Chery QQ6 (S21) / S12LHD. Manual — part 148

6.1.5 Remove the inside/outside circulation ventilator.
6.2. Installation Steps
The installation steps are reverse to those for removal.

7. Removal and Installation of Evaporator

7.1. Removal Steps
7.1.1. Disassemble the evaporator assembly (See removal of
Eevaporator assembly)

7.1.2. Remove the air-conditioner harness (See removal of
air-conditioner harness)

7.1.3 Disassemble evaporator water thermostat (Refer to removal of
evaporator water thermostat)

7.1.4 Disassemble mode ventilator connection rod (Refer to removal
of mode ventilator motor)

7.1.5. Remove the temperature control throttle bar

7.1.6. Loosen off the 9 screws on the evaporator shield, and use a
flat head screwdriver to pry off the two clips to disassemble the
evaporator shield.
Note: The sponge seal around housing is for single use only

7.1.7 Remove the evaporator assembly.







7.1.8. Use a wrench to disassemble the expansion valve.
7.2. Installation of the Evaporator Assembly
The installation steps are reverse to those for removal.
After the installation, the system should be evacuated, proper
pressure should be maintained and anti-freeze agent should be filled
to check for any leakage. Check if the radiator is blocked and
pressure air can be used to get it through if it is.

III. Trouble Shooting

Types of pressure deviation

Possible causes

Method for troubleshooting

1.

The pressure at the high pressure
side remains unchanged or just
slightly rises (compared with the
value when the engine stalls); the
pressure at the low pressure side is
within or under the range as
shown; the air conditioner is under
refrigeration.

2.

The pressure at the high pressure
side is normal; the pressure at the
low pressure side is within the
range as shown; the air conditioner
is under refrigeration.

Lack of refrigerant or the expansion
valve fails

Evacuate the refrigerant
●If the volume of the refrigerant is normal
1.

Replace the expansion valve

2.

Refill the refrigerant to the system

3.

Test the pressure again

●If the volume of the refrigerant is short

1.

Check if there is leaking, if there is
fix it

2.

Refill the refrigerant to the system

3.

Test the pressure again

The pressure at the high pressure side is
higher than the specified value; the
pressure at the low pressure side falls
rapidly to within or under the range as
shown; the air conditioner is under
refrigeration.

The blockage or throttling occur

somewhere in the refrigerant
pipelines

The expansion valve fails

Touch the pipelines to feel the temperature
change
●If there exists temperature differences on
several parts of a certain component

1. Dredge the pipe with compressed air

and nitrogen and replace the expansion
valve.

2. Replace the blocked parts.

●If no trouble found:
1. Dredge the pipelines with compressed air
and nitrogen
2. Test the pressure again.

Initially, the pressures at the high and
low pressure sides are normal, but after a
period of time, the pressure at the high
pressure side is higher than the specified
value and the pressure at the low pressure
side is within or under the range as
shown; the air conditioner is under
refrigeration.

The expansion valve fails
There exists vapor in the refrigerant
pipelines

Check for dirt or rust in the expansion valve
and replace it when necessary
●Dredge the pipelines with compressed air
and nitrogen

The pressure at the high pressure side is
higher than the specified value or is too
high; the pressure at the low pressure
side is too high; the air conditioner is
under refrigeration; the compressor
makes exceptional sounds (especially
when just starts the engine).

The refrigerant in the refrigerant
pipelines is excessive
The expansion valve fails or the
compressor is disabled

Evacuate the refrigerant
●If the volume of the refrigerant is normal
1.

Replace the expansion valve

2.

Refill the refrigerant to the system

3.

Test the pressure again

●If the refrigerant is obviously excessive
1. Refill the refrigerant to the system
2. Test the pressure again.
Note: If the system is still off normal after
retesting the pressure, install the expansion
valve, have it replaced and dredge the
pipelines with compressed air and nitrogen,
and then further replace the compressor and
the fluid reservoir and drying chamber.

When turning off the engine, the pressure

at the high pressure side slightly rises

while the pressure at the low pressure

side slightly falls; the air conditioner is

under refrigeration.

The compressor is disabled

Dredge the pipelines with compressed air

and nitrogen

Replace the compressor and the fluid

reservoir and drying chamber

High pressure side is correct, low
pressure side is too low, AC refrigerating
correct, sometimes the evaporator has ice
(even the refrigerant quantity is correct)

The expansion valve fails or the
compressor is disabled

Replace the expansion valve
Refill the refrigerant to the system
Test the pressure again
Note: If the system is still off normal after
retesting the pressure, install the expansion
valve, have it replaced and dredge the
pipelines with compressed air and nitrogen,
and then further replace the compressor and
the fluid reservoir and drying chamber.

1. High/low pressure sides are correct,
AC refrigerating deficiency.
2. High/low pressure sides are correct,
compressor is abnormal (especially when
the engine is started), AC refrigerating
good

The transmission oil in the air
conditioner pipelines is excessive

Evacuate the refrigerant
●Dredge the pipelines with compressed air
and nitrogen
Note: Adjust the volume of the lubricant
when replacing such component of the air
conditioner system as the compressor

The reservoir can not be used

• Puncture
• The sealed part is damaged
• Thread of fasten part is damaged,
outside air entering to system

Replace

82

CHAPTER IX Body Dimension

I. Basic Instructions on BIW Maintenance

Vehicle body maintenance should be carried out by professionals according to the requirements of the

manufacturer, and only in this way will the promises of “rust free” and “paint defect free” be effective.

1.

Only adopt the materials specified by the manufacturer;

2.

When welding the outside metal of the vehicle body, make sure protective coating is applied to the inner

side;

3.

When spot-welding, make sure zinc coating is used;

4.

Before air-tight sealing the welded parts, apply a layer of filling coating to the inner side and outer side;

5.

Before protecting the chassis with paint, apply protective coating to protect the chassis from rock

bumping;

6.

When the coating is sprayed, all opening parts at this position should be secured with fasteners;

In some cases, the vehicle must be placed on a hoister platform, for removal of spare parts may affect the

distribution of various parts in the vehicle body.

Before spot-welding, make sure the battery connector is unplugged, and check if the ventilation is good

enough before welding.

In maintaining the vehicle body in a certain area, take care to protect other vehicles in this area.

Be particularly careful when spraying sand or welding near the oil tank or fuel system, and disassemble them

if the safety can not be assured.

When maintaining or spray-painting the vehicle body, take all possible measures of preventing accidents.

When welding galvanized steel sheets, the spot-welding current should be raised by 30%, and the electrodes

should be pointed, and the clamping force of the electrodes should be increaded; and when doing gas shielded

welding, the welding current should be further intensified.

Do not weld the air-conditioning parts or try to weld the parts on the vehicle whose temperature are easily

raised. When spray-painting the vehicle frame, the temperature either in the drying oven or the pre-heating oven

should not go beyond 80˚C.

Take the following measures during welding operation to prevent shaking the electronically welded

equipment:

1.

Connect the grouding of the electronic welding equipment directly to the welded parts. And check to

make sure no other parts or insulative parts exists between the ground wiring connector and the spot-welded parts;

2.

First disassemble the ECU, and prevent the electronic device or circuit from contacting the ground

wiring connector or welding wire.

Corrections:

The vehicle body and the chassis are manufactured off the production-line by low-temperature tempering and

cold die casting. Therefore, when the metal parts are damage in any accident, the same processes must be used
to restore them, and no heating is allowed. If they are damaged very seriously and can not be restored, the
damaged parts must be removed after the connecting surface is corrected.

The car bodies are made up of various members, pressing panels and other parts, of which the doors are the

most complexly processed parts of the vehicle body. They involve processes like part stamping and welding,
assembly of spare parts and assemblies, for which the dimensional fits and technical requirements are quite