Infiniti I30 (A33). Manual - part 532
Both High- and Low-pressure Sides are Too Low.
NHHA0208S04
Gauge indication
Refrigerant cycle
Probable cause
Corrective action
Both high- and low-pressure sides
are too low.
AC353A
I
There is a big temperature
difference between
receiver drier outlet and
inlet. Outlet temperature is
extremely low.
I
Liquid tank inlet and
expansion valve are
frosted.
Compressor discharge
capacity does not change.
(Compressor stroke is set at
maximum.)
I
Replace liquid tank.
I
Check lubricant for con-
tamination.
I
Temperature of expansion
valve inlet is extremely low
as compared with areas
near liquid tank.
I
Expansion valve inlet may
be frosted.
I
Temperature difference
occurs somewhere in high-
pressure side
High-pressure pipe located
between receiver drier and
expansion valve is clogged.
I
Check and repair malfunc-
tioning parts.
I
Check lubricant for con-
tamination.
I
Expansion valve and liquid
tank are warm or only cool
when touched.
Low refrigerant charge
"
Leaking fittings or compo-
nents
Check refrigerant for leaks.
Refer to “Checking Refriger-
ant Leaks”, HA-119.
There is a big temperature
difference between expan-
sion valve inlet and outlet
while the valve itself is
frosted.
Expansion valve closes a
little compared with the
specification.
"
1. Improper expansion valve
adjustment
2. Malfunctioning thermal
valve
3. Outlet and inlet may be
clogged.
I
Remove foreign particles
by using compressed air.
I
Check lubricant for con-
tamination.
An area of the low-pressure
pipe is colder than areas
near the evaporator outlet.
Low-pressure pipe is clogged
or crushed.
I
Check and repair malfunc-
tioning parts.
I
Check lubricant for con-
tamination.
Air flow volume is not
enough or is too low.
Evaporator is frozen.
"
Compressor discharge
capacity does not change.
(Compressor stroke is set at
maximum length.)
Replace compressor.
GI
MA
EM
LC
EC
FE
AT
AX
SU
BR
ST
RS
BT
SC
EL
IDX
TROUBLE DIAGNOSES
Insufficient Cooling (Cont’d)
HA-87