14.7
Calibrating the pressure transducer
The pressure transducer has to be correctly calibrated in order to make accurate pressure measurements. Cali-
bration is required:
• Every four weeks
• If the A/C service unit has been subjected to heavy shaking
• Every time the vacuum pump oil is changed
• If the display shows implausible pressure readings
1. In the basic menu use the cursor keys
Short selection
Free selection
Other selections
ENTER-OK
2. Depressurize the A/C service unit (as described in chapter
3. Press
ENTER
4. Use the cursor keys
Service.
5. Press
ENTER
6. Enter the password
7. Confirm Pressure transducer by pressing
The device evacuates the service hoses.
8. Unscrew the service couplings from the service hoses (7) and (8).
9. Press
ENTER
The device equalizes with the ambient pressure.
10. Screw the service couplings and hand-tight onto the service hoses (7) and (8), taking care not to mix up the
red and blue markings on the couplings and hoses.
11. Use the keypad to enter the current local atmospheric pressure and press
Note You can look up the current atmospheric pressure for your region on the Internet, for example at
www.weatherpro.com
12. When calibration has been completed, press
13. Press
STOP
twice to access the standby menu.
14. To evacuate the service hoses, perform a short vacuum phase (see
14.8
Changing the vacuum pump oil
WARNING! Electrocution hazard Touching uninsulated parts may result in serious injury. Switch off the
A/C service unit and unplug it from the power supply before opening the housing. the A/C service unit
may only be repaired by personnel authorized by Dometic.
1. Before changing the oil, let the vacuum pump run for about 10 min (manually, via the menu).
to confirm.
or
to select Service
to confirm.
.
2224
to confirm.
under
air pressure
or
to select Other selections.
Changing the dryer filter
----
ENTER
.
.
ENTER
to exit the menu.
on page 31.
ENTER
to confirm.
Free Selection
on page 24).
EN
33