Mazda RX-8 Manual page 1708

CHECK TO SEE WHETHER
MALFUNCTION IS IN BLOWER UNIT
INTAKE AND CONDENSER OR
ELSEWHERE
Are refrigerant high-pressure and low-
•
pressure values both high?
INSPECT BLOWER UNIT INTAKE
4
Is blower unit intake clogged?
•
INSPECT CONDENSER
Inspect condenser.
•
5
(See CONDENSER INSPECTION )
Is it normal?
•
CHECK TO SEE WHETHER
MALFUNCTION IS IN EXPANSION VALVE,
RECEIVER/DRIER AND REFRIGERANT
LINES OR ELSEWHERE
6
Are refrigerant high-pressure and low-
•
pressure values low?
CHECK TO SEE WHETHER
MALFUNCTION IS IN EXPANSION VALVE
AND RECEIVER/DRIER OR ELSEWHERE
Immediately after A/C compressor
•
7
operates, does refrigerant high-pressure
value momentarily rise to correct value,
then fall and stay below it? (Is there
negative pressure on low-pressure side?)
8
No Go to Step 6.
Remove obstruction, then go to Step 20. (If air
does not reach evaporator within A/C unit, heat
exchange does not occur and refrigerant
Yes pressure becomes high.
Therefore, removal of obstruction is
necessary.)
No Go to next step.
Adjust refrigerant to specified amount, then go
Yes
to Step 20. (Excessive amount of refrigerant.)
Replace condenser, or repair and clean
No
condenser fins, then go to Step 20.
Yes Go to next step.
No Go to Step 14.
Yes Go to next step.
No Go to Step 10.
Yes Go to next step.
(w) RX-8 - HVAC
Page 79