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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
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PCB Board Restoration

Circuit trace restoration using micro-soldering techniques
BGA component replacement on professional rework stations
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Contact pad restoration and repair
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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 inverters SIAC Soleil SIEL

By Erik Zaikin

2 min read

Fault Messages Displayed and Possible Corrective Actions

System Failure: Insulation Failure

Action: Measure the impedance between PV (+) and PV (-) and the earth. It should be above 8MΩ. If within specifications and the insulation detection circuit alarms, replace the system.

Loss Towards Ground

Action: Disconnect the photovoltaic generator, inspect the AC system peripherals. After identifying the issue and reconnecting the photovoltaic source, check the inverter's condition. If the fault persists, a faulty GFCI circuit may require system replacement.

Grid V/Hz KO

Action: Wait 30 seconds for normal conditions to restore for automatic inverter restart. Verify mains voltage and frequency within specs and adjust operating range using Soleil Solar Control. Replace the system if the fault continues.

Mains Rimp KO

Action: If mains impedance exceeds allowed values, wait 30 seconds, recheck, and inspect cables between the inverter and mains. Use larger cables if needed and adjust the impedance parameter with Soleil Solar Control. Replace the impedance circuit if the fault persists.

No Power From Mains

Action: Check the AC connection with a multimeter if the system is not connected to mains. Inspect mains connections, cables, and connectors. Do not close a tripped switch between the inverter and mains; instead, replace the system.

Inverter Failure: PV High Voltage

Action: Measure the open photovoltaic field voltage to ensure it's not above or close to 500 VDC. If significantly below (i.e., < 430 V), compare multimeter readings with displayed values. Replace the unit if the difference is >5%.

M/S Values KO

Action: Displayed when the main and redundant controller readings don't match. Disconnect PV (+) or PV (-) and restart. Replace the system if failure persists.

Inverter Failure

Action: Displayed when the circuit operates incorrectly. Disconnect PV (+) or PV (-) and restart. Replace the system if failure continues.

High Temperature

Action: If the internal temperature exceeds specified values, lower the ambient temperature or relocate the inverter to a cooler location. Replace the temperature sensor if the failure persists.

Note: All features and alarms related to the control of the mains impedance are disabled.

Models: Soleil 10BT 15BT 20BT 25BT 30BT
80TL 80HV-TL 100TL 100HV-TL 125TL
40BT 50BT 60BT 80BT 80 HV-BT 100BT 100HV-BT 125BT 125HV-BT
200 BT
200 HV-BT
250 BT
250 HV-BT
125HV-TL 200TL 200HV-TL 250TL 250HV-TL
330HV-TL 400TL 500TL 500HV-TL
660HV-TL
1500 2000 3000 4000 6000
1F-TL2K
1F-TL3K
1F-TL4K
1F-TL6K
10TL 200TL 250TL 400TL 500TL

We can fix your inverter