MAHLE AIR-NEX 9380, Service Manual

Page: 27 / 42

| AIR-NEX 9380/9480 | 27 en
© MAHLE
Fig. 35: Inlet tap of the internal bottle
It is recommended to not disperse the refrigerant in the
atmosphere.
If it is necessary to provide for emptying of the internal tank,
you have to carry out refrigerant recovery with a second
machine, after having interconnected the equipment with the
HP pipe and having placed the machine to empty with the open
tank and open R valve.
15.2.2
Replacement of logic electronic
board with display
If the problem is located in the touch-screen or missing pixels
or rows in the display replace it with a new original one (see
APPENDIX 3 to identify the connectors involved on display
touch-screen).
Further after having excluded any problem regarding software,
power supply, fuses on the switch block, connection cables,
faults in the power board, running out of the clock battery,
faults in the sensors and scales.
Replacement of the logic electronic board is required in case
of:
•
Impossibility to correctly complete programming.
•
Incorrect display operation
•
Block in the acquisition and display of the analogue
signals not caused by faults in the sensors or by a
miscalibration.
•
Incorrect activation of command relays.
•
Wrong indications of the internal clock not due to lack of
adjustment or running out of battery.
•
Evident damage to board components and circuits.
For the replacement of the board it is recommended to position
the new board alongside the one to be replaced. Disconnect
and reconnect the cables in sequence one by one, please read
as reference the APPENDIX 3 – AIR-NEX 9380/9480 -
ELECTRICAL CONNECTION – LOGIC ELECTRONIC BOARD
After electronic board replacement:
•
Switch ON the station with new Logic Electronic board,
•
Connect the ACX station to the WiFi when required,
•
automatically will start the download of software.
•
Finished the download the ACX station will ask to carry
out
1)
Internal bottle scale calibration
2)
oil weight calibration
3)
pressure calibration
Finished the calibrations and carried out the setting to meet the
user needs the station is able to work.
15.2.3
Replacement of electronic power board
After having excluded any problem regarding power supply, fuses
on the switch block, connection cables, faults in the logic board,
faults in the controlled actuators, replacement is required in case
of:
•
Incorrect functioning of the power supply unit section.
•
Incorrect activation of the command relays or the actuators
connected to them.
•
Evident damage to board components and circuits.
For the replacement of the board it is recommended to position the
new board alongside the one to be replaced. Disconnect and
reconnect the cables in sequence one by one as described on the
APPENDIX 4 – AIR-NEX 9380/9480 - ELECTRICAL CONNECTION
– POWER ELECTRONIC BOARD AND POWER SUPPLY