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20
Recharge the Vehicle A/C System
(N/A for 34788NI-H)
1. Connect both service hoses to the vehicle’s service ports.
2. Select CHARGE from the MAIN MENU.
3. The user will be prompted to enter service data. Select
once complete to continue. The display shows
Charge: XX.XXX kg on High Side
Oil Amount: XXX ml
Min Charge quantity 10g
4. Use the arrow keys and the numeric keypad to enter the
desired charge amount. Select to change units.
5. Using the arrow keys, maneuver to the charge path
selection. High Side is default. To change, select
on the control panel. This will allow the user to toggle
between high, low, and both side charge paths. The
current selection is indicated on the display.
6. Oil can also be injected into the system during the
charge. Use the numeric keypad to enter the desired
oil inject amount. Select to change units. Make
sure there is available oil in the oil/dye inject bottle
located on the rear of the machine and verify the
correct oil viscosity is selected. See “Select Oil Viscosity
(N/A for 34788NI-H)” on page 13.
7. Select to start the charge process. Moving or bumping
the machine at this point may result in an inaccurate
charge. When the charge cycle approaches the desired
weight value, the machine slows down. It will charge,
settle, charge again, settle, etc.
8. When prompted, select to perform hose equalization.
Select to perform hose compensation.
Note: Hose equalization requires the user to start the vehicle.
Hose compensation adds a preset amount of refrigerant to
the chart to compensate for service hose volume.
9. When the CHARGE COMPLETE screen appears, it
includes a summary of charge results. The user may select
to print the summary, if a printer is installed. Select
to proceed to clear the service hoses.
10. The user will be prompted to close the coupler valves and
disconnect the hoses from the vehicle. Select to recover
any remaining refrigerant from the hoses. Once the hose
clear is complete, the machine will return to the Main Menu.
The vehicle A/C system is now ready for use.
WARNING: To prevent personal
injury while working with refrigerant,
read and follow the instructions
and warnings in this manual, and
wear protective equipment such as
goggles and gloves.
Note: The charging process differs from
vehicle to vehicle. Charge function for vehicles
equipped with a single service tting should
be carried out manually. Refer to the vehicle
service manual for specic instructions.
CAUTION: If the low-side (blue) or high-side
(red) coupler valve is left open during the
hose clearing process, the system will pull
refrigerant back out of the vehicle.
Operating Instructions
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