KFAS: Fanuc CNC Parts, Service, & Repair
Fanuc ALARM 433 PSM AL-04 SPM AL-51
Alarm 433 Fanuc control and
AL-04 PSM and AL-51 on SPM means,
the DC voltage (DC link) drop has been detected in the main circuit of the PS.
Cause and troubleshooting
(a) A small power dip has occurred.
→ Check the 3 phase AC input power supply.
(b) Drop in input power
→ Check the power supply specification.
(c) The main circuit was disconnected with emergency stop canceled
→ Check the sequence, cable or magnetic contactor.
- Replace the Power Supply Module.
This alarm is applicable for the following units
*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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