What to do if Huawei Inverter shows AFCI self-check failure?
If your Huawei Inverter shows an AFCI self-check failure, turn off both the AC output switch and the DC input switch. Wait for 5 minutes, then turn them back on. If the alarm continues, contact Huawei technical support.
What does grid overfrequency mean on my Huawei Inverter?
A grid overfrequency alarm on your Huawei Inverter means the power grid frequency is too high, exceeding local power grid code requirements. If the alarm is occasional, it may be a temporary grid issue, and the inverter should recover automatically. If it persists, check if the grid frequency is within the acceptable range and contact the local power operator if it isn't. If the frequency is normal, you can modify the grid overfrequency protection threshold using the app, SmartLogger, or NMS, with the local power operator's consent.
What does Grid Overfrequency mean on a Huawei Inverter?
A Grid Overfrequency alert on your Huawei Inverter indicates a power grid exception where the actual grid frequency is higher than the requirement of the local power grid standard. If the alarm occurs accidentally, it could be a temporary grid issue, and the inverter should recover automatically. If it occurs frequently, check if the grid frequency is within the acceptable range. If it is not, contact the local power operator. If it is, log in to the mobile phone app, SmartLogger, or NMS to modify the grid underfrequency protection threshold with the consent of the local power operator.
What does Abnormal Grounding mean on a Huawei Inverter?
Abnormal Grounding on your Huawei Inverter means that the neutral wire or ground cable isn't connected, or the PV array is grounded but the inverter output doesn't connect to an isolation transformer. Power off the inverter (turn off the AC output switch and DC input switch, and wait for 5 minutes), and then: 1. Check that the PE cable for the inverter is connected properly. 2. If the inverter is connected to the TN power grid, check whether the N cable is properly connected and whether the voltage to ground is normal. 3. Check whether the AC output connects to an isolation transformer. If it does, after powering on the inverter, log in to the mobile phone app, SmartLogger, or NMS and disable Grounding inspection.
Why is my Huawei SUN2000 showing 'High string input voltage'?
The 'High string input voltage' error on your Huawei Inverter means the PV array isn't configured correctly. There are too many PV modules connected in series, causing the PV string open-circuit voltage to exceed the inverter's maximum operating voltage. To fix this, reduce the number of PV modules connected in series until the PV string open-circuit voltage is at or below the maximum inverter operating voltage. The alarm should then disappear.
What does Transient AC Overvoltage mean on Huawei SUN2000?
If your Huawei Inverter detects 'Transient AC Overvoltage,' it means the phase voltage exceeds the transient AC overvoltage protection threshold. First, check if the grid connection voltage exceeds the upper threshold and contact the local power operator if it does. If you've confirmed the voltage exceeds the threshold and have the power operator's consent, modify the overvoltage protection threshold. Also, check that the peak grid voltage doesn't exceed the upper threshold.
How to resolve Overtemperature on Huawei SUN2000 Inverter?
If the Huawei Inverter is showing an 'Overtemperature' warning, it means the installation location has poor ventilation. Check the ventilation and ambient temperature around the SUN2000. If ventilation is poor or the temperature is too high, improve ventilation and heat dissipation.
How to resolve high string input voltage on a Huawei Inverter?
A high string input voltage error on your Huawei Inverter means the PV array isn't properly configured, with too many PV modules connected in series, causing the PV string open-circuit voltage to exceed the inverter's maximum operating voltage. Reduce the number of PV modules connected in series until the PV string open-circuit voltage is at or below the inverter's maximum. The alarm should then disappear.
How to fix low insulation resistance on Huawei Inverter?
A low insulation resistance error on your Huawei Inverter indicates a short circuit between the PV array and PE, or that the PV string has been in a moist environment for a long time, leading to poor insulation to ground. To resolve this: * Check the impedance between the PV string and the PE cable for shorts and fix them. * Ensure the inverter's PE cable is correctly connected. * If the low impedance is confirmed in cloudy or rainy conditions, adjust the insulation resistance protection threshold via the app, SmartLogger, or NMS.
What to do if Huawei SUN2000 shows grid loss?
If your Huawei Inverter displays a grid loss error, it means the power grid is down, the AC circuit is disconnected, or the AC switch is off. The alarm should clear automatically once the power grid recovers. You should also check if the AC circuit is disconnected or the AC switch is turned off.
General safety statements and precautions for equipment operation.
Outlines qualifications and training required for personnel.
Grounding requirements and general electrical safety precautions.
Lists tools and PPE needed for installation.
Guidelines for selecting the optimal installation location.
Process of installing the mounting bracket for the inverter.
Step-by-step guide to safely install the solar inverter.
Essential safety precautions before making electrical connections.
Procedure for connecting DC input power cables.
Procedure for connecting the AC output power cable.
Acceptance criteria to verify before powering on the inverter.
Procedure and precautions for powering on the inverter.
Using the SUN2000 mobile app for inverter management.
Procedures for safely shutting down and powering off the inverter.
Common alarms, causes, and troubleshooting measures.
Instructions for replacing a faulty fan unit.
Lists input voltage, current, and MPPT specifications.
Lists output power, voltage, current, and frequency.
General| Max Efficiency | 98.6% |
|---|---|
| MPPT Efficiency | 99.9% |
| Protection Rating | IP65 |
| Max. DC Voltage | 1100 V |
| Rated AC Frequency | 50 Hz / 60 Hz |
| Rated Power | 3kW - 10kW |
| Operating Temperature Range | -25 °C ~ +60 °C |
| Communication | RS485 |
| Rated AC Power | 3kW - 10kW |
| Power Factor Adjustment Range | 0.8 leading to 0.8 lagging |
| Total Harmonic Distortion (THD) | ≤ 3% |
| Protection | DC reverse polarity |
| Cooling | Natural convection |
| DC Connection | MC4 |
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