Daewoo Matiz (2003 year). Manual — part 195
7B – 6 MANUAL CONTROL HEATING, VENTILATION, AND AIR CONDITIONING SYSTEM
PRESSURE-TEMPERATURE RELATIONSHIP OF R-134A
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
TEMPERATURE
_
C (
_
F)*
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
PRESSURE
kPa (psig)*
ÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁ
TEMPERATURE
_
C (
_
F)*
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
PRESSURE
kPa (psig)*
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
–8.89 (16)
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
105.70 (15.33)
ÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁ
37.78 (100)
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
856.84 (124.27)
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
–7.78 (18)
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
114.87 (16.66)
ÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁ
38.89 (102)
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
886.56 (128.58)
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
–6.67 (20)
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
124.32 (18.03)
ÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁ
40.00 (104)
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
916.35 (132.98)
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
–5.56 (22)
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
134.11 (19.45)
ÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁ
41.11 (106)
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
947.92 (137.48)
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
–4.44 (24)
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
144.24 (20.92)
ÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁ
42.22 (108)
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
979.64 (142.08)
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
–3.33 (26)
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
154.65 (22.43)
ÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁ
43.33 (110)
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
1012.11 (146.79)
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
–2.22 (28)
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
165.48 (24.00)
ÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁ
44.44 (112)
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
1045.21 (151.59)
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
–1.11 (30)
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
176.65 (25.62)
ÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁ
45.56 (114)
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
1079.14 (156.51)
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
0.00 (32)
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
188.16 (27.29)
ÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁ
46.67 (116)
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
1113.75 (161.53)
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
1.11 (34)
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
200.02 (29.01)
ÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁ
47.78 (118)
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
1149.12 (166.66)
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
2.22 (36)
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
212.30 (30.79)
ÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁ
48.89 (120)
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
1185.18 (171.89)
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
3.33 (38)
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
224.98 (32.63)
ÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁ
50.00 (122)
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
1222.07 (177.24)
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
4.44 (40)
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
238.08 (34.53)
ÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁ
51.11 (124)
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
1259.72 (182.70)
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
7.22 (45)
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
272.49 (39.52)
ÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁ
52.22 (126)
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
1298.12 (188.27)
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
10.00 (50)
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
309.58 (44.90)
ÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁ
53.33 (128)
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
1337.35 (193.96)
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
12.77 (55)
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
349.51 (50.69)
ÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁ
54.44 (130)
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
1377.35 (199.76)
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
15.56 (60)
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
392.33 (56.90)
ÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁ
57.22 (135)
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
1480.91 (214.78)
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
18.33 (65)
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
438.18 (63.55)
ÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁ
60.00 (140)
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
1589.57 (230.54)
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
21.11 (70)
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
487.27 (70.67)
ÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁ
62.78 (145)
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
1703.62 (247.08)
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
23.89 (75)
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
539.67 (78.27)
ÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁ
65.56 (150)
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
1823.04 (264.40)
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
26.67 (80)
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
609.38 (88.38)
ÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁ
68.33 (155)
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
1948.04 (282.53)
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
29.44 (85)
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
655.09 (95.01)
ÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁ
71.11 (160)
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
2078.77 (301.49)
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
32.22 (90)
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
718.39 (104.19)
ÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁ
73.89 (165)
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
2215.29 (321.29)
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
35.00 (95)
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
785.61 (113.94)
ÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁ
76.67 (170)
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
2357.81 (341.96)
* All values rounded to two decimal places.
EVAPORATOR RANGE: From –6.67 to 7.22
_
C (20 to 45
_
F), the temperatures represent the gas temperatures inside
the coil and not on the coil surfaces. Add 1.67 to 5.56
_
C (3 to 10
_
F) the temperature for coil and air-off temperatures.
CONDENSER RANGE: From 110 to 160
_
F, temperatures are not ambient. Add 19.4 to 22.2
_
C (35 to 40
_
F) for proper
heat transfer, then refer to the pressure chart.
Example:
32
_
C (90
_
F) ambient temperature
+ 22
_
C (40
_
F)
54
_
C (130
_
F)
Condenser temperature = 1379 kPa (200 psig)
Based on 48.3 km/h (30 mph) air flow.
MANUAL CONTROL HEATING, VENTILATION, AND AIR CONDITIONING SYSTEM 7B – 7
LEAK TESTING THE REFRIGERANT
SYSTEM
Test for leaks whenever you suspect a refrigerant leak in
the system. You should also test for leaks whenever you
perform a service operation which results in disturbing
the lines or the connections. Leaks are commonly found
at the refrigerant fittings or at the connections. Leaks are
commonly caused by the following problems:
D
Improper torque.
D
Damaged O-ring seals.
D
Dirt or lint on the O-ring seals.
Liquid Leak Detectors
Use a liquid leak detector solution on locations such as
fittings. Apply the solution to the area in question with
the swab that is supplied with the solution. Look for
bubbles to appear. This will indicate the existence and
location of any leak.
For areas where this is not practical, such as sections of
the evaporator and the condenser, an electronic leak de-
tector is more useful.
Electronic Leak Detectors
Follow the manufacturer’s instructions for calibration,
operation, and maintenance of an electronic leak detec-
tor. Battery condition is especially important to the accu-
racy of a portable model. Set the detector to R-134a
before beginning the test.
Important: Electronic leak detectors are sensitive to
windshield washing solutions, solvents and cleaners,
and certain vehicle adhesives.
Surfaces must be clean to prevent false readings. Make
sure that all surfaces are dry to prevent damage to the
detector.
General Testing Instructions
D
Follow the entire path of the refrigerant system.
D
Completely circle each joint at 25 to 50 mm (1 to 2
inches) per second.
D
Hold the probe tip within 6 mm (1/4 inch) of the sur-
face.
D
Do not block the air intake.
The audible tone changes from 1 to 2 clicks per second
into a solid alarm if there is a leak. Adjust the balance
control to maintain 1 to 2 clicks per second.
Test all of the following areas, even after one leak has
been confirmed:
D
Evaporator inlet and outlet.
D
Receiver-drier inlet and outlet.
D
Condenser inlet and outlet.
D
Brazed and welded areas.
D
Damaged areas.
D
Hose couplings.
D
Compressor rear head.
D
All fittings and joints.
Testing Service Ports/Access Valves
The sealing cap is the primary seal for the service ports.
This cap contains a special leak-free O-ring. Make sure
that this cap is not missing or loose. Always use the cor-
rect cap.
Testing the Evaporator Core
Leaks in the evaporator core are difficult to find. Test the
evaporator core using the following procedure:
1. Run the blower fan at speed setting 4 for at least
15 minutes.
2. Turn the blower to the OFF position.
3. Wait for 10 minutes.
4. Remove the blower motor resistor. Refer to “Blower
Motor Resistor” in this section.
5. Insert the leak detector probe as close as possible to
the evaporator core. The detector will indicate a leak
with a solid alarm.
6. Use a flashlight to search for refrigerant oil in the core
surface.
Testing the Compressor Shaft Seal
1. Blow shop air behind and in front of the compressor
clutch/pulley for at least 15 seconds.
2. Wait 1 to 2 minutes.
3. Probe the area in front of the pulley. If the detector
emits a solid alarm, there is a leak.
7B – 8 MANUAL CONTROL HEATING, VENTILATION, AND AIR CONDITIONING SYSTEM
AIR CONDITIONING SYSTEM DIAGNOSIS
INSUFFICIENT COOLING DIAGNOSIS
ÁÁÁÁ
ÁÁÁÁ
Step
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Action
ÁÁÁÁÁ
ÁÁÁÁÁ
Value(s)
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
Yes
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
No
1
Can you verify the customer complaint?
–
Go to Step 2
System OK
2
1. Check the fuses Ef14, Ef19, and Ef12.
2. Check the blower fan operation.
3. Check the engine cooling fan operation.
4. Check the A/C compressor belt.
5. Check the A/C condenser for restricted air flow.
6. Check the slippage of the compressor clutch.
7. Repair or replace any components as needed.
8. Check the A/C system operation.
Is the A/C system operation normal?
–
System OK
Go to Step 3
3
1. Turn the ignition switch OFF.
2. Connect the high and the low pressure gauges.
Are both pressures within the value specified?
Low Side
Go to Step 8
Go to Step 6
4
Are both pressures above the specified value?
Pressure:
Go to Step 5
–
5
Are both pressures within the specified value?
200 kPa
(29 Psi)
Go to Step 8
–
6
Are both pressure below the specified value?
(29 Psi)
Go to Step 7
Go to Step 4
7
1. Add the refrigerant R–134a.
2. Check the A/C system for leaks.
3. Repair any refrigerant leaks as needed.
4. Recover, evacuate, and recharge the A/C system.
Are both pressure within the specified value?
High Side
Pressure:
1,500 kPa
(217.5 Psi)
Go to Step 8
–
8
1. Start the engine and allow it to run at idle.
2. Set the A/C controls to following positions.
D
The A/C switch to the ON position.
D
The fresh air control switch to fresh air.
D
The blower motor to 4.
D
The temperature to full cold.
Does the A/C compressor clutch engage?
–
Go to Step 9
Go to Step 11
9
1. Check for a knocking noise from the A/C
compressor.
2. Cycle the A/C compressor ON and OFF in order
to verify the source of the noise.
Do you hear a loud knocking noise?
–
Go to Step 10
Go to Step 14
10
1. Recover the A/C system refrigerant.
2. Replace the A/C compressor.
3. Evacuate and recharge the A/C system.
4. Check the A/C system for leaks.
Is the repair complete?
–
Go to Step 14
–
11
1. Turn the ignition switch OFF.
2. Disconnect the A/C compressor clutch coil
connector.
3. Connect a jumper wire from ground to one A/C
compressor clutch coil terminal.
4. Connect a fused jumper wire from the positive
battery terminal to the other A/C compressor
clutch coil terminal.
Does the A/C clutch engage?
–
Go to Step 12
Go to Step 13
MANUAL CONTROL HEATING, VENTILATION, AND AIR CONDITIONING SYSTEM 7B – 9
Insufficient Cooling Diagnosis (Cont’d)
ÁÁÁÁ
ÁÁÁÁ
Step
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Action
ÁÁÁÁÁ
ÁÁÁÁÁ
Value(s)
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
Yes
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
No
12
Repair the electrical circuit to the A/C compressor
clutch coil.
Does the A/C clutch engage?
–
Go to Step 20
Go to Step 13
13
Replace the A/C compressor clutch coil.
Does the A/C clutch engage?
–
Go to Step 9
Go to Step 10
14
Important: Perform this test under garage condi-
tions; 21-32
_
C (70-90
_
F) and no sun load. Follow
this test carefully for accurate results.
1. Close all of the windows and the doors of the
vehicle.
2. Set the A/C controls to the following positions:
D
The A/C switch to the ON position.
D
The fresh air control switch to fresh air.
D
The blower motor to 4.
D
The temperature to full cold.
3. Start the engine and follow it to run at idle for
5 minutes.
4. Feel the evaporator inlet and outlet pipes.
Is there a noticeable difference in the temperature of
the evaporator inlet and outlet pipes?
–
Go to Step 16
Go to Step 15
15
1. Recover the A/C system refrigerant.
2. Replace the expansion valve as needed.
3. Evacuate and recharge the A/C system.
4. Check the A/C system for leaks.
5. Note the discharge air temperature with the A/C
ON.
Is the discharge temperature normal?
–
Go to Step16
Go to Step 18
16
Feel the liquid pipe between the condenser and the
expansion valve.
Is the pipe cold?
–
Go to Step 19
Go to Step 17
17
1. Remove the restriction of the high pressure side.
2. Check the A/C system for leaks.
Is the repair complete?
–
System OK
–
18
1. Recover the A/C system refrigerant.
2. Evacuate and recharge the A/C system.
3. Check the A/C system for leaks.
Is the repair complete?
–
System OK
–
19
1. Run the engine at 3,000 rpm.
2. Close all of the windows and doors of the vehicle.
3. Set the A/C controls to the following positions:
D
The A/C switch to the ON position.
D
The fresh air control switch to fresh air.
D
The blower motor to 4.
D
The temperature to full cold.
4. Turn the A/C switch ON and OFF every
20 seconds for 3 minutes.
Are the A/C compressor high and the low side
pressures within the specified value of each other?
Low Side
Pressure:
200 kPa
(29 psi)
High Side
Pressure:
1,500 kPa
(217.5 psi)
System OK
Go to Step 22
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