Chery S11 / Chery QQ. Manual — part 75

Chery QQ Service Manual

observed.

If reading becomes greater, it indicates there is leakage. So the system must be

repaired before evacuation operation continues.

If the reading keeps unchanged, it indicates there is no leakage. You can continue

evacuation.

（

6）the total evacuation time should be over 15 mins.

（

7）continue evacuation untill the reading of low-pressure meter is lower than

760mmHg, then turn off the manual valves at both sides.

（

8）stop vacuum pump, remove the center charge hose from the vacuum pump inlet,

then refrigerant can be charged into the system.

III. Refrigerant charge

The air conditioning system is charged with HFC-134a（R-134a）

The part describes how to charge refrigerant into air conditioning system from the

refrigerant tank.

When charging refrigerant which is recovered by the recovery and regenerative unit,

you should follow the methods described in the instruction of device manufactory.

Warning:

Avoid liquid refrigerant to splash into eyes.

Occasionally some liquid refrigerant will exit, which means it’s temperature is lower

than the freezing point. If liquid HFC-134a（R-134a）splashes into eyes, dangerous

hurt will be caused. So you must take satety goggles to avoid these kinds of accidents.

if the HFC-134a（R-134a）splashes into eyes, you should go to hospital for treatment

at once.

Do not wipe your injured eyes by hand, but should wash the splashed part with large

amount of cleaned cold water to increase temperature of the part up to freezing point.

Accept treatment from doctors or ophthalmology professors as soon as possible.

If HFC-134a（R-134a）splashes on skins, treatment for frostbite should be

adopted.

It is not allowed to deal with refrigerant at places where welding is being taken or

there has vapor.

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The refrigerant should be stored at cool and dark places. Do not put it at places of

high temperature, such as the place directly under sunshine or close to fire or in the

car (including trunk).

Avoid to breath in smoke from the burning

HFC-134a (R-134a) which is harmful for

health. The refrigerant must be charged at low pressure side, but absolutely not

allowed at high pressure side.

Charge is not allowed when the compressor is heated. Follow related specification in

operation instruction from manufactory when you fit the chargeg valve to the

refrigerant tank and make a small hole in it.

Pressure meters must be used before and during charge.

The refrigerant tank should be emptied before it is abandoned.

It is not allowed to heat the refrigerant to over 40℃ and put the refrigrerant tank

upside down during charge, otherwise the refrigerant will enter the compressor and

result in troubles, such as compressing liquid refrigerant, etc..

IV. Refrigerant Charging Procedure

（

1）make sure that the hoses are fitted properly after the system is evacuated (see the

left diagram).

（

2）connect the manifold pressure meter, then turn on the charge valve of refrigerant

tank, wash the charge pipe and turn on the manual valve at low pressure side.

Warning: make sure that the manual valve at high-pressure side is turned off fixedly.

（

3）start engine and keep the rotate speed 1000r/min, then turn on air conditioner.

（

4）charge the gas refrigerant into air conditioning system. At this time the

refrigerant tank should be kept straight.

（

5）after refrigerant tank is emptied, change a new one as described in the following

steps:

a. Switch the manual valve off at the low pressure side.

b. Replace the empty refrigerant tank with the newly charged one. When charge valve

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Chery QQ Service Manual

of the refrigerant tank is used, replacement should be done according to method as

described in the following.

①

unscrew the plate nut，return the hole forming pin back and remove the charge

valve of the refrigerant tank.

②

install the removed charge valve on the new refrigerant tank.

③

as long as the refrigerant leaks from the gap between the refrigerant tank and the

charge valve with sizzling noise, you should promptly fix the plate nut and the manual

valve at low-pressure side of the manifold pressure meter.

④

turn the handle of the charge valve clockwise, screw the hole forming pin into the

new refrigerant tank and

perforate a pinhole to make the refrigerant flow.

⑤

you should turn off the manual valve at the low side of the manifold pressure meter

after the system is charged with the specified amount of refrigerant(650g or when the

high/low pressure meters indicate the following specified values respectively.

When the specified amount of refrigerant is charged, the low-pressure meter indicates:

Approximately 245kPa（2.5kg/㎝

2

，

35.5psi）

When the specified amount of refrigerant is charged, the high-pressure meter

indicates:

Approximately 1470kPa（15kg/㎝

2

，

213psi）

V.

Remove

manifold pressure meter

When the air conditioning system has been charged with the specified amount of the

refrigerant, you could remove the manifold pressure meter as per the following steps.

（

1）turn off the manual valve at the low side of the manifold pressure meter ( the

manual valve at the high side should not be turned off during refrigrant charge)

（

2）turn off the charge valve of the refrigerant tank.

（

3）stop the engine.

（

4）wrap the charge hoses with cloth and remove it from the service pipe, which

should be performed quickly.

Warning: the high side is naturally under high pressure, so you should take care of

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your eyes and skin.

（

5）fit the maintenance valve cover.

Section 8 Trouble-shooting

I. Trouble-shooting Chart

Fault Possible

reasons Action

No cold or heat air

Electric magnetic clutch operating

fault

a.fuse blowout or relay fault

b.electric magnetic clutch fault

c.air conditioning system switch fault

d.thermistor fault

e.high-low pressure protection switch

fault

f.wiring or grounding fault

g.no refrigerant

h.ECU fault

Compressor runs abnormally

a.drive belt slacks or has cracking

b.compressor fault

Air blower fault

Expansion valve fault

System leakage

Fusible plug of the

stock solution

drier melts or is blocked

Replace the fuse and check

if short circuit occurs

Check the clutch

Check the switch

Check thermistor

Check the switch

Repair if necessary

Check the air conditioning

pipe line

Replace ECU

Fasten or replace the belt

Check the compressor

Check the air blower

Check expansion valve

Check leakage in system

Check the stock solution

drier

Discontinuous cold air

Electric magnetic clutch slides

ECU fault

Expansion valve fault

Check the electric magnetic

clutch

Replace ECU

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