3 Series E30 325i (M20) SAL
64 50 ...
Air conditioner test (R 134a)
Before A/C efficiency test, satisfy following conditions:
1.
Provide a MoDiC or DIS. Safeguard electrical system integrity by checking the fault memory (no faults in the fault
memory).
2.
Provide a thermometer with separate gauge.
3.
Perform the test in a suitable work bay with an ambient temperature between 20
°
C and 30
°
C.
Re 1:
Connect MoDiC or DIS to car and display evaporator temperature.
Re 2:
Position a thermometer with a separate gauge approx. 5 cm below the roof liner at the height of the B-pillar. Lay
gauge outwards out of vehicle interior.
Re 3:
Heating up vehicle interior:
-
A/C button is not activated during heating up.
-
Close all windows and doors.
-
Set recirculated air mode.
-
Select air distribution mode for footwell and defrosting.
-
Maximum temperature setting.
-
Maximum fan stage.
-
Run engine at approx. 2000 rpm until operating temperature is reached, then idle speed.
A/C efficiency test:
Turn on A/C compressor at a vehicle interior temperature of 50
°
C.
After 3-4 minutes, the evaporator sensor temperature must be
≤
15
°
C.
Draw off A/C system if this temperature is not reached. Measure amount of refrigerant drawn off.
If drawn-off quantity does not correspond to specified fill quantity: supplement refrigerant and repeat test.
If fill quantity is correct, continue troubleshooting by pressure measurement.
Note:
A/C systems with uncontrolled compressors only:
If necessary, then continue troubleshooting by pressure measurement.
RA Air conditioner test (R 134a)
BMW AG - TIS
26.01.2013 12:37
Issue status (12/2007) Valid only until next DVD is issued
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