Unidrive M400 repair and refurbishment.
Component-level repair and refurbishment for the Unidrive M400. Bench diagnostics, engineer-led, tested before return.
Unidrive M400 repair and refurbishment
The Unidrive M400 adds EtherNet/IP and advanced closed-loop capability to the M-series platform. Its more complex control architecture — including safety and fieldbus options — means a systematic diagnostic approach is essential when faults occur.
Common Unidrive M400 faults we fix
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Control board faults causing communication losses on EtherNet/IP or other fieldbus option modules
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Power module failure in the inverter stage — the same mechanism as other M-series drives but more costly to leave undiagnosed
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Fieldbus option card failure causing network isolation faults in integrated automation systems
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Control circuit faults triggering safety trip codes without an obvious hardware cause
How it works
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1
Send details
Share the drive model, fault symptoms, and any photos or error codes.
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2
Diagnostics
Bench diagnostics isolate the fault and scope the repair.
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3
Repair, Refurbish & Test
Component-level repair and thorough refurbishment with outcomes tested before return.
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4
Return to service
Confirmed results and return logistics for your drive.
Why Electron Lab
- Engineer-led bench diagnostics
- Component-level repair and rework
- Tested Before Return
- Clear, fast quoting
Unidrive M400 repair FAQs
Do you repair Unidrive M400 drives with EtherNet/IP option card faults?
Yes. We test both the base drive and option modules. If the EtherNet/IP card has failed, we source a compatible replacement and verify network communication before return.
Can you repair a Unidrive M400 that trips only under load?
Intermittent faults under load are often power stage related. We carry out controlled load testing during the repair to replicate and confirm the fault before sign-off.