Fanuc alarm 08
αi PSMR · Fanuc αi PSM
What it means
Excessive short-term regenerative power detected.
Likely causes
- Insufficient regenerative resistance for duty cycle
- Regenerative discharge circuit failure inside PSMR
- External regen resistor open or mis-wired
Triage note: B-65285EN: regenerative circuit abnormal - replace the PSMR. Check resistor value within +/-20% first.
Replacement parts
We supply the following units for this alarm — tested, warranty-backed:
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A06B-6077-H111
Power Supply Module α PSMR (resistive-regen type) · Common cause
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External regenerative resistor unit per machine spec
Regenerative Resistor Unit · Primary suspect
Need the part urgently?
Send us alarm 08 with your machine details — typical RFQ turnaround is 24–48h.