In the event of Fault Codes 020, 025, 101, 202 or 320 being informed through the App, the following corrective measures shall be taken:
Code 020, 25 (Device abnormal):
Fault name | Device abnormal (Code 020/025) |
Fault type | Failure shutdown |
Fault condition | 1. Internal module of the system is abnormal. 2. Related cable connection or terminal of the system is abnormal. |
Steps and method of troubleshooting | Wait for the inverter to return to normal. Disconnect the AC and DC switches, and reconnect the AC and DC switches 15 minutes later to restart the inverter. If the fault still exists, please contact Sungrow Service. |
Code 101 (Grid high frequency):
Fault name | Grid High Frequency (Code 101) |
Fault type | Failure shutdown |
Fault condition | 1. Internal module of the system is abnormal. 2. Related cable connection or terminal of the system is abnormal. |
Steps and method of troubleshooting | Wait for the inverter to return to normal. Disconnect the AC and DC switches, and reconnect the AC and DC switches 15 minutes later to restart the inverter. If the fault still exists, please contact Sungrow Service. |
Code 202 (PV hardware overcurrent fault):
Fault name | PV hardware overcurrent fault (Code 202) |
Fault type | Failure shutdown |
Fault condition | 1. Internal module of the system is abnormal. 2. Related cable connection or terminal of the system is abnormal. |
Steps and method of troubleshooting | Wait for the inverter to return to normal. Disconnect the AC and DC switches, and reconnect the AC and DC switches 15 minutes later to restart the inverter. If the fault still exists, please contact Sungrow Service. |
Code 320 (Leakage current CT self-check fault):
Fault name | Leakage current CT self-check fault (Code 320) |
Fault type | Failure shutdown |
Fault condition | 1. Internal module of the system is abnormal. 2. Related cable connection or terminal of the system is abnormal. |
Steps and method of troubleshooting | Wait for the inverter to return to normal. Disconnect the AC and DC switches, and reconnect the AC and DC switches 15 minutes later to restart the inverter. If the fault still exists, please contact Sungrow Service. |
For further information, please download the user manual here.
This manual is intended for professional technicians who are responsible for installation, operation, maintenance and troubleshooting of inverters, and users who need to check inverter parameters. The inverter must only be installed by professional technicians.
The professional technician is required to meet the following requirements:
Know electronic, electrical wiring and mechanical expertise, and be familiar with electrical and mechanical schematics.
Have received professional training related to the installation, commissioning and troubleshooting of electrical equipment.
Be able to quickly respond to hazards or emergencies that occur during installation, commissioning and troubleshooting.
Be familiar with local standards and relevant safety regulations of electrical systems.
Read this manual thoroughly and understand the safety instructions related to operations.