What does Manitou fault code A20000 mean?

Q: What does Manitou fault code A20000 mean?

A20000 indicates: LMI (Load Moment Indicator) alarm sounds; Machine won't extend boom; Overload light flashing. Fix: Strain Gauge / Load Cell Inconsistency. LOGIC: The computer sees a voltage from the rear axle strain gauge that is "implausible" (e.g., negative weight or max capacity while empty). ACTION: 1. Check the strain gauge on the rear axle for physical damage. 2. Verify the cabling isn't pinched in the axle pivot. FIX: Recalibrate the strain gauge or replace the Load Cell sensor.

Manitou Fault Code

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A20000

LMI (Load Moment Indicator) alarm sounds; Machine won't extend boom; Overload light flashing.

System

Not specified

Symptom

LMI (Load Moment Indicator) alarm sounds; Machine won't extend boom; Overload light flashing.

Diagnosis & fix steps

Strain Gauge / Load Cell Inconsistency. LOGIC: The computer sees a voltage from the rear axle strain gauge that is "implausible" (e.g., negative weight or max capacity while empty). ACTION: 1. Check the strain gauge on the rear axle for physical damage. 2. Verify the cabling isn't pinched in the axle pivot. FIX: Recalibrate the strain gauge or replace the Load Cell sensor.

Red Seal field insights

Dirt and rocks often get packed into the rear axle pivot area, preventing the strain gauge from flexing correctly. Clean the axle area with a pressure washer before attempting to recalibrate the LMI system.

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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