Upon arrival at the Laboratory, the INVERTER is unpacked by an initial trained technician who performs a visual check in order to detect any external damage caused by transport and verifies the correspondence of the data on the ticket.
The technician then proceeds to open the equipment to carefully inspect all components.
If problems such as broken connectors, damage to the casing, broken boards, fire damage, or the presence of additional or mismatched parts emerge, our service department will contact the customer and provide a detailed report on the anomalies found.

Once the acceptance phase has passed, the inverter is filed and each step tracked.
The second step takes it to the testing area for a DIAGNOSIS under load, meaning the inverter is put into operation to perform a series of tests designed to confirm the defect reported by the customer and identify possible secondary or additional problems.
This method is designed to provide the repair technician with a detailed picture of the condition of the inverter, thus facilitating and speeding up the subsequent repair steps.

In the case of REPAIR, the inverter is handed over to the product specialist.
The repair process consists of three main stages:
1) the REPAIR of the failed components is carried out;
2) by means of a PRE-LAUNCH, the successful completion of the repair is verified;
3) the inverter returns to the laboratory for a COMPLETE EXAMINATION of all components.
This step is crucial because, unlike remanufacturing, the repair focuses only on the specific fault and to ensure the time of coverage of the issued warranty, all other components must have an acceptable level of wear and tear.
In case of abnormal wear and tear, our service department will contact the customer and propose remanufacturing or replacement of the components above the threshold.

In case this is the customer’s choice, or a mandatory condition due to extraordinary failures, REGENERATION, unlike repair, is a process that invests all components of the equipment ultimately making it MORE RESILIENT thanks to equivalent but more modern components.
The process consists of three main steps:
1) REPAIR of the failed components is carried out;
2) by means of a PRE-COLLAUDING, the successful completion of the repair is verified;
3) REGENERATION, once the successful completion of the repair is ascertained, we move on to replace all SENESCENT components that have reached, or are reaching, the end of their useful life (e.g. capacitors, sensors), flushing and tropicalization of all electronic boards, replacement of worn electromechanical parts (e.g., bearings, fans, contactors, screws, etc.), eventual sandblasting of copper bars, aluminum, and mechanical parts that show rust to finish with eventual painting.

FIMER’s R series is a range of solar inverters designed specifically for large PV farms.
A key component of these inverters is the IGBT POWER STACK, which includes capacitors, IGBT modules, and a large GATE UNIT that manages their operation.
However, the GATE UNIT is often the critical point that causes the most damage to the Power Block.

Despite the fact that our test system involves power testing with the IGBT POWER STACK mounted directly on the inverter in our laboratory, it has been found that, in some cases, the GATE UNIT subjected to certain alarms or typical field problems (which cannot be reproduced in the laboratory) fails to lock the solar converter.
This problem is due to faulty electronic components in the GATE UNIT that occur only under specific conditions, sometimes causing explosions.

To address this problem, our R&D department designed, built, programmed, and commissioned a test bench specifically for the R-series GATE UNIT boards. This system, controlled through a PLC, simulates all operating conditions, working on the inputs and outputs of the board.
The test is able to verify 100 percent correct operation of the board, issuing a detailed report.
In case of defects, the system identifies the problem and when it occurs, greatly facilitating repair.

The introduction of this additional test, in addition to the load testing of the FIMER R SERIES solar converter, has enabled the units to be repaired or remanufactured with 100% guaranteed success.

The testing of this special solar converter consists of two phases:
A) as extensively explained in the GATE UNIT LINK section, it is tested on its own on a special bench that simulates all its conditions until a 100% positive report is obtained,
B) a specialized operator, other than the repair technician, provides the IGBT POWER STACK to the solar inverter which, connected to our DC system that simulates the solar tracking of a typical day, pushes the equipment to its maximum performance (even up to 24h).
A series of stress-tests are then carried out to ensure that all parameters meet the expected standards.
If further problems are detected, the equipment is sent back to the Laboratory for necessary corrections.

In the WARRANTY area, the technician performs the final visual inspection.
He or she checks the fastening of all components, cleans and vacuums any residue from the workmanship, closes the equipment, and affixes the warranty seals.

The IGBT POWER STACK, back to the logistics area where it will be packed with special ISPM-15 (International Standards for Phytosanitary Measures) certified wooden crates ready to be shipped worldwide.