These faults apply to the following sungrow products:
SBR096/128/160/192/224/256
SBH100/150/200/250/300/350/400
SH3.0RS/SH3.6RS/SH4.0RS/SH5.0RS/SH6.0RS
SH5.0RT/SH6.0RT/SH8.0RT/SH10RT
SH5T/6T/8T/10T/12T/15T/20T/25T
In the event of Fault Codes 703, 711, 712, 715, 732, 733, 734, 735, 736, 739 being informed through the App, the following corrective measures shall be taken:
Code 703 (Low average battery voltage fault):
Fault name | Low average battery voltage fault (Code 703) |
Fault type | Failure shutdown |
Fault condition | The fault is caused by battery abnormity, operating environment or inappropriate operation performed on the battery. |
Steps and method of troubleshooting | 1. In case of battery voltage fault, check whether the battery real-time voltage is abnormal. If so, please contact the battery manufacturer. If not, please contact SUNGROW. 2. In case of battery temperature fault, take measures to improve heat dissipation performance and lower the temperature. 3. If the fault persists, please contact Sungrow Service. |
Code 711 (Instantaneous battery overvoltage fault)
Fault name | Instantaneous battery overvoltage fault (fault code: 711) |
Fault type | Malfunction |
Fault condition | When the inverter is not in standby/fault/power-off states, the BDC voltage is 10V+ higher than the limited charge voltage for 125s. |
Steps and method of troubleshooting | Keep the BDC voltage 10V- lower than the limited charge voltage for 2s. |
Code 712 (Average battery overvoltage fault)
Fault name | Average battery overvoltage fault (fault code: 712) |
Fault type | Malfunction |
Fault condition | In non-uniform charge mode, the battery port voltage 3V+ higher than the limited charge voltage for 1.5s. |
Steps and method of troubleshooting | Keep the battery voltage 1V lower than the limited charge voltage for 5s. |
Code 715 (Battery hardware overvoltage fault)
Fault name | Battery hardware overvoltage fault (fault code: 715) |
Fault type | Malfunction |
Steps and method of troubleshooting | 1. If the battery voltage is abnormal, check whether the connection of the battery power cables is abnormal (reverse connection, looseness, etc.) If yes, please connect the battery power cord correctly. 2. Check whether the battery power cord is connected correctly, and whether the real-time voltage of the batteries is abnormal. |
Code 732 (Overvoltage protection)
Fault name | Overvoltage protection (fault code: 732） |
Fault type | Fault |
Fault condition | The alarm is triggered when the voltage of battery cell is greater than the overvoltage protection threshold. |
Steps and methods of troubleshooting | 1. If overvoltage trips off the miniature circuit breaker (MCB) during the charging of the battery system, please stop charging mode and wait for 5-10min, then close the battery MCB again to start the inverter. If it runs normally, export the battery log data for overvoltage analysis. 2. If the MCB still trips, please replace the module, start the switch box and export the battery operation and fault record for problem analysis. |
Code 733 (Overtemperature protection)
Fault name | Overtemperature protection (fault code: 733） |
Fault type | Fault |
Fault condition | The alarm is triggered when system temperature is above the overtemperature protection threshold. |
Steps and methods of troubleshooting | 1. Check whether the ambient temperature of the inverter is too high and whether the inverter/battery is in a place with good ventilation. 2. Check whether the inverter/battery is under direct sunlight. If so, please shade it properly. 3. Measure whether the temperature in the module is consistent with the output temperature of BMU sampling, if not, the BMU sampling is abnormal. Contact SUNGROW Service for further assistance. |
Code 734 (Low temperature protection)
Fault name | Low temperature protection (fault code: 734） |
Fault type | Fault |
Fault condition | The alarm is triggered when system temperature is below the low temperature protection threshold. |
Steps and methods of troubleshooting | 1. Check whether the ambient temperature is lower than the low temperature protection threshold and restart or close the battery system when the temperature rises to the operating temperature range of the system. 2. Measure whether the temperature in the module is consistent with the output temperature of BMU sampling, if not, the BMU sampling is abnormal. Contact SUNGROW Service for further assistance. |
Code 739 (Undervoltage protection)
Fault name | Undervoltage protection (fault code: 739） |
Fault type | Fault |
Fault condition | The alarm is triggered when the voltage of battery cell is less than the low-voltage protection threshold. |
Steps and methods of troubleshooting | 1. Check whether the battery is overcharged or in standby and not charged for a long time.* 2. Export the battery running log under if running state can be restored, and analyse the running state before the battery failure 3. Measure whether the unit/total voltage of the module is consistent with the output voltage of BMU, if not, the BMU sampling is abnormal. Contact SUNGROW Service for further assistance. |
*If possible, measure the voltage of each of the battery modules to ensure all module have the same voltage +- 0.5V. If the difference is higher 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.