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

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.