Suzuki Canvas SQ416, Руководство по обслуживанию

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J2
ESCUDO
AIR CONDITIONING (OPTIONAL) 1B-11
MPa
MANIFOLD GAUGE kg/cm
2
psi
CONDITION CAUSE CORRECTION
Lo Hi
0.15 – 0.25
1.5 – 2.5
21.3 – 35.5
1.37 – 1.57
14 – 16
200 – 227
Normal condition.
Negative
pressure
0.5 – 0.6
5 – 6
71.2 – 85.3
The low pressure side reads
a negative pressure, and
the high pressure side
reads an extremely low
pressure.
Presence of frost around
tubing to and from receiver/
dryer and expansion valve.
Dust particles or water
droplets are either stuck
or frozen inside expan-
sion valve, preventing
the refrigerant from flow-
ing.
Gas leak from heat-sen-
sitizing tube is prevent-
ing refrigerant flow.
Clean expansion valve.
Replace it if it cannot be
cleaned.
Replace receiver/dryer or
desiccant.
Evacuate the A/C system
and recharge with fresh re-
frigerant.
If heat-sensitizing tube is
defective, replace expan-
sion valve.
Normal:
0.15 – 0.25
1.5 – 2.5
21.4 – 35.5
Abnormal:
Negative
pressure
Normal:
1.37 – 1.57
14 – 16
200 – 227
Abnormal:
0.69 – 0.98
7 – 10
100 – 142
During A/C operation, the
low pressure side some-
times indicates negative
pressure, and sometimes
normal pressure. Also high
pressure side reading fluc-
tuates between the abnor-
mal and normal pressure. Expansion valve is fro-
zen due to moisture in
the system, and tempo-
rarily shuts off the refrig-
eration cycle. Replace expansion valve.
Replace receiver/dryer or
desiccant.
Evacuate A/C system and
recharge with fresh refriger-
ant.
0.05 – 0.1
0.5 – 1.0
4.2 – 14.2
0.69 – 0.98
7 – 10
100 – 142
Both low and high pressure
sides indicate low readings.
Continuous air bubbles are
visible through sight glass.
Output air is slightly cold.
Insufficient refrigerant in
system.
(Refrigerant leaking)
Using a gas leak detector,
check for leaks and repair
as necessary.
Recharge refrigerant to a
specified amount.
If the pressure reading is
almost 0 when the manifold
gauges are attached, check
for any leaks, repair them,
and evacuate the system.
0.4 – 0.6
4 – 6
56.9 – 85.3
100 142
Pressure on low pressure
side is high.
Pressure on high pressure
side is low.
Both pressure becoming
equal right after A/C is
turned OFF.
Internal leak in compres-
sor. Inspect compressor and re-
pair or replace as neces-
sary.
0.25 – 0.3
2 5 3 0
High pressure reading on
both low and high pressure
sides.
Air bubbles are not visible
even when engine rpm is
lowered.
Overcharged A/C sys-
tem.
Faulty condenser cool-
ing operation.
Faulty condenser fan
operation.
Adjust refrigerant to speci-
fied amount.
Clean condenser.
Inspect and repair con-
denser fan.
2.5 – 3.0
35.6 – 42.6
1.96 – 2.45
20 – 25
285 – 355
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.
Presence of air in A/C
system.
(Improperly evacuated)
Replace receiver/dryer or
desiccant.
Inspect quantity of com-
pressor oil and presence of
contaminants in oil.
Evacuate system and re-
charge with fresh refriger-
ant.
0.3 – 0.4
3.0 – 4.0
42.7 – 56.8
High pressure reading on
both low and high pressure
sides.
Large amount of frost or
dew on the low pressure
side tubing.
Faulty expansion valve
or improper attachment
of heat-sensitizing tube.
Refrigerant flow is not
regulated properly.
Inspect if heat-sensitizing
tube is properly attached.
Replace expansion valve.