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9.4 Normal alarm display on the BMU of B-BOX and the solution
LED of the BMU
Reason
Solution
Flash 1 time
Inverter and BMU communication failure
1.Inspect whether the CAN communication
cable has been connected correctly and
reliability
2.Change BMU in cabinet
；
Flash 2 times
Battery not found
Check whether the BMU and first battery are
connected properly
Flash 3 times
Cell not found
Check the battery SOC LEDs is
merry-go-round, check if the communication
cable and the address of the corresponding
battery are set correctly.
Flash 4 times
Any battery failure
Check if the battery light stays lightening, and
if so, please contact your installer to replace
the battery.
9.5 Normal alarm display on B-Plus 2.5 and solution
B-Plus display info
Reason
Solution
LED
Yellow led(Alarm) blinks for 0.5Hz, other
LEDs are off ;
Battery is switched
off abnormally
Press ON/OFF button for 2-3 seconds to
restart the battery, if the battery cannot be
resumed, contact the service provider;
The merry-go-round (10s cycle)
Communication
connection timeout
Check the communication cable
1/3 and 2/4 is blinking
Update status
If not update the firmware, reset the
battery.
Yellow led (Alarm) is normally on
1. press on/off button for 1S and release,
hear a short buzzer sound;
2.run lights stay lit, ALM LED is
1time
Under voltage
(BAT or CELL)
Automatically resume
2times
Over charge
Automatically resume
