Hoses Emptying; Air Purge; Vessel Filling; Pressures Zero - MAHLE ACX380 Service Manual

14.2

Hoses emptying

To empty the charge hoses completely perform the hoses To empty the charge hoses completely perform the hoses
emptying phase.
Select the hoses emptying function from the menu. Wait 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 In the main menu select MAINTENANCE and press "AIR
PURGE".
By selecting this function, it is possible to manually By selecting this function, it is possible to manually
discharge the non condensable gases by means of the discharge the non condensable gases by means of the
solenoid valve.
Automatically every 7 days, the station will show the Automatically every 7 days, the station will show the
possibility to automatically check (automatic function possibility to automatically check (automatic function
named AIR PURGE SYSTEM) for condensable gases. PURGE SYSTEM) for condensable gases.
14.4

Vessel filling

In the main menu select MAINTENANCE and press In the main menu select MAINTENANCE and press
"VESSEL FILLING".
Set the quantity of refrigerant to fill and follow the guided 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 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 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. knob clockwise. Open the valve on the external tank.
Just right before reaching the planned quantity of Just right before reaching the planned quantity of
refrigerant, the unit will stop and ask the user to close the refrigerant, the unit will stop and ask the user to close the
external refrigerant tank. Then, the device will continue the external refrigerant tank. Then, the device will continue the
recovery from the hoses and ends when these are empty. 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 - Thanks to the E³ CONNECT function, the refrigerant
usually kept between the cylinder fitting and the hose quick- 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 There may be two types of source tanks: with plunger and
without plunger.
Tanks with plunger shall remain upright to be able to shall remain upright to be able to
transfer liquid refrigerant; for this type of tanks con transfer liquid refrigerant; for this type of tanks connect to
the L (liquid) coupler.
Tanks without plunger have only one valve, so they must have only one valve, so they must
be turned upside down to transfer the liquid refrigerant. be turned upside down to transfer the liquid refrigerant.
© MAHLE
oo much the internal
quick coupler (colour blue) of
urning the
coupler and
will not be released in
The LP gauge indicates the pressure inside the external tank. 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. 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 In the main menu select MAINTENANCE and press "PRESSURES
ZERO".
This function allows to determine and store the atmospheric This function allows to determine and store the at
pressure value.
We recommend running this procedure every time the A/C service We recommend running this procedure every time the A/C service
station will be moved from a location to another with a different moved from a location to another with a different
altitude.
14.6

Self leak test

In the main menu select MAINTENANCE and press "SELF LEAK 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 This test allows to check the tightness of the internal circuits of the
equipment from the solenoid valve, allowing the fluid outflow from equipment from the solenoid valve, allowing the fluid outflow from
the internal cylinder, to the manifold, (metallic component housing o the manifold, (metallic component housing
the check solenoid valves) to the compressor infeed, including the 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 In case of failed leak test, it is necessary to check the charge hoses
conditions conditions and the quick couplers leak, and make and the quick couplers leak, and make the possible
repair and then repeat the test.
14.7 E³ PUMP
The A/C service station is equipped with a special function named The A/C service station is equipped with a special function named
E³ PUMP that enables to optimize the vacuum pump oil use by E³ PUMP that enables to optimize the vacuum pump oil use by
avoiding the replacement every 60 hours of operation. avoiding the replacement every 60 hours of operation.
E³ PUMP is a special function allowing to extend even to 1000 hours ial function allowing to extend even to 1000 hours
the life of the pump oil used in the station. E³ PUMP function the life of the pump oil used in the station. E³ PUMP function
performance is suggested at the end of 60-hour operation intervals performance is suggested at the end of 60
of the vacuum pump and can be manually activated in the of the vacuum pump and can be manually activated in the
MAINTENANCE menu pressing E³ PUMP. essing E³ PUMP.
E³ PUMP procedure has to be started only after checking and, if E³ PUMP procedure has to be started only after checking and, if
necessary, topping up the pump oil level and lasts 1 hour: during 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 During the procedure the oil is automatically purified from the
gaseous polluting luting residues residues
operations of vehicles air conditioning systems. 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 after 1000 hours of vacuum pump operation since the last
oil change, the E³ PUMP procedure ca oil change, the E³ PUMP procedure cannot be activated
anymore
It is necessary to replace the vacuum pump oil. It is necessary to replace the vacuum pump oil.
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en
automatically end the function.
nternal components of A/C service
absorbed absorbed during during the the emptying emptying