Zoomlion Fault Code

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0x0312 / E0312

Boom Telescoping / Hoist Locked Out

System

Safety / Crane Logic

Symptom

Boom Telescoping / Hoist Locked Out

Diagnosis & fix steps

LOGIC: Load Moment Indicator (LMI) Main Boom Angle Sensor CAN Node Lost. ACTION: Check 24V power supply and ground pins at the boom base junction box. Inspect CAN High and Low twisted-pair wiring for physical damage or loose pin crimps at the cable reel.

Red Seal field insights

Safety Override: Loss of angle sensor telemetry prevents the Hirschmann/PAT LMI controller from calculating crane tipping capacity, locking out high-risk hydraulic functions.

Same code keeps coming back?

That's a program problem, not a part problem. Book a 30-minute uptime review with Grant, a Red Seal Heavy Duty Technician.

Book an uptime review

Read before you touch anything

  • This is general reference information, not a repair manual. It is for trained, qualified technicians.
  • Fault codes, meanings and procedures vary by model, serial number and software version. Confirm the code and the procedure against the manufacturer's service manual before acting.
  • Follow the OEM service manual, torque specs and your site's safety procedures: lockout/tagout, block raised equipment, relieve hydraulic, fuel and air pressure, and let hot systems cool.
  • You use this information at your own risk. Adventure Mechanical and AM Fleet Integrity accept no liability for damage, injury, downtime or loss arising from its use.
  • Not affiliated with or endorsed by any manufacturer. Brand names are used only to identify the equipment a code applies to.

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