: Open the control cabinet while powered to see the LED code on the Z-axis servo amplifier (look for 8, 9, or A). Verify Diagnostic Screens Fanuc 16/18/21 Series Diagnostic 200, 201, and 204 Fanuc 0 Series Diagnostic 720–727 Isolate the Component The "Repack" Drive

The 414 alarm is a "system-level" notification. To find the root cause, you must look deeper into the machine's diagnostics: CNC Diagnostics: Diagnostic No. 200 or 204

The on the Z-axis is a high-current detection error, typically indicating a fault in the digital servo system, motor, or cabling. Understanding the 414 Alarm

In a scenario, the Z-axis (vertical) is under immense load, causing potential intermittent errors due to physical or electrical strain. Common Causes of Z-Axis Detect Error (Repack Application)

in the motor connectors, a frequent cause of shorts that trigger 414 alarms on vertical axes like the Z. Key Potential Causes HELP!! Servo Alarm No. 414: X-axis detect error 13 Apr 2014 —

If the battery cable is disconnected, the batteries are dead, or the encoder cable is unplugged while the batteries are not connected, the encoder loses its reference point. The Result: The control sees an "APC Alarm" (Absolute Pulse Coder) combined with a 414 Detect Error because the encoder is effectively "brain dead" and cannot report its position.

Here’s a breakdown of the for the Z axis, specifically the “detect error” condition, and guidance on repacking (replacing/repairing the Z-axis motor or cables).

The amplifier itself can fail. If the feedback input circuit on the amplifier is fried, it cannot read the encoder.

However, respect the physics. The Z-axis is heavy. If the repack doesn't work, stop guessing. Test the cable continuity, swap the amplifier, and prepare to replace the pulse coder or the motor brake.

Inspect the power leads (U, V, W) and the encoder cable for coolant damage or frayed insulation.

: High current / abnormal current on the L-Axis (Typically the X-axis).