Hope the workers will pay attention to tq for sure

Haier Inverter 1-Drag-2 Air Conditioner: Single machine does not cool when turned on, but dual machines work normally.

Model: KFR-25GW*2/BPF

Fault Phenomenon: The single machine does not cool when turned on, but the dual machines work normally.

Maintenance Process: The machine showed no cooling, and after the service center replaced the outer panel, the machine ran. However, there was a phenomenon of the single machine not cooling. Upon inspection, the connection lines between the indoor and outdoor units were normal, as was the motherboard, with no differences found. Later, upon asking the repairman, it was reflected that the compressor had been replaced before. A thorough check revealed that the two electronic expansion valve coils were incorrectly connected, causing this fault.

Maintenance Measures: After swapping the coils of Machine A and Machine B, the unit worked normally.

Summary: When the worker replaced the compressor, they removed the coil and made an error during installation, which made the fault very difficult to diagnose. It is hoped that workers will be sure to pay attention to this in the future.

Article Source: http://blog.sina.com.cn/haierkongt