Sungrow SG8K-D - Page 65

User Manual 8 Troubleshooting and Maintenance
57
Code
Description
Troubleshooting
021 PV1 input over-current.
Check the layout and the wiring of PV1
input.
022 PV2 input over-current.
Check the layout and the wiring of PV2
input.
028
PV1 reverse
connection.
Check the cable connections of PV1.
029
PV2 reverse
connection.
Check the cable connections of PV2.
036
The temperature of
radiator is too high.
1. Check whether the ambient temperature
shown on the screen is too high. Wait a
moment for inverter recovery.
2. Check whether there is enough space for
convection.
3. Check whether the inverter is in direct
sunlight.
4. Check whether the fan is normal.
Replace it if necessary.
5. Clean the air inlets.
6. If the fault persists, please contact
Sungrow.
037
The internal
temperature of inverter
is too high.
038
Relay fault on the grid
side.
1. Wait a moment for inverter recovery.
2. If the fault occurs repeatedly, contact
Sungrow Service Dept.
039
The insulation
resistance
of PV to
earth is low. (ISO-flt)
1. Check whether there is a reliable inverter
grounding line.
2. Check whether one of the PV strings is
short-circuited with ground.
3. Wait a moment for inverter recovery.
4. If the fault occurs repeatedly, contact
Sungrow Service Dept.
041
Leakage current
sampling fault.
1. Wait a moment for inverter recovery.
2. If the fault occurs repeatedly, contact
Sungrow Service Dept.
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
Inverter self-test fault.
1. Wait a moment for inverter recovery.
2. If the fault occurs repeatedly, contact
Sungrow Service Dept.
045
PV1 boost circuit
fault.
046
PV2 boost circuit
fault.
048
Phase current
sampling fault.