air conditioning GEELY MK 2008 User Guide

5-79 Air conditioning switch: switch on
So door is completely open
(1) Refrigerating system meter reading during normal work:
Low pressure side: 0. 15-0. 25MPa
High pressure side: 1. 37-1. 57MPa
(2) System contains moistureSymptom Possible cause Diagnosis Correct treatment 1. During work, pressure
on low pressure side some-
times becomes vacuum
2.Intermittent refrigeration,
finally no refrigerationMoisture in the system
freezes at orifice of expan-
sion valve, circulation
suspends, but system re-
stores to normal after ice
thaws1. Drying agent is in satu-
rated state
2.System moisture
freezes at orifice of ex-
pansion valve, obstructs
refrigerant circulation1. Replace stock solution dry-
ing agent
2. By drawing off air repeti-
tively to remove water vapor in
the system, fill in appropriate
quantity of new refrigerant Pressure gauge indication when there is moisture in the system (3) Poor coolingManifold pressure gauge indication in case of poor cooling1. Pressure on high, low
pressure side is a bit low
2. Successive bubble ap-
pears in glass window
3. Refrigeration efficiency
deterioratesRefrigerant leakage
occurs in refrigerat-
ing system1. System refriger-
ant is insufficient
2. Refrigerant leaks1. Use leak detector to check whether
there is gas leakage, repair if there is any.
2. Fill in appropriate quantity of refriger-
ant
3. Connect a pressure gauge, if pressure
is zero, repair leaking part, and vacuumize
the systemSymptom Possible cause Diagnosis Correct treatmentAir Conditioning System -Refrigerant

(4) Poor refrigerant circulation1. Indicates vacuum on low pres-
sure side, indicates too low pres-
sure on high pressure side
2. There is dew or frost on pipe
before and after expansion valve
or stock solution drier1. Pressure on high, low pressure side is a bit low
2. Pipeline from stock solution drier to main set frosts
3. Refrigeration is insufficientDirt in refrigeration
drier obstructs flow
of refrigerantStock solution
drier does not
circulateReplace stock
solution drierManifold pressure gauge indication in case of poor refrigerant circulationaSystem con-
tains moisture
or dirt which
obstructs flow
of refrigerant
Expansion
valve failureRefrigerant
does not cir-
culate1. Check expansion valve
2. Use compressed air to eliminate dirt of expan-
sion valve, but it cannot be eliminated, replace
expansion valve.
3. Vacuumize and fill in appropriate quantity of
new refrigerant
4. Expansion valve leaks, replace expansion valve Manifold pressure gauge indication in case of no refrigerant circulationa (5) Refrigerant does not circulateAir Conditioning System -Refrigerant5-80Symptom Possible cause Diagnosis Correct treatment
SymptomPossible cause Diagnosis
Correct treatmentWhen there is too much refrigerant or heat dissipation of condenser is poor (6) Too much refrigerant or heat dissipation of radiator is poor

Air Conditioning System -Refrigerant5-811. Too high pressure on the
high and low pressure side
2. Even with decreasing engine
speed, no bubble can be seen
through view glass
3. Refrigeration is insufficient1. Excessive refrigerant,
not utilizing the efficacy
of refrigerant
2. Poor heat dissipation
of condenser1.Excessive refrigerant is
circulating
2. Insufficient refrigera-
tion in condenser, block
of condenser radiator or
fan fault1. Clean condenser
2. Check operation of fan
motor
3.Check the amount of
refrigerant, and fill in proper
amount of refrigerant1. Pressure on high, low pressure side
is too high
2. Touch thesuction hose, it is hot
3. Bubble appears in glass window,
cooling is not goodThere is air in
refrigerating
system1. There is air in re-
frigerating system
2. Vacuumizing is
not complete1. Check whether compressor
lubricating oil is dirty or insuffi-
cient
2. Pump off air and fill in appro-
priate quantity of refrigerantThere is air in the system. (7) There is air in the system (8) Expansion valve fault1. Pressure on high, low pressure
side is too high
2. There is frost or a great deal of
water drops on pipeline of low
pressure sideRefrigerant in low-pres-
sure line is too much
2. Expansion valve is opened
too largeCheck expansion
valveExpansion valve failureSymptom Possible cause Diagnosis Correct treatment
Symptom Possible cause Diagnosis Correct treatment Symptom Possible cause Diagnosis Correct treatment
Expansion valve fails1.

1 pressure is too high on low
pressure side, pressure on high-
pressure side is too low
2. Without cold airInside sealing of compressor
is poorCompressor fails, valve
leaks or is damaged.Repair or replace
compressorCompressor failure (9) Compressor poor compression faultDischarge and fill-up of refrigerantDischarge of refrigerant
In case of depletion, surrounding environment should always be
well-ventilated, do not approach open fire, otherwise toxic gas might
be generated.
(1) Firstly turn off meter valve high low manual valve, connect
pipeline according to the figure below, then adjust air conditioner to
maximum refrigeration operating condition, adjust engine speed to
1000 - 2000 r/min, run for 5 min. Circulate refrigerant and collect
residual oil in parts as far as possible into compressor.Symptom Possible cause Diagnosis Correct treatment (2) Loosen throttle, let engine restore to normal idle speed, turn off engine.
(3) Slowly open high voltage manual valve,cover a white towel on hose outlet,observe whether there is oil stain
on the towel, adjust flow of refrigerant.
(4) When high pressure gauge reading decreases to below 0. 35MPa, slowly open low pressure manual valve.
Close manual valve until reading of high low pressure gauge is zero.Fill-up of refrigerant (1) Use vacuum pump to vacuumize the system
During repair of refrigerating system, once refrigerating system is exposed to air or certain refrigerating
system part is to be replaced, automobile air conditioner must be vacuumized. So as to eliminate air and
water vapour in the system.
(2) Fill in R134 a
Standard: 420 ± 10 g (Dongfeng Painen System)
440 ± 20 g (Tianjing Sando System)Air Conditioning System -Refrigerant5-82Compressor
Gathering tank

Air Conditioning System -A/C Operating Mechanism5-83Section 3 A/C Operating Mechanism1. Remove heater control and attachment assembly
(1) Remove three control knobs.
(2) Remove two screws and middle instrument board
subassembly.
(3) Loosen six lock catches, pull out heater control and attach
ment assembly
2. Remove the operation mechanism
(1) Loosen the fixed clip (air distributor) and remove the air mit
damper conrol cable.
(2) Loosen the fixed clip (air distributor) and remove air inlet
mode selector cable.:clip:clipClamp

(3) Loosen the fixed clip (air distributor) and remove the adjust-
ment vent cable.
(4) Loosen 3 fasteners on the operation mechanism and remove
the operation mechanism assembly.
3.Remove the cable of the operation mechanism
(1) Loosen the fixed clip and remove air inlet mode selector cable.
(2) Loosen the fixed clip and remove the air mit damper conrol
cable.
(3) Loosen the fixed clip and remove the adjustment vent cable.
Notice: Do not twist the cable,otherwise the air conditianing
operation mechanism does not work normally.:clipAir Conditioning System -
A/C Operating Mechanism5-84Clamp

Air Conditioning System -A/C Operating Mechanism5-855. Install the control mechanism assembly
(1) Replace the damaged part, installation is in the reverse order of removal.
(2) Notice:

When installing the warm and cold adjustment damper cable on the head unit of the air conditioner, set
the rocker arm connecting the cable to the maximum travel position of the damper for refrigeration, then
press the cable in the clamp. Do not twist the cable. Check that the temperature control knob on the
rotation panel can stop at both the maximum refrigeration and maximum heating positions and won't
resile.

When installing the inner and outer cycle damper cable on the head unit of the air conditioner, set the
rocker arm connecting the cable to the maximum travel position of the inner cycle, then press the cable
in the clamp. Do not twist the cable. Check that the air intake adjustment rod on the rotation panel can
stop at both the inner and outer cycle maximum positions and won't resile.

When installing the outlet vent adjustment damper cable on the head unit of the air conditioner, set the
rocker arm connecting the cable to the maximum travel position of face mode, then press the cable in
the clamp. Do not twist the cable. Check that the airflow selector knob on the rotation panel can stop
at both the face mode and defroster heating positions and won't resile.4. Remove the inner and outer cycle flipper
Unscrew the retaining buckle and the inner and outer cycle
flipper.Clamp

Section 4 Heater, Ventilation and Air ConditioningComponent View INo. 2 coolant TankNo.1 coolant Pipe Dual Steel Wire Circlip
Exhaust Pipe Exhaust Pipe Seal
RingSeal Ring A/C Head Unit AssemblyAir Conditioning System -Heater, Ventilation and Air Conditioning5-86

air inlet case
air screen
screen support
Type H expansion valve
evaporator core
thermistor blower with impellor
assembly
rear air outlet case lower caseupper caseheater core heater core
clipComponent View IIAir Conditioning System -Heater, Ventilation and Air Conditioning5-87

Overhaul1. Drain the coolant (refer to Coolant for details).
2. Disconnect A/C pipeline assembly.
(1) Remove the bolt, disconnect A/C pipeline assembly
(2) Remove 2 O-rings form the A/C pipeline assembly.
Notice: O-ring is a non-reusable part.
3. Disconnect the water pipe assembly connecting the heater core.
Loosen the dual steel wire circlip, disconnect the water pipe
connecting the heater core.
4. Remove console assembly
Refer to Interior Trim: Removal of the Console Assembly
5. Remove central cross member assembly
(1) Unscrew the wire harness clip and screw.
(2) Remove the nut and bolt.
(3) Remove cross member assembly.
6. Remove A/C lower left and right air outlet pipe
(1) Unscrew the two clips, disconnect the A/C lower left air outlet
pipe.
(2) Unscrew the two clips, disconnect the A/C lower right air
outlet pipe.5-88clip clipclip
screw,nut and
boltAir Conditioning System ¡ª¡ªHeater, Ventilation and Air Conditioning