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Repair of Mitsubishi Drive Electronics

Mitsubishi Drive Electronics

We test and repair Mitsubishi AC power supplies as well as spindle and servo modules.
Additionally, we offer service for Mitsubishi motors.

We specialize in the following series:

  • MDS-A
  • MDS-B
  • MDS-C / CH
  • MDS-D / DH / D2

Our repair process is preventive-oriented and includes a series of steps that contribute to ensuring high repair quality.

Fault analysis and localization

What can you do?

Faults in power supplies, servo, and spindle modules.

Possible solutions and hints

  • Try replacing the motor as a test.
  • Check cable connections.
  • Operate in jog mode without load.

If these measures do not help, the fault usually lies in the power stage of the drive module.

For additional error messages, refer to the alarm list available for download at the end of this page.

Possible solutions and hints

  • Warm the device with an external source. If it then turns on, this indicates a weak power supply that needs repair.
  • Check fuses.
  • Verify the voltage supply of 3 x 200 or 220 volts depending on the model.

For additional error messages, refer to the alarm list available for download at the end of this page.

Possible solutions and hints

For the power supply, this could mean that the connected consumers (servo or spindle drives) are causing an overload.
Solution: Gradually remove or replace consumers to locate a faulty device.

In the case of servo and spindle modules, a faulty motor can trigger an overload.
Solution: Check the motor and connection cables.

However, in both cases, the device itself can be the cause of the error, as its power output stage may be defective.

For additional error messages, refer to the alarm list available for download at the end of this page.

Handling parameters

When parameterizing, it is crucial to save the settings early and also document jumper and key settings.
Parameter is set on the device

What should be considered when parameterizing?

  • The parameters are not stored in the devices but in the machine. The user must perform this process independently at the machine.
  • Pay attention to jumper and key settings and it's best to take photos of them.
  • Obtain the appropriate documentation or software for setting the parameters.
    You will find further documentation on this topic at the end of this page or ask us.

MDS-A-CR-90 Power Supply Unit

2550.00 €


MDS-A-CR-75 Power Supply Unit

2185.00 €


MDS-B-CVE-55 Power Supply Unit

1990.00 €


MDS-C1-SP-110-N Servo Drive Unit

2000.00 €


MDS-C1-V2-2003 2 Axis Unit

2275.00 €


The typical process for repairing Mitsubishi drive modules

The repair process for drive modules includes the following steps:

  • Preventive overhaul - replacement of all necessary defective and worn parts.
  • Intensive cleaning.
  • Comprehensive final and stress tests on our test benches.
  • Parameter matching or restoration of parameters.
  • Completion of documentation and checklists.
VIDEO: Repair and test process of Mitusbishi AC Servo/Spindle Drives MDS-A/B/C/D/DH

High-quality spare parts for high-quality repairs

For Mitsubishi drive modules, we replace

  • Electrolytic capacitors
  • Large buffer capacitors
  • Relays
  • Current measuring modules
  • Optocouplers

Additionally, we replace certain parts that have been frequently failing over multiple repairs and have been statistically selected for replacement.

To counteract bottlenecks and discontinuations, we have process-oriented software solutions that monitor our inventory. We order some parts in advance, and for series repairs, we even secure ourselves with sufficient spare parts for a year to ensure access to a large stock at any time.

Quality and Level of Repair

A professional repair requires the use of a test bench. Specially tailored and complex testing equipment is developed for each new series. The devices are thoroughly checked for functionality by undergoing a long-term stress test.

The test is conducted on a test bench that allows a 100% simulation of processes as in a real machining machine with Mitsubishi control.

During the test, the following are checked:

  • BUS control
  • Encoder connection
  • Alarm states
  • Speed
  • Current and voltage consumption
  • Temperature
  • Parameters
VIDEO: Repair and test process of Mitusbishi AC Servo/Spindle Drives MDS-A/B/C/D/DH

We continuously expand our repair portfolio with new series

Since drive and power electronics are often prematurely discontinued, you may be under pressure to deliver replacements to your customers on time. We assist you in analyzing bottlenecks and work together on optimal solutions.

The typical process includes:

  • Development of test stands and procedures
  • Organization of spare parts
  • Preventive repair at the component level
  • If needed, development of new or re-engineering of modules or complete devices

Frequently Asked Questions (FAQ)

Drive module repair

Complex and specially adapted test equipment is developed for each new series. Devices are tested with long-term load test thoroughly checked for functionality. Get an idea of our test facilities.
In times of shortages and discontinuations, we have process-oriented software solutions that monitor our inventories. We order some parts in advance, for series repairs even for 1 year, so that we can fall back on a large stock of spare parts. Certain modules are re-engineered by us.
If possible, a copy of the parameters is always read out and stored upon receipt. After successful repair, the data is compared and in case of exchange or sale, original parameters are transferred or restored to the new device. We have all the necessary hardware as well as software applications to parameterize Yaskawa devices according to the specifications.
The repair process for drive modules includes, but is not limited to, the following:
  • Preventive overhaul - replacement of all necessary defective and used parts. E.g. electrolytic capacitors, transistors, optoelectronic components.
  • Intensive cleaning
  • Extensive final and load tests on our test stands
  • Parameter adjustment or parameter recovery
You can find more information on the process flow for drive module repair here.

Further information

  • Servomodule MDS-B-V2-3535, MDS-B-V2-0505, MDS-C1-V2-4545, MDS-B-V1-45, MDS-C1-V2-4520, MDS-B-V2-1010, MDS-B-V2-3510
  • Spindelmodule MDS-B-SPH-55 , MDS-B-SPM-110, MDS-B-SP-150, MDS-B-CV-185, MDS-A-SP-185, MDS-B-SP-150, MDS-C1-SP-185
  • Netzteilmodule MDS-B-CV-110, MDS-B-CVE-185, MDS-A-CV-300, MDS-B-CV-300, MDS-B-CVE-260, MDS-C1-CV-300
We document the repair process for every order. You can download a detailed description of the process here.
We are continuously looking for new areas of activity. After consultation with the customer, we determine the necessary steps for a safe and qualitative repair
It may happen that error messages continue to be displayed with the connected device. Already during the analysis of the errors, we give the customers suggestions for solutions for different malfunctions and errors. error cases, if we suspect further error causes. Errors and faults are documented, among other things, in the log file of the respective device, which may indicate, for example, encoder communication problems, cable defects or overloads.
Many of our customers have defective devices of the same model in larger quantities. We have optimized our processes for series repair and have the capacity to repair many devices in parallel quickly and to a high repair many devices in parallel.

Cost & Warranty

The repair process itself represents a high degree of technical complexity, which we always want to master with a qualitative and long-term solution for you. solution for you. However, the maintenance of these quality characteristics requires, to agree on a repair flat rate or standard repair price. We communicate honestly and transparently all the information you need. For example, prices, previous and completed work steps, delivery times, etc.
Basically we give 12 months warranty.

You can contact us in the following way:

Chat with our customer support, write us a message: [email protected] or call us: +49 6251 9888430