Description:

The error code ETC 000871.13 is triggered when the control unit measures refrigerant pressure below 1.7 bar (24.6 psi) at the refrigerant pressure sensor (B130, lead 2019). This indicates an issue with the refrigerant system, such as a leak, insufficient refrigerant charge, or a malfunctioning sensor.

Reaction:

When this fault is detected, the control unit may disable the air conditioning system or reduce its efficiency to prevent damage due to low refrigerant pressure. This action helps protect the compressor and other components from operating under low-pressure conditions.

Recommendations:

Inspect Refrigerant System:

• Check for Leaks: Use leak detection tools to inspect the refrigerant system for any signs of leaks. Pay attention to hoses, connections, and the compressor.
• Measure Refrigerant Level: Check the refrigerant level using proper gauges and ensure it meets the manufacturer’s specifications. Recharge the system if necessary.

Sensor and Circuit Testing:

• Test the Sensor: Verify the operation of the B130 refrigerant pressure sensor using diagnostic tools. Replace the sensor if it is found to be faulty or providing inaccurate readings.
• Inspect the Circuit: Ensure that the wiring and connections to the B130 sensor are intact and secure. Repair any damaged wiring as needed.

Repair or Replace Components:

• Fix Leaks: Repair any detected leaks in the refrigerant system. This may involve replacing seals, hoses, or other components.
• Recharge Refrigerant: After repairing any leaks, recharge the system with the appropriate amount of refrigerant to ensure proper operation.
• Replace Faulty Components: Replace the B130 sensor or any other components if they are contributing to the low-pressure readings.

Note:

Maintaining proper refrigerant pressure is essential for the efficient operation of the air conditioning system. Regular inspection and maintenance can help identify and address issues before they lead to system faults. Using high-quality refrigerant and ensuring proper charging procedures can also enhance system reliability and performance.