Fault Phenomenon: Tadano GT-550E when empty or lightly loaded, the moment limiter frequently alarms and cuts off dangerous direction movements.

Troubleshooting Process:
– Checked angle sensor: mounting position loose.
– Checked length sensor cable: tension normal.
– Recalibrated angle sensor zero point.

Root Cause: The boom angle sensor zero-point drifted or mounting was loose, causing data errors.

Required Parts: None (requires calibration).