SV0444Servo alarm · Servo amplifier (SVM)Usually repairable
Fanuc αi SV0444: Inverter Internal Cooling Fan Stopped
Also shown as: SVM display 1; 16i/18i/21i/0i: 444
What SV0444 means
The internal cooling fan in the servo amplifier (SVM) stopped. Shown on the SVM as 1.
Symptoms
Alarm at power-on or after running; the fan is silent or slow.
Is it repairable?
Yes: fan replacement is a quick repair.
Common causes
- Failed fan
- Fan clogged with oil mist or dust
- Fan connector fault
Safe checks
- 1Check whether the fan spins and is clean
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