Infiniti I30 (A33). Manual — part 531
SHA329F
*1: HA-112
*2: HA-66
*3: MA-13
GI
MA
EM
LC
EC
FE
AT
AX
SU
BR
ST
RS
BT
SC
EL
IDX
TROUBLE DIAGNOSES
Insufficient Cooling (Cont’d)
HA-83
PERFORMANCE TEST
NHHA0207
Test Condition
NHHA0207S01
Testing must be performed as follows:
Vehicle location
Indoors or in the shade (in a well-ventilated place)
Doors
Closed
Door windows
Open
Hood
Open
TEMP.
Max. COLD
Mode switch
(Ventilation) set
REC switch
(Recirculation) set
(blower) speed
Max. speed set
Engine speed
Idle speed
Operate the air conditioning system for 10 minutes before taking measurements.
Test Reading
NHHA0207S02
Recirculating-to-discharge Air Temperature Table
NHHA0207S0201
Inside air (Recirculating air) at blower assembly inlet
Discharge air temperature at center ventilator
°C (°F)
Relative humidity
%
Air temperature
°C (°F)
50 - 60
15 (59)
3.5 - 5.4 (38 - 42)
20 (68)
6.6 - 8.9 (44 - 48)
25 (77)
9.5 - 12.6 (49 - 55)
30 (86)
13.4 - 16.5 (56 - 62)
35 (95)
17.6 - 21.3 (64 - 70)
60 - 70
15 (59)
5.4 - 7.1 (42 - 45)
20 (68)
8.9 - 11.0 (48 - 52)
25 (77)
12.6 - 15.4 (55 - 60)
30 (86)
16.5 - 20.0 (62 - 68)
35 (95)
21.3 - 24.8 (70 - 77)
Ambient Air Temperature-to-operating Pressure Table
NHHA0207S0202
Ambient air
High-pressure (Discharge side)
kPa (kg/cm
2
, psi)
Low-pressure (Suction side)
kPa (kg/cm
2
, psi)
Relative humidity
%
Air temperature
°C (°F)
50 - 70
15 (59)
539 - 657
(5.5 - 6.7, 78 - 95)
177 - 216
(1.8 - 2.2, 26 - 31)
20 (68)
677 - 824
(6.9 - 8.4, 98 - 119)
167 - 206
(1.7 - 2.1, 24 - 30)
25 (77)
843 - 1,030
(8.6 - 10.5, 122 - 149)
177 - 226
(1.8 - 2.3, 26 - 33)
30 (86)
1,030 - 1,275
(10.5 - 13.0, 149 - 185)
216 - 255
(2.2 - 2.6, 31 - 37)
35 (95)
1,245 - 1,520
(12.7 - 15.5, 181 - 220)
265 - 324
(2.7 - 3.3, 38 - 47)
TROUBLE DIAGNOSES
Insufficient Cooling (Cont’d)
HA-84
TROUBLE DIAGNOSES FOR ABNORMAL PRESSURE
NHHA0208
Whenever system’s high and/or low side pressure is abnormal, diagnose using a manifold gauge. The marker
above the gauge scale in the following tables indicates the standard (normal) pressure range. Since the stan-
dard (normal) pressure, however, differs from vehicle to vehicle, refer to HA-84 (“Ambient air temperature-to-
operating pressure table”).
Both High and Low-pressure Sides are Too High.
NHHA0208S01
Gauge indication
Refrigerant cycle
Probable cause
Corrective action
Both high and low-pressure sides
are too high.
AC359A
I
Pressure is reduced soon
after water is splashed on
condenser.
Excessive refrigerant charge
in refrigeration cycle
Reduce refrigerant until
specified pressure is
obtained.
Air suction by cooling fan is
insufficient.
Insufficient condenser cool-
ing performance
"
1. Condenser fins are
clogged.
2. Improper fan rotation of
cooling fan
I
Clean condenser.
I
Check and repair cooling
fan as necessary.
I
Low-pressure pipe is not
cold.
I
When compressor is
stopped high-pressure
value quickly drops by
approximately 196 kPa (2
kg/cm
2
, 28 psi). It then
decreases gradually there-
after.
Poor heat exchange in con-
denser
(After compressor operation
stops, high pressure
decreases too slowly.)
"
Air in refrigeration cycle
Evacuate repeatedly and
recharge system.
Engine tends to overheat.
Engine cooling systems mal-
function.
Check and repair each
engine cooling system.
I
An area of the low-pres-
sure pipe is colder than
areas near the evaporator
outlet.
I
Plates are sometimes cov-
ered with frost.
I
Excessive liquid refrigerant
on low-pressure side
I
Excessive refrigerant dis-
charge flow
I
Expansion valve is open a
little compared with the
specification.
"
1. Improper thermal valve
installation
2. Improper expansion valve
adjustment
Replace expansion valve.
GI
MA
EM
LC
EC
FE
AT
AX
SU
BR
ST
RS
BT
SC
EL
IDX
TROUBLE DIAGNOSES
Insufficient Cooling (Cont’d)
HA-85
High-pressure Side is Too High and Low-pressure Side is Too Low.
NHHA0208S02
Gauge indication
Refrigerant cycle
Probable cause
Corrective action
High-pressure side is too high and
low-pressure side is too low.
AC360A
Upper side of condenser and
high-pressure side are hot,
however, liquid tank is not so
hot.
High-pressure tube or parts
located between compressor
and condenser are clogged
or crushed.
I
Check and repair or
replace malfunctioning
parts.
I
Check lubricant for con-
tamination.
High-pressure Side is Too Low and Low-pressure Side is Too High.
NHHA0208S03
Gauge indication
Refrigerant cycle
Probable cause
Corrective action
High-pressure side is too low and
low-pressure side is too high.
AC356A
High and low-pressure sides
become equal soon after
compressor operation stops.
Compressor pressure opera-
tion is improper.
"
Damaged inside compressor
packings
Replace compressor.
No temperature difference
between high and low-pres-
sure sides
Compressor pressure opera-
tion is improper.
"
Damaged inside compressor
packings.
Replace compressor.
TROUBLE DIAGNOSES
Insufficient Cooling (Cont’d)
HA-86
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст