COMPONENTS OF THE AIR CONDITIONING SYSTEM Troubleshooting

COMPONENTS OF THE
AIR CONDITIONING SYSTEM
Troubleshooting


 
AIR CONDITIONING SYSTEM


Compressors:

Compressors auto


The air conditioning compressor is usually driven by the engine via a belt or ribbed V-belt. The compressor compresses and transports the refrigerant in the system. There are different designs available.

The refrigerant is sucked in as a gas at low temperature from the evaporator; it is then compressed. It is then forwarded in a gaseous state at high temperature and high pressure to the condenser.
The compressor can be dimensioned depending on the size of the system. The compressor is filled with special oil to provide lubrication. Some of the oil circulates through the air conditioning system with the refrigerant.

Condensers:

Condensers auto

The capacitor is needed in order to cool the refrigerant that is heated up by the compression in the compressor. The hot refrigerant gas flows into the condenser and transfers heat to the  surroundings via the pipe and fins. As it cools down, the state of the refrigerant changes again from gaseous to liquid.

How they work
The hot refrigerant gas flows on top into the condenser and transfers heat to the surroundings via the pipe and fins. Due to cooling down the refrigerant exists the condenser at the lower connection in liquid state.

Effects of failure
A defective condenser may exhibit the following symptoms:
*    Poor cooling performance
*    Failure of the air conditioning system
*    Continuously running condenser fan

Causes for occurring faults can be:
*    Leaks at the connections or caused by damage
*    Insufficient heat exchange due to contamination

Troubleshooting
Test steps for fault elimination:
*    Check condenser for contamination
*    Check for leaks
*    Pressure test on the high and low pressure sides
 
Filter dryer: 
Filter dryer auto

The filter elements of the air conditioning system are either referred to as filter dryers or accumulators, depending on the type of system. The task of the filter dryer is to remove impurities from the refrigerant and to dehumidify it
.How they work
The liquid refrigerant enters the filter dryer, flows through a hygroscopic drying medium and leaves the filter dryer again as a liquid. The upper part of the filter dryer serves as a compensation chamber; at the same time, the lower part serves as refrigerant storage in order to compensate fluctuations in pressure in the system.

Depending on its design, the filter dryer can only remove a certain amount of humidity - then the drying medium is saturated and no longer in a position to absorb further humidity.

Effects of failure
A failure of the filter dryer may exhibit the following symptoms:
*    Poor cooling capacity
*    Failure of the air conditioning system

Causes for the failure of the filter dryer can be:
*    Aging
*    Defective filter pad inside
*    Leaks at the connections or caused by damage

Troubleshooting

The following steps are to be considered during troubleshooting:
*    Verify maintenance intervals (every 2 years)
*    Leak test/correct fit of the connections/damage
*    Pressure test of the high and low pressure sides


                                   abo bahaa eddine

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