Oob Pressures Calibration (Service Kit); Gas Weight Calibration - MAHLE AIR-NEX 9380 Service Manual

Measure the pressure reached by the reference gauge and,
insert the value on the screen of ACX unit when required by
software and press enter OK.
Subsequently the equipment will execute the vacuum, at
the end of which one will be asked to check that the gauge
reaches -1 bar, when requested by the guided procedure
press enter OK to confirm calibration.
9.3 OOB Pressures calibration (service
kit)
This function is possible to do only before to carry out the
First Vessel Filling (before to fill refrigerant) if the station
showed problems on the pressure measures.
From the SECURED SERVICE menu, (insert the password
"BRN"), select OOB PRESSURE CALIBRATION and press
START, read the messages, and enter OK to confirm.
Disconnect the LP and HP quick couplers from any A/C
system and press enter OK.
Then the message asks to connect to LP hose the bottle
fitting adapter (alone, not connected to the bottle), included
in the ACX station accessories kit; when the next message
is displayed.
Fig. 16: LP quick coupler opening
Turn the LP quick coupler clockwise to open it and press
enter OK so that air gets into the LP hose.
Wait for the message to connect the reference gauge
contained in the service kit and, by rotating LP counter
clockwise, close and remove the bottle fitting adapter.
WARNING:
BE SURE BEFORE TO CONFIRM, THAT BOTTLE FITTING
ADAPTER HAS BEEN REMOVED FROM LP QUICK
COUPLER.
Subsequently the equipment will execute the vacuum, at
the end of which one will be asked to check that the gauge
reaches -1 bar, when requested by the guided procedure
press enter OK to confirm calibration.
9.4

Gas weight calibration

From the SECURED SERVICE menu, (insert the password "BRN"),
Select the "Gas Weight calibration" follow the instruction on the screen.
The reference weight need to be
20 kg) to be placed on the arm connected above the load cell.
Fig. 14: cylinder
disconnected
Disconnect the vessel from
the scale.
Lift it and insert the spacer
under the vessel/cylinder
Fig. 16: Reference weight on the arm
Place the reference weight on the top of the arm (i.e. 5 kg on
drawing above)
| AIR-NEX 9380/9480 | 16 en
≥
4 kg max 22 kg (advised from 8 to
Fig. 15: cylinder re-connected with
arm
Re-connect the vessel/cylinder to
the scale. Insert the arm below the
vessel/cylinder.