Question 1

What does Other fault code A01 / A02 mean?

Accepted Answer

A01 / A02 (Sany LMI): Hoisting disabled; Telescope disabled. Fix: Anti-Two Block (ATB) Fault.

LOGIC: A01 is the "Two-Block" warning (hook hit the tip). A02 is a "Cable Break" (circuit open).

Question 2

What does Other fault code CA559 mean?

Accepted Answer

CA559 (Komatsu (VHMS)): Engine bogs under load; Hard starting; Low fuel pressure warning. Fix: Common Rail Fuel Pressure Low.

LOGIC: The actual pressure in the fuel rail is lower than the "Commanded" pressure from the ECM.

ACTION: 1. Replace fuel filters (Primary & Secondary). 
2. Perform a "Cylinder Leakage Test" via the monitor.

FIX: Replace a leaking Fuel Injector (internal bypass) or the High-Pressure Fuel Pump (Supply Pump).

Question 3

What does Other fault code CID 0091 FMI 08 mean?

Accepted Answer

CID 0091 FMI 08 (Caterpillar (ECM)): Engine stuck at idle; No throttle response; "Limp Home" mode. Fix: Throttle Position Sensor - Abnormal Signal.

LOGIC: The ECM is receiving a PWM (Pulse Width Modulated) signal that is "noisy" or has an incorrect frequency.

ACTION: 1. Check the harness at the base of the accelerator pedal. 
2. Verify 5V/8V supply to the sensor.

FIX: Replace the Throttle Position Sensor or repair the "rub" in the cab-to-engine harness.

Question 4

What does Other fault code CID 0673 FMI 02 mean?

Accepted Answer

CID 0673 FMI 02 (Caterpillar (Transmission)): Transmission shifts "hard"; Hunt for gears; Noisy operation. Fix: Transmission Output Speed Sensor - Data Erratic.

LOGIC: The ECM sees the engine RPM increasing but the output speed "jumping" or dropping to zero instantly.

ACTION: 1. Remove the sensor from the tail-shaft. 
2. Clean metal "fuzz" (debris) off the magnetic tip.

FIX: Clean sensor tip or replace the Output Speed Sensor.

Question 5

What does Other fault code D110KB mean?

Accepted Answer

D110KB (Komatsu (Monitor)): Battery not charging; Lights dim; Low voltage alarms. Fix: Alternator R-Terminal Abnormal.

LOGIC: The controller is not seeing the "Charge" signal from the alternator while the engine is running.

ACTION: 1. Check the "R" terminal wire (usually a small wire) for a break. 
2. Check the fan belt tension.

FIX: Repair the R-terminal wire pigtail or replace the Alternator.

Question 6

What does Other fault code E02 / E03 mean?

Accepted Answer

E02 / E03 (Sany LMI): Alarm buzzer; Winch-up and Telescope-out cut off. Fix: Boom Angle Sensor Fault.

LOGIC: E02 (Signal too high) or E03 (Signal too low). The LMI is not seeing the 4-20mA signal from the inclinometer.

Question 7

What does Other fault code E12 / E13 mean?

Accepted Answer

E12 / E13 (Sany LMI): Load reading is erratic or "flashing" 0.0t. Fix: Pressure Transducer Fault.

LOGIC: E12 (Rod side) or E13 (Piston side). The LMI cannot calculate the "Moment" because it lost one of the two pressure inputs.

Question 8

What does Other fault code E31 mean?

Accepted Answer

E31 (Sany LMI): Complete system lockout; Display may show "CAN Error." Fix: Communication Failure.

LOGIC: Loss of data between the display in the cab and the main SYMC (Sany Motion Controller).

Question 9

What does Other fault code Error 02 mean?

Accepted Answer

Error 02 (Robway RCI): Screen is blank or "flashing"; All crane motions disabled (Motion Cut). Fix: Communications Fault.

LOGIC: The display console in the cab is not receiving data from the main processing unit (the "brain").

ACTION: 1. Check the data cable between the console and the CPU box. 
2. Verify the CPU box has green "heartbeat" LEDs lit.

Question 10

What does Other fault code Error 101 / 301 mean?

Accepted Answer

Error 101 / 301 (Robway RCI): Load stays at a fixed value regardless of weight lifted. Fix: Load Cell / Transducer Offset Error.

LOGIC: The "Zero" point of the sensor has drifted too far from the calibrated value, often due to sensor damage or extreme cold.

ACTION: 1. Check for physical damage to the load cell (links or pins). 
2. Perform a "Zero Calibration" with no load on the hook.

Other Fault Codes

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Other manufacturers

Code	System	Symptom	Full fix
A01 / A02	Sany LMI	Hoisting disabled; Telescope disabled.	View fix
CA559	Komatsu (VHMS)	Engine bogs under load; Hard starting; Low fuel pressure warning.	View fix
CID 0091 FMI 08	Caterpillar (ECM)	Engine stuck at idle; No throttle response; "Limp Home" mode.	View fix
CID 0673 FMI 02	Caterpillar (Transmission)	Transmission shifts "hard"; Hunt for gears; Noisy operation.	View fix
D110KB	Komatsu (Monitor)	Battery not charging; Lights dim; Low voltage alarms.	View fix
E02 / E03	Sany LMI	Alarm buzzer; Winch-up and Telescope-out cut off.	View fix
E12 / E13	Sany LMI	Load reading is erratic or "flashing" 0.0t.	View fix
E31	Sany LMI	Complete system lockout; Display may show "CAN Error."	View fix
Error 02	Robway RCI	Screen is blank or "flashing"; All crane motions disabled (Motion Cut).	View fix
Error 101 / 301	Robway RCI	Load stays at a fixed value regardless of weight lifted.	View fix
Error 31 / 32	Robway RCI	Load reading shows "0" or "Err"; Audible alarm sounds.	View fix
Error 54	Robway RCI	Winch-up and Telescope-out functions cut off.	View fix
MID 128 PID 94	Volvo (V-ECU)	Engine cuts out; Low power; Gauge "dancing."	View fix