Acura Integra 1998 Service Manual page 1041

J
Pressure Test Chart
Performance Test on page 22.24.
TEST RESULTS
RELATED SYMPTOMS
PROBABLE CAUSE REMEDY
Discharge (highl
pressure
abnormally high
After stopping compressor, pressure
drops about 200 kPa (2.0 kgflcm',28
psi) quickly, and then falls gradually.
Air in system Recover, evacuate and recharge
with specified amount.
Evacuation: see pag€ 22-38
Charging: see page 22-39
Reduced or no air tlow through
conoenser.
. Clogged condenser or
radiator fins
. Condenser or radialor fan
not working proPerly
Clean
Check voltage and fan rpm
Check fan direction
Line lo condenser is excessively hot.
Restricted flow of felrigerant
in system
Restricted lines
Discharge
pressure
abnormally low
High and low pressures are balanced
soon after stopping compressor. Low
side is higherthan normal.
. Faulty compressor
discharge valve
. Faulty compressor seal
Replace the compressor.
Outlet of expansion valve is not
frosted, low pressure gauge
indicates vacuum.
. Faulty expansion valve
. lvloisture in system
. Replace
. Recover, evacuate and recharge
with specified amount.
Suction (low)
pressure
abnormally low
Expansion valve is not frosted and
low-pressure line is not cold. Low
pressure gauge indicates vacuum.
Frozen expansion valve
Faulty expansion valve
Replace the expansion valve.
Discharge temperature is low and the
airflow from vents is restricted.
Frozen evaporator
Run the fan with compressor off,
then check A,/C thermostat.
Expansion valve is frosted.
Clogged expansion valve
Clean or replace.
Receiver/dryer outlet is cool and inlet
is warm (should be warm during
operal|onJ.
Clogged receiver/dryer
Replace
Suction
pressure
abnormally high
Low-pressure hose and seryice
valve are cooler than the temPera-
ture around evaporator.
Expansion valve open too
long
Loose expansion capillary
tube
Repair or replace.
Suction pressure is lowered when
condenser is cooled by water.
Excessive refrigerant in
system
Recover. evacuate and recharge
with specified amount.
High and low pressure are equalized
as soon asthe compressor as
stopped, and both gauges fluctuate
while running.
Faulty gasket
Faulty high-pressure valve
Foreign panicle stuck in high
pressure valve
Reolace the comDressor.
Suction and dis-
charge pr€ssures
abnormally high
Reduced air flow through
condenser.
. Clogged condenser or
radiator fins
. Condenser or radiator lan
not working properly.
Clean condenser and radiator
Check voltage and fan rpm
Check fan direction
No bubbles in sight glass when
condenser is cooled bv water.
Excessive refrigerant in system Recover. evacuate and recharge
with specified amount.
Suction and
discharge
pfessure
abnormally low
Low-pressure hose and metal end
areas are cooler than evaDorator.
Clogged or kinked low
pressure hose parts
Repair or replace.
TemP€rature around expansion
valve is too low compared with that
around receiv€r/dryer.
Clogged high-pressure line
Repair or replace.
Retrigerant
leaks
Compressor clutch is dirty. Compressor shaft seal leaking
Replace the compressor.
Comoressor bolt(s) are dirty.
Leaking around bolt(s)
Tighten bolt{s) or replace
compressor.
Compressor gasket is wet with oil. Gasket leaking
Reolace the comoressor.
22-23