Sigen Inverter

1001

Code	Name	ID	ID Name	Cause	Repair Suggestion
1001	The software version does not match	ID1	The inverter software version does not match	The equipment's internal software version does not match.	If the upgrade is unsuccessful, please submit fault feedback on the APP-service-troubleshooting page.
		ID2	The inverter software & hardware version does not match
		ID3	The protocol versions among equipment do not match

1002

Code	Name	ID	ID Name	Cause	Repair Suggestion
1002	Low insulation resistance	ID1	Low insulation resistance	The PV string is short circuited to the PE, or the PV string is installed in a chronically humid env.	Check the DC cable for short circuits or broken cables. Check whether the positive and negative poles of the DC cable are shorted to the ground. If the cable is normal and the fault occurs on rainy days, confirm again after the weather improves; Check whether the ISO impedance protection value is too high through the APP to confirm that it meets the requirements of local regulations; If it is not due to the above reasons and the fault still exists, please submit fault feedback on the APP-service-troubleshooting page.

1003

Code	Name	ID	ID Name	Cause	Repair Suggestion
1003	Over-temperature	ID1	Inverter over-temperature	Too high ambient temperature, poor ventilation in the installation location Malfunction of the int.	Generally, the machine will be restarted after the internal temperature or module temperature returns to normal, if the failure occurs repeatedly: Check whether the ventilation of the installation location of the equipment is good and improved. Check whether the device is exposed to direct light and improve. To confirm that the above reasons are not the above and the fault still exists, please submit fault feedback on the APP-service-troubleshooting page.

Code

Name

ID

ID Name

Cause

Repair Suggestion

1003

Over-temperature

ID1

Inverter over-temperature

Too high ambient temperature, poor ventilation in the installation location Malfunction of the int.

Generally, the machine will be restarted after the internal temperature or module temperature returns to normal, if the failure occurs repeatedly:

Check whether the ventilation of the installation location of the equipment is good and improved.
Check whether the device is exposed to direct light and improve.

To confirm that the above reasons are not the above and the fault still exists, please submit fault feedback on the APP-service-troubleshooting page.

1004

Code	Name	ID	ID Name	Cause	Repair Suggestion
1004	Equipment fault	ID1	Malfunction of the power module	Internal circuit fault.	Give standby/shutdown instructions, disconnect the DC and AC switches, and wait a few minutes until the device is completely powered down. Restore DC and AC switches and give boot instructions. If the fault does not disappear, please submit the fault feedback on the APP-service-troubleshooting page.
		ID2	Control module fault
		ID3	Auxiliary power supply module fault
		ID4	Built-in PID module fault
		ID5	Monitoring module fault
		ID6	Heating film fault
		ID7	External fan fault
		ID8	Abnormal nighttime PID function
		ID9	Energy storage cluster fault	There is a fault in the energy storage cluster.	Please submit a fault report on the mySigen APP's Support > troubleshooting page or contact the Sigenergy Customer Service Center to check if the energy storage cluster is functioning properly.

1005

Code	Name	ID	ID Name	Cause	Repair Suggestion
1005	System grounding fault	ID1	System grounding fault	PE cable not grounded.	Check whether the protective ground wire is connected normally. To confirm that the above reasons are not the above and the fault still exists, please submit fault feedback on the APP-service-troubleshooting page.

1006

Code	Name	ID	ID Name	Cause	Repair Suggestion
1006	PV string overvoltage	ID1	String 1 input overvoltage	Too many strings in series. The open-circuit voltage is greater than the max. input voltage.	Measure whether the PV voltage of the corresponding alarm string exceeds the system voltage, and appropriately reduce the number of components on the string according to the product specifications. If the above reasons are not confirmed and the fault still exists, please submit a fault feedback on the Support > troubleshooting page of the mySigen APP or contact the Sigenergy Customer Service Center.
		ID2	String 2 input overvoltage
		ID3	String 3 input overvoltage
		ID4	String 4 input overvoltage
		ID5	String 5 input overvoltage
		ID6	String 6 input overvoltage
		ID7	String 7 input overvoltage
		ID8	String 8 input overvoltage
		ID9	String 9 input overvoltage
		ID10	String 10 input overvoltage
		ID11	String 11 input overvoltage
		ID12	String 12 input overvoltage
		ID13	String 13 input overvoltage
		ID14	String 14 input overvoltage
		ID15	String 15 input overvoltage
		ID16	String 16 input overvoltage
		ID17	MPPT1 input overvoltage
		ID18	MPPT2 input overvoltage
		ID19	MPPT3 input overvoltage
		ID20	MPPT4 input overvoltage
		ID21	MPPT5 input overvoltage
		ID22	MPPT6 input overvoltage
		ID23	MPPT7 input overvoltage
		ID24	MPPT8 input overvoltage
		ID25	MPPT9 input overvoltage
		ID26	MPPT10 input overvoltage
		ID27	MPPT11 input overvoltage
		ID28	MPPT12 input overvoltage
		ID29	MPPT13 input overvoltage
		ID30	MPPT14 input overvoltage
		ID31	MPPT15 input overvoltage
		ID32	MPPT16 input overvoltage
		ID33	MPPT17 input overvoltage
		ID34	MPPT18 input overvoltage
		ID35	MPPT19 input overvoltage
		ID36	MPPT20 input overvoltage
		ID37	MPPT21 input overvoltage
		ID38	MPPT22 input overvoltage
		ID39	MPPT23 input overvoltage
		ID40	MPPT24 input overvoltage

1007

Code	Name	ID	ID Name	Cause	Repair Suggestion
1007	PV string reversely connected	ID1	String 1 reversely connected	Positive and negative terminals reversely connected.	Check whether the positive and negative poles of the corresponding alarm string are reversed. If so, wait for the photovoltaic string current to drop below 0.5A, disconnect the DC switch, and adjust the polarity of the corresponding string. If the above reasons are not the cause and the fault still exists, please submit a fault feedback on the mySigen APP's Support > troubleshooting page or contact the Sigenergy Customer Service Center.
		ID2	String 2 reversely connected
		ID3	String 3 reversely connected
		ID4	String 4 reversely connected
		ID5	String 5 reversely connected
		ID6	String 6 reversely connected
		ID7	String 7 reversely connected
		ID8	String 8 reversely connected
		ID9	String 9 reversely connected
		ID10	String 10 reversely connected
		ID11	String 11 reversely connected
		ID12	String 12 reversely connected
		ID13	String 13 reversely connected
		ID14	String 14 reversely connected
		ID15	String 15 reversely connected
		ID16	String 16 reversely connected
		ID17	String 17 reverse connection
		ID18	String 18 reverse connection
		ID19	String 19 reverse connection
		ID20	String 20 reverse connection
		ID21	String 21 reverse connection
		ID22	String 22 reverse connection
		ID23	String 23 reverse connection
		ID24	String 24 reverse connection
		ID25	String 25 reverse connection
		ID26	String 26 reverse connection
		ID27	String 27 reverse connection
		ID28	String 28 reverse connection
		ID29	String 29 reverse connection
		ID30	String 30 reverse connection
		ID31	String 31 reverse connection
		ID32	String 32 reverse connection
		ID33	String 33 reverse connection
		ID34	String 34 reverse connection
		ID35	String 35 reverse connection
		ID36	String 36 reverse connection
		ID37	String 37 reverse connection
		ID38	String 38 reverse connection
		ID39	String 39 reverse connection
		ID40	String 40 reverse connection

1008

Code	Name	ID	ID Name	Cause	Repair Suggestion
1008	PV string sinking current	ID1	String 1 sinking current	Inconsistent configuration of strings.	Check whether the number of panels configured for the corresponding alarm string is less than other strings. If so, wait for the photovoltaic string current to drop below 0.5A, disconnect the DC switch, and adjust the panel configuration for that string. Check whether the string panels are obstructed. If so, improve the obstruction or clean the panels. Check whether the orientation of the string panels is abnormal. If so, adjust the panel orientation. If none of the above reasons apply and the fault still exists, please submit a fault feedback on the mySigen APP's Support > troubleshooting page or contact the Sigenergy customer service center.
		ID2	String 2 sinking current
		ID3	String 3 sinking current
		ID4	String 4 sinking current
		ID5	String 5 sinking current
		ID6	String 6 sinking current
		ID7	String 7 sinking current
		ID8	String 8 sinking current
		ID9	String 9 sinking current
		ID10	String 10 sinking current
		ID11	String 11 sinking current
		ID12	String 12 sinking current
		ID13	String 13 sinking current
		ID14	String 14 sinking current
		ID15	String 15 sinking current
		ID16	String 16 sinking current
		ID17	String 17 backfeed
		ID18	String 18 backfeed
		ID19	String 19 backfeed
		ID20	String 20 backfeed
		ID21	String 21 backfeed
		ID22	String 22 backfeed
		ID23	String 23 backfeed
		ID24	String 24 backfeed
		ID25	String 25 backfeed
		ID26	String 26 backfeed
		ID27	String 27 backfeed
		ID28	String 28 backfeed
		ID29	String 29 backfeed
		ID30	String 30 backfeed
		ID31	String 31 backfeed
		ID32	String 32 backfeed
		ID33	String 33 backfeed
		ID34	String 34 backfeed
		ID35	String 35 backfeed
		ID36	String 36 backfeed
		ID37	String 37 backfeed
		ID38	String 38 backfeed
		ID39	String 39 backfeed
		ID40	String 40 backfeed

1009

Code	Name	ID	ID Name	Cause	Repair Suggestion
1009	AFCI fault	ID1	AFCI fault of string 1	DC cable damaged. Poor contact of string connector.	Disconnect the PV DC switch and check whether the corresponding alarm string has any issues such as DC side cable damage, poor contact of connection terminals, or burn marks. If any are found, replace the damaged cable, tighten the connection terminals, or replace the components with burn marks. Re-close the PV DC switch and clear the AFCI fault through the APP, allowing the device to resume operation. If none of the above reasons apply and the fault still exists, please submit a fault feedback on the APP-support-troubleshooting page or contact the Sigenergy customer service center.
		ID2	AFCI fault of string 2
		ID3	AFCI fault of string 3
		ID4	AFCI fault of string 4
		ID5	AFCI fault of string 5
		ID6	AFCI fault of string 6
		ID7	AFCI fault of string 7
		ID8	AFCI fault of string 8
		ID9	AFCI fault of string 9
		ID10	AFCI fault of string 10
		ID11	AFCI fault of string 11
		ID12	AFCI fault of string 12
		ID13	AFCI fault of string 13
		ID14	AFCI fault of string 14
		ID15	AFCI fault of string 15
		ID16	AFCI fault of string 16
		ID17	String 17 AFCI fault
		ID18	String 18 AFCI fault
		ID19	String 19 AFCI fault
		ID20	String 20 AFCI fault
		ID21	String 21 AFCI fault
		ID22	String 22 AFCI fault
		ID23	String 23 AFCI fault
		ID24	String 24 AFCI fault
		ID25	String 25 AFCI fault
		ID26	String 26 AFCI fault
		ID27	String 27 AFCI fault
		ID28	String 28 AFCI fault
		ID29	String 29 AFCI fault
		ID30	String 30 AFCI fault
		ID31	String 31 AFCI fault
		ID32	String 32 AFCI fault
		ID33	String 33 AFCI fault
		ID34	String 34 AFCI fault
		ID35	String 35 AFCI fault
		ID36	String 36 AFCI fault
		ID37	String 37 AFCI fault
		ID38	String 38 AFCI fault
		ID39	String 39 AFCI fault
		ID40	String 40 AFCI fault

1010

Code	Name	ID	ID Name	Cause	Repair Suggestion
1010	Grid power outage	ID1	Grid power outage	Grid power outage or AC switch turned off.	Under normal circumstances, the inverter will be reconnected to the grid after the grid returns to normal. If the failure recurs: Check whether the grid is reliably supplied. Check whether the AC switch is open and whether the AC circuit breaker is closed. Confirm whether the off-grid function is enabled (for off-grid products). To confirm that the above reasons are not the above and the fault still exists, please submit fault feedback on the APP-support-troubleshooting page.
ID2	Grid power failure lock	The equipment has experienced a grid power outage fault before, and the equipment remains in a shutdown state.	1. After confirming the site conditions, manually clear the alarm on the alarm interface of the APP.

Code

Name

ID

ID Name

Cause

Repair Suggestion

1010

Grid power outage

ID1

Grid power outage

Grid power outage or AC switch turned off.

Under normal circumstances, the inverter will be reconnected to the grid after the grid returns to normal. If the failure recurs:

Check whether the grid is reliably supplied.

Check whether the AC switch is open and whether the AC circuit breaker is closed.

Confirm whether the off-grid function is enabled (for off-grid products).

To confirm that the above reasons are not the above and the fault still exists, please submit fault feedback on the APP-support-troubleshooting page.

ID2

Grid power failure lock

The equipment has experienced a grid power outage fault before, and the equipment remains in a shutdown state.

1. After confirming the site conditions, manually clear the alarm on the alarm interface of the APP.

1011

Code	Name	ID	ID Name	Cause	Repair Suggestion
1011	Grid overvoltage	ID1	Grid overvoltage Level I	The grid voltage is greater than the overvoltage threshold Level I	Under normal circumstances, the inverter will be reconnected to the grid after the grid returns to normal. If the failure occurs repeatedly: Measure the actual grid voltage, if the grid voltage is higher than the set value, contact the local power operator for a solution. Check the setting of the protection parameters through the APP, and modify the overvoltage protection value after obtaining the consent of the local power operator. To confirm that the above reasons are not the above and the fault still exists, please submit fault feedback on the APP-service-troubleshooting page.
		ID2	Grid overvoltage Level II	The grid voltage is greater than the overvoltage threshold Level II
		ID3	Grid overvoltage Level III	The grid voltage is greater than the overvoltage threshold Level III

1012

Code	Name	ID	ID Name	Cause	Repair Suggestion
1012	Grid undervoltage	ID1	Grid undervoltage Level I	The grid voltage is less than the undervoltage threshold I	Under normal circumstances, the inverter will be reconnected to the grid after the grid returns to normal. If the failure occurs repeatedly: Measure the actual grid voltage, and if the grid voltage is lower than the set value, contact the local power operator for resolution. Check whether the settings of the APP protection parameters meet the requirements. To confirm that the above reasons are not the above and the fault still exists, please submit fault feedback on the APP-service-troubleshooting page.
		ID2	Grid undervoltage Level II	The grid voltage is less than the undervoltage threshold Level II
		ID3	Grid undervoltage Level III	The grid voltage is less than the undervoltage threshold Level III

1013

Code	Name	ID	ID Name	Cause	Repair Suggestion
1013	Grid overfrequency	ID1	Grid overfrequency Level I	The grid frequency is greater than the overfrequency threshold Level I	Under normal circumstances, the inverter will be reconnected to the grid after the grid returns to normal. If the failure occurs repeatedly: Measure the actual grid frequency, and if the grid frequency is indeed outside the set range, contact the local power operator for resolution. Check whether the setting of protection parameters meets the requirements through the APP. To confirm that the above reasons are not the above and the fault still exists, please submit fault feedback on the APP-service-troubleshooting page.
		ID2	Grid overfrequency Level II	The grid frequency is greater than the overfrequency threshold Level II
		ID3	Grid overfrequency Level III	The grid frequency is greater than the overfrequency threshold Level III

1014

Code	Name	ID	ID Name	Cause	Repair Suggestion
1014	Grid underfrequency	ID1	Grid underfrequency Level I	The grid frequency is less than the underfrequency threshold Level I	Under normal circumstances, the inverter will be reconnected to the grid after the grid returns to normal. If the failure occurs repeatedly: Measure the actual grid frequency, and if the grid frequency is indeed outside the set range, contact the local power operator for resolution; Check whether the setting of protection parameters meets the requirements through the APP; To confirm that the above reasons are not the above and the fault still exists, please submit fault feedback on the APP-service-troubleshooting page.
		ID2	Grid underfrequency Level II	The grid frequency is less than the underfrequency threshold Level II
		ID3	Grid underfrequency Level III	The grid frequency is less than the underfrequency threshold Level III

1015

Code	Name	ID	ID Name	Cause	Repair Suggestion
1015	Grid voltage imbalance	ID1	Grid voltage imbalance	Three-phase grid phase angle imbalance. Three-phase grid amplitude imbalance.	Under normal circumstances, the inverter will be reconnected to the grid after the grid returns to normal. If the failure occurs repeatedly: Measure the actual grid voltage, if the phase voltage amplitude or phase difference of each phase of the power grid is large, please contact the current power company for a solution. To confirm that the above reasons are not the above and the fault still exists, please submit fault feedback on the App-service-troubleshooting page.

Code

Name

ID

ID Name

Cause

Repair Suggestion

1015

Grid voltage imbalance

ID1

Grid voltage imbalance

Three-phase grid phase angle imbalance.

Three-phase grid amplitude imbalance.

Under normal circumstances, the inverter will be reconnected to the grid after the grid returns to normal. If the failure occurs repeatedly:

Measure the actual grid voltage, if the phase voltage amplitude or phase difference of each phase of the power grid is large, please contact the current power company for a solution.

To confirm that the above reasons are not the above and the fault still exists, please submit fault feedback on the App-service-troubleshooting page.

1016

Code	Name	ID	ID Name	Cause	Repair Suggestion
1016	DC component of output current out of limit	ID1	DC component of output current out of limit	The DC component in the AC output current is greater than the set point.	If it occurs by chance, it may be caused by transient sudden changes in the environment, and the equipment will resume normal operation after the external environment is stabilized without manual intervention. If it occurs frequently or cannot be recovered for a long time, please contact SEG Customer Service.

1017

Code	Name	ID	ID Name	Cause	Repair Suggestion
1017	Leak current out of limit	ID1	Leak current out of limit	The leak current exceeds the protection threshold.	This may be occasionally caused by transient environmental changes. The equipment will resume normmal operation without manual intervention after the environment is stabilized. If this happens frequently or cannot be resumed for an extended period of time, please contact Service Center.

1018

Code	Name	ID	ID Name	Cause	Repair Suggestion
1018	Communication fault	ID1	4G communication fault	Insufficient 4G traffic or SIM card not inserted. Poor contact of internal communication Dongle.	Please check the 4G data, if the data is insufficient, please recharge. If the 4G data is sufficient, please reseat the 4G Dongle and wait for the 4G communication to be restored. If the fault does not go away, please submit fault feedback on the APP-service-support-troubleshooting page.
		ID2	CAN communication fault	Poor contact of floating connectors. CAN module communication fault.	Restart the device and wait for it to return to normal. If the fault does not disappear, please submit the fault feedback on the APP-support-troubleshooting page.
		ID3	Meter communication fault	Poor contact between meter connector and equipment.	Check whether the meter communication port is connected reliably. If the fault does not disappear, please submit the fault feedback on the APP-support-troubleshooting page.
		ID4	Gateway communication fault	Poor contact between Gateway and all-in-one machine.	Check whether the Gateway communication port is reliably connected. If the fault does not disappear, please submit a fault feedback on the Support>troulessshooting page of mySigen App.

1019

Code	Name	ID	ID Name	Cause	Repair Suggestion
1019	Internal protection	ID1	MPPT1 overcurrent protection	MPPT overcurrent protection triggered.	This may be occasionally caused by transient environmental changes. The equipment will resume normal operation without manual intervention after the environment is stabilized. If this happens frequently or cannot be resumed for an extended period of time, please contact Service Center.
		ID2	MPPT2 overcurrent protection
		ID3	MPPT3 overcurrent protection
		ID4	MPPT4 overcurrent protection
		ID5	MPPT5 overcurrent protection
		ID6	MPPT6 overcurrent protection
		ID7	MPPT7 overcurrent protection
		ID8	MPPT8 overcurrent protection
		ID9	MPPT9 overcurrent protection
		ID10	MPPT10 overcurrent protection
		ID11	MPPT11 overcurrent protection
		ID12	MPPT12 overcurrent protection
		ID13	MPPT13 overcurrent protection
		ID14	MPPT14 overcurrent protection
		ID15	MPPT15 overcurrent protection
		ID16	MPPT16 overcurrent protection
		ID17	Inverter output overcurrent protection	Inverter overcurrent protection triggered.
		ID18	BUS overvoltage protection	Internal BUS overvoltage protection triggered.
		ID19	Internal BUS voltage imbalance protection	Internal BUS voltage imbalance protection triggered.
		ID20	Internal control protection	Internal control protection triggered.
		ID21	MPPT17 Overcurrent Protection
		ID22	MPPT18 overcurrent protection
		ID23	MPPT19 Overcurrent Protection
		ID24	MPPT20 Overcurrent Protection

1020

Code	Name	ID	ID Name	Cause	Repair Suggestion
1020	Abnormal AFCI self-checking circuit	ID1	AFCI self-checking circuit 1 fault	DC arc detection circuit self-checking failed.	Disconnect the PV DC switch and check whether the corresponding alarm string has any signs of DC side cable damage, poor contact of connection terminals, or burn marks. If so, replace the damaged cable, tighten the connection terminals, or replace the components with burn marks. Re-close the PV DC switch and clear the AFCI fault through the APP, and the device will resume operation. If the above reasons are not the cause and the fault still exists, please submit a fault feedback on the troubleshooting page of the mySigen APP or contact the Sigenergy customer service center.
		ID2	AFCI self-checking circuit 2 fault
		ID3	AFCI self-checking circuit 3 fault
		ID4	AFCI self-checking circuit 4 fault
		ID5	AFCI self-checking circuit 5 fault
		ID6	AFCI self-checking circuit 6 fault
		ID7	AFCI self-checking circuit 7 fault
		ID8	AFCI self-checking circuit 8 fault
		ID9	AFCI self-checking circuit 9 fault
		ID10	AFCI self-checking circuit 10 fault
		ID11	AFCI self-checking circuit 11 fault
		ID12	AFCI self-checking circuit 12 fault
		ID13	AFCI self-checking circuit 13 fault
		ID14	AFCI self-checking circuit 14 fault
		ID15	AFCI self-checking circuit 15 fault
		ID16	AFCI self-checking circuit 16 fault
		ID17	AFCI self-test circuit 17 fault
		ID18	AFCI self-test circuit 18 fault
		ID19	AFCI self-test circuit 19 fault
		ID20	AFCI self-test circuit 20 fault

1021

Code	Name	ID	ID Name	Cause	Repair Suggestion
1021	Inverter AC side voltage abnormal	ID1	AC side overload protection	AC side voltage below threshold.	Excessive load power, reduce load power.
		ID2	AC side short circuit protection	AC side voltage below threshold.	Check if there is a short circuit in the AC output and load. If the fault persists, please go to the Support > troubleshooting page or contact your local service.
		ID3	AC side overvoltage protection	Off grid output voltage greater than threshold.	Generating load power is too large, causing overload, reduce generating load power. Grid overvoltage, please check grid voltage. Generator overvoltage, please check generator voltage.
		ID4	AC side undervoltage protection	AC side voltage below threshold.	Load power is too high causing overload, reduce load power. Gateway inverter side air switch not closed. Grid undervoltage, please check grid voltage. Engine undervoltage, please check engine voltage.
		ID5	AC side overfrequency protection	AC side frequency above threshold.	Inductive load power is too high causing overload, reduce inductive load power. Gateway inverter side air switch not closed. Grid over frequency, please check grid frequency. Engine over frequency, please check engine frequency.
		ID6	AC side underfrequency protection	AC side frequency below threshold.	Capacitive load power is too high causing overload, reduce capacitive load power. Gateway inverter side air switch not closed. Grid under frequency, please check grid frequency. Engine under frequency, please check engine frequency.

1022

Code	Name	ID	ID Name	Cause	Repair Suggestion
1022	Manual operation protection	ID1	EPO protection	The customer presses the rapid shutdown button in emergency.	After confirming that there are no safety hazards at the scene, press the emergency stop button.

1023

Code	Name	ID	ID Name	Cause	Repair Suggestion
1023	Neutral line abnormality in inverter	ID1	Neutral wire disconnected in the inverter	The neutral line in the inverter is not connected or is loose.	Send standby/shutdown command on the APP side, disconnect the grid switch, and wait a few minutes until the device is completely powered off. Check the neutral wire connection of the inverter, check whether the neutral wire is disconnected or loose, and reconnect the wiring. Restore the grid switch and send the startup command.

1024

Code	Name	ID	ID Name	Cause	Repair Suggestion
1024	Abnormal phase sequence	ID1	Abnormal phase sequence of three-phase grid	Abnormal phase sequence of three-phase grid.	Adjust the sequence of the three-phase wiring on the AC output side.

1025

Code	Name	ID	ID Name	Cause	Repair Suggestion
1025	Short circuit to PE	ID1	Three-phase grid is short circuited to the PE	Three-phase grid is short circuited to the PE.	Check if there is a phase-to-ground short circuit on the grid side wiring.

1026

Code	Name	ID	ID Name	Cause	Repair Suggestion
1026	Soft start failure	ID1	Soft start failure	Soft start failure.	If it occurs accidentally, it may be caused by a transient change in the environment. The equipment will return to normal operation after the external environment stabilizes, and no manual intervention is required. If it occurs frequently or cannot be restored for a long time, please contact Sigen customer service center.

1027

Code	Name	ID	ID Name	Cause	Repair Suggestion
1027	Grid frequency unstable	ID1	Grid frequency unstable	Grid frequency change rate does not meet local grid standards.	If it occurs occasionally, it may be caused by instantaneous fluctuation of grid frequency. The equipment will resume normal operation after the grid returns to stability, and no manual intervention is required. If it occurs frequently or cannot be restored for a long time, please check whether the grid frequency is within the range and contact the local power grid operator.

1028

Code	Name	ID	ID Name	Cause	Repair Suggestion
1028	Built-in GATEWAY device failure	ID1	Grid port relay open circuit fault	Internal circuit failure in the equipment.	Send the standby/shutdown command on the App side, disconnect the grid switch, and wait a few minutes until the device is completely powered off. Restore the grid switch and send the power-on command. If the fault persists, please submit a fault report on the APP-support-troubleshooting page.
		ID2	Grid port relay short circuit fault
		ID3	Load port relay open circuit fault
		ID4	Load port relay short circuit fault
		ID5	Neutral point grounding relay open circuit fault
		ID6	Neutral point grounding relay short circuit fault

1029

Code	Name	ID	ID Name	Cause	Repair Suggestion
1029	Built-in GATEWAY wiring abnormal	ID1	Abnormal grid connection phase sequence	Abnormal grid connection.	Stop the power plant operation. Swap the order of any two phases among L1, L2, and L3 at the grid input terminal. If the fault persists, please submit a fault report on the APP-support-troubleshooting page.
		ID2	Abnormal phase sequence in load-side wiring	Abnormal wiring on the load side.	Perform power station wiring inspection. If the fault persists, please submit a fault report on the APP-support-troubleshooting page.
		ID3	AC cable parallel connection abnormality	The phase sequence of the AC side wiring between parallel devices does not correspond.	Check whether the wiring of the device's grid port or load port matches the phase sequence of other parallel devices; If the fault persists, please submit a fault report on the APP-support-troubleshooting page.

1030

Code	Name	ID	ID Name	Cause	Repair Suggestion
1030	Built-in GATEWAY load failure	ID1	Phase A load overvoltage	Low phase A voltage of the load.	Check the load voltage. If the load is abnormal, just wait for the load to return to normal, and the alarm will recover automatically. If the load is normal and does not recover for a long time, check the wiring on the load and inverter sides. If none of the above reasons apply and the fault still exists, please submit a fault report on the APP-support-troubleshooting page.
		ID2	Load phase B overvoltage	Low voltage on phase B of the load.
		ID3	Load phase C overvoltage	Low voltage on phase C load.
		ID4	Phase A undervoltage of load	Low phase A voltage of the load.
		ID5	Load phase B undervoltage	Low voltage on phase B of the load.
		ID6	Load phase C undervoltage	Low voltage on phase C of the load.
		ID7	Overfrequency load	High load voltage frequency.	Check the load frequency. If the load is abnormal, just wait until the load returns to normal, and the alarm will recover automatically; If the load is normal and does not recover for a long time, check the wiring on the load and inverter sides; If the above reasons are excluded and the fault still exists, please submit a fault report on the APP-support-troubleshooting page.
		ID8	Load underfrequency	The load voltage frequency is low.

1031

Code	Name	ID	ID Name	Cause	Repair Suggestion
1031	Built-in GATEWAY port overcurrent	ID1	Overcurrent at grid-side phase A port	Excessive current flows through the A-phase port on the grid side.	If the load power is too high, you can reduce the load power. If there is parallel operation, check whether the cable lengths from the grid to the load for each device are uneven. If they are uneven, you can adjust the cable lengths to make them uniform.
		ID2	Overcurrent at grid-side phase B port	Excessive current flows through the B-phase port on the grid side.
		ID3	Overcurrent at phase C port on the grid side	The current flowing through the C-phase port on the grid side is too large.
		ID4	Overcurrent at phase A port on the load side	Excessive current flows through the A-phase port on the load side.
		ID5	Overcurrent at phase B port on the load side	The current flowing through the B-phase port on the load side is too large.
		ID6	Overcurrent at phase C port on the load side	Excessive current flows through the C-phase port on the load side.

1034

Code	Name	ID	ID Name	Cause	Repair Suggestion
1034	AC terminal over-temperature	ID1	AC terminal over-temperature	AC terminal connection is unreliable.	Check whether the AC terminals are reliably connected. If not, please issue a shutdown command and completely power off the device before adjusting the AC terminal wiring. If the above reasons are not the cause and the fault still exists, please submit a fault feedback on the APP-support-troubleshooting page.

1035

Code	Name	ID	ID Name	Cause	Repair Suggestion
1035	Abnormal PV access location	ID1	PV3 misconnection	The PV access port is an invalid port.	Check whether any PV string is mistakenly connected to an unsupported port. If so, wait until the photovoltaic string current drops below 0.5A, then disconnect the DC switch, adjust the PV wiring, and after adjustment, close the DC switch. If the above is not the cause and the fault still exists, please submit a fault report on the Support > troubleshooting page of mySigenAPP or contact the Sigenergy Customer Service Center.