What does Mantis fault code Error 01 mean?

Q: What does Mantis fault code Error 01 mean?

Error 01 indicates: All crane functions (hoist, telescope, boom down) are cut off; Audible alarm. Fix: Boom Angle Sensor Signal Out of Range. LOGIC: The LMI is receiving a voltage from the angle sensor (potentiometer) that is higher or lower than its calibrated "Home" or "Max" positions. ACTION: 1. Inspect the angle sensor box on the side of the boom. 2. Check for loose mounting bolts that let the sensor rotate. FIX: Re-align the sensor or replace the internal potentiometer.

Mantis Fault Code

Free · no signup

Error 01

All crane functions (hoist, telescope, boom down) are cut off; Audible alarm.

System

Rayco Wylie LMI

Symptom

All crane functions (hoist, telescope, boom down) are cut off; Audible alarm.

Diagnosis & fix steps

Boom Angle Sensor Signal Out of Range. LOGIC: The LMI is receiving a voltage from the angle sensor (potentiometer) that is higher or lower than its calibrated "Home" or "Max" positions. ACTION: 1. Inspect the angle sensor box on the side of the boom. 2. Check for loose mounting bolts that let the sensor rotate. FIX: Re-align the sensor or replace the internal potentiometer.

Red Seal field insights

Mantis cranes vibrate heavily because of the crawler tracks. This vibration often vibrates the set-screws loose inside the angle sensor. If your angle reads "0" while the boom is clearly up, the internal gear has likely slipped.

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.

Track this across your whole fleet

This code is free to read. AM Fleet Integrity lets your team log fault codes against assets, plus the full fault-code library, QR operator reporting, PM scheduling and predictive alerts. Start free — no credit card required.

Start your free trial

Related Mantis fault codes

← All Mantis fault codes