Engine Bus Air Conditioning Maintenance Note

31-Oct-2025 0Comments

Engine Bus Air Conditioning Maintenance Note

Engine Bus Air Conditioning Maintenance

The working environment of automotive air conditioning systems is extremely harsh. Long-term vibration and corrosion can cause system leaks and decreased reliability. The compressor is a high-speed operating device in the air conditioning system. Wear and tear on high-speed rotating parts will reduce compressor performance. Simultaneously, the wear debris can contaminate the refrigerant oil, clog the system, and cause compressor and system malfunctions. Therefore, regular routine maintenance is essential. Today, let's look at the maintenance items and methods for traditional bus air conditioning systems.

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1. Refrigeration System

1.1 Refrigeration Level—Observe through the sight glass on the return air vent pipe or others.

1.2 Pipes—Check for leaks at all joints; check for loose clamps; check for damage or wear on hoses.

1.3 Drier Filter—Assess annually by a professional to determine if replacement is necessary.

2. Compressor

2.1 Refrigeration Oil Level—Observe the compressor fluid level on the mirror.

2.2 Shaft Seal—Check for oil leaks using white paper.

2.3 Belt—Check belt tension and wear.

2.4 Bolts—Tighten any loose bolts.

2.5 Electromagnetic Clutch – Check if the clutch engages normally when the air conditioner is on; check if the clutch disengages normally when the air conditioner is off; check for severe burning, abnormal noise, oil stains, etc. on the electromagnetic clutch; replace or clean the oil stains.

3. Condenser

3.1 Clean and remove contaminants from the condenser core

3.2 Check if the fan motor is operating normally.

4. Evaporator

4.1 Clean and remove contaminants from the evaporator core

4.2 Check if the fan motor is operating normally

4.3 Clean the core filter

4.4 Clean the fresh air damper filter

4.5 Clean the return air grille filter.

5. Electrical System

5.1 Check if the wire clamps and plugs are loose

5.2 Check the condition of electrical components and fuses in the electrical control box

5.3 Test the high-pressure and low-pressure operation of the pressure switch.

6. Engine

6.1 Check the discharge capacity of the battery

6.2 Check the belt tension and wear

6.3 Check the engine speed and whether there is insufficient power when the compressor is working

6.4 Test the voltage at the generator output terminal.

7. Compressor tensioner bearing – Check if the tensioning rotation is normal.

8. Air purifier – Clean the surface of the purifier.

Cling Air Conditioning, as a manufacturer of bus air conditioning in China, is committed to comfortable travel. To date, its global air conditioning fleet exceeds 650,000 units, and in 2024, it became the number one selling automotive air conditioning brand in China. If you are interested in our products and services, please contact us.

If you have any questions please don't hesitate to contact us.

E-mail: marketing@clingac.com

Phone/WhatsApp: +86 18736032501

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