Sungrow SG2-8K solar inverterThe Sungrow SGK-D solar inverter is a good option if you are on a tight budget. This Chinese solar inverter brand offers a standard 5-year warranty on parts and labor plus an additional 5-year parts only warranty. The inverter also allows monitoring of real-time performance through your iPhone or Android phone with the iSolarCloud App.

In case an issue comes up, we have put together a list of error codes, faults and solutions from the Sungrow SG2-8K Solar Inverter user manual. The list describes the fault code and the recommended troubleshooting procedures. When faults occur on the Sungrow SG2-8K-D solar inverter, “Fault” state will be shown in the smartphone application interface.

Please note that the error codes listed below and the inverter user manual are applicable to the following Sungrow inverter models:

  • Sungrow SG2K-S
  • Sungrow SG2K5-S
  • Sungrow SG3K-S
  • Sungrow SG3K-D
  • Sungrow SG5K-D
  • Sungrow SG8K-D

The number on the model code above signifies the kW rating of the inverter with the “S” or “D” signifying whether the inverter has a Single or Dual Maximum Power Point Tracker.

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Sungrow SG5K-D Error Codes 001 to 85 (Applicable for SG2K to SG8K models)

Code Description Troubleshooting
002 Grid over-voltage. The grid voltage exceeds the protective value. (Stage 1)

1. Check the voltage of the grid.

2. If the grid voltage exceeds the permissible range of inverter protection parameters, ask the utility grid company for a solution.

3. If the grid voltage is within the permissible range, contact Sungrow Service Dept.

003 Transient over-voltage.
The grid transient
voltage exceeds
inverter allowable
upper limit.
1. This is a short-term fault due to grid
condition. Wait a moment for inverter
recovery.
2. If the fault persists, please contact
Sungrow Service Dept.
004 Grid under-voltage.
The grid voltage is
below the protective
value. (stage I)
1. Check the grid voltage.
2. If the grid voltage exceeds the
permissible range of inverter protection
parameters, ask utility grid company for
solution.
3. If the grid voltage is within the
permissible range, contact Sungrow Service
Dept.
005 The grid voltage is too low. 1. This is a short-term fault due to grid condition. Wait a moment for inverter recovery.
2. If the fault still exists, please contact Sungrow Service Dept..
006 The AC output current exceeds inverter allowable upper limit. 1. The inverter will resume if the output current falls below the protection value.
2. If the fault still exists, please contact Sungrow Service Dept..
007 Transient AC overcurrent 1. The inverter will self-recover after several seconds.
2. If the fault still exists, please contact Sungrow Service Dept..
008 The grid frequency
exceeds inverter
allowable upper limit.
1. Check the grid frequency.
2. If the grid frequency exceeds the permissible range of inverter protection parameters, ask
utility grid company for solution.
3. If the grid frequency is within the permissible range, contact Sungrow Service Dept..
009 The grid frequency is below the inverter
allowable lower limit.
010 Islanding 1. Check whether AC circuit breaker is triggered.
2. Check whether AC cables are all firmly connected.
3. Check whether grid is not in service.
4. If all conditions are OK and this fault still occurs in the LCD screen, contact Sungrow Service Dept..
011 The DC component of AC current exceeds inverter limit. 1. Wait a moment for inverter recovery.
2. If the fault occurs repeatedly, contact Sungrow Service Dept..
012 A failure current is
detected.
1. Check the PV strings for ground fault.
2. If the fault occurs repeatedly, contact Sungrow Service Dept..
014 The average grid voltage exceeds the permissible range for over 10 minutes. 1. Wait a moment for inverter recovery.
2. Check the voltage of the grid. If the grid voltage exceeds the permissible range of inverter protection parameters, ask utility grid
company for solution.
3. If the fault occurs repeatedly, contact Sungrow Service Dept..
015 The grid voltage exceeds the permissible range 1. Check the model of the AC cables.
2. Wait a moment for inverter recovery.
3. If the grid voltage exceeds the permissible range, ask utility grid company for solution.
4. If the fault occurs repeatedly, contact Sungrow Service Dept..
016 The bus voltage or power is high. 1. Wait a moment for inverter recovery.
2. If the fault occurs repeatedly, contact Sungrow Service Dept..
019 The transient bus voltage is high.  1. Wait a moment for inverter recovery.
2. If the fault occurs repeatedly, contact Sungrow Service Dept..
020 The bus voltage is high. 1. Wait a moment for inverter recovery.
2. If the fault occurs repeatedly, contact Sungrow Service Dept..
021 PV1 input overcurrent is detected Check the layout and the wiring of PV1 input.
022 PV2 input overcurrent is detected 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 placement of inverter is correct.

2. Check whether the inverter operating ambient temperature is more than the range indicated in the specification.

3. Check whether AC output power exceeds the nominal power.

4. If the fault still exists, please contact Sungrow.

037 The internal temperature of inverter is too high
038 Relay fault is detected 1. Wait a moment for inverter recovery.
2. If the fault occurs repeatedly, contact Sungrow Service Dept..
039 The insulation resistance is low. (ISO-flt) 1. Check whether the positive and negative of PV panels is short-circuited with ground lead.
2. Wait a moment for inverter recovery.
3. If the fault occurs repeatedly, contact Sungrow Service Dept..
041 Leakage current self-test abnormality 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.
053 The slave DSP detects that the grid voltage exceeds inverter allowable upper limit. 1. Check the grid voltage.
2. If the grid voltage exceeds the permissible range of inverter protection parameters, ask utility grid company for solution.
3. If the grid voltage is within the
permissible range, contact Sungrow ServiceDept.
054 The slave DSP detects that the grid frequency exceeds inverter allowable upper limit. 1. Check the grid frequency.
2. If the grid frequency exceeds the
permissible range of inverter protection parameters, ask utility grid company for solution.
3. If the grid frequency is within the
permissible range, contact Sungrow Service Dept.
056 The slave DSP detects that the leakage current exceeds inverter allowable
upper limit.
1. Check whether there is a grounded fault of the PV string.
2. If the fault occurs repeatedly, contact Sungrow Service Dept.
059 Communication alarm between master DSP and slave DSP. 1. Wait 1 minute for inverter recovery.
2. If the fault persists, contact Sungrow Service Dept
061 Alarm for no inverter type setting. Contact Sungrow Service Dept.
070 Fans are defective Stop the inverter and disconnect the AC & DC cables. Check whether the fan duct has been blocked. If not, replace fans.
084 Warning for reverse
cable connection of the
Sungrow Meter.
1. Check whether the power cable connections are correct.
2. If “Existing Inverter” is set to “ON” via LCD menu, check and ensure that its rated power is correctly set.
3. For Sungrow single-phase meter, check whether the CT clamp of the 1-phase sensor is correctly placed. Refer to “5.6.1 On the Meter Side”
085 Mismatched software version. Please contact Sungrow Service Dept.

Sungrow SG5K Error Codes 100 to 514 (Applicable for SG2K to SG8K models)

Code Description Troubleshooting
100 The AC output current exceeds the upper limit. 1. The inverter will resume if the output current falls below the protection value.
2. If the fault persists, please contact Sungrow Service Dept.
101 Grid over-frequency.
The grid frequency exceeds the protective value, which is higher  han the protective
value of error 008. (stage II)
1. Check the grid frequency.
2. If the grid frequency exceeds the permissible range of inverter protection parameters, ask utility grid company for solution.
3. If the grid frequency is within the permissible range, contact Sungrow Service Dept.
102 Grid under-frequency.
The grid frequency is below the protective value, which is lower than the protective
value of error 009. (stage II)
106 Abnormal grounding. Neither the PE terminal on the AC connection block nor the second PE terminal on the
enclosure is reliably connected.
Check whether there is a reliable inverter grounding line, if there is access to the ground, and the fault persists, please contact Sungrow Service Dept.
200 Bus hardware over-voltage fault. The bus voltage
exceeds the protective value.
1. Wait for inverter recovery after bus voltage lower.
2. If the fault occurs repeatedly, contact Sungrow Service Dept.
201 The bus voltage is too low. 1. Wait a moment for inverter  recovery.
2. If the fault occurs repeatedly,  contact Sungrow Service Dept.
202 PV hardware over-current fault. The PV1 or PV2 current exceeds the protective value. If the fault occurs repeatedly,  contact Sungrow Service Dept.
203 The PV input voltage exceeds the bus voltage. Check the functionality of the PV
connection terminals.
306 Input and output power
mismatching fault.
If the fault occurs repeatedly, contact Sungrow Service Dept.
315 PV1 current sampling fault. Channel sampling anomaly. Contact Sungrow Service Dept.
316 PV2 current sampling fault.
320 Leakage current sensor fault Contact Sungrow Service Dept.
409 All temperature sensors fail. If the fault occurs repeatedly, contact Sungrow Service Dept.
501 External memory reading/writing warning

1. Inverter can normally be connected to the grid.

2. Power on the inverter again. If the fault persists contact Sungrow Service Dept.

503 Ambient temperature sensor open circuit warning. If the fault occurs repeatedly, contact Sungrow Service Dept.
504 Ambient temperature sensor short circuit warning.
505 Radiator temperature sensor open circuit warning.
506 Radiator temperature sensor short circuit warning.
514 Abnormal communication warning of Sungrow meter. (Inverter can be normally connected to the grid).

1. Check whether the power cable connection of the meter is correct.

2. Check whether the RS485 connection is correct.

For further details please check the Sungrow SG2-8K solar inverter manual’s Troubleshooting section. Should you follow the troubleshooting steps above but the issue is not rectified check if it’s still under warranty, if it is you can contact Sungrow for further assistance. Be ready with the serial number, fault name and code with a brief description of the fault.

If your Sungrow SG2-8K solar inverter is outside the warranty period we suggest that you contact a local solar power expert. If you need further assistance please enter your details in the following form.

Get help from Gold Coast Solar Power Solutions by filling out this solar inverter help form

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