Fanuc alarm SP9059: COOLING FAN STOPPED IN PSM
spindle alarm (serial spindle, alpha i) · Fanuc 0i-D
What it means
The cooling fan in the power supply module stopped, detected by the fan's rotation sensor. The converter loses forced cooling and trips to protect its power semiconductors.
Likely causes
- Failed PSM fan motor or bearing
- Fan power connector loose
- Impeller jammed by debris
Replacement parts
We supply the following units for this alarm — tested, warranty-backed:
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A230-0602-B001
PSM cooling fan · Primary suspect
Need the part urgently?
Send us alarm SP9059 with your machine details — typical RFQ turnaround is 24–48h.