Fanuc Alarm SV0435 aiSV-B AL-5 Alarm Information by KFASLLC

KFAS: Fanuc CNC Parts, Service, & Repair

Fanuc ALARM SV0435 aiSV-B AL-5

Alarm SV0435 Fanuc 0iF or 31iB and AL-5 on aiSV-B means,
the voltage has dropped in the DC link of the servo amplifier.
Cause and troubleshooting
(a) Check that the connection cable (bar) for DC link is tightened with the screw.

(b) If a DC link low voltage alarm condition occurs in more than one module, see "AL-4" for explanations about how to troubleshoot the Power Supply Module.
(c) If a DC link low voltage alarm condition occurs in only one servo amplifier, be sure to push the
control printed circuit board of that servo amplifier in as far as it will go.
(d) Replace the servo amplifier corresponding to the alarm.

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