MAHLE ACX380, Service Manual

Page: 23 / 45

© MAHLE
14.2 Hoses emptying
To empty the charge hoses completely perform the hoses
emptying phase.
Select the hoses emptying function from the menu. Wait
the end of the procedure.
14.3 Air purge
In the main menu select MAINTENANCE and press
PURGE”.
By selecting this function, it is possible to manually
discharge the non condensable gases by means of the
solenoid valve.
Automatically every 7 days, the station will show the
possibility to automatically check (automatic function
named AIR PURGE SYSTEM) for condensable gases.
14.4 Vessel filling
In the main menu select MAINTENANCE and press
“VESSEL FILLING”.
Set the quantity of refrigerant to fill and follow the guided
procedure shown on the display.
The set value is limited to avoid to fill too much the internal
cylinder.
Only when the message appears asking to connect the
charge tank, connect the LP quick coupler (colour
the unit to an external refrigerant tank using the supplied
adaptor.
When the message occurs open the coupler by turning the
knob clockwise. Open the valve on the external tank.
Just right before reaching the planned quantity of
refrigerant, the unit will stop and ask the user to close the
external refrigerant tank. Then, the device will continue the
recovery from the hoses and ends when these are empty.
Hence, it is necessary to open the LP quick-coupler and
disconnect it from the external tank.
Thanks to the E³ CONNECT function, the refrigerant
usually kept between the cylinder fitting and the hose quick
coupler until the end of the process - will not be released in
the environment.
There may be two types of source tanks: with plunger and
without plunger.
Tanks with plunger shall remain upright to be able to
transfer liquid refrigerant; for this type of tanks con
the L (liquid) coupler.
Tanks without plunger have only one valve, so they must
be turned upside down to transfer the liquid refrigerant.
To empty the charge hoses completely perform the hoses
Select the hoses emptying function from the menu. Wait
In the main menu select MAINTENANCE and press “AIR
By selecting this function, it is possible to manually
discharge the non condensable gases by means of the
Automatically every 7 days, the station will show the
possibility to automatically check (automatic function
PURGE SYSTEM) for condensable gases.
In the main menu select MAINTENANCE and press
Set the quantity of refrigerant to fill and follow the guided
oo much the internal
Only when the message appears asking to connect the
quick coupler (colour blue) of
the unit to an external refrigerant tank using the supplied
urning the
knob clockwise. Open the valve on the external tank.
Just right before reaching the planned quantity of
refrigerant, the unit will stop and ask the user to close the
external refrigerant tank. Then, the device will continue the
hoses and ends when these are empty.
coupler and
Thanks to the E³ CONNECT function, the refrigerant -
usually kept between the cylinder fitting and the hose quick-
will not be released in
There may be two types of source tanks: with plunger and
shall remain upright to be able to
transfer liquid refrigerant; for this type of tanks connect to
have only one valve, so they must
be turned upside down to transfer the liquid refrigerant.
The LP gauge indicates the pressure inside the external tank.
After some minutes the unit will automatically end the function.
At the end the weight of the charged refrigerant will be displayed.
14.5 Pressures zero
In the main menu select MAINTENANCE and press “PRESSURES
ZERO”.
This function allows to determine and store the at
pressure value.
We recommend running this procedure every time the A/C service
station will be moved from a location to another with a different
altitude.
14.6 Self leak test
In the main menu select MAINTENANCE and p
TEST”.
A leak test is carried out on the internal components of A/C service
station.
This phase includes:
•
Hoses emptying
•
Vacuum test
This test allows to check the tightness of the internal circuits of the
equipment from the solenoid valve, allowing the fluid outflow from
the internal cylinder, to the manifold, (metallic component housing
the check solenoid valves) to the compressor infeed, including the
dryer filter leak test.
In case of failed leak test, it is necessary to check the charge hoses
conditions and the quick couplers leak, and make
repair and then repeat the test.
14.7 E³ PUMP
The A/C service station is equipped with a special function named
E³ PUMP that enables to optimize the vacuum pump oil use by
avoiding the replacement every 60 hours of operation.
E³ PUMP is a special function allowing to extend even to 1000 hours
the life of the pump oil used in the station. E³ PUMP function
performance is suggested at the end of 60
of the vacuum pump and can be manually activated in the
MAINTENANCE menu pressing E³ PUMP.
E³ PUMP procedure has to be started only after checking and, if
necessary, topping up the pump oil level and lasts 1 hour: dur
this time the tool cannot be used.
During the procedure the oil is automatically purified from the
gaseous polluting residues absorbed during the emptying
operations of vehicles air conditioning systems.
At the end of the E³ PUMP procedure,
•
in case of negative result or
•
after 1000 hours of vacuum pump operation since the last
oil change, the E³ PUMP procedure ca
anymore
It is necessary to replace the vacuum pump oil.
| ACX380/480 | 23
en
gauge indicates the pressure inside the external tank.
automatically end the function.
At the end the weight of the charged refrigerant will be displayed.
In the main menu select MAINTENANCE and press “PRESSURES
This function allows to determine and store the atmospheric
We recommend running this procedure every time the A/C service
moved from a location to another with a different
In the main menu select MAINTENANCE and press “SELF LEAK
nternal components of A/C service
This test allows to check the tightness of the internal circuits of the
equipment from the solenoid valve, allowing the fluid outflow from
o the manifold, (metallic component housing
the check solenoid valves) to the compressor infeed, including the
In case of failed leak test, it is necessary to check the charge hoses
conditions and the quick couplers leak, and make the possible
The A/C service station is equipped with a special function named
E³ PUMP that enables to optimize the vacuum pump oil use by
avoiding the replacement every 60 hours of operation.
ial function allowing to extend even to 1000 hours
the life of the pump oil used in the station. E³ PUMP function
performance is suggested at the end of 60-hour operation intervals
of the vacuum pump and can be manually activated in the
essing E³ PUMP.
E³ PUMP procedure has to be started only after checking and, if
necessary, topping up the pump oil level and lasts 1 hour: during
During the procedure the oil is automatically purified from the
luting residues absorbed during the emptying
operations of vehicles air conditioning systems.
after 1000 hours of vacuum pump operation since the last
oil change, the E³ PUMP procedure cannot be activated
It is necessary to replace the vacuum pump oil.