Description:

The error code, ATC 000871.13, is activated when the refrigerant pressure measured by the control unit falls below 1.7 bar (24.6 psi) at the refrigerant pressure sensor (B130, lead 2019). This low pressure indicates a potential issue with the refrigerant levels or system integrity, such as leaks or a failure in the refrigerant cycle components, which can compromise the efficiency and effectiveness of the HVAC (Heating, Ventilation, and Air Conditioning) system.

Reaction:

Due to the low refrigerant pressure, the HVAC system may not be able to adequately cool or heat the cabin, affecting operator comfort and potentially leading to overheating of other components.

Recommendations:

• Check for Refrigerant Leaks: Inspect the HVAC system for any signs of leaks, which could be causing the low pressure. Use leak detection methods such as UV dye or electronic leak detectors to identify problematic areas.
• Recharge Refrigerant: If the refrigerant level is low, recharge the system to the manufacturer’s specified pressure. Ensure that the correct type and amount of refrigerant is used.
• Inspect HVAC Components: Examine components such as the compressor, condenser, and associated hoses and valves for any damage or wear that might contribute to refrigerant loss or low pressure.
• System Testing and Monitoring: After any repairs or adjustments, test the HVAC system to ensure it maintains proper pressure and functions effectively. Monitor the system over time to confirm that the issue does not recur.
• Reset Fault Codes and Validate System Performance: Clear any stored fault codes and validate the performance of the system to ensure that it is operating within the specified range and effectively regulating cabin temperatures.

Note:

Maintaining proper refrigerant pressure is vital for the performance and longevity of HVAC systems in heavy machinery. Regular checks and preventive maintenance can help ensure the system operates efficiently, providing a comfortable working environment and preventing more serious mechanical issues.