1. When the air inlet is empty, check the pressure reducing valve assembly, clean and remove stuck parts or replace faulty parts. In the process of exhaust unloading, check whether the unloading valve is blocked or stuck, and clean, repair or replace the faulty parts.
2, check the brake system components and pipelines. Replace faulty parts.
3. Poor lubrication, too small clearance or cylinder pulling between piston and cylinder liner will lead to overheating. In this case, the faulty parts should be inspected, repaired or replaced.
The compressor was overheated, which led to the shutdown (protector action) shortly after starting.
1. If the refrigerant is insufficient or excessive, please fill the leak and vacuum, add enough refrigerant or release excessive refrigerant.
2. The capillary, filter and expansion valve are blocked.
3. The four-way valve leaks internally.
4. If the compressor itself fails, such as short circuit, open circuit and grounding, replace the compressor after inspection.
5. If the protection relay itself fails, please use a multimeter to check whether its contacts are on when the compressor is not overheated. If not, please replace it with a new protector. When replacing compressors 5528 and 5532, it is necessary to check the starting capacitor and starting relay (if one of them is damaged, both must be replaced at the same time).
6, high pressure, pressure relay action, please analyze the reason, according to the situation to be ruled out.
7. If the condenser is poorly ventilated or short-circuited, please remove obstacles on the outdoor side and clean the condenser.