KFAS: Fanuc CNC Parts, Service, & Repair

         

   

Fanuc ALARM SV0434 aiSV-B AL-2

Alarm SV0434 Fanuc 0iF or 31iB and AL-2 on aiSV-B means,
the voltage has dropped in the control power supply of the servo amplifier.
Cause and troubleshooting
(a) Check the voltage of the control power supply (24 VDC).
(b) Check the communication cable between the amplifiers.

A06B-6240 CXA2A CXA2B

(c) Be sure to push the faceplate (control printed circuit board) as far as it will go.

(d) Replace the servo amplifier.

A06B6240 aiSV-B B65515EN Maintenance Manual

*CAUTION: High Voltage present.
Note: Some Machine's electrical cabinet doors are equipped with "door interlock" that will cause the breaker to trip when the door is open.  
See the machine's manual for information on how to bypass so that you can observe the alarm LED status

   

Fanuc CNC Alarm App for your smart phone

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