Fault symptoms: After powering on, a loud noise is emitted from the machine. About 10 minutes later, a "tick" sound is heard and the machine stops. After 1 minute, the compressor restarts automatically. This process repeats itself. Article source: Beijing Haier Air Conditioning Repair Center http://blog.163.com/haierktiao_2012.
Analysis and Maintenance: This fault is clearly caused by the activation of the overload protector. The main reasons for this are as follows: (1) Low power supply voltage. (2) Poor performance of the compressor. (3) Blocked pipe. Using a multimeter to measure the power supply voltage shows it to be 180V, which is too low, causing an increase in the operating current of the compressor and raising the temperature, leading to overload protection being triggered in Haier split-type air conditioners due to the activation of the overload protector.
Repair method: Purchase an AC voltage regulator with a power rating greater than the rated power of the air conditioner. By increasing the voltage, the fault is eliminated.