Fanuc Alarm SV0654 AL-7 Alarm Information by KFASLLC

KFAS: Fanuc CNC Parts, Service, & Repair

Fanuc ALARM SV0654 aiSV-B AL-7

Alarm SV0654 Fanuc 0iF or 31iB and AL-7 on aiSV-B means,
the DB relay inside the servo amplifier is abnormal.
Cause and troubleshooting
(a) Check if the power lead is short-circuited.
(b) Replace the servo amplifier or dynamic brake module.
(c) When using a dynamic brake module, replace the connection cable between it and 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