The reasons for air condition of producing odors and not cooling air

Hubei Chang Jie Special Purpose Vehicle Co.,Ltd: scorching summer heat, automobile(sweeper truck,dump truck ,fire truck,...) air conditioning is used especially frequency and becomes particularly diligent. When summer comes, many driver friends tell that after the air conditioning turned on, there will be air conditioning in the shares of unpleasant smell, people feel dizzy , nausea and sore throat. In addition to maintenance personnel of auto 4S shop explain that: this is the car air conditioner air polluted! Car air conditioning system is mainly consisted of a compressor, a condenser, accumulator, expansion valve, evaporator, fans and piping and control components and so on! Below. Hubei Chang Jie Special Purpose Vehicle Co., Ltd will introduces you the reason and solutions about air conditioning's not cooling. 
The causing odors reason of automotive air conditioning: 

mostly due to the condensate accumulation in the air-conditioning duct. In the rainy season, the water vapor will be attached to the upper evaporator Evaporator and automotive air conditioning and wet dust accumulation, when air conditioning started, there will be unpleasant smell.
Solutions of air conditioning odor:

Timely clean evaporator and keep air conditioning evaporator dry to reduce bacteria and dust precipitation of breeding. Or after some time opening air-conditioning, before parking,turn off air conditioner and open the natural wind so that the temperature rise inside the air conditioning ducts to ensure that no water vapor attached to the air conditioning evaporator ensuring dry pipeline.Also you can replace filtration, avoid dust debris into the air duct.
Reasons of vehicle(road sweeper truck,dump truck ,advertising truck,...) air conditioning not cooling:
(1) a refrigerant leak, affecting heat dissipation
(2) Compressor capacitor damage or bad, cause the compressor does not work,
(3) room temperature sensor resistance values ​​change, causing the air conditioning unit is not working
(4) bad or poor air-conditioning remote control receivers
(5) the four-way valve (single cooler no such failure) or high and low pressure compressor string gas, air-conditioning operation but no effect
(6) Air conditioning inside or outside the machine control panel so that air conditioning is not cooling failure 

(7) Air conditioning power zero FireWire reversed
(8) inside or outside the machine fan is damaged
Air conditioning is not cooling treatment:
(1) Check the air conditioning evaporator cleaning the air filter is not clogged
(2) After the demolition of the air conditioning filters, evaporator find the vehicle, the car air-conditioning system cleaner filled space evaporator surface and air filter where the original
(3) of the refrigerant caused by too little refrigerant shortage should be added refrigerants