885-0142 AES CAB BCU Modbus Communication Protocol

Appendix 16. Maintenance Alarm Code 1

Alarm Category

Alarm name

Alarm code

Bit

Comment

Maintenance Alarm 1

SBMU hardware failed

0x00000001

Bit 0


SBMU battery wiring failed

0x00000002

Bit 1


SBMU communication failed

0x00000004

Bit 2


Temperature wiring failed

0x00000008

Bit 3


Main negative relay failed

0x00000010

Bit 4


Main positive relay failed

0x00000020

Bit 5


Pre-charge fault

0x00000040

Bit 6


Fuse failure

0x00000080

Bit 7


Emergency stop

0x00000100

Bit 8


Current loop failed

0x00000200

Bit 9


Get total voltage failed

0x00000400

Bit 10


Abnormally high single-cell voltage

0x00000800

Bit 11


Very high voltage for a single cell

0x00001000

Bit 12


Very low voltage for a single cell

0x00002000

Bit 13


Very high temperature

0x00004000

Bit 14


Relay-controlled

0x00008000

Bit 15


Maintenance Alarm 1

High differential voltage between packs

0x00010000

Bit 16


Communication error with SBAU

0x00020000

Bit 17


Communication error with EMS

0x00040000

Bit 18


EMS/PCS forced control

0x00080000

Bit 19


Communication error with PCS

0x00100000

Bit 20


Communication error with the display

0x00200000

Bit 21


Fan failure

0x00400000

Bit 22


Insufficient number of packs

0x00800000

Bit 23


EMS emergency stop

0x01000000

Bit 24


EMS high voltage

0x02000000

Bit 25


Initialization blocked

0x04000000

Bit 26


Maintenance charging

0x08000000

Bit 27


Get High Voltage Box temperature fault

0x10000000

Bit 28


Passive balancing fault

0x20000000

Bit 29


Active balancing fault

0x40000000

Bit 30


SBCU-QF circuit breaker failure

0x80000000

Bit 31