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SsangYong Rexton. Manual - part 627

SSANGYONG Y200

7B-10 GENERAL HVAC SYSTEM

DIAGNOSTIC INFORMATION AND PROCEDURES

GENERAL DIAGNOSIS

Check the fuse

Check the A/C switch

Check the triple switch (DSL: Dual switch)

Check the thermo switch (GSL)

Check the compressor relay

Check the magnetic clutch

Check the A/C control unit

Check the refrigerant capacity

Check the receiver-drier

Check the drive belt’s tension, slip of the
compressor and clutch

Check the compressor

Check the expansion valve

Check the Duct joint

Check the intake air temperature switch

Check the blower motor

Check the resistor, connector

Measure the pressure

Check the expansion valve

Check the refrigerant capacity

Check the receiver-drier

Check the fin’s surface and crack of the
tube, tank

Check the refrigerant capacity (Verify the
capacity higher than high pressure)

Check the drive belt’s tension

Check the compressor

Check the pressure

Check the expansion valve

Replace

Adding refrigerant

Replace

Adjusting belt

Replace

Evacuating and
charging refrigerant

Replace

Adding refrigerant

Replace

Cleaning surface,
Replace

Recharging
refrigerant

Adjusting belt

Replace

Evacuating and
charging refrigerant

Replace

Check

Symptom

Magnetic clutch switch don’t

turn ON.

Insufficient refrigerant

Faulty receiver-drier

Abnormal rotating of
compressor

Abnormal compression of
compressor

Faulty expansion valve

Duct joint leak

Evaporator frozen

Faulty blower motor

Blower 1th - 3th inoperative,
4th operative

There is air in the refrigerant

Faulty expansion valve

Insufficient refrigerant

Faulty receiver-drier

Faulty condenser

Excessive refrigerant in the
system

Abnormal rotating of com-
pressor

Insufficient compression of
compressor

There is air in the unit.

Faulty expansion valve

Airflow not
cold.

Action

Airflow is
cold but
insufficient.

Airflow is
not
continuous.

Insufficient
cooling.

GENERAL HVAC SYSTEM 7B-11

SSANGYONG Y200

DIAGNOSIS USING THE MANIFOLD GAUGE

On normal operation during the cooling cycle, the
manifold gauge must indicate approximately 1.5 - 2.0
kg/cm

at low pressure side and 14.5 - 15 kg/cm

high pressure side, on condition that the temperature
at the cooler inlet, 30

C - 35

C, 2,000 rpm of the

engine rpm , full cold and maximum blower speed.

Cause

Symptom

Action

1. High and low pressure are abnormally low.

2. Air at cooler outlet is not cold.

1. High and low pressure are abnormally high.

2. Connection at the low pressure is not cold.

•

There is a gas leak in the
cooling system.

•

Insufficient cooling and
faulty condenser cooling
by excessive
refrigerant.

•

Belt is slipped

•

There is an air in the
cooling system

•

Check the oil leak,
repair

•

Add the refrigerant

•

Keep the specified
amount of the
refrigerant, Clean the
condenser

•

Repair the belt

•

Clean and repair the
receiver-drier

•

Check the oil
contamination etc.

YAD7B070

YAD7B080

YAD7B100

YAD7B090

SSANGYONG Y200

7B-12 GENERAL HVAC SYSTEM

1. The low-pressure and high-pressure are exces-

sive high.

2. There are a lot of moistures in the connection

of the low-side pressure

Cause

Symptom

Action

1. The low-pressure side indicates excessive high

and high-pressure indicates excessive low.

2. There is a moisture in the connection of the re-

ceiver-drier and the front/back of the expan-
sion valve.

1. The low-side pressure is high or normal inter-

mittently.

•

The dust and moisture
etc. are frozen at the
expansion valve

•

A gas leak in the heat
reducer

•

The mixed moisture is
frozen at the expansion
valve

•

The faulty expansion
valve, the improper
installation of the heat
reducer

•

Fail to control the flow
rate

•

Repair the receiver-drier

•

Replace the expansion
valve for the faulty heat
reducer

•

Repair the receiver-drier
and perform the
bleeding

•

Repair the receiver-drier

•

Check the oil
contamination etc.

1. The low-pressure is excessive high and high-

pressure is excessive low.

•

There is an oil leak in
the compressor

•

Replace the compressor

YAD7B110

YAD7B130

YAD7B120

YAD7B140

GENERAL HVAC SYSTEM 7B-13

SSANGYONG Y200

REFRIGERANT CHARGING

Installation of Manifold Gauge

1. Close both high/low pressure hand valves of

manifold gauge before installation of gauge to the
charging valve.

2. Both high/low pressure hand valves of manifold

gauge connect the appropriate charging valve.
Tighten the hose nuts by hand.

•

high pressure hand valve

→

high pressure

charging valve

•

low pressure hand valve

→

low pressure

charging valve

Discharging Refrigerant

1. Connect the manifold gauge to the charging valve.

2. Place the free end of the center hose in a shop

towel.

3. Slowly open the high pressure hand valve and

discharge refrigerant.

Notice: If refrigerant is allowed to escape too fast,
compressor oil will be drawn out of the system.

4. Check whether the shop towel gets wet in oil and

if wet, close the hand valve.

5. After the high pressure gauge reading drops below

3.5 kg/cm

, slowly open the low pressure valve.

6. When both high and low pressure gauges reading

drops to 0 kg/cm

, discharging is completed.

Evacuating Refrigeration System

Notice: The unit tank must contain a sufficient amount
of R-134a refrigerant for charging. Check the amount
of refrigerant in the tank. If there is less than 3.6 kg
(8 pounds) of refrigerant, add new refrigerant to the
tank.

1. Verify that the high-side and the low-side hoses

are connected to the A/C system. Open both the
high-side and the low-side valves on the unit’s
control panel.

2. Open both the gas and the liquid valves on the

tank.

YAD7B150

YAD7B160

YAD7B170

MAINTENANCE AND REPAIR

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