Sungrow SH3K6 - Page 77

User Manual 8 Troubleshooting and Maintenance
69
Code
Specification
Troubleshooting
019
Bus over-voltage.
The transient bus voltage
exceeds the upper limit.
Wait a moment for inverter
recovery or restart the system.
021
PV1 over-current.
The input current of PV1
exceeds the upper limit.
1. Check the PV input power and
configuration.
2. Wait a moment for inverter
recovery or restart the system.
022
PV2 over-current.
The input current of PV2
exceeds the upper limit.
024
Neutral point voltage
imbalance.
The deviation of the neutral
point voltage exceeds the
allowable limit.
1. The inverter will recover once
the deviation falls below the
protective limit.
2. Wait a moment for inverter
recovery or restart the system.
028
Reverse polarity of the PV1
connection.
1. Disconnect the DC switch.
2. Check the polarity of the PV
inputs.
3. Reconnect the PV strings if the
polarity is incorrect.
029
Reverse polarity of the PV2
connection.
037
Inner over-temperature fault.
The ambient temperature
inside the inverter exceeds the
upper limit.
1. Check and clean the heat sink.
2. Check whether the inverter is
installed in sunlight or the ambient
temperature of the enclosure
exceeds 45 ℃ . If not, please
contact SUNGROW for a solution.
038
Relay fault on the grid side.
Wait 5 minutes for inverter
recovery or restart the system.
041,
622
Leakage current sampling fault.
Wait 5 minutes for inverter
recovery or restart the system.
043
Inner under-temperature fault.
The ambient temperature
inside the inverter is too low
The inverter will recover once the
ambient temperature rises above
-25℃.
044
INV open-loop self-check fault.
Wait 5 minutes for inverter
recovery or restart the system.
045
PV1 boost circuit fault.
046
PV2 boost circuit fault.
048
Phase current sampling fault.
051
Load overpower fault in the
off-grid mode.
If the fault persists, disconnect
some non-key loads.
052
INV under-voltage fault in the
off-grid mode.
Wait 5 minutes for inverter
recovery or restart the system.
062
DI fault of the backup box
STB5K.
1. Check whether the DI
connection between the inverter
and the backup box is correct.
2. Wait 5 minutes for inverter
recovery.
063
The version of CPLD (complex
Power off the system and program