Alpha ESS T100 - Troubleshooting System Faults; 7.1 Battery & BMS Faults

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Alpha ESS Co., Ltd.
Page 43 of 45
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7. Troubleshooting
Battery and BMS troubleshooting
Error Type
Alarm
Displayed in EMS
Processing method
Cell temperature different fault
Cell-Temp-Diff
Contact with Alpha service
Balancer fault
Balancer Err
Contact with Alpha service
Module charge over current
fault
Chrg-Ov-Curr
Contact with Alpha service
Module discharge over current
fault
Disch-Ov-Curr
Contact with Alpha service
Pole over temperature fault
Pole-Ov-Temp
Contact with Alpha service
Cell over volt fault
Cell-Ov-Volt
Contact with Alpha service
cell volt different fault
Cell-Volt-Diff
Contact with Alpha service
cell discharge under
temperature fault
Disch-Low-Temp
Contact with Alpha service
Cell under volt fault
Cell-Low-Volt
Contact with Alpha service
Insulation resistan fault
IR_Fail
Cut off BMS at the first, then operate
in power sequence when power the
system
LMU Communication fault
Commu_fail_LMU
Check communication connection
between batteries (LMU and LMU),
battery and HV900112 (LMU and
BMU)
Cell over temperature fault
Cell-Ov-Temp
Contact with Alpha service
BMU Communication fault
Commu_fail_BMU
Check communication cable between
HV90012s (BMU and BMU), also
HV900112 and TOP BMU Box (BMU
and TOP BMU)
Cell charge under temperature
fault
Chrg-Low-Temp
Contact with Alpha service
Wire beam fault
Wire-Harness-Err
Contact with Alpha service
Relay fault
relay Err
Cut off BMS
Temperature sensor fault
Temp-Sen-Err
Contact with Alpha service
Emergency Handling Plan
In order to prevent accidents such as electric shock, fire or explosion, the emergency
switch should be pressed immediately to stop the equipments when abnormal sound, smell
or sparks is found.