EN
113
VAS 6746B
Service tasks
9.5
Calibrating the pressure transducer
I
1. In the basic menu, use the cursor keys
or
to select
“Other selections”
:
2. Press
ENTER
to confirm.
3. Use the cursor keys
or
to select
“Service.”
:
4. Press
ENTER
to confirm.
5. Enter the password
“2224”
.
6. Confirm
“Pressure transducer”
by pressing
ENTER
.
7. Then follow the instructions in the display.
– Unscrew the service couplings (
13
) and (
14
) from the service
hoses (
11
) and (
12
).
– Use the keypad (
8
) to enter the current local atmospheric pressure
and press
ENTER
to confirm.
I
8. When calibration has been completed, press
ENTER
to exit the
menu.
9. Press
STOP
twice to access the standby menu.
10. Screw the service couplings (
13
) and (
14
) hand-tight onto the service
hoses (
11
) and (
12
), taking care not to mix up the red and blue mark-
ings on the couplings and hoses.
NOTE
The pressure transducer has to be correctly calibrated in order to make
accurate pressure measurements.
Calibration is required:
Every four weeks
If the AirConServiceCenter has been subjected to heavy shaking
Every time the vacuum pump oil is changed
If the display shows implausible pressure readings
S h o rt s e l e c t i o n
□
F r e e s e l e c t i o n
□
O t h er s e l e c t i o n s
■
E N T ER - O K S T O P - E X I T
⬍
I n t .v e s s e l f i l l i n g
□
F l u sh i n g
□
R e s et S c a l e s .
□
S e r vi c e .
■
NOTE
You can look up the current atmospheric pressure for your region on the
Internet, for example at http://www.meteo24.de/wetter/ under “Luft-
druck” (air pressure).
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