Analysis and Repair: The low-pressure pressure of the system was measured at 0.65 MPa, which is significantly higher. After releasing Freon to 0.55 MPa, there was very little cold air coming from the indoor unit's outlet. The working current was measured at 7.3A, which is normal. Touching the high and low-pressure pipes, it was found that the low-pressure pipe was relatively cold while the high-pressure pipe felt slightly cold, indicating that the compressor is basically fault-free. By touching the four copper pipes of the four-way valve, the one connected to the compressor exhaust pipe had a higher temperature, while the other three all felt warm. The operating mode of the air conditioner was switched to heating mode. A not-so-loud sound of the four-way valve switching gas was heard, and the heating effect was also not very good, leading to the conclusion that the four-way valve of the air conditioner has a gas leakage fault. The four-way valve was replaced, checked for leaks, vacuumed, and refilled with Freon, eliminating the fault. Beijing Chunlan Air Conditioner Repair.
Tip: Generally, when the four-way valve leaks gas, the temperature difference between the intake and exhaust ports is small, there is a significant airflow sound inside the valve body, the suction force on the compressor return gas pipe is large, and the liquid storage tank temperature is relatively high.
Technical editor of Beijing Chunlan Air Conditioner Repair Center.
Chunlan 2P cabinet-type air conditioner, poor cooling effect.