Honda ACCORD HYBRID 2005 Service Manual page 1679

D9
Pressure Test
Test results
Related symptoms Probable cause
Remedy
Discharge
(high)
After stopping A/C compressor,
pressure drops about 196 kPa
Air in system Recover, evacuate (see page
21-104), and recharge w i t h
pressure
a b n o r m a l l y
(2.0 kgf/cm 2 , 28 psi) quickly, and
then falls gradually.
specified a m o u n t (see page
21-105).
high Reduced or no a i r f l o w t h r o u g h • Clogged A/C condenser • Clean.
A/C condenser. or radiator fins
• A/C condenser or
radiator fan not
w o r k i n g properly
• Check voltage and fan r p m .
• Check fan direction.
Line to A/C condenser is Restricted f l o w of Restricted lines.
excessively hot. refrigerant in system
Discharge High and low-pressures are • Faulty A/C compressor Replace the A/C compressor.
pressure balanced soon after stopping A/C discharge valve
a b n o r m a l l y compressor. Low side is higher • Faulty A/C compressor
low than normal. seal
Outlet of expansion valve is not • Faulty expansion valve • Replace.
frosted, low-pressure gauge • Moisture in system • Recover, evacuate, and
indicates v a c u u m .
recharge w i t h specified a m o u n t .
Suction Expansion valve is not frosted, • Frozen expansion valve • Recover, evacuate, and
(low) and low-pressure line is not cold. (Moisture in system) recharge w i t h specified a m o u n t .
pressure Low-pressure gauge indicates • Faulty expansion valve • Replace the expansion valve.
a b n o r m a l l y v a c u u m .
l o w
Discharge temperature is low, and
the airflow f r o m vents is restricted.
Frozen evaporator Run the fan w i t h A/C compressor
off, then check evaporator
temperature sensor.
Expansion valve is frosted. Clogged expansion valve Clean or replace.
Suction Low-pressure hose and check Expansion valve open too Repair or replace.
pressure joint are cooler than the long
abnormally temperature around evaporator.
high Suction pressure is lowered w h e n Excessive refrigerant in Recover, evacuate, and recharge
A/C condenser is cooled by water. system w i t h specified amount.
High and low-pressures are • Faulty gasket Replace the A/C compressor.
equalized as soon as the A/C • Faulty high-pressure
compressor is stopped, and both valve
gauges fluctuate w h i l e running. • Foreign particle stuck
in high-pressure valve
Suction and Reduced airflow t h r o u g h A/C
• Clogged A/C condenser
• Clean.
discharge condenser. or radiator fins • Check voltage and fan r p m .
pressures • A/C condenser or • Check fan direction.
a b n o r m a l l y
radiator fan not
high w o r k i n g properly
Suction and Low-pressure hose and metal end Clogged or kinked low- Repair or replace.
discharge areas are cooler than evaporator. pressure hose parts
pressures
a b n o r m a l l y
Temperature around expansion
valve is too low c o m p a r e d w i t h
Clogged high-pressure
line
Repair or replace.
low that around receiver/dryer.
Refrigerant A/C compressor clutch is dirty. A/C compressor shaft Replace the A/C compressor.
leaks seal leaking
A/C compressor bolt(s) are dirty. Leaking around bolt(s)
Tighten bolt(s) or replace A/C
compressor.
A/C compressor gasket is w e t w i t h
oil.
Gasket leaking Replace the A/C compressor.
21-109