SP9012Spindle alarm · Spindle amplifier (SPM)Usually repairable
Fanuc αi SP9012: DC Link Overcurrent/IPM Alarm
Also shown as: SPM display 12; 16i/18i/21i/0i: 9012 or 7n12
What SP9012 means
The spindle amplifier (SPM) detected overcurrent in its DC link or power module (IPM). Shown on the SPM as 12.
Symptoms
Alarm when the spindle starts or accelerates; can return immediately after reset.
Is it repairable?
Yes: power module repair is common on Fanuc spindle amplifiers.
Common causes
- Spindle motor winding short or ground fault
- Failed IPM or IGBT
- Damaged power cable
- Wrong spindle parameters
Safe checks
- 1Megger the spindle motor and cable to ground
- 2Compare winding resistances
Drives hold dangerous voltage after power-off. Checks should only be done by qualified personnel, with power isolated and the DC link discharged.
Reviewed by AutomIQ repair technicians. Code and name from the FANUC αi series Maintenance Manual.
Related Fanuc αi faults
- SV0368Serial data error (built-in)
- SV0401V ready off
- SV0433DC link undervoltage
- SV0436Soft thermal (OVC)
- SV0438motor current alarm
- SV0442DC link precharge failure