When using excavators in high temperature environment in summer, air conditioning must be used in the cab. Some excavator air conditioners have two modes: warm air and cold air. Pay attention to some details when replacing these two modes, otherwise it is easy to cause damage to the air conditioning system. This article will summarize some matters needing attention when switching between warm air and cold air. Since different brands of excavators are different, this article is for reference only.
1. Close the two warm air and water valves on the heating pipe. Otherwise, when the cold air is turned on, the air conditioner will blow hot air. It will also damage the air conditioning system in the long run. In addition, remind that both air and water heating valves must be closed.
2. Clean the condenser fins. When the condenser is blocked by impurities and the heat dissipation is poor, the refrigeration effect of the air conditioner is not good. In winter, due to the long-term use of air conditioning for refrigeration, more dust must accumulate on the condenser. Therefore, careful cleaning is necessary.
3. Check the tension of the air conditioning belt and whether the belt is cracked and aging, and replace it if necessary.
4. Clean the cab. When cold air conditioning is not used, many operators open the cab doors and windows for construction. This must cause more dust to accumulate in the cab. After starting to use cold air conditioning, doors and windows are closed tightly, and harmful substances such as flying dust circulate indoors, which will reduce comfort and be harmful to health. Therefore, it is necessary to clean the cab and the filter screen of the air conditioner blower.
5. After performing the above items, check whether the air conditioning refrigeration system operates normally. Start the excavator, turn on the blower, turn on the refrigeration switch of the air conditioner, and check whether there is cold air blowing out. After confirmation, turn off the air conditioner first and then turn off the engine to prevent damage to electrical equipment.
