Applicable Systems
Series 0i
Series 16/18/21
Alpha
Beta
Symptoms
Alarm 4078: LASER TUBE PRES.. This FANUC Series 16/18/21 (including 16i/18i/21i and 160i/180i/210i) CNC system alarm is displayed on the operator panel when the condition occurs.
Possible Causes
- Refer to the FANUC operator manual for this alarm group
- Check machine axis, program and system state at the time of the alarm
Troubleshooting Steps
- Step 1: Read the alarm number and full message on the CNC display
Alarm noted - Step 2: Identify the operating mode and program state when the alarm appeared
Triggering operation identified - Step 3: Consult the FANUC manual for the alarm group (4000-series special alarms)
Root cause located - Step 4: Apply the corrective action and clear the alarm
Alarm cleared
How to Reset
Reset: correct the root cause, press CANCEL/RESET on the MDI panel. If it persists, cycle power off/on. Note: 4000-series alarms are specific to FANUC 16i/18i/21i class controls.
Frequently Asked Questions
- Q: What does alarm 4078 on a FANUC 16/18/21 control mean?
Alarm 4078 corresponds to: LASER TUBE PRES.. It belongs to the FANUC 16/18/21 series (16i/18i/21i compatible) alarm set; consult the machine builder manual for the exact trigger.
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Source: CNC Alarms.com - https://cncalarms.com/fanuc-16-18-21
Category: CNC
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