Suzuki SQ416 Service Manual page 85
Volume 1 of 2 chassis/electrical/body
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Also See for SQ416:
- Service manual (118 pages) ,
- Owner's manual (266 pages) ,
- Service manual (133 pages)
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MPa
MANIFOLD GAUGE kg/cm
psi
Lo
Hi
0.15 – 0.25
1.37 – 1.57
1.5 – 2.5
14 – 16
21.3 – 35.5
200 – 227
0.5 – 0.6
Negative
5 – 6
pressure
71.2 – 85.3
Normal:
Normal:
0.15 – 0.25
1.37 – 1.57
1.5 – 2.5
14 – 16
21.4 – 35.5
200 – 227
µ
µ
Abnormal:
Abnormal:
Negative
0.69 – 0.98
pressure
7 – 10
100 – 142
0.05 – 0.1
0.5 – 1.0
4.2 – 14.2
0.69 – 0.98
7 – 10
100
100 – 142
142
0.4 – 0.6
4 – 6
56.9 – 85.3
0.25 – 0.3
2.5 – 3.0
2 5
3 0
35.6 – 42.6
1.96 – 2.45
20 – 25
285 – 355
0.3 – 0.4
3.0 – 4.0
42.7 – 56.8
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 some-
times indicates negative
pressure, and sometimes
normal pressure. Also high
pressure side reading fluc-
tuates between the abnor-
mal 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.
AIR CONDITIONING (OPTIONAL) 1B-11
CAUSE
D Dust particles or water
droplets are either stuck
or frozen inside expan-
sion valve, preventing
the refrigerant from flow-
ing.
D Gas leak from heat-sen-
sitizing tube is prevent-
ing refrigerant flow.
D Expansion valve is fro-
zen due to moisture in
the system, and tempo-
rarily shuts off the refrig-
eration cycle.
D Insufficient refrigerant in
system.
(Refrigerant leaking)
D Internal leak in compres-
sor.
D Overcharged A/C sys-
tem.
D Faulty condenser cool-
ing operation.
D Faulty condenser fan
operation.
D Presence of air in A/C
system.
(Improperly evacuated)
D Faulty expansion valve
or improper attachment
of heat-sensitizing tube.
D Refrigerant flow is not
regulated properly.
CORRECTION
D Clean expansion valve.
Replace it if it cannot be
cleaned.
D Replace receiver/dryer or
desiccant.
D Evacuate the A/C system
and recharge with fresh re-
frigerant.
D If heat-sensitizing tube is
defective, replace expan-
sion valve.
D Replace expansion valve.
D Replace receiver/dryer or
desiccant.
D Evacuate A/C system and
recharge with fresh refriger-
ant.
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 attached, check
for any leaks, repair them,
and evacuate the system.
D Inspect compressor and re-
pair or replace as neces-
sary.
D Adjust refrigerant to speci-
fied amount.
D Clean condenser.
D Inspect and repair con-
denser fan.
D Replace receiver/dryer or
desiccant.
D Inspect quantity of com-
pressor oil and presence of
contaminants in oil.
D Evacuate system and re-
charge with fresh refriger-
ant.
D Inspect if heat-sensitizing
tube is properly attached.
D Replace expansion valve.
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