Chery S11 / Chery QQ. Manual - part 77

   Chery QQ Service Manual 

should be dropped on the seat surface of the connecting nut and the O-shape of seal 

ring. 

（

4）when the joint is screwed or unscrewed, two wrenches should be used, one is for 

tightening, the other for supporting. 

（

5）inlet connecting pipe of the stock solution drier should be connected with the 

outlet connecting pipe of the condensator. 

（

6）tighten the pipe socket nut according to the following required tightening torque. 

Tigntening torque for connecting nut：8 ㎜ pipe：12-15N·m 

（

1.2-1.5kg-m.8.6-11.01b-ft）1/2 inch pipe：20-25N·m 

（

2.0-2.5kg-m.14.5-18.0Ib-ft）5/8 inch pipe：30-35N·m 

（

3.0-3.5kg-m.22.0-25.3Ib-ft） 

（

7）water drain hoses should be arranged in the way that the drained water should 

not drop on the parts of the car. 

3. Recovery of the refrigerant 

Refrigerant recovery and regenerative unit must be used when refrigerant is 

discharged from air conditioning system. Directly discharging refrigerant HFC-134a

（

R-134a）into atmosphere will bring serious effects on environment. 

Note: when using recovery and regenerative unit, you must follow the operating 

instruction of the device. 
 

4. Management of refrigerant   

（

1）when dealing with refrigerant, you must take the safety goggles to protect your 

eyes. 

（

2）avoid to touch liquid refrigerant directly. 

（

3）the refrigerant tank should not be heated over to 40℃. 

（

4）it is not allowed to discharge the refrigerant to the atmosphere. 

（

5）it is not allowed to splash the refrigerant to the polishing metal surface because 

the corrosive combination of refrigerant and water can make the polishing metal 

surface dislustered (including chromium-coated part). 

（

6）after refrigerant of the system is recovered, lost oil in compressor must be 

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   Chery QQ Service Manual 

determined and make-up the same amout of oil. 

Warning: if refrigerant HFC-134a（R-134a）splashes into eyes, you should go to 

hospital for treatment quickly. 

It is not permissible to wipe your hurted eyes, but to wash them with a large amount 

of clean cold water to make the temperature of your hurted parts rise to the freezing 

point. 

Must go to see doctors or ophthalmology professors for treatment. If HFC-134a

（

R-134a）liquid splashes on skin, the hurt should be treated in the same way as the 

frostbite treatment.

 

 

Section 10 Check Refrigerant System with Manifold 

Measurement Unit 

 

I. This method serves to confirm the fault position with manifold 

measurement unit 

Read the manifold pressure meter when the system reaches the following status: 

（

1）set the switch on the circular position ,    the supplying air temperature is 30-35

℃

 

（

2）the engine runs in 1500r/min. 

（

3）set the 

rotate speed control switch of supply fan at high speed.

 

（

4）set the temperature control switch at the position where the cold air is most 

sufficient. 

Note：It should be indicated that the readings of the meter will change slightly 

depending on the environment termperature. 

1. Refrigeration system works normally 

Reading on meter： 

Low pressure side：0.15-0.25

 MPa

（

1.5-2.5kg/cm

2

）

   

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   Chery QQ Service Manual 

  High pressure side：1.37-1.57

 MPa

（

14-16kg/cm

2

）

 

 

 

 

 

 

 

 

 

 

 

 

 

2. 

Water vapor exists in the refrigeration system.

 

Symptom

：

discontinuous cold air to no cold air. 

 

 

 

 

 

 

 

 

 

 

Fault symptom of 

refrigeration 

system

 

Possible reasons 

Fault diagonosis 

Troubleshooting 

action 

When running, pressure  The  vapor 

entering 

Drier is in 

（

1）replace the stock 

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   Chery QQ Service Manual 

at low pressure side 

sometimes is normal, 

but sometimes vacuum. 

the refrigeration 

system ices in the 

spraying hole of 

the expansion valve 

to make the 

circulation stop 

temperarily, but 

after the ice melts, 

it can work 

normally. 

oversaturation 

↓ 

Water vapor ices at 

the spraying hole of 

the expansion valve to 

block circulation of 

refrigerant. 

solution drier 

(2) evacuate air 

repeatly to eliminate 

the vapor in the 

circulation. 

(3) charge appropriate 

amount of new 

refrigerant. 

                                   

3. Insufficient refrigerant 

Symptom：insufficient cold air   

 

 

 

 

 

 

 

 

 

Fault symptom of 

refrigeration system 

Possible reasons

Fault diagonosis Trouble-shooting 

action 

Low pressure at both 

low pressure side and 

high side 

 

bad cooling Performance 

air leakage at 

somewhere in 

refrigeration 

system 

Insufficient 

refrigerant in system

↓ 

Refrigerant leakage 

（

1）using air leakage detector to 

check where there is leakage. 

If necessary, repair it. 

（

2）charge appropriate amount 

of refrigerant. 

（

3）if the reading is about 0 

after connecting the meter, the 

leakage positions should be 

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