Detail Diagnosis Table (Ambient Temperature At 30°C (86°F)) - Suzuki Ignis Service Manual

DETAIL DIAGNOSIS TABLE (AMBIENT TEMPERATURE AT 30°C (86°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)
Negative 0.5 – 0.6
pressure (5 – 6)
(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 0.7 – 1.0
pressure (7 – 10)
(100 – 142)
0.05 – 0.15 0.7 – 1.0
(0.5 – 1.5) (7 – 10)
(4.2 – 21.3) (100 – 142)
0.4 – 0.6
(4 – 6)
(56.9 – 85.3)
Condition
2
)
Detail
Normal condition
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.
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.
Both low and high pressure
sides indicate low readings.
Continuous air bubbles are
visible through sight glass.
Output air is slightly cold.
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.
AIR CONDITIONING (OPTIONAL) 1B-13
Possible Cause
–
Dust particles or water drop-
lets are either stuck or frozen
inside expansion valve, pre-
venting the refrigerant from
flowing
Expansion valve is frozen due
to moisture in the system, and
temporarily shuts off the
refrigeration cycle
Insufficient refrigerant in sys-
tem
(Refrigerant leaking)
Internal leak in compressor
Correction
–
Clean expansion valve.
Replace it if it cannot be
cleaned.
Replace receiver/dryer.
Evacuate the A/C system and
recharge with fresh refriger-
ant.
Replace expansion valve.
Replace receiver/dryer.
Evacuate A/C system and
recharge with fresh refriger-
ant.
Using leak detector, check for
leaks and repair as neces-
sary.
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.
Inspect compressor and
repair or replace as neces-
sary.