MAHLE ACX150, Service Manual

Page: 16 / 202

EN | 15 | ACX150/250 | Maintenance
© MAHLE
Only when the message appears asking
to connect the charge tank, connect the
LP quick coupler (colour blue) of 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 connect to the L (liquid)
coupler.
Tanks without plunger 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.
6.3 Self leak test
In the main menu select MAINTENANCE
and press “SELF LEAK TEST”.
A leak test is carried out on the internal
components of ACX150/250.
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
the possible repair and then repeat the
test.
6.4 Cylinder pressure
check
In the main menu select MAINTENANCE
and press “CYLINDER PRESSURE
CHECK”.
Inside the equipment the internal tank will
be connected to HP gauge to allow the
reading of the refrigerant pressure.
6.5 Cylinder refrigerant
view
In the main menu select MAINTENANCE
and press “CYLINDER REFRIGERANT
VIEW”.
The available refrigerant for next
recharging is 2 kg less than the total
contents of the cylinder.