Inverter Alarm Code List

Code	Level	Name	Reason	Solution
E001	Error	DC BUS Over Voltage	DC Bus voltage exceeds the upper limit.	Check whether the DC input voltage exceeds the limit. Restart the inverter. Seek help from the installer or manufacture.
E002	Error	Mains Lost	Grid power outage AC switch or circuit is disconnected.	Check whether the mains supply is lost. Check whether the AC cable wiring is correct.
E003	Error	Grid Voltage Fault	Inverter detects that the gird voltage exceeds the limit of selected safety set range.	Check whether the safety code is correct. Check whether the AC cable wiring is correct. Check whether the voltage increased cause by large AC cable impedance. In this case we could replce with a thicker AC cable. Extend the voltage protection limit with the permission of the Electricity Authority.
E004	Error	Grid Frequency Fault	Inverter detects that the AC frequency exceeds the limit of selected safety set range. If occasional grid fluctuations lead to the fault, the inverter will recover automatically.	Check whether the safety code is correct. Extend the frequency protection limit with the permission of the Electricity Authority.
E005	Error	DCI Fault	Inverter detects that the the direct current injection value exceeds the range.	Restart the inverter. Seek for help from the installer or manufacture.
E006	Error	ISO Over Limitation	Inverter detects that DC side's insulation impedance to the ground  is too low.	Check whether PV panels, cables, and connectors are waterlogged or damaged. Use a megger to measure ground resistance on the DC sidel, and the measured value should not be less than 500 KΩ. Seek help from the installer or manufacture.
E007	Error	GFCI Fault	The inverter detects that the ground leakage current exceeds the limitation.	Restart the inverter. Check whether the PV panels, cables, and connectors are waterlogged or damaged. Seek help from the installer or manufacture.
E008	Error	PV Over Voltage	PV input voltage exceeds the upper limit.	Reduce the number of PV panels to make sure that the open-circuit voltage of each string is lower than the inverter maximum allowed input voltage.
E009	Error	Over Temperature	The inverter detects its high internal temperature	Check whether the inverter installation location is well ventilated. Try to turn it off for a while, and then power it back on when it cools down. Seek help from the installer or manufacture.
E010	Error	N-PE Check Fault	The ground cable is losse or in poor connection on back-up side	Check whether the ground cable wiring is correct. If grounding is unnecessary, N-PE check function can be disabled.
E011	Error	Inverter Over Freq	The load power exceeds the range of its limit of inverter in off-gird mode	Check whether there is an impact load on the back-up side and whether the load power is too high. Check whether back-up side is short circuit.
E012	Error	BAT Voltage Fault	Battery voltage exceeds the upper limit.	Check if the DC input voltage is out of range. Check if the battery shuts down when the fault occurs.
E013	Error	BAK Voltage Fault	Abnormal voltage input on the backup side. Backup side internal relay damaged.	Check if the backup side is connected to the power supply. Restart the inverter.
E014	Error	HW Fault	Unknown hardware fault	Restart the inverter. Seek help from the installer or manufacture.
E015	Error	Backup Load Fault	Backup side load exceeds carrying capacity.	Reduce the load on the backup side Check the battery's load-carrying capacity
E016	Error	Inverter Over Voltage	During off-grid operation, backup side voltage exceeds the safety regulations. Internal circuit abnormality.	Check whether there is an impact load on the back-up side and whether the load power is too high. Check whether back-up side is short circuit.
E017	Error	Inverter Over Current	Abnormal load on the backup side during off-grid operation.	Check whether there is an impact load on the back-up side and whether the load power is too high. Check whether back-up side is short circuit.
E018	Error	FLASH Fault	Internal storage got abnomal. Caused by a strong external magnetic field etc.	Restart the inverter. Seek help from the installer or manufacture.
E019	Error	SCI Fault	Communication interruption between DSP and ARM	Restart the inverter. Seek help from the installer or manufacture.
E020	Error	SPI Fault	DSP communication interruption	Restart the inverter. Seek help from the installer or manufacture.
E021	Error	E2 Fault	EEPROM chip damaged.	Restart the inverter. Seek help from the installer or manufacture.
E022	Error	GFCI Sensor Fault	GFCI sensor fault	Restart the inverter. Seek help from the installer or manufacture.
E023	Error	AC Current Sensor Fault	Current sensor detection circuit abnormal.	Restart the inverter. Seek help from the installer or manufacture.
E024	Error	Relay Fault	Relay damaged	Restart the inverter. Seek help from the installer or manufacture.
E025	Error	Internal Fan Fault	The internal fan is borken, the power supply is insufficient.	Restart the inverter. Seek help from the installer or manufacture.
E026	Error	External Fan Fault	The external fan is borken, the power supply is insufficient, or the air channel is blocked	Check whether the fan is blocked by foreign matters, clean them if necessary.
E027	Error	Comm. Sampling Fault	AD port sampling interrpution.	Restart the inverter. Seek help from the installer or manufacture.
E028	Error	DC BUS Voltage Low	Backup side load exceeds carrying capacity.	Reduce the load on the backup side Check the battery's load-carrying capacity Restart the inverter.
E029	Error	Meter Comm Fault	Abnormal communication between meter and inverter.	Check whether the communication connection between inverter and meter is reliable Confirm whether the meter model is compatible
E030	Error	DC Arc Fault	The inverter's DC section has ARC issues.	Check whether there is any ARC or cable damage on the DC side. Restart the inverter. Seek help from the installer or manufacturer.
E031	Error	AFCI Comm Fault	Abnormal communication between inverter and AFCI module.	Check whether the communication cable is loose, damaged or in poor contact. Seek help from the installer or manufacturer.
E300	Error	Emergency button has been pressed	Emergency button has been pressed	Please remove the charge port out of the door and rotate the emergency button clockwise to reset it. If LED light indicator changes to green or blue, the fault has been recovered; otherwise, please contact technical support to check emergency button.
E301	Error	Emergency button has been pressed	Emergency button has been pressed	Please remove the charge port out of the door and rotate the emergency button clockwise to reset it. If LED light indicator changes to green or blue, the fault has been recovered; otherwise, please contact technical support to check emergency button.
E302	Error	Grounding Fault	EV charger station has not been properly grounded.	Please contact technical support to check how the grounding is going based on the measured voltage between N line and PE line: Proper grounding:[0,40]V Improper grounding:[40,90]V Not grounded:[90,130]V Improper grounding+ reverse connection between L line and N line:[130,180]V Reverse connection between L line and N line:[180,220]V
E303	Error	Charge Port Door Open	-	-
E304	Error	CP Error	Damaged charger cable Issue caused by the vehicle	Please contact technical support to check if there is any destruction of insulation on charger cable or charging with another vehicle to check if this issue still exists.
E305	Error	Meter Error	Hardware issue	Please contact technical support to check meter chip and its circuit.
E306	Error	Under Voltage	AC input voltage is too low, which is lower than 150V.	Please contact technical support to check if distribution system is normal and it is necessary to contact local utility institution if input voltage is lower than 150V.
E307	Error	Over Voltage	AC input voltage is too high and needs to be maintained under 275V	Please contact technical support to check if distribution system is normal and it is necessary to contact local utility institution if input voltage is higher than 275V.
E308	Error	Relay Sticking	Hardware issue	Please contact technical support to check relay circuit.
E309	Error	GFCI Protection	Damaged charger cable PE and power supply line have been connected at the vehicle side. Hardware issue The leakage current is out of the range at the vehicle side.	Please contact technical support to check if there is any destruction of insulation on charger cable or charging with another vehicle to check if this issue still exists.
E310	Error	Over Current	Minimum charging current allowed by the vehicle is greater than the one allowed by EV charger.	Please check if power reduce is requested on EV charger station and if charging current needs to be changed on vehicle side. If so, please set minimum charging current allowed by vehicle smaller than the one allowed by EV charger.
E311	Error	Communication Fault with Inverter	Abnormal communication between inverter and EV charger.	Please check if the connection between the inverter and EV charger is well and proper. Please ensure that EV charger is compatible with the inverter.
E312	Error	Other Faults	Unknown	Please contact technical suppprt.
E313	Error	Main Circuit Breaker Trip Protection	EV charger stops charging 3 times in 30 minutes.	The system will keep checking if the remaining power can support the EV charger charging at 1.3 times of the minimum charging power in 30 minutes. If the condition is met, the EV charger will start charging at minimum charging power, and the alarm will be cleared.
W001	Warn	Other Faults	Unknown	Please contact technical suppprt.
W002	Warn	PV Power Low	PV energy is instufficient Battery output capacity limited.	Check PV cable wiring. Check battery status.
W003	Warn	BAT Power Low	Abnormal status from battery BMS	Check battery status.
W004	Warn	DC BUS Voltage Unblance	Inverter current oscillation causing bus output power imbalance. IGBT damaged	Restart the inverter. Seek help from the installer or manufacturer.
W005	Warn	Phase Lock Fault	1.Abnormal grid voltage phase sequence. 2.Voltage sampling abnormality	Check whether the AC cable wiring is correct. Seek help from the installer or manufacturer.
W006	Warn	BAT Invalid	No battery connected. Battery BMS abnormal.	Check battery BMS status.
W300	Warn	Communication Fault of Partial DC Power Modules	Unknown	Please contact technical suppprt.
W301	Warn	Communication Fault of All DC Power Modules	Unknown	Please contact technical suppprt.
W302	Warn	Over Temperature	Ambient temperature is too high. Short circuit occurs.	Please provide shelter for EV charger station to avoid direct sunlight. Please make EV charger station away from the heat source. Please ensure ambient temperature lower than 40℃. When ambient temperature is lower than 40℃, please restart EV charger and check if the issue has been recovered after 1 min. If the issue still exists, please contact technical support.
W303	Warn	Other Protections	Unknown	Please contact technical suppprt.
W304	Warn	System Overcurrent Warning	Due to the current out of breaker rated range, EV charger stops charging 1 or 2 times during 30 minutes.	The system will keep monitoring if surplus power >= start power of EV charger in following 30 minutes. If this requirement is met, EV charger will restart and charge the car with the min power and the alarm will cleared at the same time.
E032	Error	Bus Voltage  Hard Fault	DC bus energy inflow exceeds outflow.	Check whether the input voltage on the DC side exceeds the limit.If it does,please modify the DC side configuration. Seek help from the installer or manufacturer.
E033	Error	DC BUS Voltage Unbalance	1.Inverter current oscillation causing bus output power imbalance. 2.IGBT damaged.	Restart the inverter. Seek help from the installer or manufacturer.
E034	Error	Backup Over Current	Backup current exceeds the limit.	Check whether current on the backup side input exceeds the limit. Restart the inverter. Seek help from the installer or manufacturer.
E035	Error	Backup Box Fault	Backup box cannot work properly.	Check whether the power supply to the backup box is normal. Check whether the contactor inside the backup box is damaged. Seek help from the installer or manufacturer.
W007	Warn	High-impedance Control Fault	High impedance causes three-phase unbalanced oscillation.	Disable unbalanced output.
W008	Warn	Comm Cmd Off	The inverter received a communication shutdown command.	Check fast stop, comm watchdog, RCR, and DRM settings.
W009	Warn	Meter Comm Fail	Under the hard control status for export limit, the meter communication is interrupted.	Check the meter communication cable connection. Check the export limit strategy settings.
E037	Error	Phase Order Err	Abnormal grid voltage phase sequence. Voltage sampling abnormality.	Check whether the AC cable wiring matches the grid phase sequence setting. Seek help from the installer or manufacturer.

Battery Alarm Code List

Level	Level Desc
L1	Info
L2	Warning
L3	Error

Code	Level	Name	Desc	Solution
E400	L3	BMS Comm Fault	Abnormal communication between Controller and Inverter	1. Check whether the battery ID selection is correct. 2. Check whether the communication connection between inverter and BMS is reliable 3. Check the working status of battery.
E431	L3	Abnormal Battery Voltage	Battery voltage deviation >100V (measured value by inverter and value reported by BMS)	1. Check if power cable is connected correctly 2. Check if any leakage or damage of the power cable 3. Check if any alarm and/or protection of battery 4. Reboot battery after removing anomalies and re-installation. If problem remains, contact manufacturer after-sales for solution
E432	L3	Abnormal BAT Parallel No.	Actual paralleled cluster No. is different from configured target No.	1.Check if the target parallel no. is set correctly. If incorrect, revise the target No. into correct value. 2.Check if any communication malfunctions between batteries/clusters and inverter. If any malfunction, resolve it and re-excute the parallel process. 3.Check if each cluster is powered on. If any cluster without power, turn on the DC breaker of each battery/cluster and re-excute the parallel process. 4.Check if there is any alarm or protection in any cluster. If any alarm or protection, resolve it and re-excute the parallel process. 5.Check if the voltage deviation between batteries/clusters is ≤2.5V. If anything abnormal, charge or discharge the batteries/cluster to ensure the voltage deviation ≤2.5V and then re-excute the parallel process.
E404	L3	BAT Voltage Sensor Fault	There might be something wrong with battery voltage sensor	1. Reboot the battery 2. If problem remains, contact manufacturer after-sales for solution
E405	L3	BAT Temp. Sensor Fault	There might be something wrong with battery temperature sensor	1. Reboot the battery 2. If problem remains, contact manufacturer after-sales for solution
E406	L3	BAT Internal Comm Fault	There might be something wrong with battery internal comm. circuit	1. Check comm. cable between battery module and controller. 2. Reboot the battery. If problem remains, contact manufacturer after-sales for solution
E407	L3	Input OV Fault	Input voltage on battery is too high	1. Check if power cables are incorrectly connected to other source 2. Check if there is malfunction of inverter
E408	L3	Input Reversed Fault	Input polarity is reversed	1. Check if power cables are reversely connected 2. Check if there is malfunction of inverter
E409	L3	BAT Relay Checking Fault	There might be something wrong with battery relay	1. Reboot the battery 2. If problem remains, contact manufacturer after-sales for solution
E410	L3	Cell Damaged Fault	Cell voltage < 2.0V	1. Reboot the battery 2. If problem remains, contact manufacturer after-sales for solution
E411	L3	Shutdown Circuit Fault	Can not completely switch off the system	1. Reboot the battery 2. If problem remains, contact manufacturer after-sales for solution
E412	L3	BMIC Fault	Sensor chip is abnormal	1. Reboot the battery 2. If problem remains, contact manufacturer after-sales for solution
E413	L3	BAT Internal Bus Fault	Battery internal bus is abnormal	1. Reboot the battery 2. If problem remains, contact manufacturer after-sales for solution
E414	L3	Self-checking Fault	Self-checking failed	1. Reboot the battery 2. If problem remains, contact manufacturer after-sales for solution
E415	L3	Safety Function Fault	Chip self-checking failed	1. Reboot the battery 2. If problem remains, contact manufacturer after-sales for solution
E416	L3	ISO Fault	Isolation is too low	1. Turn off the whole system 2. Check if any damage or breakage in devices, cables, terminals, etc. 3. Check if any circuit shorted by foreign matters. 4. Reboot battery after removing anomalies. If problem remains, contact manufacturer after-sales for solution
E417	L3	Cell UV	Cell votage is too low, which triggers the protection	1. Check if there is any malfunction of inverter, which leads to inexecution of forced-charging 2. Check if the external source (PV, utility grid, diesel generator, etc.) stop working, which leads to inexecution of forced-charging 3. Reboot and then charge the battery immediately.
E418	L3	Cell OV	Cell votage is too high, which triggers the protection	1. Check if there is any malfunction of inverter, which leads to inexecution of forced-discharging 2. Check if any unsuitable setting and/or configuration , which leads to inexecution of forced-discharging 3. Reboot and then discharge the battery immediately.
E419	L3	Cluster UV	Cluster votage is too low, which triggers the protection	1. Check if there is any malfunction of inverter, which leads to inexecution of forced-charging 2. Check if the external source (PV, utility grid, diesel generator, etc.) stop working, which leads to inexecution of forced-charging 3. Reboot and then charge the battery immediately.
E420	L3	Cluster OV	Cluster votage is too high, which triggers the protection	1. Check if there is any malfunction of inverter, which leads to inexecution of forced-discharging 2. Check if any unsuitable setting and/or configuration , which leads to inexecution of forced-discharging 3. Reboot and then discharge the battery immediately.
E421	L3	Charge UT	Temperature is too low for charge, which triggers the protection.	1. Check if battery temp. is reasonable 2. Check if any malfunction of temp. sensors 3. Increase the enviroment temp. to warm up battery and then reboot the battery.
E422	L3	Charge OT	Temperature is too high for charge, which triggers the protection.	1. Check if battery temp. is reasonable 2. Check if any malfunction of temp. sensors 3. Reduce the enviroment temp. to cool down battery and then reboot the battery.
E423	L3	Discharge UT	Temperature is too low for discharge, which triggers the protection.	1. Check if battery temp. is reasonable 2. Check if any malfunction of temp. sensors 3. Increase the enviroment temp. to warm up battery and then reboot the battery.
E424	L3	Discharge OT	Temperature is too high for discharge, which triggers the protection.	1. Check if battery temp. is reasonable 2. Check if any malfunction of temp. sensors 3. Reduce the enviroment temp. to cool down battery and then reboot the battery.
E425	L3	Charge OC	Charge current is too high, which triggers the protection.	1. Check if current limitation of battery decreases cause of temp, SOC, etc. 2. Check if inverter does not charge according to current limitation 3. Reboot battery after checking or adjusting configuration of inverter
E426	L3	Discharge OC	Discharge current is too high , which triggers the protection.	1. Check if current limitation of battery decreases cause of temp, SOC, etc. 2. Check if inverter does not discharge according to current limitation 3. Reboot battery after checking or adjusting configuration of inverter
E427	L3	Battery Module UV	Battery module votage is too low, which triggers the protection	1. Check if there is any malfunction of inverter, which leads to inexecution of forced-charging 2. Check if the external source (PV, utility grid, diesel generator, etc.) stop working, which leads to inexecution of forced-charging 3. Reboot and then charge the battery immediately.
E428	L3	Battery Module OV	Battery module votage is too high, which triggers the protection	1. Check if there is any malfunction of inverter, which leads to inexecution of forced-discharging 2. Check if any unsuitable setting and/or configuration , which leads to inexecution of forced-discharging 3. Reboot and then discharge the battery immediately.
E429	L3	Terminal OT	Termianl temperature is too high, which triggers the protection.	1. Check if terminal temp. is reasonable 2. Check if any malfunction of temp. sensors 3. Reduce the enviroment temp. to cool down terminal and then reboot the battery.
E430	L3	Abnormal Leakage	Leakage current is too high, which triggers the protection.	1. Turn off the whole system 2. Check if any damage or breakage in devices, cables, terminals, etc. 3. Check if any circuit shorted by foreign matters. 4. Reboot battery after removing anomalies.
I400	L1	Cell UV	Cell votage is too low, which triggers the alarm	1. Check if there is any malfunction or incorrect configuration of inverter, which leads to unstopped discharging. 2. Check if there is obvious cell voltage deviation. 3. Charge the battery immediately. 4. If there is cell volatge deviation, fully charge and discharge the battery for several times (>10 cycles). If unsolved, contact  manufacturer after-sales for solution.
I401	L1	Cell OV	Cell votage is too high, which triggers the alarm	1. Check if there is any malfunction or incorrect configuration of inverter, which leads to inexecution protection according to charging  voltage limitation. 2. Check if any unsuitable setting and/or configuration , which leads to inexecution of forced-discharging 3. Discharge the battery immediately 4. If there is cell volatge deviation, fully charge and discharge the battery for several times (>10 cycles). If unsolved, contact  manufacturer after-sales for solution.
I402	L1	Cluster UV	Cluster votage is too low, which triggers the alarm	1. Check if there is any malfunction or incorrect configuration of inverter, which leads to unstopped discharging. 2. Check if load power is oversized. 3. Charge the battery immediately.
I403	L1	Cluster OV	Cluster votage is too high, which triggers the alarm	1.  Check if there is any malfunction or incorrect configuration of inverter, which leads to inexecution protection according to charging  voltage limitation. 2. Check if any unsuitable setting and/or configuration , which leads to inexecution of forced-discharging 3. Discharge the battery immediately.
I404	L1	Charge UT	Temperature is too low for charge, which triggers the alarm.	1. Check if battery temp. is reasonable 2. Check if any malfunction of temp. sensors 3. Increase the enviroment temp. to warm up battery.
I405	L1	Charge OT	Temperature is too high for charge, which triggers the alarm.	1. Check if battery temp. is reasonable 2. Check if any malfunction of temp. sensors 3. Reduce the enviroment temp. to cool down battery or reduce the charging current.
I406	L1	Discharge UT	Temperature is too low for discharge, which triggers the alarm.	1. Check if battery temp. is reasonable 2. Check if any malfunction of temp. sensors 3. Increase the enviroment temp. to warm up battery.
I407	L1	Discharge OT	Temperature is too high for discharge, which triggers the alarm.	1. Check if battery temp. is reasonable 2. Check if any malfunction of temp. sensors 3. Reduce the enviroment temp. to cool down battery or reduce the discharging current.
I408	L1	Charge OC	Charge current is too high, which triggers the alarm.	1. Check if current limitation of battery decreases cause of temp, SOC, etc. 2. Check if inverter does not charge according to current limitation 3. Reboot battery after checking or adjusting configuration of inverter
I409	L1	Discharge OC	Discharge current is too high, which triggers the alarm.	1. Check if current limitation of battery decreases cause of temp, SOC, etc. 2. Check if inverter does not discharge according to current limitation 3. Reboot battery after checking or adjusting configuration of inverter
I410	L1	Battery Module UV	Battery module votage is too low, which triggers the alarm	1. Check if there is any malfunction or incorrect configuration of inverter, which leads to unstopped discharging. 2. Check if load power is oversized. 3. Charge the battery immediately.
I411	L1	Battery Module OV	Battery module votage is too high, which triggers the alarm	1.  Check if there is any malfunction or incorrect configuration of inverter, which leads to inexecution protection according to charging  voltage limitation. 2. Check if any unsuitable setting and/or configuration , which leads to inexecution of forced-discharging 3. Discharge the battery immediately.
I412	L1	Terminal OT	Termianl temperature is too high, which triggers the alarm.	1. Check if terminal temp. is reasonable 2. Check if any malfunction of temp. sensors 3. Reduce the enviroment temp. to cool down terminal and then reboot the battery.
I413	L1	Abnormal Fan	Fan of battery module is abnormal	1. Turn off the battery and check if power cable of fan is connected correctly 2. Contact manufacturer after-sales for solution
I414	L1	Abnormal Leakage	Leakage current is too high, which triggers the alarm.	1. Turn off the whole system 2. Check if any damage or breakage in devices, cables, terminals, etc. 3. Check if any circuit shorted by foreign matters. 4. Reboot battery after removing anomalies.
W400	L2	Cell UV	Cell votage is too low, which triggers the warning	1. Check if there is any malfunction or incorrect configuration of inverter, which leads to unstopped discharging. 2. Check if there is obvious cell voltage deviation. 3. Charge the battery immediately. 4. If there is cell volatge deviation, fully charge and discharge the battery for several times (>10 cycles). If unsolved, contact  manufacturer after-sales for solution.
W401	L2	Cell OV	Cell votage is too high, which triggers the warning	1. Check if there is any malfunction or incorrect configuration of inverter, which leads to inexecution protection according to charging  voltage limitation. 2. Check if any unsuitable setting and/or configuration , which leads to inexecution of forced-discharging 3. Discharge the battery immediately 4. If there is cell volatge deviation, fully charge and discharge the battery for several times (>10 cycles). If unsolved, contact  manufacturer after-sales for solution.
W402	L2	Cluster UV	Cluster votage is too low, which triggers the warning	1. Check if there is any malfunction or incorrect configuration of inverter, which leads to unstopped discharging. 2. Check if load power is oversized. 3. Charge the battery immediately.
W403	L2	Cluster OV	Cluster votage is too high, which triggers the warning	1.  Check if there is any malfunction or incorrect configuration of inverter, which leads to inexecution protection according to charging  voltage limitation. 2. Check if any unsuitable setting and/or configuration , which leads to inexecution of forced-discharging 3. Discharge the battery immediately.
W404	L2	Charge UT	Temperature is too low for charge, which triggers the warning.	1. Check if battery temp. is reasonable 2. Check if any malfunction of temp. sensors 3. Increase the enviroment temp. to warm up battery.
W405	L2	Charge OT	Temperature is too high for charge, which triggers the warning.	1. Check if battery temp. is reasonable 2. Check if any malfunction of temp. sensors 3. Reduce the enviroment temp. to cool down battery or reduce the charging current.
W406	L2	Discharge UT	Temperature is too low for discharge, which triggers the warning.	1. Check if battery temp. is reasonable 2. Check if any malfunction of temp. sensors 3. Increase the enviroment temp. to warm up battery.
W407	L2	Discharge OT	Temperature is too high for discharge, which triggers the warning.	1. Check if battery temp. is reasonable 2. Check if any malfunction of temp. sensors 3. Reduce the enviroment temp. to cool down battery or reduce the discharging current.
W408	L2	Charge OC	Charge current is too high, which triggers the alarm.	1. Check if current limitation of battery decreases cause of temp, SOC, etc. 2. Check if inverter does not charge according to current limitation 3. Reboot battery after checking or adjusting configuration of inverter
W409	L2	Discharge OC	Discharge current is too high, which triggers the alarm.	1. Check if current limitation of battery decreases cause of temp, SOC, etc. 2. Check if inverter does not discharge according to current limitation 3. Reboot battery after checking or adjusting configuration of inverter
W410	L2	Battery Module UV	Battery module votage is too low, which triggers the warning	1. Check if there is any malfunction or incorrect configuration of inverter, which leads to unstopped discharging. 2. Check if load power is oversized. 3. Charge the battery immediately.
W411	L2	Battery Module OV	Battery module votage is too high, which triggers the warning	1.  Check if there is any malfunction or incorrect configuration of inverter, which leads to inexecution protection according to charging  voltage limitation. 2. Check if any unsuitable setting and/or configuration , which leads to inexecution of forced-discharging 3. Discharge the battery immediately.
W412	L2	BMU Offline	BMU in battery module is offline	Turn off battery and contact manufacturer after-sales for solution.
W413	L2	BMCU Offline	BMCU in controller is offline	Turn off battery and contact manufacturer after-sales for solution.
W414	L2	SN Change of Module	Battery module(s) changed	1. Check if any battery module is removed or added 2. Check if SOC and voltage of all the battery modules are the same when added 3. Contact installer, distributro or manufacturer after-sales for confirmation and elimination.
W415	L2	Abnormal Change of Cluster Voltage	Cluster voltage changes too much in 2s	1. Check if power cable is connected correctly. 2. Check if abnormal change of voltage and SOC. 3. Reboot battery after removing anomalies. If problem remains, contact manufacturer after-sales for solution
W416	L2	Abnormal Cluster △V	There is visible voltage deviation between clusters	1. Check if power cable is connected correctly. 2. Check if abnormal change of voltage and SOC. 3. Check if battery mode and number in each cluster is the same. 4. Reboot battery after removing anomalies. If problem remains, contact manufacturer after-sales for solution
W417	L2	Abnormal Module △V	There is visible voltage deviation between battery modules	1. Check if power cable is connected correctly. 2. Check if abnormal change of voltage and SOC. 3. Reboot battery after removing anomalies. If problem remains, contact manufacturer after-sales for solution
E433	L3	Fire Alarm	Presence of fire, smoke,or other fire-related emergencies are detected.	Immediately ensure all on-site systems enter E-stop and check the alarm validity. If alarm is TRUE: 1. Evacuate all non-essential personnel at once. 2. Contact qualified technicians or fire-rescue immediately. 3. Establish an isolation perimeter without delay.
E434	L3	Flooding Alarm	There is too much water accumulated in the system, which triggers the flood alarm.	Immediately ensure all on-site systems enter E-stop and check the alarm validity. If alarm is TRUE: 1. Evacuate all non-essential personnel at once. 2. Contact qualified technicians or fire-rescue immediately. 3. Establish an isolation perimeter without delay.
E435	L3	Acess Alarm	Access control detect the disclosure of cabinet door.	1. Check if the cabinet door is opened without authorization. if it is an unauthorized opening, close the door with confirmation of the safety of on-site personnel and system. 2. Check if the access control  is functioning normally. if there is faulty, replace it immediately.
E436	L3	Emergency Stop	System emergency stop is triggered manually or automatically due to the present or potential hazard to system or personnel.	1. Check if there is present and/or potentional hazard to personnel or system. If it is true, excute those solutions of corresponding alarm . 2. Check if emergency-stop was activated accidentally. If it was a false trigger, reset the E-stop with confirmation of the safety of on-site personnel and system.
E437	L3	UPS Battery Damaged	UPS battery has been damaged due to misuse or other causes.	1. Reboot the UPS. 2. If problem remains, contact manufacturer after-sales for solution.
E438	L3	UPS OT	UPS is over temperature due to operating environment,overcurrent, etc.	1. Check if  UPS temperature is reasonable. 2. Check if any malfunction of temp. sensors. 3. Reduce the charging current or decrease the load power. 4. Reduce the enviroment temp. to cool down UPS.
E439	L3	Abnormal Extinguisher Comm.	Abnormal communication between extinguisher and EMS	1. Check if any damage in comm. cables or ports. 2. Check on-site wiring and comm. settings are correct. 3. Check if any magnetic interference is present. 4. Reboot the system. If problem remains, contact manufacturer after-sales for solution
E440	L3	Abnormal Air Conditioner Alarm	Air conditioner is under abnormality due to component, operation conditions, etc.	1. Check if any damage in the air conditioner。 2. Check the error code on the panel of air conditioner. 3. Check if any malfunction of temp. sensors. 4. Check if any magnetic interference is present. 5. Reboot the system. If problem remains, contact manufacturer after-sales for solution
E441	L3	Abnormal EMS-BMS Comm.	Abnormal communication between BMS and EMS	1. Check if correct selection of battery ID. 2. Check the working status of battery. 3. Check if any damage in comm. cables or ports. 4. Check on-site wiring and comm. settings are correct. 5. Check if any magnetic interference is present. 6. Reboot the system. If problem remains, contact manufacturer after-sales for solution
E442	L3	Abnormal EMS-Fire-SYS Comm.	Abnormal communication between Fire-safety system and EMS	1. Check if any damage in comm. cables or ports. 2. Check on-site wiring and comm. settings are correct. 3. Check if any magnetic interference is present. 4. Reboot the system. If problem remains, contact manufacturer after-sales for solution
E443	L3	Abnormal EMS-Air Conditioner Comm.	Abnormal communication between air conditioner and EMS	1. Check if any damage in comm. cables or ports. 2. Check on-site wiring and comm. settings are correct. 3. Check if any magnetic interference is present. 4. Reboot the system. If problem remains, contact manufacturer after-sales for solution