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1B-14 AIR CONDITIONING (OPTIONAL)
MPa
MANIFOLD
(kg/cm
GAUGE
(psi)
Lo
0.35 – 0.45
2.0 – 2.5
(3.5 – 4.5)
(20 – 25)
(50 – 64)
(285 – 355)
0.45 – 0.55
(4.5 – 5.5)
(64 – 78)
Condition
2
)
Detail
Hi
High pressure reading on
both low and high pressure
sides.
Air bubbles are not visible
even when engine rpm is
lowered.
High pressure reading on
both low and high pressure
sides.
Low pressure side tubing is
not cold when touched.
Air bubbles are visible
through sight glass.
High pressure reading on
both low and high pressure
sides.
Large amount of frost or
dew on the low pressure
side tubing.
Possible Cause
Overcharged A/C system
Faulty condenser cooling
operation
Faulty radiator/condenser
cooling fan operation
Presence of air in A/C system
(Improperly evacuated)
Faulty expansion valve
Refrigerant flow is not regu-
lated properly
Correction
Adjust refrigerant to specified
amount.
Clean condenser.
Inspect and repair radiator/
condenser cooling fan.
Replace receiver/dryer.
Inspect quantity of compres-
sor oil and presence of con-
taminants in oil.
Evacuate system and
recharge with fresh refriger-
ant.
Replace expansion valve.
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