Manual
Page 20
A
PPENDIX
2:
COMMON ISSUES DISPLAYED ON
INVERTER AND SOLUTIONS
1 Alarm code displayed on the SRC of SMA sunny island and solution
SMA SRC
Possible causes
Solution
F221
External Alarm-Invalid Bat Type
Reset battery type to "Li" on SRC.
F920(XA01General)
1.AnyB-Plus2.5
has
failed
to
communicate with the BMU;
2.RS485communication
between
the BMU and the B-Plus 2.5 is failed;
1.Check if the RS485 communication
cable has been connected correctly
and tightly
；
2.Check DIP switch setting according
to the setting of DIP switch guidance in
user manual;
3.Change BMU in cabinet
；
F921(XA02DcHiVolt)
External Alarm - Battery High
Voltage
If the red led of the B-Plus 2.5 is on,
please contact the service provider to
change the battery. If not, check the
system setting according to the
guidelines.
F922(XA03DcLoVolt)
External Alarm - Battery Low
Voltage
F923(XA04DcHiTmp)
External Alarm - Battery High Temp
F924(XA05DcLoTmp)
External Alarm - Battery Low Temp
F925(XA06DcHiTmpC)
External Alarm - Battery High Temp
Charge
F926(XA07DcLoTmpC)
External Alarm - Battery Low Temp
Charge
F927(XA08DcHiCur)
External Alarm - Battery High
Current Discharge
F928(XA09DcHiChgCur)
External Alarm - Battery High
Current Charge
F930(XA11Short)
External Alarm - Short circuit
1.Power off;
2.Check if there is short connection of
cable between P+&P-;
3.If short connection is confirmed,
please reconnect cable correctly;
4.restart battery;
F931(XA12Bms)
External Alarm - BMS internal
If the red led of the B-Plus 2.5 is on,
please contact the service provider to
change the battery. If not, check the
system settings according to the
guidelines.
F932(XA13CellBal)
External Alarm - Cell imbalance
F952
External Alarm
–Ext BMS Timeout
1.Check
whether
the
CAN
communication
cable
has
been
