Fanuc alarm 33
αi SPM · Fanuc αi SPM
What it means
DC link precharge failure (main capacitor not recharged in time) - reported on SPM, source is converter.
Likely causes
- PSM alarm 05 condition mirrored: recharge resistor/distributing board defect
- Too many modules per PSM
- DC link short or wiring error
Triage note: Combo alarm rule: SPM 33 with PSM 5 = power supply module problem. CNC: SP0033 / 9033.
Replacement parts
We supply the following units for this alarm — tested, warranty-backed:
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PSM distributing/precharge board
Amplifier Control Board · Common cause
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A06B-6087-H115
Power Supply Module αi PSM · Common cause
Need the part urgently?
Send us alarm 33 with your machine details — typical RFQ turnaround is 24–48h.