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Bobcat 863 U121A Error Code

U121A Fault Code Meaning :

CAN Communications Fault

U121A Error Code

CAN Communications Fault is the main cause of U121A error.To solve U121A locate and open the low-pressure valve, then attach the refrigerant to the valve and charge from there. Ensure you use the right refrigerant type and amount, as specified by a manufacturer. It is possible to overcharge the AC, so consider seeking help from a mechanic.

Bobcat 863 Photo

Tip For 863 Model

The overload warning device (if equipped) senses hydraulic pressure in the boom lift circuit. When the hydraulic pressure in the boom lift circuit reaches a predetermined pressure setting, a buzzer will sound that indicates an overload condition.

If the buzzer sounds, immediately move the arm closer to the excavator and lower the boom. Reduce the size of the load before attempting to re-lift the load.

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