NANO

HVAC 841 HVAC 10.2 MAINTENANCE OF HVAC / A/C SYSTEM Routine servicing, apart from visual checks, is necessary for the maintenance of HVAC / A/C system: 1. Clean condenser with awater hose or air line, clean the fins of the condenser to remove flies, leaves, etc. Check the pipe connections for signs of oil leakage. Dirty & clogged condenser results in A/ C tripping and less cooling. 2. Maintain proper refrigerant level as less refrigerant results in a. Less cooling b. Excessive Refrigerant Results inA/C tripping and less cooling 3. Check pipe connections of compressor for signs of oil leakage. Check flexible hoses for swelling. 4. Add recommended oil and quantity in the compressor during refrigerant charging as adequate quantity of compressor oil prevents the poor pumping and premature wearing of internal components. Inadequate quantity of oil also results into vane chattering noise. 5. Clean evaporator periodically to remove dust and foreign particles as clogged evaporator results in less air flow and reduced cooling. This is possible only if HVAC is removed. 6. Adjust proper engine rpm as lesser rpmwill result in stalling of engine and less cooling. 7. Check coolant level and ensure proper engine tuning as this will prevent overheating of engine. 8. Check proper belt tension as loose belt will slip and overtightened belt will result in noise and premature failure of magnetic clutch of the compressor. 9. Do not operate A/C without refrigerant in the system as this will result in premature failure of the compressor. 10. Do not perform a leak test of theA/C system with more than 20 kg / cm 2 pressure as higher pressure may result in damage to theA/C system components. 11. Do not leaveA/C joints open as moisture tends to enter the A/C system if the joints remain open for long time. 12. Do not charge refrigerant in the A/C system without carrying out proper vacuum as improper or no vacuuming of theA/C system results in less cooling conditions. 13. It is recommended to use A/C with fresh mode open as this will lead to mixing of outside air with cold air inside thereby reducing cooling effect. 14. Always ensure that the magnetic clutch is getting engaged and disengaged when A/C switch gets turned ON and OFF. In case the compressor is running continuously (even when A/C switch is turned OFF), disconnect the compressor connector at engine end and take the vehicle to nearest authorized service station.