Suzuki Wagon R Manual page 69

1B-10 AIR CONDITIONING (OPTIONAL)
DETAIL DIAGNOSIS TABLE AT AMBIENT TEMPERATURE WITHIN 30 – 35_C (85 – 95_F)
MPa
MANIFOLD
kg / cm
GAUGE
psi
Lo Hi
0.23 – 0.35 1.4 – 1.75
2.3 – 3.5 14 – 17.5
33 – 50 200 – 249
0.5 – 0.6
Negative
5 – 6
pressure
71.2 – 85.3
Normal: Normal:
0.23 – 0.35 1.4 – 1.75
2.3 – 3.5 14 – 17.5
33 – 50 200 – 249
Abnormal: Abnormal:
Negative 0.69 – 0.98
pressure 7 – 10
100 – 142
0.05 – 0.15
0.5 – 1.5
4.2 – 21.3
0.69 – 0.98
7 – 10
100 – 142
0.4 – 0.6
4 – 6
56.9 – 85.3
0 35 0.35 – 0.45 0 5
3.5 – 4.5
50 – 64
1.96 – 2.45
20 – 25
285 – 355
0.45 – 0.55
4.5 – 5.5
64 – 78
2
CONDITION
Normal condition.
D The low pressure side
reads a negative
pressure,and the high
pressure side reads an
extremely low pressure.
D Presence of frost around
tubing to and from
receiver / dryer and
expansion valve.
D During A / C operation,
the low pressure side
sometimes indicates
negative pressure, and
sometimes normal pres-
sure. Also high pressure
side reading fluctuates
between the abnormal
and normal pressure.
D Both low and high
pressure sides indicate
low readings.
D Continuous air bubbles
are visible through sight
glass.
D Output air is slightly cold.
D Pressure on low
pressure side is high.
D Pressure on high pressure
side is low.
D Both pressure becoming
equal right after A / C is
turned OFF.
D High pressure reading
on both low and high
pressure sides.
D Air bubbles are not
visible even when
engine rpm is lowered.
D High pressure reading
on both low and high
pressure sides.
D Low pressure side tubing
is not cold when touched.
D Air bubbles are visible
through sight glass.
D High pressure reading
on both low and high
pressure sides.
D Large amount of frost or
dew on the low pressure
side tubing.
CAUSE
–––––––––
D Dust particles or
water droplets are
either stuck or frozen
inside expansion
valve, preventing the
refrigerant from
flowing.
D Expansion valve is
frozen due to
moisture in the
system, and
temporarily shuts off
the refrigeration
cycle.
D Insufficient
refrigerant in system.
(Refrigerant leaking)
D Internal leak in
compressor.
D Overcharged A / C
system.
D Faulty condenser
cooling operation.
D Faulty condenser fan
operation.
D Presence of air in
A/ C system.
(Improperly evacuated)
D Faulty expansion
valve.
D Refrigerant flow is not
regulated properly.
CORRECTION
–––––––––
D Clean expansion valve.
Replace it if it cannot be
cleaned.
D Replace receiver / dryer.
D Evacuate the A / C
system and recharge
with fresh refrigerant.
D Replace expansion
valve.
D Replace receiver / dryer.
D Evacuate A / C system
and recharge with fresh
refrigerant.
D Using a gas leak
detector, check for leaks
and repair as necessary.
D Recharge refrigerant to
a specified amount.
If the pressure reading is
almost 0 when the
manifold gauges are at-
tached, check for any
leaks, repair them, and
evacuate the system.
D Inspect compressor
and repair or replace
as necessary.
D Adjust refrigerant to
specified amount.
D Clean condenser.
D Inspect and repair
condenser fan.
D Replace receiver / dryer.
D Inspect quantity of com-
pressor oil and presence
of contaminants in oil.
D Evacuate system and
recharge with fresh
refrigerant.
D Replace expansion
valve.