Spring: at the beginning of air conditioning operation in spring, first check whether the oil quality of compressor is normal, clear and transparent without blackening and deterioration; whether the oil level is normal (3 /4-1 / 3); observe whether the pipeline to the interface is normal, whether there is oil leakage; whether the contact point of the connector is normal; observe whether the air output of the fan is consistent with the normal; check whether the belt is loose; check whether the evaporation and condensation core body heat dissipation is normal. Note: before using the air conditioner, slowly rotate the compressor clutch with hands or tools to facilitate the lubrication of compressor oil and avoid compressor damage caused by starting the air conditioner.
Summer: during the peak period of air conditioning use in summer, take the week as the standard, check whether the pipeline interface and compressor are normal, and whether the harness interface is loose and fastened; clean the dust screen and suction filter screen once a month, which will help improve the cooling effect of air conditioning
Autumn: the air conditioner will enter the off-season in autumn, mainly check the compressor to ensure that the oil quantity of the compressor is large, the oil quality of the compressor is clear, and there is no blackening and deterioration. Check whether the pipe joint screw is loose; check whether there is oil leakage, etc. Clean the dust screen and suction filter screen once a month to facilitate the use of air conditioning.
Winter: winter is the off-season of air conditioning. Do not take off the compressor belt when driving in winter; check the oil volume of the compressor regularly every month. The air conditioning system shall run at least once a month, each time for about 10-30 minutes, to ensure that all interfaces of the system pipeline are fully lubricated and effectively prevent refrigerant leakage in winter.
1、发动机的启动注意事项1. Engine starting precautions
1) check the cooling liquid level and engine oil scale every time starting every day, and drain the water separator;
2) the starting time of the starter shall not exceed 30 seconds, and the continuous starting interval shall be 2 minutes;
3) after the engine is started, observe the change of oil pressure within 15 seconds;
2. Warm up and idle speed of engine
1) when the engine starts and warms up, the engine speed shall be increased gradually, and it is forbidden to run the engine with large throttle;
Note: if the engine idles for a long time, it will cause the temperature of combustion chamber to drop, resulting in poor combustion, forming carbon deposit to block the nozzle orifice, and causing the piston and air valve to stick.
3. Engine shutdown
the engine must be idle for 3-5 minutes before running and shutting down, so that the lubricating oil and coolant can take away the heat of combustion chamber, bearing and friction pair. Especially for supercharged and Intercooled engines, it is very important.
4. Correct filling method of coolant
1) do not fill the coolant too fast, otherwise, the gas in the engine cold sleeve is not easy to be discharged, which will cause the engine water temperature to be too high during operation;
2) after filling up the coolant, stop the engine for inspection once after the engine is hot, until it is filled up;
3) if the intercooler of the engine is water-cooled, the bleeder valve on the water cooler must be opened when filling the coolant.
5. Precautions for use of coolant
1) the replacement cycle of anti rust and anti freezing liquid is 2 years;
2) in winter, the concentration of anti rust and anti freezing liquid must be checked;
3) clean the cooling system before using anti rust antifreeze for old cars;
4) it is strictly prohibited to use water instead of anti rust antifreeze;
5) when the ambient temperature is lower than 0 ℃, check the concentration of anti rust antifreeze every 20000 km.