Auto AC Conditioning Compressor For Isuzu mixer truck B220203000007 10S15C DC24V

(I) Pre-operation Inspection and Startup Specifications

1. Pre-startup Inspection: Confirm that the compressor wiring harness is securely connected, the clutch is free of sediment and oil stains, the belt tension is moderate (belt deflection ≤ 8mm when pressed), and there is no cracking or aging.
2. Startup Sequence: Start the engine first and let it idle stably for 1–2 minutes before turning on the A/C switch to avoid damage to the compressor caused by cold start impact.
3. Idle Operation: Run the air conditioner at idle speed for more than 15 minutes every week to prevent oil seal drying, component "cold welding", and maintain lubrication and sealing performance.

(II) Safety and Efficiency Points During Operation

1. Working Condition Adaptation: Avoid long-term high-load operation in high-temperature environments; switch between internal and external circulation regularly to prevent evaporator frosting or system overpressure.
2. Pressure Monitoring: When cooling capacity is insufficient, prioritize checking the refrigerant pressure. Excessively low low pressure may indicate leakage, while excessively high high pressure requires troubleshooting of condenser blockage or fan malfunctions.
3. Prohibited Operations: It is strictly forbidden to forcibly start the compressor when refrigerant is leaking or in an oil-free state to avoid internal wear or seizure of the compressor.

(III) Key Maintenance Procedures

1. Periodic Maintenance: Inspect the belt, filter element, and refrigerant pressure every 250 working hours; replace the air conditioning filter element every 1000 working hours and clean the condenser fins.
2. Refrigerant Filling: Evacuate air for at least 30 minutes to remove moisture; fill the refrigerant strictly according to the manual to avoid reduced cooling efficiency or compressor damage due to overfilling or insufficient filling.
3. Component Replacement: When replacing the compressor, replenish the corresponding amount of refrigerant oil, and check whether the drying bottle and expansion valve are blocked; replace them if necessary.
4. Long-term Storage Protection: If the machine is shut down for more than two weeks, start the air conditioner for 5 minutes every month; run it at idle speed every two weeks in winter to prevent oil separation and component seizure.