Frequently asked questions
常见问题

The main board reports a “Type II fault”, possibly due to replacing the fire code board or not resetting after startup.
Solution: Manually reset with the following command:
enable control → write enable → enter
主板报 “二般故障”，可能因更换消防编码板或主板重启后未复位。
解决方法：通过以下指令手动复位：
enable control → write enable → enter

No alarm from the main board, but BAU shows alarm — indicates a pre-warning. Likely caused by no power to fire board or abnormal auxiliary voltage.
Solution: Check fire board power supply and verify auxiliary voltage is stable.
主板无报警，但BAU报警表示设备预警，可能是消防主板未上电或辅助电电压异常。
解决方法：检查消防主板供电情况，确认辅助电压是否正常。

Main board reports ground fault due to abnormal system grounding.
Solution: Check the ground wire connection from the fire board or system.
主板报接地故障，系统接地异常。
解决方法：检查消防主板接地导线或系统地线连接是否良好。

Detector LED off, no trigger. Caused by wiring issues or faulty detector (e.g., smoke, heat, gas).
Solution: Test power and signal lines, replace damaged detectors if needed.
探测器灯不亮、触发无反应，可能是线路断路或探头损坏。
解决方法：检查供电和通讯线路是否导通，更换故障探头。

Explosion-proof fan fails to start due to control signal error, power loss, or fan failure.
Solution: Check fan power, wiring, communication, and replace fan if necessary.
防爆风扇不启动，可能是控制信号出错、断电或风扇损坏。
解决方法：检查供电、控制信号、通讯线路，必要时更换风扇。

EXIING line reports error due to incorrect number of diodes (series or parallel).
Solution: Verify diode quantity and wiring, ensure correct configuration.
EXIING串并联二极管数量不对导致报警。
解决方法：检查并重新配置二极管的数量和连接方式。

BAU alarms but main board has no protection. Could be caused by solar detector fault.
Solution: Check BAU temperature sensors, replace or repair faulty parts.
BAU报警但主板无动作，可能是太阳能射窗探测器故障。
解决方法：检查主板和探测器温度状况并及时更换。

BMS triggers fire alarm at -27V when spraying starts — indicates diode not connected.
Solution: Ensure a diode is connected in series before allowing spray trigger.
喷发时检测电压为-27V，未连接二极管导致误报警。
解决方法：必须接入一组二极管才可触发喷发，避免误报。

Battery room temperature too high due to air conditioner failure or compressor not starting.
Solution: Check power and status of air conditioner and compressor. Replace if needed.
电池舱温度过高，可能是空调压缩机未启动或损坏。
解决方法：检查空调电源、启动状态，确认压缩机是否正常，必要时更换。

Battery room temperature too high due to air conditioner malfunction.
Solution:

1. Check air conditioner power supply

2. Clean filters, verify cooling medium and compressor startup

3. Check temperature setting range

4. Restart air conditioner and test again
   电池舱温度过高，空调制冷异常。
   解决方法：
   1）检查空调供电正常
   2）检查清洗空调滤网，补充空调冷却介质，空调压缩机是否启动
   3）检查空调温度设置范围正常
   4）重启空调测试

Battery room overheating due to liquid cooling system malfunction.
Solution:

1. Check liquid cooling power supply

2. Check liquid pressure and return lines for proper operation and no leakage

3. Confirm cooling strategy and setpoint range

4. Restart liquid cooling system and test again
   电池舱温度过高，液冷机制冷异常。
   解决方法：
   1）检查液冷供电正常
   2）检查液冷压力正常，液冷管道回路正常不漏液
   3）检查液冷机运行策略正常，温度设置范围正常
   4）重启液冷机测试

Cooling system shows low pressure; visible coolant leakage.
Solution:

1. Check for leaks at joints and liquid cooling plate ends

2. Observe coolant overflow and determine cause (e.g., loosened fitting or damage)

3. Re-tighten and reseal leaking points

4. Refill coolant and verify normal pressure
   可以看到液体溢出，液冷回路没有锁紧。
   解决方法：
   1）检查漏液部位，主要为各对接处、液冷板端子
   2）观察漏液现象，为松懈或是破损
   3）重新加固或更换，并清理漏液
   4）去液冷机各用水箱补充液体，至正常压力值

PCS overheat, fan not spinning. Likely caused by power or signal communication issue.
Solution:

1. Use PCS door diagram to check fan and power circuit

2. Check fan power and control circuit

3. Replace or test fan
   PCS舱风扇不转，可能为物理通讯链路问题。
   解决方法：
   1）根据PCS门上图纸检查PCS与风扇供电回路是否正常
   2）检测风扇供电电压是否正常
   3）更换风扇测试

Description:
PCS alarm, stops running. Likely due to AC or DC power supply fault, or EMS communication failure.
PCS报警，停止工作，大概率交流端或者直流端供电故障。

Solution:

1. Check alarm logs on screen

2. Use multimeter to test AC and DC voltages

3. Check EMS communication status

4. If AC/DC recovers, PCS should recover; otherwise, reboot PCS

5. Check DC switch contact and connection integrity
   1）查看屏幕报警记录
   2）用万用表检测AC以及DC侧电压是否正常
   3）检查EMS通讯报警
   4）AC/DC正常后PCS会恢复正常，若不能可尝试重启PCS
   5）检查电源开关、端子是否良好

Description:
PCS has switching fault.
PCS内部模块状态异常。

Solution:

1. Check PCS startup sequence and delay logic

2. Check switching relay contacts

3. Replace faulty components
   1）检查PCS启动逻辑，是否由于模块延迟
   2）检测继电器触点、端子是否良好
   3）更换模块

Description:
No output, but not in alarm; DC voltage setpoint too low.
无报警，但无法输出功率，可能是DC电压阈值设置太低。

Solution:

1. Check and adjust setting → DC → top charge vol
   1）PCS设置DC电压阈值：setting → DC → top charge vol

Description:
PCS and EMS communication is abnormal; data is not updated in real-time.
PCS与EMS通信异常，数据未实时刷新。

Solution:

1. Check communication cable between PCS and EMS, and check switch/router status

2. Use EMS diagnostic tools to check PCS communication service

3. Reboot PCS, then EMS

4. Restart the abnormal network communication devices
   1）检查PCS至EMS通信线缆、交换机和转换器状态
   2）用EMS自带网络状态监测工具检查PCS通信服务状态
   3）应先启动PCS，再启动EMS设备
   4）重启异常网络通信设备

Description:
SOC deviation among battery strings keeps increasing; typically occurs in multi-string scenes with incorrect dispatch mode.
多簇电池的SOC越来越不一致，只出现在多支路场景，未设置PCS功率模式为按各簇调节。

Solution:

1. Go to PCS settings

2. Access the system menu

3. Set dispatch mode to: String dispatch + one by one
   1）点击设置
   2）点击系统
   3）模式为：String dispatch + one by one

Description:
SOC display is reversed or inconsistent; installation order mismatch.
充放电显示相反，SOC与系统实际不符，只出现在多支路场景，安装时电池簇顺序与PCS支路顺序错位。

Solution:

1. Check string PDU wiring order

2. Confirm PCS string configuration strictly matches physical connection

3. Adjust cable layout if mismatch
   1）检查电池簇的PPDU顺序
   2）检查PCS多支路接线母排的顺序
   3）电池簇PDU与多支路母排顺序要严格对应

Description:
AC phase order alarm; PCS and grid phase mismatch.
报AC电序颠倒/频率过低故障，AC侧UVW三相相序错乱，电网与PCS相序不符。

Solution:

1. Use phase meter to verify that grid phase is UVW to L1L2L3

2. If incorrect, adjust wiring until PCS matches

3. Save and reboot PCS
   1）用相序表检测AC电相序应为UVW对应L1L2L3
   2）调换任意两相，使其相序与PCS相符
   3）重新安装后重启

Description:
Unbalanced power or parameter deviation among the three phases; may not trigger alarm but causes efficiency issues.
运行参数（功率控制精度、谐波、三相功率不平衡）偏高但未触发告警。

Solution:

1. Check PCS internal signals and software decoding; rule out hardware faults

2. Regularly inspect for parameter drift

3. Check internal communication between signal lines

4. Confirm AC side voltage is stable

5. Verify three-phase AC supply is normal

6. Use an oscilloscope to check voltage, current waveform if needed
   1）检查控制器内部信号及故障码，判断是否内部元件故障
   2）定期观察运行参数是否渐进式劣化
   3）检查系统内部电压/电流传感器内部信号连接线缆
   4）检查电压电流检测精度
   5）检查供电三相电源良好
   6）必要时可测变流器交流直流两侧电压、电流波形

Description:
AC power supply voltage is unstable, spikes detected.
AC侧供电电压不稳定，瞬时跳变。

Solution:

1. Verify actual fault voltage using oscilloscope at the busbar

2. Use oscilloscope or RMS meter to capture real-time voltage

3. If caused by grid feedback, wait for voltage recovery
   1）核实故障出现时母线实际电压
   2）必要时用示波器捕捉实际电压
   3）与电网反馈问题，核实电压，待其恢复正常

Description:
Detected grounding or insulation abnormality.
接地或绝缘检测异常。

Solution:

1. Check whether grounding is reliable, verify grounding resistance

2. Use insulation meter to measure DC side insulation resistance
   1）检查接地是否连接可靠，接地电阻值是否正常
   2）用绝缘检测仪测量变流器直流侧绝缘电阻

Description:
AC circuit breaker trips, indicating fuse burn or short circuit.
交流侧断路器跳闸，保险丝熔断。

Solution:

1. Shut down the entire system

2. Check whether the AC circuit breaker loop is normal

3. Verify actual fuse/cable/relay match with installation

4. Reinstall matched fuses and restart system
   1）关闭整个系统
   2）检查交流测断路器回路是否正常
   3）核实实际电流与安装的电缆及保险丝及断路器是否匹配
   4）匹配后重新安装，重启系统

Description:
Battery-side PDU breaker trips due to internal battery fault.
电池测PDU断路器跳闸，电池侧内部问题。

Solution:

1. Turn off the PCS DC breaker

2. Check battery pack and status

3. Restore battery voltage if normal, reboot PCS

4. Close PCS DC breaker again
   1）关闭PCS的直流侧断路器
   2）检查电池簇和电池状态
   3）电池测恢复正常后，重启电池侧
   4）闭合PCS的直流侧断路器

Description:
Main circuit or component is overheating, burning, melting, or emitting noise or odor.
主回路某处或组件高温过载、融化、起火燃烧等。

Solution:

1. Immediately shut off system power and disconnect all electrical connections

2. After 30 minutes of shutdown, open the busbar cabinet to inspect

3. Photograph and record fault location

4. If serious, initiate emergency plan and call for external support

5. Use dry powder or CO₂ fire extinguisher; do not use water

6. Preserve the site and wait for next steps
   1）立即关闭系统供电，切断系统各处电气连接
   2）PCS在停止30 min后方可打开接线母排柜门
   3）检查异常部位情况，拍照及视频记录
   4）情况严重紧急时第一时间呼救，寻求外界帮助
   5）检查风冷装置，采用必要措施，用干粉或二氧化碳灭火，禁止采用水灭火
   6）保护现场，等待下一步救援

Description:
Some battery strings lose communication.
部分簇数据通讯丢失。

Possible Cause:
Cable disconnection or PDU address misconfiguration.
疑问线束问题或PDU拨码/地址不正确。

Solution:

1. Check if communication wiring is secure

2. Confirm PDU dial settings and address sequence

3. Verify firmware version of the failed PDU matches others

4. Reboot the system after corrections
   1）检查通讯线束良好
   2）检查丢失簇的PDU拨码及地址顺序正确
   3）检查PDU固件版本是否与其他PDU一致
   4）纠正后重启系统

Description:
BMS and EMS communication is abnormal; data is not updating in real-time.
BMS与EMS通信异常，数据未实时刷新。

Possible Cause:
Likely communication link failure.
大概率物理通讯链路问题。

Solution:

1. Check BMS to EMS communication cable and network equipment

2. Use EMS tool to check BMS communication service status

3. Restart BMS first, then EMS

4. Restart affected network device
   1）检查BMS至EMS通信线缆、网络交换机供电和转换器状态
   2）采用EMS自身网络状态监测工具检查BMS通信服务状态
   3）应先启动BMS，再启动EMS设备
   4）重启异常网络通信设备

Description:
BMS voltage or temperature signal reads incorrectly.
BMS电压、温度信号采集错误。

Possible Cause:
Likely physical wiring failure, e.g., loose plugs, pin dropouts.
大概率物理通讯链路问题（端子对插不良、针脚脱落等）。

Solution:

1. Check battery wiring, PDU, and BAU communication wiring and terminals

2. If needed, disconnect the system and check in segments

3. Check power, PDU, PCS signal wiring and locking

4. Use multimeter to test DC/AC power
   1）检查、紧固电池、PDU、BAU之间电池通信线束、对插端子良好
   2）必要时系统断电，分区域分段检测线束导通良好
   3）检查电池、PDU、PCS（或汇流柜）之间动力线束、锁附良好
   4）万用表检测DC总压、AC供电电压正常

Description:
BMS master unit is malfunctioning.
BMS主机故障。

Possible Cause:
Likely internal issue of BMS.
大概率BMS工况问题。

Solution:

1. Check BMS ambient temperature, power, and communication

2. Verify if BMS master has warning info, review logs

3. Diagnose based on error message

4. Reboot BMS master and verify recovery
   1）检查BMS主机环境温度、供电电源、通信线缆良好
   2）检查BMS主机报警信号，根据屏幕报警记录排查原因
   3）根据报警原因逐项解决
   4）重启BMS主机，检查BMS主机告警信号是否复现

Description:
Third-level voltage deviation warning; shutdown.
电芯压差三级告警，shutdown。

Possible Cause:
BMU signal acquisition error, or communication failure.
单体电芯采集故障，两种原因：

1. BMU故障

2. 采集线未可靠连接

Solution:

1. Locate the faulty battery pack, isolate or replace corresponding BMU

2. Observe if issue recurs with same pack or new one

3. If BMU error, replace BMU

4. If recurring with same pack, check and reconnect voltage sense wires
   1）定位到故障电池包，从旁边包对调或补发新换一个BMU
   2）等待问题复现，看故障发生在新电包还是原电池包
   3）如果是BMU，就是BMU损坏，换新
   4）如果是电池包反复异常要排查电池包采集线束，子不牢，重新加固
   5）电芯问题的概率很低

Description:
Actual running power is lower than expected discharge power setting.
运行功率低于下发功率，最大充电、放电电流设置错误。

Solution:

1. Check if BAU screen shows correct max charge/discharge current

2. Adjust according to manufacturer or delivery parameters
   1）检查BAU屏幕最大充放电电流设置
   2）按订单要求/出厂参数设置

Description:
Firmware upgrade failed or ineffective.
升级失败或无效，未严格执行升级步骤。

Solution:

1. Confirm BMS manufacturer

2. Upgrade methods may differ by manufacturer

3. Some components are not universal; rebind if needed
   1）明确BMS厂家
   2）不同BMS厂家的升级方法不同
   3）有些BMS固件通用，有些不通用，不通用的需要各项目重新固件绑定

Description:
HMI screen powers on but shows no content.
屏幕通电后有背影却无任何显示。

Solution:

1. Check screen power wiring; use multimeter to test voltage (usually 24VDC)

2. If still dark, likely screen damage

3. Check past construction quality; may be caused by external force

4. Replace with new screen and test
   1）检查屏幕供电线束紧固，万用表检测电压是否正常（通常24VDC）
   2）若不亮，可初步判断屏幕出现故障
   3）追查之前使用工况，是否外界因素导致
   4）申请更换一个新的屏幕安装测试

Description:
Temperature of some packs is high but not over alarm threshold; BAU gives no alarm.
触感温度偏高，但BAU未报警，温度在正常范围但温度采集异常。

Solution:

1. Use infrared or multimeter to verify temperature readings and compare with BMS values

2. Check and tighten negative cable terminal of battery

3. Continue monitoring to see if temperature drifts further from norm
   1）采用红外测温仪检测温度并与BMS信号比对
   2）检查、紧固电池正负极接线端子
   3）持续监测电池温度，观察温度是否进一步偏离正常值

Description:
BAU reports high temperature warning; temperature feels abnormal to the touch.
触感温度高，BAU报警。

Possible Cause:
Normal temperature collection, but battery is overheating.
温度采集正常，电池高温。

Solution:

1. Use infrared thermometer to verify temperature and compare with BMS readings

2. Check and tighten negative terminal cable

3. Dismantle temperature sensor or loop and check tightness of copper lugs

4. Restore temperature sensor, log result

5. After repair, continue monitoring temperature variation

6. If resolved, log repair and reboot system
   1）采用红外测温仪检测温度并与BMS信号比对
   2）检查、紧固电池正负极接线端子
   3）拆包，检查电池温度探头和测温回路；检查正负铜排锁附紧固
   4）恢复温度异常点记录
   5）修复后，持续观察温度变化
   6）正常后，记录修复现状，安装回去，重启系统

Description:
Voltage deviation between cells exceeds upper/lower limit.
电芯间压差超出报警值（过高或过低）。

Possible Cause:
BMS protection strategy misconfigured or signal wire issue.
BMS保护策略不合理；线束问题；电芯故障（概率极低）。

Solution:

1. Collect 3 rounds of complete charge-discharge balancing data

2. Analyze data pattern, determine if deviation is patterned or random

3. If patterned, adjust BMS strategy and retest

4. If random, dismantle to inspect wiring

5. Use multimeter to compare actual cell voltage with BMS reading

6. Check and record if signal wire lugs are tightened

7. After repair, test again and reinstall

8. Log result and reboot system

9. If cell quality issue, consider replacement
   1）获取3次完整充放电完整数据
   2）对数据进行对比，确定压差出现时间是否有巧合，或无规律
   3）如果有规律，则是策略问题，修改策略后重新测试
   4）如果无规律，则是线束问题，需要拆包检查
   5）用万用表捕捉单体电芯实际电压与BMS采集电压对比，确定电芯正常
   6）检查、记录电芯采集线束锁附是否紧固
   7）修复线束后重新测试
   8）测试通过后做现场记录，安装回去，重启系统
   9）电芯本身质量问题，则需要替换模组

Description:
Thermal runaway with smoke, gas release, or fire.
出现剧烈反应，电芯热失控。

Solution:

1. Immediately shut down system, cut all AC/DC power

2. Evacuate and isolate the area, close fireproof doors

3. Record site condition and smoke/fire development

4. If fire, stop energy storage charge, disable station AC control

5. Execute emergency plan, isolate & report

6. After event ends, ensure safety, find root cause, initiate follow-up rescue
   1）立即关闭系统供电，切断系统各处电气连接
   2）立即组织撤离并封闭现场，疏散周边人员
   3）观察判断系统内是否初步起火，如未启动则人工启动
   4）立即停止整个储能电站，并远程解除电站全部电气连接
   5）按应急预案采取隔离和防护措施，防止故障扩大并及时上报
   6）事故结束，故障排除后，保证安全的情况下进一步核实原因及采取后续补救措施

Description:
No response after pressing the light switch.
按下灯开关没反应。

Possible Cause:
Common in older installations; switch or wiring may be loose.
常见于旧项目，经过长途海运振动等情况导致灯管与灯座接触不良。

Solution:

1. Use multimeter to test switch continuity

2. Reinstall light fixture and secure the connection
   1）万用表检测开关正常通电
   2）重新拆装灯管并加固

Description:
System cannot enter standby normally.
系统启动后无法正常待机。

Possible Cause:
Emergency stop button not released.
误按急停按钮未释放复位。

Solution:

1. Check if E-stop button is stuck

2. Release E-stop and reboot entire system
   1）检查急停按钮是否按下未恢复
   2）释放恢复后，重启整个系统

Description:
Cabinet door cannot close properly; tilt or angle misalignment.
门开启或关闭时倾斜，无法开合。

Possible Cause:
Improper leveling or hinge angle deviation.
地基不平整导致门板角度与柜体角度产生形变。

Solution:

1. Use level to check base leveling

2. Adjust angle by at least 3mm and retry
   1）水平尺检查柜体平整
   2）调整至整度，误差少于3mm后，重新开合门板

Description:
PCS/BMS/EMS communication interrupted; system cannot operate normally.
BMS与PCS与EMS通讯不正常，系统无法正常运行。

Possible Cause:
Internal device or external wiring failure.
系统内部或外接未通讯设备。

Solution:

1. Check system internal communication ports

2. Troubleshoot CAN box, external cables, and devices

3. Reboot system after corrections
   1）检查系统内部无外接未通讯设备
   2）排除外接设备（CAN盒等调试、外接、通讯设备）
   3）重启系统

Description:
System halts charge/discharge when SOC not reaching 0% or 100%.
SOC未到0或100就停止放电或充电。

Possible Cause:
SOC not calibrated, or cell voltage limits misconfigured.
1）SOC未校准
2）单体电压阈值设置不合理

Solution:

1. Check cell (or pack) condition and confirm threshold settings (factory default: 2.9, 2.7, 2.5, 3.55, 3.6, 3.65V)

2. Complete one full charge/discharge cycle to recalibrate SOC
   1）检查单体（和总体）欠压、过压值设置是否正确（出厂默认为2.9、2.7、2.5和3.55、3.6、3.65）
   2）完成至少一到两次完整的充放电循环测试，BMS会校准SOC

Description:
Cannot enter standby/working state normally.
不能正常启动到待机/工作状态。

Possible Cause:
Startup sequence is incorrect.
开机顺序不正确。

Solution:

1. Turn on PDU first, then all component power

2. Then power on BAU

3. Finally power on PCS
   1）先启动PDU后，启动所有组成部件供电
   2）再启动BAU后
   3）再启动PCS