Fanuc alarm 58
αi SPM · Fanuc αi SPM
What it means
Converter main circuit overload (PSM heat sink overtemperature mirrored onto SPM).
Likely causes
- PSM alarm 03 condition mirrored: PSM main-circuit fan failed / dust / overload
- PSM control PCB connector unseated
Triage note: Combo rule: SPM 58 = look at the PSM. CNC: SP0058 / 9058.
Replacement parts
We supply the following units for this alarm — tested, warranty-backed:
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PSM fan kit
Cooling Fan Assembly · Primary suspect
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A06B-6087-H130
Power Supply Module αi PSM (if overheating persists) · Common cause
Need the part urgently?
Send us alarm 58 with your machine details — typical RFQ turnaround is 24–48h.