Content .. 74 75 76 77 ..

Chery S11 / Chery QQ. Manual - part 76

Chery QQ Service Manual

Improperly wiring in the circuit

Over damp system

Check the expansion valve

Repair if necessary

evacuate and charge the

system

cold air exists only at high

speed

Condensator is blocked

Drive belt trackslip

Compressor fault

Insufficient or over-charged

refrigerant

Air exists in the system

Check the condensator

Check or replace the drive

belt

Check the compressor

Check the refrigerant charge

Evacuate and charge the

system with refrigerant

Insufficient refrigeration

Condensator is blocked

Drive belt trackslip

Electric magnetic clutch fault

Compressor fault

Expansion valve fault

Thermistor fault

Insufficient or over-charged

refrigerant

Air exists in the system or excessive

oil in the compressor

Stock solution drier is blocked

Check the condensator

Check or replace the drive

belt

Check the electric magnetic

clutch

Check the compressor

Check the expansion valve

Check the thermistor

Check refrigerant charge

Evacuate and charge the

system

Check the stock solution

drier

Insufficient flow speed of

cold air

Evaporator is blocked or frosts

Air leakage in the cooling device or

air ducts

Air inlet is blocked

Air blower motor fault

Check the evaporator

Repair if necessory

Replace the air blower

motor

II Trouble-shooting Chart（electron temperature control system）

143

Chery QQ Service Manual

Phenomenon

Possible position

of the fault

Diagnosis and

measurement

Result Reason

power source is

out of condition

F6 （ 20A ） fuse

voltage 12V

F6 is out of

condition

Without air conditioner

relay power source

air conditioner

relay is out of

conditon

No. 30, 87 pin

voltates for relay

operation are 12V

Relay is out of

condition

Contacts is out of

condition

Air blower
switch

Air blower switch

disconnects the

no.2 pin ground

strap connection

Air blower switch

is out of condition

or no.1 pin does not

ground

Without ground strap

connection signal

output

A/C switch

A/C switch on no.1

A/C switch or

compression is out

of condition

Without ground strap

connection signal

output

pressure switch is

out of condition

Remove the joint,

direct

cross

connection

Switch is out of

condition or

insufficient

pressure

Pressure switch can not

be turned on

temperature

sensor for

evaporator is out

of condition

Resistance value is

over 2KΩ

Sensor is out of

condition or

improper

installation

Detection temperature

is too low

water temperature

for engine is too

low

Check the engine

values

water temperature

sensor is out of

condition

water temperature is too

low , compressor does

not work

The engine is

accelerating

Gasoline throttle

position sensor

normal normal

operation

conditions

The

compressor

does not work

when the air

conditioner

switch is

turned on

ECU is out of

condition

Measure the ECU

no.41, 22 pins

ECU or wiring

ECU cannot deal with

the A/C swich signals

Air blower

does not

duty relay is out

of condition

No.85, 86, 30, 87

pins of the relay

Wiring is out of

condition

Without +12V supplied

to air blower

144

Chery QQ Service Manual

resistance of air

blower is out of

condition

Measuring

resistance is over

0Ω

Resistance is short

circuit

Without speed governing

signal

Switch of air

blower is out of

condition

Measuring switch

conduction

Switch is out of

condition

Without control signal

work

air blower is out

of condition

Remove plug ，

power supply 12V

Air blower breaks

down

replace

F2 fuse

+12V

Break down

replace

High speed fan

relay

measure the relay

and the wiring

replace

Without +12V supplied

to heat emission fan

fan wiring is out

of condition

pin measurement

repair

connection of the pins or

wiring is out of

condition

air blower is out

of condition

Remove the plug

and test with power

replace

Air blower burns out

water temperature

sensor is out of

condition

Check water

temperature for

engine

replace Low

water

temperature

for engine

Pressure switch

Remove the plug,

cross connection

insufficient pressure

of the pressure

switch or pressure

Without switch signals

Fan does not

work （high

speed）

ECU ECU

no.31pin

ground strap

connection

ECU is out of

condition

replace

insufficient

refrigeration

（

clutch

unmovable）

Refer to the

diagonosis

tables metioned

above（reasons

out of the

electron

temperature

control system）

145

Chery QQ Service Manual

Section 9 Maintenance On-board

Note: you should comply with the following rules when maintaining air conditioning

system.

1. Wiring

（

1）remove the accumulator’s negative wire to avoid short circuit.

（

2）the lead connector should be plugged fixedly.

（

3） the gum cover should be fitted in panel holes before wiring arrangement to

protect the wiring bundle.

（

4）connect the wiring bundle of air conditioner to main wiring bundle with

pdythene belt or original binding terminal block.

（

5）if original wiring bundle is removed or stripped when maintaining, you should

put it back to the place where it was.

（

6）original binding terminal block and wiring bundle of the air conditioner should

not be pressed during installation.

（

7）when the leads are welded to the wiring bundle, the two leads should have the

same diameters and the connection should be wrapped with insulated belt.

（

8）the wiring bundle should keep away from the moving elements or high

temperature places.

（

9）it is not allowed that the connection parts is close to the fuel pipe.

（

10）check the wiring bundle if it contacts with sharp edges and corners.

2. Refrigerating

return pipe

（

1）heating

elbow bend pipe is absolutely

impermissible。

The degree of bending should be as small as possible.

（

2）parts in air conditioner should be kept dry and free of dirt.

When removing any pipe of the system, you should fit a cap on the joint of this pipe

as soon as possible.

（

3）when the hose and the metal pipe are interconnected, drops of refrigerating oil

146

Content .. 74 75 76 77 ..