Chery A15. Manual — part 134

refrigeration system, the fusible plug will metal so as to
drain off the high-temperature and high-pressure coolant
when the temperature and pressure inside the reservoir
reach the specified value, which protects the
refrigeration system.

4. Introduction to the expansion valve and pressure
switch

1) Expansion valve

Chery A15LHD adopts the traditional thermo-expansion
valve, as shown in the figure, fixed on the inlet/outlet
pipes of evaporator.
The temperature sensor inside the expansion valve
adjust the opening of ball valve in accordance with the
temperature of coolant located at the evaporator outlet,
the purpose of which is to control the flow rate of
coolant.

2) Pressure switch

Chery A15LHD’s A/C pressure switch adopts the
dual-pressure (high and low pressures) and four-wire
pressure switch which is installed on the high pressure
pipe located at the front end of expansion valve, with 50
PSI or more of low-pressure CLOSE operation and
220 PSI or more of high-pressure CLOSE operation

5. Removal/Installation and inspection of evaporator

(1) Drain off the coolant from the system (see the

coolant recycling procedure)

(2) Remove the expansion valve

(3)

Remove the instrument panel (see the
Disassembly/Assembly of Instrument Panel)

(4)

Remove the control panel trim plate, and 4
self-tapping screws used to secure the control panel
and console. (tightening torque of 1.5±0.2N·m)

(5) Remove 1 bolt (M8*25) and 4 nuts secured with the

steering crossbeam and front side respectively
(tightening torque of 3.5±0.2N·m) from the fixed
evaporator.

(6) Remove the four bolts from the evaporator.

Inspection of evaporator:

U-18

(1) Check the crack, damage or oily fluid leakage.

·

Replace the evaporation unit if any failure above

occurs.

(2) Check the bent of fender.

·

Use a flat headed screwdriver to straighten it if a bent

is found.

The Chery A15LHD adopts the tube-fin type evaporator
which is installed in the air conditioning unit assy. under
the instrument panel.

The function of evaporator is opposite to that of
condenser. After expanded in the expansion valve, the
coolant fluid absorbs the heat inside the vehicle from the
evaporator, and evaporates to the coolant gas, then
enters into the compressor to circulate.

Introduction to the evaporator temperature sensor
(thermostat):

The evaporator temperature sensor used by the Chery
A15LHD is the heat-sensitive tube mechanical type
temperature regulator, which is closed when the working
temperature is adjusted to 4

or more while

℃

disconnected when adjusted to 4

or below. Its

℃

installation position is just under the evaporator, as
shown in the figure.

The tightening parameters of A/C pipe fasteners

Inner hexagonal head bolt (M10) secured in the
compressor: 30N•m;
Inner hexagonal head bolt (M6) secured in the
expansion valve: 7N•m;
To connect with condenser inlet pipe and tighten the
nuts: 32 N•m;
To connect with condenser outlet pipe and tighten the
nuts: 11.9 to 13 N•m;

U-19

FAILURES AND SHOOTING ANALYSIS SHEET

1. Precautions on A/C system installation

(1) For the pipes fixed using the fixing nuts, two

wrenches must be applied to ensure that the
pipes don't deform or break;

(2) Do not use the compressed air to clean the pipes,

and the nitrogen or coolant gas is available;

(3) Correctly assemble it, and check the tightening

torque of all connections as required;

(4) Check all parts to ensure that they aren’t damaged

and all adjacent parts don’t interfere each other;

(5) Conduct the leakage test to ensure there is no

leakage in the A/C system.

U-20

PRECAUTIONS ON THE SECURITY OF A/C SYSTEM

Coolant treatment

1. The operator shall pay more attention to prevent the coolant fluid from spraying into
your eye or on your skin because the fluid-state coolant is very dangerous. Only one drop
of coolant will cause your skin to be damaged partially if it drops up the skin of the skin.
You must put on your grooves and protective goggles. When the coolant sprays into your
eye or on your skin

(a) Use the cold water to clean those parts

(b) Do not wipe your eye or skin

(c) Immediately get to a hospital to have a professional personnel treat it.

It is recommended to use such equipment as the recovered, recycling, or reused equipment. If
there is any emergency system failure, it is recommended that the equipment is placed on a
ventilation treatment site before the implementation of the equipment maintenance service.

2. Do not dispose the coolant located at a closed place or near fire. If the coolant gas contacts
with sparks or the similar heat source (such as: cigarette or heater), it will generate the toxic
gas.

Storage of coolant
A6E851001039W02

1. The coolant shall be stored in the high-pressure resistance equipment, and take care to
slightly place the fluid reservoir to prevent the reservoir from being impacted by some sharp
materials. Heating the coolant fluid reservoir or taking it near the fire will make it explode,
and the metal fragment generated and the sputtered fluid-state coolant will cause the serious
injury to people. It is recommended to store the coolant under the environment of 40

0

C

(104

0

F) below.

Safety Notices

1. Do not sit inside the vehicle which operates at the idle speed for a long time, and also do

not leave a child in the vehicle.

2. Switchover the air conditioner to the external circulation mode and inhale the fresh air

into the vehicle from the outside, and change the blower switch to the High-Speed
position when the engine has operated in an unclosed environment for a long time.

3. Avoid the open of luggage boot cover during driving because the gas emitted from the

engine may enter into the vehicle. If the boot cover must be opened, please close all
windows, and change the air conditioner to the external circulation mode to inhale the
fresh air into the vehicle from the outside.

4.

Do not open the high-pressure valve of manifold pressure gauge during the operation of
compressor. If the high-pressure valve is opened, the coolant will flow in the reverse
direction and cause the fluid reservoir to be broken.

U-21