Mazda RX-8 Manual page 1709

CHECK TO SEE WHETHER
MALFUNCTION IS IN EXPANSION VALVE
OR RECEIVER/DRIER
Turn A/C switch off and let air conditioner
•
stop for 10 min .
Start engine.
•
Turn both A/C switch and fan switch on.
•
Does malfunction occur after A/C
•
compressor turns on?
VERIFY THAT EXPANSION VALVE
HEAT-SENSING TUBE WITHIN A/C UNIT
IS POSITIONED SECURELY AND
CORRECTLY
9
Is expansion valve heat-sensing tube
•
within A/C unit securely installed in proper
position?
INSPECT REFRIGERANT LINES
Inspect refrigerant lines.
•
Is piping free of damage and
cracks?
Are piping connections free of oil
grime? (Visual inspection)
Are piping connections free of gas
leakage?
Are piping installation points on
condenser free of gas leakage?
10
Are piping installation points on
receiver/drier free of gas leakage?
Are piping installation points on
A/C compressor free of gas
leakage?
Are piping installation points on
A/C unit free of gas leakage?
Perform gas leak inspection using
gas leak tester.
Are above items normal?
•
INSPECT EVAPORATOR PIPING
CONNECTIONS IN A/C UNIT FOR GAS
11 LEAKAGE
Are piping connections for evaporator in
•
A/C unit free of gas leakage?
Replace condenser and bleed refrigerant line
for 30 min or more using a vacuum pump, add
refrigerant to specified level, then go to Step
No
20. (Since water has intermixed in
receiver/drier and it is saturated, replacement is
necessary.)
Replace expansion valve, then go to Step 20.
Yes (Since valve closes too much, replacement is
necessary.)
Install heat-sensing tube securely in proper
No
position, then go to Step 20.
Yes Go to next step.
If piping or A/C component(s) are damaged or
cracked, replace them.
No
Then go to Step 20.
If there is no damage, go to Step 13.
If the vane makes a noise, add 10 ml {10 cc,
0.34 fl oz} of compressor oil to the A/C
compressor. Verify that the noise is no longer
Yes heard.
Adjust refrigerant to specified amount, then go
to Step 20.
(w) RX-8 - HVAC
Page 80