【 Weak current College products】 automotive air conditioning system common breakdown resolution 】

Common air conditioning system can be divided into four categories with about: noise, refrigeration, the wind direction is wrong and odor. The following are descriptions of these phenomena and readers.

A noise

Refers to the number of air-conditioning, mechanical relative movement caused by the abnormal sound.

1. the compressor equipment code — when you use air conditioners, normally compressor only if their electromagnetic clutch or separation of a "card", in a very quiet during operation. If the operation had a "long, long" sound, the representative of the compressor may vary due to a lack of refrigeration oil pipeline whereas already wear.

Approach — only to get a new General compressors.

2. belt noise — typically drive the compressor belt tightness inadequate compressor joint load after skidding produces sharp hiss.

Approach — by tightening or replacing a new transmission belt to improve.

3. the fan noise — — here refers to the fan has two branches: one refers to the water tank rear assist secondary refrigerant cooling fan (fan); another means of conveying air blower. If their motor bearing wear, in turn will speed up and intensify the noise.

Approach — replace the fan or blower bearing lubrication.

4. wind and hot water valve — when your actions panel keys to adjust the temperature, the control engine cooling water flow into the heat exchanger of hot water valve will action; when you adjust the angle of the wind, the wind that valve will action. These elements in action might some sounds. If your air conditioning system is electronic thermostat type, so this type of noise may also occur when the engine is not launched, namely the common inside the loudness control console.

Approach — if not serious, whether it; otherwise, you can go to 4S request connection computer 5051 or 5052 software reinitialization and set the relevant motor voltage values.

2 lack of refrigeration

1. refrigerant is not enough — the refrigerant is absorbing heat medium if the refrigerant in the pipeline because of not filling, pipe leakage, mixed with air, the amount of refrigerant in the system are not sufficient, it will cause refrigerant shortage. You can use the air-time from the tank on the transparent window to check the amount of refrigerant in the pipeline, if in the window to see a lot of bubbles, refrigerant quantity is not enough. In addition, the refrigerant to excessive filling can also cause problems of inadequate refrigeration, but also increases the potential of the pipeline leakage.

Approach — supplementary or vacuum leak detection and repair after charging standard pressure of cooling liquid (Polaris for R134a) and compressor oil.

2. the compressor is not running — the refrigerant in the line of duty cycle required depend on the delivery of the compressor, the compressor for refrigerant pressure anomalies, line fault, temperature sensor damage or compressor electromagnetic clutch burned but cannot join operation, inadequate refrigeration will.

Approach--the replacement temperature sensor or electromagnetic clutch.

3. condenser cooling unsatisfactory — after the compressor compresses the refrigerant to high temperature and high pressure gas, relying on condenser cooling and expansion valve for low-voltage step-down party can become a low-temperature liquid refrigerant, finally arrived at the evaporator heat absorption and evaporation compartments. If the condenser (located on the water front) thermal effects, such as: auxiliary fan is not running, condenser fins dirt Yin Plug and so on, will enable media objectionable, reducing liquefaction of cooling capacity.

Avoid method — every time a car wash, using high pressure water from the car in front at the forward style gate will radiator flushing.

If the fan will not turn the replace small fan; necessary professional cleaning condenser.

4. the refrigerant piping blocking — this situation occurs most often in the tank or the expansion valve.

Approach — washing lines and vacuum filling refrigerant and replace the new products.

5. out of the air flow is too small — many cooling problem is due to the air filter is blocked and cause the outlet air volume blown out too small to let drivers feel refrigeration not enough. Now more and more advanced import car device activated carbon filtration network, which indeed could forestall exterior of dust and smell, but is equipped to high pollution areas soon blocked. In addition, many motorists to use air always likes to cold to the coldest wind go to Max, wait until it is too cold or the wind was too noisy to air go small, but very few then

Cold temperature, so it only to air volume to control temperature. This will cause exports excellent cold is not cold inside, and easily lead to release air blow out Frost frozen fog into the evaporator.

Approach — the replacement of the air-conditioning pollen filter. The temperature setting in General 21 degrees, use AOTU mode.

6. mixing with heating — because of the modern automobile air-conditioning systems are combined with air-conditioning and heating, if in need of air conditioning and heating, and board failure and mixed with excessive heating time will cause cooling. This situation can be judged from the two phenomena: the first is that the cold car air-conditioning a hot car for the cold; the second is the engine room of the refrigerant pressure tube (usually diameter thick and covered with insulating material) very cold, but cold is not cold.

Approach — check replace warm air distribution duct pirated motor; check out computer control failure.

Three out of the wind direction is wrong

The most common scenario is unilateral out wind, climbing out of the wind, when except for the poor in fog. Is usually due to the wind direction valve jammed or vacuum containers (for storage engine vacuum to drive direction valve) pipeline leakage. This kind of problem the material is not quite time consuming.

Four smell

Often in rain or a period of time without the use of air-conditioning, open air conditioning a smell the smell, the reason is that the system had mildewed in the damp.

Approach – when the car air conditioner heat after easy maximum temperature maximum hot air, all in all the wind blows hard 3 ~ 5 minutes.