Troubleshotting
Step 5
6
Inspection Yes
Adjust refrigerant to specified quantity, then go to step 19. (excessive quantity of refrigerant)
No
Replace condenser, or repair and clear condenser vanes, then go to step 19.
Yes
Go to next step.
No
Go to step 13.
Verify whether malfunction is in expansion valve, reservoir/drier or elsewhere.
Yes
Go to next step.
l
high-pressure value correct value, and then it after a/c compressor negative pressure on
No
Go to step 19.
Verify whether malfunction is in expansion valve and reservoir/drier.
Yes
Replace expansion valve, then go to step 19. (since the expansion valve is closed too tight, it should be replaced)
No
Start vacuum pump and operate for 30 minutes, then go to step 19. (since water has intermixed in reservoir/drier and saturated, it must be replaced.)
Inspect condenser l
Inspect condenser (see u-16, condenser inspection)
l
Is it normal?
Verify whether malfunction is in expansion valve, reservoir/drier and cooling pipeline or elsewhere. l
7
8
Action
Are pressures of refrigerant pipeline at high and low side both low?
Does refrigerant momentarily rise to fall and stay below started? (is there low-pressure side?)
l
Turn a/c switch off allowing air conditioner to stop for 10 minutes.
l
Start engine.
l
Turn both a/c and front fan switch on.
l
Does malfunction occur after compressor switch is turned on?
a/c
U-33
