BOARD REPAIR, NOT REPLACEMENT

We restore original components at micro-level, saving up to 70% compared to replacement costs — professional diagnostics right here in Casalmaggiore.

12 MONTHS FULL WARRANTY

The only service in Italy offering a complete year warranty on repaired solar inverters — your guarantee of long-lasting performance and peace of mind.

RAPID ENERGY RESTORATION

Get your inverters back online within 24-48 hours with complete testing — every day your solar system is down means lost revenue.

We will Solve any problem with inverter

When your inverter shows persistent error codes that others can't fix, we step in. Our specialized repair techniques resolve the most challenging inverter faults - from ground isolation errors to DC injection problems. Check our comprehensive list of successfully repaired error conditions.

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Photovoltaic Inverter Repair & Diagnostics

In-depth diagnostics of inverter failures — including internal explosions, burnt PCBs, and severe hardware faults
Root-cause analysis using oscilloscopes, logic analyzers, and load simulations
Detection and elimination of software-related faults: EEPROM corruption, firmware bugs, and error code resolution
Repair of MPPT modules, power stages, gate drivers, and signal path anomalies
Troubleshooting of grid synchronization, DC link stability, and AC waveform distortion
Detailed failure reports, waveform captures, and high-resolution photos of defective areas

Inverter Component Restoration & Upgrades

Replacement of IGBTs, MOSFETs, optocouplers, control ICs, and passive components
Micro-soldering and trace repair for severely damaged circuit boards
Custom replacement of rare or obsolete components using 3D-printed or CNC-machined parts
Rebuilding of cooling systems: fan units, thermal paste, and heat sink realignment
Reinforcement against future failures: conformal coating, transient suppression modules, and enhanced insulation paths
Optional firmware optimization for extended inverter lifespan and better grid behavior
Includes post-repair testing, load simulation, and full technical documentation with results

Advanced Inverter Diagnostics

Complete diagnostics using professional Fluke and Tektronix equipment
Electrical parameter analysis with 0.1% precision accuracy
Thermal imaging diagnostics to detect hidden defects
Insulation and grounding testing according to VDE standards
Detailed report with photographic documentation of all problem areas

Control Board Reprogramming

Factory firmware restoration for all inverter brands
EEPROM and Flash memory programming
Software adaptation for specific operating conditions
Firmware updates to latest versions
Original settings backup and recovery

PCB Board Restoration

Circuit trace restoration using micro-soldering techniques
BGA component replacement on professional rework stations
CPU and microchip reballing services
Contact pad restoration and repair
Protective coating application against corrosion

Final Quality Testing

Complete safety function verification
Overload condition testing
Calibration of all measurement circuits
Quality certificate with comprehensive test protocols

List of errors on the inverter AEG

Por Erik Zaikin

4 min de lectura

Models

PROTECT PV, PV8, PV10, PV12,5, PV15, PV25, PV33, PV-RS, PV-SOZ-03, PV-LGR, AS-IC01-4000, AS-IC01-4000-2, AS-IC01-5000, AS-IC01-5000-2, AS-IC01-6000-2, AS-IC01-8000-2, AS-IC01-10000-2, PLUS S500, PV1500, PV2000, PV2800, PV4600, PV5000, PV6000

**Troubleshooting your PV-Inverter**

The PV-Inverter requires little maintenance. When an unexpected situation occurs, please refer to the following table. If the table is insufficient, please call your local dealer.

**Fault Message Diagnosis and Solutions:**

**1. System Fault**
- **Isolation Fault**
- Check the impedance between PV (+) & PV (-) and ground. The impedance should be larger than 8 Mohm.
- If the check fails, or the impedance is below 8 Mohm, please call the service.

- **Ground I Fault**
- This is caused by too high ground current.
- Unplug the PV panels from the DC-input, check the AC peripheral system.
- After the cause is cleared, plug PV panels in again and check the status of the inverter.
- If above actions cannot clear Ground I fault, please call service.

- **Grid Fault**
- Wait for 1 minute for the grid to come back to normal.
- Make sure Grid voltage and Frequency meet the specifications.
- If not, please call service.

- **Impedance Fault**
- Grid impedance higher than the permissible value.
- Observe the faulty condition for 1 minute.
- If it does not restore to normal, check the wires between inverter and grid. If necessary, replace with wires with bigger cross-section.
- Adjust impedance parameter using the Protect PV EZ control.
- If above actions are in vain, please call service.

**2. Inverter Failure**
- **PV Over Voltage**
- Check open PV voltage, if it is too close to or over 750 VDC.
- If PV voltage is less than 750 VDC and the problem still occurs, please call service.

- **Consistent Fault**
- Disconnect PV(+) and PV(-) from the input, start the unit again.
- If it does not work, please call service. SCI Failure.

- **Over Temperature**
- The internal temperature is higher than the specified normal value.
- Reduce the ambient temperature by appropriate and effective activities.
- Or move the inverter to a cooler location.
- If it does not work, please call service.

- **Relay Failure**
- Disconnect PV(+) and PV(-) from the input, start the unit again.
- If it does not work, please call service.

- **DC INJ High**
- Input DC current is higher than the permissible value.
- Observe the faulty condition for 1 minute.
- If the system does not restore to normal operation, please call service.

- **EEPROM Failure**
- Disconnect PV(+) and PV(-) from the input, start the unit again.
- If the system does not restore to normal operation, please call service.

- **High DC Bus**
- Disconnect PV(+) and PV(-) from the input, start the unit again.
- Check if L-LINE and N-Neutral are mistakenly connected.
- If so, please call service.

- **Low DC Bus**
- Disconnect PV(+) and PV(-) from the input, start the unit again.
- If the system does not work, please call service.

- **Ref 2.5 V Fault**
- No specific instructions are provided in the text. Refer to the manual or contact service for this issue.

- **DC Sensor Fault**
- Like the Ref 2.5 V Fault, details for diagnosing and resolving this fault are not outlined. Consult the manual or contact service.

- **GFCI Failure**
- Indicates a fault with the Ground Fault Circuit Interrupter. Check the manual or contact service for troubleshooting.

This completes the structured overview of the "Troubleshooting your PV-Inverter" section, covering the diagnosis and solutions for various inverter faults.

**3. Ref 2.5 V Fault**
- Specific details regarding the diagnosis and solutions for this fault are not provided in the given text. It's recommended to refer to the inverter's manual or contact service for guidance.

**4. DC Sensor Fault**
- Like the Ref 2.5 V Fault, specific details for diagnosing and resolving this fault are not outlined in the provided text. Check the inverter's manual or consult with service for further instructions.

**5. GFCI Failure**
- This fault pertains to the Ground Fault Circuit Interrupter (GFCI).
- If this fault occurs, it typically indicates an issue with the inverter's ability to detect and protect against ground faults.
- As with the previous faults, detailed steps for diagnosis and resolution are not provided in the text. It's advisable to refer to the inverter’s manual or reach out to a professional service for troubleshooting this issue.

**General Troubleshooting Tips:**
- For all types of faults, a general approach includes checking connections, ensuring compatibility with grid specifications, and resetting or restarting the inverter.
- Regular maintenance checks can prevent many issues and ensure the inverter operates efficiently.
- In cases where the provided table or manual does not offer a clear solution, or if the inverter continues to display fault messages despite troubleshooting, it is crucial to contact your local dealer or a professional service for assistance. They can provide expert advice, service, or replacements as needed.

**Safety Precautions:**
- Always ensure that all safety procedures and guidelines are followed when handling electrical equipment.
- If you are unsure or uncomfortable with performing any troubleshooting steps, it is better to seek professional help to avoid the risk of injury or damage to the equipment.

We can fix your inverter