Mitsubishi Outlander XL. Manual — part 1203

REFRIGERANT LEVEL CHECK, DRAING, AND CHARGING

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REFRIGERANT LEVEL TEST

Use the refrigerant recovery station to remove all of the
refrigerant, and then calculate the amount of the refrigerant and
charge it.

NOTE:

Refer to the Refrigerant Recovery and Recycling

Unit’s Instruction Manual for operation of the unit.

METHOD BY USING REFRIGERANT RECOVERY

AND RECYCLING UNIT

Using the refrigerant recovery and recycling unit, refill the
refrigerant.

NOTE:

Refer to the Refrigerant Recovery and Recycling

Unit’s Instruction Manual for operation of the unit.

DISCHARGING SYSTEM

Use the refrigerant recovery unit to discharge refrigerant gas
from the system.

NOTE:

Refer to the Refrigerant Recovery and Recycling

Unit’s Instruction Manual for operation of the unit.

CHARGING

Use the refrigerant recovery station to charge the refrigerant.

NOTE:

Refer to the Refrigerant Recovery and Recycling

Unit’s Instruction Manual for operation of the unit.

REFILLING OF OIL IN THE A/C SYSTEM

Too little oil will provide inadequate compressor lubrication and
cause a compressor failure. Too much oil will increase discharge
air temperature.
When a compressor is installed at the factory, it contains 80
cm3(4.7 fl.oz) of refrigerant oil. While the A/C system is in
operation, the oil is carried through the entire system by the
refrigerant. Some of this oil will be trapped and retained in
various parts of the system.
When the following system components are changed, it is
necessary to add oil to the system to replace the oil being
removed with the component.

Compressor oil: SUN PAG 56

Quantity:

Evaporator: 60 cm3(2.0 fl.oz)
Condenser: 15 cm3(0.5 fl.oz)

AIR CONDITIONING

55A-103

ON-VEHICLE SERVICE

Suction hose: 10 cm3(0.3 fl.oz)

PERFORMANCE TEST

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The vehicles to be tested should be parked out of direct sunlight.

ZC602549

Low-pressure
valve

High-pressure
valve

Gauge manifold

Charging
hose (Red)

A

Sleeve

Charging
hose (Blue)

Adaptor
valve
(For low-pres-
sure)

Adaptor
valve
(For high-
pressure)

Low-
pressure
service
valve

High-
pressure
service
valve

0000

1.

Close the high and low-pressure valve of the gauge manifold.

2.

Connect the charging hose (blue) to the low-pressure valve
and connect the charging hose (red) to the high-pressure
valve of the gauge manifold.

3.

Install the quick joint (for low-pressure) to the charging hose
(blue), and connect the quick joint (for high-pressure) to the
charging hose (red).

｠

To connect the quick joint, press section A firmly against
the service valve until a click is heard.

｠

When connecting, run your hand along the hose while
pressing to ensure that there are no bends in the hose.

4.

Connect the quick joint (for low-pressure) to the low-pressure
service valve and connect the quick joint (for high-pressure)
to the high-pressure service valve.

NOTE:

The high-pressure service valve is on the A/C pipe

and the low-pressure service valve is on the suction hose.

5.

Start the engine.

6.

Set the A/C controls as follows:

｠

A/C switch: A/C - ON position

｠

Mode selection: FACE position

｠

Temperature control: MAXIMUM COOLING position

｠

Air selection: RECIRCULATION position

｠

Blower switch: Maximum air volume

7.

Adjust engine speed to idle speed with A/C clutch engaged.

8.

Engine should be warmed up with doors and windows opened.

ZC603577

Thermometer

9.

Insert a thermometer in the center air outlet and operate the
engine for 20 minutes.

NOTE:

If the A/C clutch cycles, take the reading before

the clutch disengages.

10.

Note the discharge air temperature.

PERFORMANCE TEMPERATURE CHART

Garage ambient air temperature °C (°F)

20 (68)

25 (77)

30 (86)

35 (95)

Discharge air temperature °C (°F)

3.5 (38.3) -
13.2 (55.7)

8.5 (47.3) -
20.3 (68.0)

13.4 (56.1) -
23.1 (73.6)

18.4 (65.1) -
34.4 (93.9)

Compressor high pressure kPa (psi)

972 (141) -
1205 (175)

1123 (163) -
1390 (202)

1275 (185) -
1574 (228)

1426 (207) -
1759 (255)

55A-104

AIR CONDITIONING

ON-VEHICLE SERVICE

Garage ambient air temperature °C (°F)

20 (68)

25 (77)

30 (86)

35 (95)

Compressor low pressure kPa (psi)

176 (25.5) -
301 (43.7)

211 (30.6) -
335 (48.6)

245 (35.5) -
370 (53.7)

280 (40.6) -
404 (58.6)

REFRIGERANT LEAK REPAIR PROCEDURE

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LOST CHARGE

If the system has lost all charge due to a leak:

1.

Evacuate the system. (Refer to P.55A-103).

2.

Charge the system with approximately 0.453 kg (1
pound) of refrigerant.

3.

Check for leaks.

4.

Discharge the system.

5.

Repair leaks.

Replacement filter-drier units must be sealed
while in storage. The drier used in these units will
saturate water quickly upon exposure to the
atmosphere. When installing a drier, have all tools
and supplies ready for quick assembly to avoid
keeping the system open any longer than
necessary.

6.

Replace receiver drier.

7.

Evacuate and charge system.

LOW CHARGE

If the system has not lost all of its refrigerant charge;
locate and repair all leaks. If it is necessary to increase
the system pressure to find the leak (because of an
especially low charge) add refrigerant. If it is possible
to repair the leak without discharging the refrigerant
system, use the procedure for correcting low
refrigerant level.

HANDLING TUBING AND FITTINGS

Kinks in the refrigerant tubing or sharp bends in the
refrigerant hose lines will greatly reduce the capacity
of the entire system. High pressures are produced in
the system when it is operating. Extreme care must
be exercised to make sure that all connections are
pressure tight. Dirt and moisture can enter the system
when it is opened for repair or replacement of lines or
components. The following precautions must be
observed. The system must be completely discharged
before opening any fitting of connection in the
refrigeration system. Open fittings with caution even
after the system has been discharged. If any pressure
is noticed as a fitting is loosened, allow trapped
pressure to bleed off very slowly.
Never attempt to rebend formed lines to fit. Use the
correct line for the installation you are servicing. A
good rule for the flexible hose lines is keep the radius
of all bends at least 10 times the diameter of the hose.
Sharper bends will reduce the flow of refrigerant. The
flexible hose lines should be routed so that they are
at least 80 mm (3.1 inches) from the exhaust manifold.
It is good practice to inspect all flexible hose lines at
least once a year to make sure they are in good
condition and properly routed.
On standard plumbing fittings with O-rings, these O-
rings are not reusable.

COMPRESSOR NOISE CHECK

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You must first know the conditions when the noise
occurs. These conditions are: weather, vehicle speed,
in gear or neutral, engine temperature or any other
special conditions.
Noises that develop during A/C operation can often be
misleading. For example: what sounds like a failed
front bearing or connecting rod, may be caused by
loose bolts, nuts, mounting brackets, or a loose clutch
assembly. Verify accessory drive belt tension (power
steering or generator).
Improper accessory drive belt tension can cause a
misleading noise when the compressor is engaged
and little or no noise when the compressor is
disengaged.

Drive belts are speed-sensitive. That is, at different
engine speeds, and depending upon belt tension,
belts can develop unusual noises that are often
mistaken for mechanical problems within the
compressor.

ADJUSTMENT

1.

Select a quiet area for testing. Duplicate conditions
as much as possible. Switch the compressor on and
off several times to clearly identify compressor
noise. To duplicate high ambient conditions (high
head pressure), restrict air flow through the
condenser. Install a manifold gauge set to make
sure discharge pressure doesn't exceed 2,070 kPa
(300.2 psi).

AIR CONDITIONING

55A-105

ON-VEHICLE SERVICE

2.

Tighten all compressor mounting bolts, clutch
mounting bolt, and compressor drive belt. Check to
assure clutch coil is tight (no rotation or wobble).

3.

Check refrigerant hoses for rubbing or interference
that can cause unusual noises.

4.

Check refrigerant charge. (Refer to P.55A-105).

5.

Recheck compressor noise as in Step 1.

6.

If noise still exists, loosen compressor mounting
bolts and retighten. Repeat Step 1.

7.

If noise continues, replace compressor and repeat
from Step 1.

POWER RELAY CHECK

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BLOWER RELAY CONTINUITY CHECK

ZC603579

4

1

2

3

3

1

4

2

Blower relay

Battery voltage

Tester connection Specified

condition

Not applied

3 - 4

Open circuit

｠

Connect terminal
1 to the positive
battery terminal

｠

Connect terminal
2 to the negative
battery terminal

3 - 4

Less than 2 ohms

55A-106

AIR CONDITIONING

ON-VEHICLE SERVICE