Beijing Gree Air Conditioner Repair Phone. After 20 minutes of cooling operation of the Gree air conditioner, it shuts down due to protection. Article Source: Beijing Gree Air Conditioner Repair Center http://blog.163.com/geliktiao_2012/.
Analysis and Maintenance: Preliminary judgment indicates either a protective device activation or a malfunction in the outdoor unit circuit board. After trying to replace the outdoor unit circuit board, the fault persists. Upon dismantling the outdoor unit casing and checking when the fault occurs, both the high-pressure pressure switch 63H1 and the internal thermistor 49C of the compressor have activated for protection. However, the fan can still operate normally. Checking the high-pressure side reveals that the pressure is too high. The main causes analyzed are:
1. Improper installation location of the outdoor unit or obstacles within close proximity.
2. The heat exchanger of the outdoor unit is too dirty, preventing effective heat exchange.
Firstly, check if the outdoor unit is installed correctly with no obstacles nearby. Then, inspect the outdoor unit's heat exchanger, which was found to be full of dust, preventing effective heat exchange.
Fault Phenomenon: After 20 minutes of cooling operation, the machine automatically shuts down and enters a protective state. After 10 minutes, the entire unit restarts, and the fault reoccurs.
Repair Method: Clear the dust from the heat exchanger, and the fault is resolved.