Mitsubishi · PLC and HMI modules
FX3U-32MR/ES — MELSEC FX3U-32MR/ES micro PLC: fault codes, repair & supply
The FX3U-32MR/ES is a Mitsubishi MELSEC FX3U micro PLC base unit with relay outputs and AC supply. Star Automations sources and supplies the FX3U-32MR/ES and repairs failed units at component level, so you can choose between a replacement and getting your existing unit restored. This is a current OEM line. Availability and price are confirmed per enquiry. Most quotes come back the same day — send the part number or the fault code on WhatsApp.
Common MELSEC FX3U fault codes and what we usually find
Fault code wording can differ by firmware and manual revision — always confirm against the manual for your exact unit. The causes below are typical findings, not a diagnosis of your specific unit.
| Code | Meaning | Typical cause |
|---|---|---|
| ERROR flashing | Program or setting error | Parameter, syntax or circuit error; check D8064 to D8066 |
| ERROR on | CPU error | Hardware fault or watchdog error; check D8061 |
| POWER off | No power | Supply or power circuit fault |
| BATT on | Battery voltage low | Replace the battery |
| D8064 | Parameter error | Wrong or corrupted parameters |
| D8065 | Syntax error | Program syntax problem |
| D8066 | Circuit error | Ladder circuit problem |
| D8067 | Operation error | Instruction operated outside allowed range |
When a FX3U-32MR/ES needs attention
- ERROR LED flashing or lit
- PLC will not go to RUN
- Outputs not switching (relay failure)
- Battery alarm
- Communication with the programming tool fails
Replace or repair your FX3U-32MR/ES
Source a replacement
Send the part number. We check sourcing from global surplus and the OEM channel and reply the same day with availability, condition and price. Advance or verified escrow applies.
Repair your existing unit
If sourcing takes longer or you want to keep your configuration, we repair at component level — power stage, gate-drive, control and supply sections — and test before dispatch.
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FX3U-32MR/ES — common questions
Can you supply the FX3U-32MR/ES in India?
Can a faulty FX3U-32MR/ES be repaired instead of replaced?
My FX3U-32MR/ES shows ERROR flashing (program or setting error). What should I do?
Is the exact part number important?
Need the FX3U-32MR/ES now?
Send the part number or fault code — we reply the same day. Serving Chennai, Puducherry, Bengaluru, Hyderabad, Delhi and pan-India.