Huawei SUN2000L Solar Inverters
Huawei entered the solar inverter market in 2013. Huawei sold mainly to China and the wider Asian and European markets and are relatively unknown in Australia.
The Huawei SUN2000L inverter range (2 – 5kW) are compact and have the ability to function as a stand alone string inverter with partial or full panel optimisation. The SUN2000L inverters have a built-in DC coupling battery interface which is compatible with LG Chem RESUH batteries. Please note that it does not have Emergency Power Supply so in the event of a blackout your lights will not stay on.
Huawei SUN2000L inverters come with a standard 5 year warranty
If you experience an issue on a Huawei Solar Inverter, the manual shutdown procedure is useful in fixing some errors. There are also other faults that require other procedures.
Huawei Solar Inverter data sheet
For convenience, we have put together a list of error messages, possible causes and remedies.
Alarm severities are defined as follows:
- Major: The SUN2000L enters Shutdown mode and disconnects from the power grid to stop generating power after a fault occurs.
- Minor: Some components are faulty but the SUN2000L can still connect to the power grid and generate power.
- Warning: The SUN2000L output power decreases due to external factors.
| Alarm ID | Alarm Name | Alarm Severity |
Possible Cause | Suggestion |
|---|---|---|---|---|
| 2001 | High String Input Voltage |
Major | The PV array is incorrectly configured. Excessive PV modules are connected in series to the PV string, and therefore the open-circuit voltage exceeds the maximum inverter input voltage. |
Reduce the number of PV modules connected in series to the PV string until the PV string open-circuit voltage is less than or equal to the maximum inverter input voltage. After the PV array is correctly configured, the inverter alarm disappears. The following is the mapping between PV strings and alarm cause IDs: – Cause ID 1: string 1 – Cause ID 2: string 2 Contact your installer |
| 2011 | String Reversed | Major | The PV string is reversely connected. |
Check whether the PV string is reversely connected to the SUN2000L. If so, wait until the solar irradiance declines at night and the PV string current reduces to below 0.5 A. Then, turn off the DC switch and correct the PV string polarity. The following is the mapping between PV strings and alarm cause IDs: – Cause ID 1: string 1 – Cause ID 2: string 2 Contact your installer |
| 2032 | Grid Failure | Major | Cause ID = 1 – The power grid experiences an outage. – The AC circuit is disconnected or AC switch is off. |
1. Check the AC voltage.
2. Check that the AC power cable is connected and that the AC switch is ON. |
| 2033 | Grid Undervoltage | Major | Cause ID = 1 The grid voltage is below the lower threshold or the low voltage duration has lasted for more than the value specified by LVRT. |
1. If the alarm occurs accidentally, the power grid may be abnormal temporarily. The SUN2000L automatically recovers after detecting that the power grid becomes normal.
2. If the alarm occurs frequently, 3. If the fault persists for a long |
| 2034 | Grid Overvoltage | Major | Cause ID = 1 The grid voltage exceeds the higher threshold or the high voltage duration has lasted for more than the value specified by HVRT. |
1. Check whether the grid connection voltage exceeds the upper threshold. If so, contact the local power operator.2. If you have confirmed that the grid connection voltage exceeds the upper threshold and obtained the consent of the local power operator, modify the overvoltage and undervoltage protection thresholds.3. Check whether the peak grid voltage exceeds the upper threshold. |
| 2035 | Grid Overfrequency | Major | Cause ID = 1 Power grid exception: The actual grid frequency is higher than the local power grid standard. |
1. If the alarm occurs accidentally, the power grid may be abnormal temporarily. The SUN2000L automatically recovers after detecting that the power grid becomes normal.
2. If the alarm occurs frequently, |
| 2037 | Unstable Grid Frequency |
Major | Cause ID = 1 Power grid exception: The actual grid frequency change rate does not comply with the local power grid standard. |
1. If the alarm occurs accidentally, the power grid may be abnormal temporarily. The SUN2000L automatically recovers after detecting that the power grid becomes normal.
2. If the alarm occurs frequently, |
| 2039 | Output Overcurrent |
Major | Cause ID = 1 The grid voltage drops dramatically or the power grid is short-circuited. As a result, the inverter transient output current exceeds the upper threshold and therefore the inverter protection is triggered. |
1. The SUN2000L monitors its external working conditions in real time. The SUN2000L automatically recovers after the fault is rectified.2. If the alarm occurs frequently and affects the power production of the PV plant, check whether the output is short-circuited. If the fault persists, contact your supplier. |
| 2040 | Output DC Component Overhigh |
Major | Cause ID = 1 The DC component of the SUN2000L output current exceeds the specified upper threshold. |
1. The SUN2000L monitors its external working conditions in real time. The SUN2000L automatically recovers after the fault is rectified.2. If the alarm occurs frequently, contact your supplier. |
| 2051 | Abnormal Residual Current |
Major | Cause ID = 1 The insulation impedance of the input side to PE decreases when the SUN2000L is operating |
1. If the alarm occurs accidentally, the external power cable may be abnormal temporarily. The SUN2000L automatically recovers after the fault is rectified.
2. If the alarm occurs frequently or persists, check whether the |
| 2061 | Abnormal Grounding |
Major | Cause ID = 1 – The PE cable for the SUN2000L is not connected. – The voltage between the SUN2000L neutral wire and ground exceeds the upper threshold. |
1. Check that the PE cable for the SUN2000L is connected properly.2. Check that the voltage between the SUN2000L neutral wire and ground is within the normal range. If an isolation transformer is connected, set OFF due to abnormal grounding to Disable by referring to 7.4.5.3 Feature Parameters. |
| 2062 | Low Insulation Resistance |
Major | Cause ID = 1 – The PV string is short-circuited to PE. – The PV string is installed in a moist environment for a long time. |
1. Check the impedance between the PV array output and PE, and eliminate short circuits and poor insulation points.2. Check that the SUN2000L PE cable is correctly connected.3. If you confirm that the impedance is less than the default value in a cloudy or rainy environment, reset Insulation resistance protection. |
| 2063 | Overtemperature | Major | Cause ID = 1 – The SUN2000L is installed in a place with poor ventilation. – The ambient temperature exceeds the upper threshold. – The SUN2000L is not working properly. |
1. Check the ventilation and ambient temperature at the SUN2000L installation position.2. If the ventilation is poor or the ambient temperature exceeds the upper threshold, improve the ventilation and heat dissipation.3. If both the ventilation and ambient temperature meet requirements, contact your supplier. |
| 2064 | Device Fault | Major | Cause ID = 1–12 An unrecoverable fault occurs on a circuit inside the SUN2000L. |
Turn off the AC output switch and DC input switch, and then turn them on after 5 minutes. If the fault persists, contact your supplier. |
| 2065 | Upgrade Failed | Major | Cause ID = 1–4 The upgrade does not end normally. |
1. Perform an upgrade again.
2. If the upgrade fails several times, contact your supplier. 3. Check that the DC power supply is connected. |
| 61440 | Monitoring Unit Faulty |
Minor | Cause ID = 1 The communication module is faulty. |
Contact your supplier to rectify the fault. |
| 2067 | Faulty Power Collector |
Major | Cause ID = 1 – In Grid Connection with Zero Power mode, the energy meter communication is interrupted. – In Maximum Use of Self-Produced Power mode, the energy meter communication is interrupted. |
1. Check that the preset energy meter model is the same as the actual model.2. Check that the preset communications parameters for the energy meter are the same as the actual configurations.3. Check that the energy meter is powered on and the RS485 communications cable is correctly connected. |
| 2068 | Battery Abnormal | Minor | Cause ID = 1 – The battery is faulty. – The battery communication is interrupted. – The battery switch trips when the SUN2000L is running. |
1. Check that the communications cable and power cable between the SUN2000L and the battery are properly connected.2. Check that the battery switch is turned on properly.3. Turn off the AC output switch, DC input switch, and battery switch, and then turn them on after 5 minutes. If the fault persists, contact your supplier. |
| 2075 | Peripheral Port Short Circuit | Warning | Cause ID = 1 The SUN2000L Alarm port is short-circuited when supplying 12 V power to peripheral. |
1. Turn off the AC and DC switches on the SUN2000L and disconnect the peripheral from the Alarm port. Then power on the SUN2000L again and clear the alarm manually. If the alarm persists, contact your supplier to rectify the fault. If the alarm is cleared, it indicates that the port on the SUN2000L is normal. Then check that the pins in the power port on the peripheral are not short-circuited.2. Replace the peripheral, and then start a self-check to check that the port functions properly. |
If you need more information, the full details are available in the Huawei Solar Inverter manual’s Troubleshooting section. Check if your Huawei Solar Inverter is still within the warranty period so you can contact the equipment installer or supplier for repair if the error continues. If your inverter is outside the warranty period we suggest that you contact a professional solar power expert. If you’re in the Gold Coast or Brisbane area, contact Gold Coast Power Solutions and we will be in touch to provide you with further assistance.
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