What to do if Huawei SUN2000-4KTL-L1 shows AFCI Check Failure?
If your Huawei Inverter displays an AFCI Check Failure, turn off the AC output switch and DC input switch, and then turn them on after 5 minutes.
What does Active Islanding mean on my Huawei SUN2000-4KTL-L1?
If your Huawei Inverter is showing Active Islanding, it means that the SUN2000 has proactively detected islanding when the power grid experiences an AC power outage. Check that the grid connection voltage of the SUN2000 is normal.
What to do if my Huawei SUN2000-4KTL-L1 Inverter shows Low Insulation Resistance?
If your Huawei Inverter shows a Low Insulation Resistance error, it indicates a short circuit between the PV array and the ground, or that the ambient air of the PV array is damp, causing poor insulation. First, check the output impedance of the PV array to ground. If there is a short circuit or lack of insulation, rectify it. Second, check that the PE cable of the SUN2000 is correctly connected. Third, if the impedance is lower than the specified protection threshold in rainy and cloudy days, set Insulation resistance protection using the mobile app, SmartLogger, or NMS.
What does Grid-tied/Off-grid Controller Abnormal mean on a Huawei Inverter?
If your Huawei Inverter shows a Grid-tied/Off-grid Controller Abnormal error, it means that the inverter fails to communicate with the Smart Backup Box. 1. Send a shutdown command on the App. Turn off the AC output switch, DC input switch, and battery switch. 2. Check whether the power cable and RS485 cable between the Smart Backup Box and the inverter are normal. 3. After 5 minutes, turn on the battery switch, AC output side, AC output switch, and DC input switch.
How to cool down my Huawei SUN2000-4KTL-L1?
If your Huawei Inverter is overheating, it's likely installed in a poorly ventilated area, the ambient temperature is too high, or the device isn't working correctly. Check the ventilation and ambient temperature around the installation location.
Why is Huawei SUN2000-4KTL-L1 showing Off-grid output overload?
If your Huawei Inverter shows an 'Off-grid output overload' message, the output is either overloaded or short-circuited. Check whether the device output is short-circuited and whether the device load configuration exceeds the rated value.
What to do if Huawei SUN2000-4KTL-L1 Inverter displays Grid Undervoltage?
If your Huawei Inverter displays a Grid Undervoltage alarm: * If the alarm occurs occasionally, the power grid may be temporarily abnormal. The SUN2000 will automatically recover once the power grid returns to normal. * If the alarm occurs frequently, check whether the power grid voltage is within the allowed range. If it is not, contact the local power operator. If it is, modify the grid undervoltage protection threshold via the mobile app, SmartLogger, or network management system (NMS) with the consent of the local power operator. * If the fault persists for a long time, check the connection between the AC switch and the output power cable.
What to do if Huawei SUN2000-4KTL-L1 displays String Reversed?
If your Huawei Inverter displays a String Reversed error, it means the PV string is reversely connected. Check whether the PV string is reversely connected to the SUN2000. If it is, wait until the PV string current decreases below 0.5 A, set the DC switch to OFF, and adjust the PV string polarity.
What to do if my Huawei Inverter showing Overtemperature?
If your Huawei Inverter is showing an Overtemperature warning, it indicates that the unit is installed in a location with poor ventilation, the ambient temperature is too high, or the SUN2000 is not working properly. You should check the ventilation and ambient temperature of the SUN2000 installation position. If the ventilation is poor or the ambient temperature exceeds the upper threshold, improve the ventilation and heat dissipation.
What to do if Huawei Inverter displays DC Arc Fault?
If your Huawei Inverter displays a DC Arc Fault, it means the PV string power cables are arcing or have poor contact. You should check whether the string cables arc or are in poor contact.
General| Max. efficiency | 98.4% |
|---|---|
| Max. input voltage | 600 V |
| Rated output power | 4000 W |
| Dimensions (W x H x D) | 365 x 365 x 156 mm |
| Max. apparent AC power | 4000 VA |
| Nominal AC voltage | 220 V / 230 V / 240 V |
| MPPT voltage range | 200-1000 V |
| Number of MPP trackers | 2 |
| Max. short-circuit current per MPPT | 15 A |
| Operating temperature range | -25°C to +60°C |
| Protection degree | IP65 |
| Max. Input Power | 6000 W |
| Max. Output Power | 4000 W |
| Rated Output Voltage | 220 V / 230 V / 240 V |
| Output Frequency | 50 Hz / 60 Hz |
| Cooling Method | Natural convection |
| AC voltage range | 180 V to 280 V |
Critical safety measures to prevent personal injury.
Safety protocols related to electrical hazards.
Safety considerations for installation environments.
Safety rules for physical handling and installation.
Requirements for choosing a suitable installation site.
Step-by-step installation guide.
Critical safety warnings before electrical connections.
Instructions for safely connecting PE cables.
Procedure for connecting AC output power.
Steps for connecting DC input power cables.
Pre-power-on checks for system integrity.
Step-by-step procedure for powering on the system.
How to configure the SUN2000 using the mobile app.
Procedure for safely powering down the system.
Common faults, causes, and solutions.
Procedures for diagnosing insulation resistance issues.
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