Setup; Internal Bottle Fill - Matco Tools AC442 Operation Manual

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17| AC442 | A/C System service

7.3 Setup

From the SETUP menu, it is possible to enable/disable and
set certain parameters prior to performing A/C system
service. To access SETUP from the main menu, press,
and the SETUP menu will be displayed.
Parameter Description
Allows connection to wireless internet
Wi-Fi
access
Print Provide print options
Update Allows software updating
Brightness Adjustment of screen backlight
Maintenance
Displays historical unit information
Counters
Units of Allows metric and empirical unit changes for
measurement all unit parameters
Account User information definitions
Allows adjustment of user language on
Language
display
Remote Control Used for remote tech service diagnostics
System
Displays all internal system information
Information
Date and Time Adjustment of date and time
Allows enable and disable for selected
Settings
functions
Configure Password protected service information
Check the type of source tank, 2 types are available:
—
Refrigerant cylinder with plunger (typically 2
valves):
Connect to the liquid valve and keep tank in the
upright position to transfer refrigerant.
—
Refrigerant cylinder without plunger (single
valve):
Connect to the available valve and invert tank to
transfer refrigerant.
Fig. 13: Virgin refrigerant cylinder tank types
The LP (blue) gauge indicates the pressure inside the
external cylinder
7.4

Internal Bottle Fill

Warning – Risk of frostbite from
escaping refrigerant
Refrigerant causes severe frostbite
on the skin.

Check the service hoses for damage.

Firmly connect the service quick-release
couplings to the service hoses.

Wear protective goggles.

Wear protective gloves.
Before the AC442 can be used, the internal refrigerant
bottle must be filled with liquid refrigerant. Use only
R134a refrigerant.
A menu-driven refrigerant check is performed before
filling the internal refrigerant bottle.
The refrigerant can be obtained from your gas supplier. It
can be stored normally and transported in bottles with
connection fittings.
To ensure a reliable procedure, it is advisable to use the
optimum quantity of refrigerant. The optimum quantity
of refrigerant for the ACX2250 is 4kg – 9.5kg.
An inadequate quantity may make efficient filling of the
vehicle air conditioning system impossible. Also, if there
is an insufficient quantity, the ACX2250 may not be able
to operate efficiently. In the event of an excessive
quantity, there may not be sufficient space for the
refrigerant recovered from the vehicle air conditioning
system.
Generally speaking, the actual quantity of refrigerant
added exceeds the set quantity by approx. 200g as there
is no refrigerant in the internal refrigerant circuit. Add
200g to the set quantity when filling with refrigerant for
the first time.
1. Select "Maintenance>>Internal bottle fill".
2. Follow the menu prompting.
The current pressure inside the external refrigerant bottle
is indicated on the low-pressure gauge.
Any amount of refrigerant between 200g and 10500g can
be added.
Do not interrupt the automatic filling process prior to
automatic termination by the AC442.
Press the Home key to check the quantity of refrigerant in
the internal refrigerant bottle upon completion of the
filling operation.
1901016-85